R8: Accounting- + Supervisor-Modul + Core-Datenfundament (S-0)

Portierung der beiden fehlenden Grundbausteine aus PolytraderSharp (voller Ausbau).

Core S-0 (Datenfundament fuer Analyse/Forensik):
- core_decision_journal + core_order_events (+ ReasonCode/Decision/OrderEvent-Enums),
  IDecisionJournal/IOrderEventLog mit fehlertoleranten EF-Impls (Handel bricht nie).
- SignalId-Durchreichung TradeSignal -> ExecutionService -> core_trade_history;
  ExecutionService schreibt an jeder Verzweigung Journal/Order-Events.
- JSONL-Log-Sink (LogJson + Dual-Sink), pure Analytik: RealizedPnlEngine (FIFO),
  TradeAnalytics, DossierBuilder. Migration AddAnalysisFoundation.

Accounting-Modul (acc_): unabhaengiger IBKR-Kontoauszug (Activity Flex Query) hinter
Interfaces mit Offline-Null-Stubs -> append-only Ledger + Periodenabrechnung/BWA + FX
(USD/EUR) + CSV/PDF (PDFsharp/MigraDoc). Steuerschicht bewusst offen (Platzhalter-Tab).
Kein Handel. Migration InitialAccounting.

Supervisor-Modul (sup_): read-only OpenRouter-Agent (Function-Calling-Loop) + read-only
Tool-Registry (8 Tools) + Profile + Dossier-Browser + Counterfactual-Job (Stub) +
Tagesbericht/MCP-Light (opt-in). Migration InitialSupervisor.

Verdrahtung: Program.cs (beide Module + Icons), slnx/App/Tests-Referenzen,
provision-db.ps1, AppSettings-Sektionen, docs/konzepte, README.

Tests: 79 -> 117 gruen (FIFO/KPIs/Dossier/JSONL, Classifier/Engine/FX/Idempotenz,
OpenRouter/Registry/Agent/MCP, STA-Konstruktion beider neuen Fenster).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

IBKRTrader.App.csproj

@@ -43,6 +43,8 @@
   <ItemGroup>
     <ProjectReference Include="src\IBKRTrader.Core\IBKRTrader.Core.csproj" />
     <ProjectReference Include="src\IBKRTrader.Modules.CongressTrading\IBKRTrader.Modules.CongressTrading.csproj" />
+    <ProjectReference Include="src\IBKRTrader.Modules.Accounting\IBKRTrader.Modules.Accounting.csproj" />
+    <ProjectReference Include="src\IBKRTrader.Modules.Supervisor\IBKRTrader.Modules.Supervisor.csproj" />
   </ItemGroup>
 
   <ItemGroup>

IBKRTrader.slnx

@@ -2,5 +2,7 @@
   <Project Path="IBKRTrader.App.csproj" />
   <Project Path="src/IBKRTrader.Core/IBKRTrader.Core.csproj" />
   <Project Path="src/IBKRTrader.Modules.CongressTrading/IBKRTrader.Modules.CongressTrading.csproj" />
+  <Project Path="src/IBKRTrader.Modules.Accounting/IBKRTrader.Modules.Accounting.csproj" />
+  <Project Path="src/IBKRTrader.Modules.Supervisor/IBKRTrader.Modules.Supervisor.csproj" />
   <Project Path="tests/IBKRTrader.Tests/IBKRTrader.Tests.csproj" />
 </Solution>

Program.cs

@@ -5,12 +5,16 @@ using IBKRTrader.Core.DependencyInjection;
 using IBKRTrader.Core.IBKR;
 using IBKRTrader.Core.Logging;
 using IBKRTrader.Core.Modularity;
+using IBKRTrader.Core.Persistence;
+using IBKRTrader.Core.Persistence.Ef;
 using IBKRTrader.Core.Security;
 using IBKRTrader.Core.Settings;
 using IBKRTrader.Core.Trading;
 using IBKRTrader.Core.Workers;
 using IBKRTrader.Core.Workers.BuiltIn;
+using IBKRTrader.Modules.Accounting;
 using IBKRTrader.Modules.CongressTrading;
+using IBKRTrader.Modules.Supervisor;
 using IBKRTrader.UI;
 using IBKRTrader.UI.Views;
 using Microsoft.Extensions.Configuration;
@@ -42,7 +46,7 @@ internal static class Program
 
         ApplicationConfiguration.Initialize();
 
-        var modules = new List<IModule> { new CongressTradingModule() };
+        var modules = new List<IModule> { new CongressTradingModule(), new AccountingModule(), new SupervisorModule() };
 
         AppHost = Host.CreateDefaultBuilder()
             .UseContentRoot(AppContext.BaseDirectory)
@@ -110,6 +114,10 @@ internal static class Program
         services.AddSingleton<TradeHistoryService>();
         services.AddSingleton<AIModelService>();
 
+        // Datenfundament für Analyse/Forensik (Supervisor): Entscheidungsjournal + Order-Events.
+        services.AddSingleton<IDecisionJournal, EfDecisionJournal>();
+        services.AddSingleton<IOrderEventLog, EfOrderEventLog>();
+
         // Trading-Kern
         services.AddSingleton<DashboardService>();
         services.AddSingleton<IRiskService, RiskService>();
@@ -156,6 +164,8 @@ internal static class Program
             ["core.logs"]            = Properties.Resources.error_log,
             ["core.settings"]        = Properties.Resources.setting_tools,
             ["congresstrading.main"] = Properties.Resources.cross_reference,
+            ["accounting.main"]      = Properties.Resources.coins_in_hand,
+            ["supervisor.main"]      = Properties.Resources.token_quantifier,
         };
         foreach (var view in uiHost.Views)
             if (view.Icon is null && map.TryGetValue(view.Id, out var img))
@@ -253,7 +263,7 @@ internal static class Program
     {
         ApplicationConfiguration.Initialize();
 
-        var modules = new List<IModule> { new CongressTradingModule() };
+        var modules = new List<IModule> { new CongressTradingModule(), new AccountingModule(), new SupervisorModule() };
 
         using var host = Host.CreateDefaultBuilder()
             .UseContentRoot(AppContext.BaseDirectory)

README.md

@@ -16,6 +16,8 @@ tests/IBKRTrader.Tests             xUnit (Unit + EF-InMemory)
 - **Persistenz**: EF Core (Pomelo/MariaDB), Migrationen **extern** angewendet (nicht zur Laufzeit).
 - **Trading-Kern**: `IExecutionService` (Signal→Risiko→Order→Buchung), `IRiskService`, `IPortfolioService`,
   Broker hinter `IBrokerClient` (Default: `NullBrokerClient` – handelt nie, bis IBKR angebunden).
+- **Analyse-Datenfundament**: `core_decision_journal` (jede Entscheidung + ReasonCode), `core_order_events`,
+  `SignalId`-Korrelation, JSONL-Log-Sink (`Logs/{yyyy-MM-dd}.jsonl`) – speist den Supervisor.
 - Details: [docs/ARCHITECTURE.md](docs/ARCHITECTURE.md).
 
 ## Build & Test
@@ -30,6 +32,9 @@ dotnet run --project IBKRTrader.App.csproj                 # App starten
 - `appsettings.Local.json` (gitignored) hält den DB-Connection-String (`Database:MySqlConnectionString`).
 - `settings.json` (gitignored) – App-Settings (IBKR-Ports, Logging, Worker, Trading).
 - Optional `IBKRTRADER_MASTER_KEY` bzw. `master.key` für at-rest-Verschlüsselung (AES-256-GCM).
+- Supervisor (optional): `IBKRTRADER_OPENROUTER_KEY` bzw. `openrouter.key` (KI-Analyse), sowie die
+  Opt-ins `IBKRTRADER_SUPERVISOR_DAILY` (Tagesbericht, Stunde 0–23) und `IBKRTRADER_MCP_PORT` (MCP-Light,
+  nur 127.0.0.1).
 
 ## Datenbank aufsetzen
 Schema wird per EF-Migrationen extern angewendet – siehe [scripts/README.md](scripts/README.md):
@@ -40,9 +45,19 @@ powershell -File scripts/provision-db.ps1
 
 ## Module
 - **CongressTrading** – kopiert US-Kongress-Trades (capitoltrades.com) → `TradeSignal` → ExecutionService.
+- **Accounting** – von der Trading-DB unabhängige Buchführung aus dem IBKR-Kontoauszug (Activity Flex
+  Query) → append-only Ledger `acc_*`, Periodenabrechnung/BWA, FX (USD/EUR), CSV/PDF-Export. Kein Handel.
+  Live-Abruf hinter Interfaces (Offline-Null-Stubs); Steuerschicht bewusst offen. Konzept:
+  [docs/konzepte/KONZEPT-Modul-Accounting.md](docs/konzepte/KONZEPT-Modul-Accounting.md).
+- **Supervisor** – read-only KI-Analyse/Forensik über alle Module (OpenRouter-Agent + read-only
+  Tool-Registry, Dossier-Browser, optional MCP-Light). Stützt sich auf das Core-Datenfundament
+  (`core_decision_journal`, `core_order_events`, `SignalId`, JSONL-Logs). Konzept:
+  [docs/konzepte/KONZEPT-Modul-Supervisor.md](docs/konzepte/KONZEPT-Modul-Supervisor.md).
 
 ## Status / Nächstes
 - Kurskorrektur auf das PolytraderSharp-Konzept (R1–R7) abgeschlossen.
+- **Accounting**- und **Supervisor**-Modul (inkl. Core-Datenfundament S-0) ergänzt; Live-Abruf (IBKR
+  Flex / OpenRouter-Key) und Steuerschicht sind bewusst noch offen (Stubs/Platzhalter).
 - **Nächster Meilenstein:** IBKR-Broker über die **TWS API / IB Gateway** (blockiert bis Paper-Zugang) –
   Plan: [docs/IBKR-Integration.md](docs/IBKR-Integration.md).
 - **Sicherheit:** DB-Passwort rotieren (liegt in der Git-Historie, Commit `ebeb035`).

docs/konzepte/KONZEPT-Modul-Accounting.md

@@ -0,0 +1,69 @@
+# Konzept: Modul „Accounting" (Buchhaltung/Reporting aller Konten)
+
+> Stand: 2026-07-30
+> Ziel: Vollständige, **von unserer Trading-DB unabhängige**, buchhalterisch korrekte Erfassung ALLER
+> Kontobewegungen der IBKR-Konten. Periodische (meist monatliche), vor einer Steuerbehörde
+> nachvollziehbare Aufstellungen — je Konto ODER über alle Konten, für frei wählbare Zeiträume.
+> BWA-artige Kennzahlen-Übersicht in der UI. Export als CSV und PDF. **Kein Handel; reines
+> Ingest-/Reporting-Modul.**
+>
+> Vorbild: gleichnamiges Modul in PolytraderSharp (Polymarket). Hier auf IBKR-Aktien übertragen.
+
+## 0. Leitprinzipien
+1. **Unabhängige Quelle = IBKR-Kontoauszug, NICHT unsere DB.** Das Modul erhebt die Buchungsgrundlage
+   ausschließlich über eigene Abrufe des **IBKR Activity Flex Query (XML)** und speichert sie roh +
+   normalisiert in eigenen `acc_`-Tabellen. Der Flex Web Service (Token + Query-Id) braucht **keine**
+   laufende TWS-Socket-Verbindung. Unsere eigenen Trade-Logs dienen nur dem optionalen Abgleich, nie
+   als Buchungsgrundlage.
+2. **Nachvollziehbarkeit / Audit.** Jeder Buchungssatz führt über `TransactionId` (IBKR tradeID /
+   transactionID) und den unveränderlichen `IdempotencyKey` auf einen prüfbaren Nachweis zurück. Der
+   Roh-Ingest ist **append-only**; Abrechnungen sind daraus reproduzierbar.
+3. **Lesend / idempotent.** Überlappende Wiederholungs-Abrufe buchen nichts doppelt (Unique-Index auf
+   `IdempotencyKey`, Upsert statt Insert).
+
+## 1. Architektur-Einbettung
+Projekt `src/IBKRTrader.Modules.Accounting/` als `IModule` (`Name="Accounting"`, `DbPrefix="acc_"`),
+Registrierung in `Program.cs`. Referenziert nur den Core. Eigener `AccountingDbContext`, eigene UI
+(ein Fenster mit Tabs), eigene Settings-Sektion.
+
+## 2. Datenbeschaffung
+- **Activity Flex Query** = primärer Kontoauszug: `<Trade>` (Käufe/Verkäufe: Preis, Menge, Kommission,
+  Währung, FX-Rate zur Basiswährung, tradeID) und `<CashTransaction>` (Dividenden, Quellensteuer,
+  Zinsen, Ein-/Auszahlungen, Gebühren).
+- **Backfill + Inkrementell**: Erstlauf lädt die volle Historie, danach nur Neues ab dem letzten
+  bekannten Zeitpunkt mit Sicherheits-Lookback (Standard 24 h).
+- **Idempotenz-Schlüssel** je Satz: `TRD|<Typ>|<tradeID>` bzw. `CASH|<Typ>|<transactionID>`.
+- **Balance-Anker**: gemeldeter Kontosaldo je Abruf als Soll-Ist-Kontrollpunkt.
+- Der Abruf liegt hinter Interfaces (`IStatementSource`/`IBalanceAnchorSource`/`IAccountingAccountSource`)
+  mit **Offline-Null-Stubs** — das Modul läuft ohne Live-Anbindung vollständig (bucht dann korrekt nichts).
+  Der Live-Flex-Abruf ist **Zielland-Arbeit**.
+
+## 3. Persistenz (`acc_`-Tabellen, append-only)
+| Tabelle | Inhalt |
+|---|---|
+| `acc_ledger` | Normalisierte, unveränderliche Buchungssätze (Typ, Vorzeichen=Cash-Wirkung, native + Basiswährung, TransactionId, **IdempotencyKey unique**) |
+| `acc_ingest_runs` | Abruf-Protokoll je Konto (Von/Bis, #neu/#Duplikate, Balance-Anker-Δ) |
+| `acc_raw` | Rohdaten-Snapshots je Batch (Nachweis) |
+| `acc_fx_rates` | amtliche USD→EUR-Tageskurse (EZB) je Datum |
+
+## 4. Logik (pur, unit-getestet — `Logic/`)
+- `AccountingClassifier` — Flex-Zeile → Buchungssatz (Typ, Vorzeichen, Idempotenz-Key). Ein-/Auszahlung
+  per Vorzeichen (kombinierte IBKR-Kategorie).
+- `AccountingEngine` — Periodenabrechnung (Anfangs-/Endsaldo, Einlagen/Entnahmen, Handelsvolumen,
+  Dividenden, Zinsen, Fees, Quellensteuer, Netto-Handelsergebnis Cash-Basis) + Monatsvergleich.
+  Invariante: Endsaldo−Anfang = Ergebnis + Einzahlungen − Auszahlungen.
+- `FxConverter` — USD→EUR (Nearest-on-or-before). `CsvExporter` (RFC-4180, kulturinvariant).
+  `PdfExporter` (PDFsharp/MigraDoc, MIT).
+- Realisierte GuV nutzt den Core-`RealizedPnlEngine` (FIFO) — kein Duplikat.
+
+## 5. UI (WinForms, ein Fenster mit Tabs)
+Übersicht/BWA (KPI-Kacheln + Monatsvergleich, Zeitraum-/Konto-/Währungswahl), Ledger (filterbar),
+Steuer (Platzhalter, s. u.), Abrechnung/Export (CSV/PDF), Abruf/Status (Ingest-Läufe, Soll-Ist, manueller
+Trigger). DB-Zugriff nur auf Interaktion (Smoke-UI-sicher).
+
+## 6. Bewusst offen / Zielland-Arbeit
+- **Live-IBKR-Flex-Abruf** (Token/Query-Id) + Balance-Anker → echte Buchungen (heute Null-Stub).
+- **Steuerschicht**: Jurisdiktion (DE-Kapitalertragsteuer / US Form 8949) noch **nicht festgelegt**.
+  Der neutrale Ledger + die Abrechnung gelten unabhängig davon; die Steuer-UI/Engine ist als klar
+  abgetrennter, später füllbarer Platzhalter angelegt. **Keine Steuerberatung.**
+- **EZB-FX-Ingest** (`acc_fx_rates` füllen) → EUR-Ansicht; USD (Basis) ist sofort verfügbar.

docs/konzepte/KONZEPT-Modul-Supervisor.md

@@ -0,0 +1,63 @@
+# Konzept: Modul „Supervisor" (KI-gestützte Handels-Analyse & Forensik)
+
+> Stand: 2026-07-30
+> Ziel: ALLES, was IBKRTrader getan (und bewusst NICHT getan) hat, detailliert analysierbar machen —
+> Entscheidungen, Orders, Trades und Logs — und die Analyse durch ein KI-Modell (OpenRouter) durchführen
+> lassen: Warum hat ein Trade funktioniert? Warum nicht? Woran lag es?
+> **Leitidee: Erst das Datenfundament, dann die KI.** Ein Modell kann nur erklären, was aufgezeichnet wurde.
+>
+> Vorbild: gleichnamiges Modul in PolytraderSharp. Hier auf IBKR übertragen; strikt read-only.
+
+## S-0 Datenfundament (Core — umgesetzt)
+Grundlage jeder guten Analyse, sofort auch OHNE KI nützlich (abfragbare Rejects, Log-Forensik):
+- **`core_decision_journal`** — JEDE Entscheidung (Executed/Rejected/Skipped/Failed) mit `ReasonCode`
+  (Enum, als String persistiert), SignalId, Kontext-JSON und Freitext. Geschrieben vom `ExecutionService`.
+- **`core_order_events`** — Order-Lifecycle (Placed/Filled/PlaceFailed/…): Preise, Menge, Broker-Antwort.
+- **`SignalId`** wird durch `TradeSignal → ExecutionService → Portfolio → core_trade_history`
+  durchgereicht → verbindet Signal → Entscheidung(en) → Order(s) → Trade.
+- **JSONL-Log-Sink** — zusätzlich zur Textdatei eine Zeile je Event nach `Logs/{yyyy-MM-dd}.jsonl`
+  (`ts, level, source, cid=SignalId, message`); zeilenweise filter-/parsebar.
+- Pure Core-Analytik: `RealizedPnlEngine` (FIFO), `TradeAnalytics` (KPIs), `DossierBuilder`.
+- Schreibpfade sind **fehlertolerant** — ein Journal-/DB-Fehler bricht den Handel nie.
+
+## S-1 Dossier
+`DossierService` setzt zu einer SignalId Entscheidungen + Order-Events + Trades + JSONL-Log-Auszug
+zusammen; `DossierBuilder` (Core, pur) rendert JSON (fürs Modell) und Markdown (für Menschen).
+
+## S-2 Agent + Tool-Registry
+- In-Prozess-Function-Calling-Loop gegen **OpenRouter** (`OpenRouterClient`, OpenAI-kompatibel).
+- **Read-only-Tools** (`SupervisorTools`): `query_decisions`, `query_order_events`, `query_trades`,
+  `get_dossier`, `read_logs`, `get_kpis`, `get_architecture_context`, `query_counterfactuals`.
+  **Kein Tool kann handeln, canceln oder schreiben.**
+- **Profile** (`SupervisorProfiles`): Allgemein / Technik / CongressTrading = System-Prompt + Tool-Subset
+  über EINER Infrastruktur (bewusst keine Agent-zu-Agent-Orchestrierung).
+- Harte Iterationsgrenze gegen Endlosschleifen; jeder Tool-Aufruf wird in der UI sichtbar geloggt.
+- System-Kontext: kuratiertes Architektur-/Verhaltensdokument (`ArchitectureContext`, inline versioniert).
+
+## S-3 Berichte & Counterfactual
+- `sup_reports` — jede Analyse (Frage/Antwort/Profil/Modell/Tool-Aufrufe) → der Supervisor ist selbst
+  auditierbar.
+- `CounterfactualJob` — „was wäre aus abgelehnten BUYs geworden?" (späterer Kurs vs. Signalpreis).
+  Die Kursauflösung liegt hinter `ICounterfactualResolutionSource` mit **Null-Stub** (Zielland-Arbeit).
+- `DailyReportService` — täglicher Bericht, **opt-in** via `IBKRTRADER_SUPERVISOR_DAILY` (Stunde 0–23).
+
+## S-4 MCP-Light
+`McpLightServer` exponiert dieselbe read-only Tool-Registry als lokalen MCP-Endpoint für externe Clients
+(z. B. Claude Code). **Opt-in** via `IBKRTRADER_MCP_PORT`, bindet nur `127.0.0.1`. Handler `McpJsonRpc`
+ist pur + unit-getestet (initialize/ping/tools.list/tools.call).
+
+## Architektur & Unterbringung
+Projekt `src/IBKRTrader.Modules.Supervisor/` als `IModule` (`Name="Supervisor"`, `DbPrefix="sup_"`),
+referenziert nur den Core. Eigenes Fenster mit Tabs: Analyse (Chat), Dossier-Browser, Berichte, Settings.
+
+## Sicherheit
+- **OpenRouter = bewusst freigegebener externer Datenempfänger.** Es werden nur Analyse-Daten der Tools
+  gesendet, niemals Secrets/Keys/Connection-Strings.
+- Separater API-Key (`IBKRTRADER_OPENROUTER_KEY` oder gitignorierte `openrouter.key`), getrennt von
+  künftigen Trading-Keys.
+- **Read-only by design** — kein Order-/Schreib-Tool. Prompt-Injection über Fremdtexte bleibt auf
+  „falsche Analyse" begrenzt, kann nie handeln.
+
+## Bewusst offen / Zielland-Arbeit
+- Counterfactual-Kursauflösung für Aktien (späterer Kurs) — Interface + Stub vorhanden.
+- Externer Versand des Tagesberichts (z. B. Threema) — heute nur Persistenz/Log.

scripts/provision-db.ps1

@@ -45,4 +45,12 @@ Write-Host "Wende CongressTradingDbContext-Migrationen an..." -ForegroundColor C
 dotnet ef database update --project src/IBKRTrader.Modules.CongressTrading --startup-project src/IBKRTrader.Modules.CongressTrading --context CongressTradingDbContext
 if ($LASTEXITCODE -ne 0) { Write-Error "CongressTradingDbContext-Migration fehlgeschlagen."; exit 1 }
 
+Write-Host "Wende AccountingDbContext-Migrationen an..." -ForegroundColor Cyan
+dotnet ef database update --project src/IBKRTrader.Modules.Accounting --startup-project src/IBKRTrader.Modules.Accounting --context AccountingDbContext
+if ($LASTEXITCODE -ne 0) { Write-Error "AccountingDbContext-Migration fehlgeschlagen."; exit 1 }
+
+Write-Host "Wende SupervisorDbContext-Migrationen an..." -ForegroundColor Cyan
+dotnet ef database update --project src/IBKRTrader.Modules.Supervisor --startup-project src/IBKRTrader.Modules.Supervisor --context SupervisorDbContext
+if ($LASTEXITCODE -ne 0) { Write-Error "SupervisorDbContext-Migration fehlgeschlagen."; exit 1 }
+
 Write-Host "DB-Provisioning abgeschlossen." -ForegroundColor Green

src/IBKRTrader.Core/Analytics/DossierBuilder.cs

@@ -0,0 +1,95 @@
+using System.Text;
+using System.Text.Json;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence.Entities;
+
+namespace IBKRTrader.Core.Analytics;
+
+/// <summary>
+/// Das komplette, rekonstruierte Bild zu einer <c>SignalId</c>: Entscheidungskette, Order-Events,
+/// gebuchte Trades und der zugehörige JSONL-Log-Auszug. Read-only zusammengesetzt.
+/// </summary>
+public sealed record TradeDossier(
+    string SignalId,
+    IReadOnlyList<CoreDecisionRecord>     Decisions,
+    IReadOnlyList<CoreOrderEvent>         OrderEvents,
+    IReadOnlyList<CoreTrade>              Trades,
+    IReadOnlyList<LogJson.ParsedLogLine>  LogLines);
+
+/// <summary>
+/// Reiner Zusammenbau + Rendering eines Dossiers (JSON fürs Modell, Markdown für Menschen). Keine I/O –
+/// die Beschaffung (DB-Queries, JSONL-Lesen) liegt im <c>DossierService</c> des Supervisor-Moduls.
+/// </summary>
+public static class DossierBuilder
+{
+    public static TradeDossier Build(
+        string signalId,
+        IEnumerable<CoreDecisionRecord> decisions,
+        IEnumerable<CoreOrderEvent> orderEvents,
+        IEnumerable<CoreTrade> trades,
+        IEnumerable<LogJson.ParsedLogLine> logLines) =>
+        new(signalId,
+            decisions.OrderBy(d => d.Timestamp).ToList(),
+            orderEvents.OrderBy(e => e.Timestamp).ToList(),
+            trades.OrderBy(t => t.TradedAt).ToList(),
+            logLines.OrderBy(l => l.Ts).ToList());
+
+    public static string ToMarkdown(TradeDossier d)
+    {
+        var sb = new StringBuilder();
+        sb.AppendLine($"# Dossier – Signal `{d.SignalId}`");
+        sb.AppendLine();
+
+        sb.AppendLine("## Entscheidungen");
+        if (d.Decisions.Count == 0) sb.AppendLine("_(keine)_");
+        foreach (var r in d.Decisions)
+            sb.AppendLine($"- {r.Timestamp:u} · **{r.Decision}** ({r.Reason}) · {r.Module} · {r.Side} {r.Symbol} @ {r.SignalPrice:F2} · {r.Message}");
+        sb.AppendLine();
+
+        sb.AppendLine("## Order-Events");
+        if (d.OrderEvents.Count == 0) sb.AppendLine("_(keine)_");
+        foreach (var e in d.OrderEvents)
+            sb.AppendLine($"- {e.Timestamp:u} · **{e.EventType}** · {e.Side} {e.Quantity}x {e.Symbol} @ {e.Price:F2} ({e.OrderType}) · {e.Response}");
+        sb.AppendLine();
+
+        sb.AppendLine("## Trades");
+        if (d.Trades.Count == 0) sb.AppendLine("_(keine)_");
+        foreach (var t in d.Trades)
+            sb.AppendLine($"- {t.TradedAt:u} · {t.Action} {t.Quantity}x {t.Symbol} @ {t.Price:F2} = {t.TotalValue:F2} · {t.Status}");
+        sb.AppendLine();
+
+        sb.AppendLine("## Log-Auszug");
+        if (d.LogLines.Count == 0) sb.AppendLine("_(keine passenden JSONL-Zeilen)_");
+        foreach (var l in d.LogLines)
+            sb.AppendLine($"- {l.Ts:u} [{l.Level}] {l.Source}: {l.Message}");
+
+        return sb.ToString();
+    }
+
+    public static string ToJson(TradeDossier d)
+    {
+        var payload = new
+        {
+            signalId = d.SignalId,
+            decisions = d.Decisions.Select(r => new
+            {
+                ts = r.Timestamp, r.Module, r.Symbol, r.Side, price = r.SignalPrice,
+                decision = r.Decision.ToString(), reason = r.Reason.ToString(), r.Message, ctx = r.ContextJson
+            }),
+            orderEvents = d.OrderEvents.Select(e => new
+            {
+                ts = e.Timestamp, e.Module, e.Symbol, eventType = e.EventType.ToString(),
+                e.Side, e.Price, e.Quantity, e.OrderType, e.Response, details = e.DetailsJson
+            }),
+            trades = d.Trades.Select(t => new
+            {
+                ts = t.TradedAt, t.Module, t.Symbol, t.Action, t.Quantity, t.Price, t.TotalValue, t.Status
+            }),
+            logLines = d.LogLines.Select(l => new { ts = l.Ts, l.Level, l.Source, l.Message })
+        };
+        return JsonSerializer.Serialize(payload, new JsonSerializerOptions
+        {
+            Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping
+        });
+    }
+}

src/IBKRTrader.Core/Analytics/RealizedPnlEngine.cs

@@ -0,0 +1,81 @@
+using IBKRTrader.Core.Persistence.Entities;
+
+namespace IBKRTrader.Core.Analytics;
+
+/// <summary>
+/// Ein geschlossener (realisierter) Teil-Trade: eine SELL-Menge, gegen ihre FIFO-gematchten BUY-Lots
+/// abgerechnet. Aus den Fills der <c>core_trade_history</c> rein rechnerisch abgeleitet.
+/// </summary>
+public sealed record RealizedTrade(
+    string   Module,
+    string   Symbol,
+    decimal  Quantity,
+    decimal  BuyPrice,
+    decimal  SellPrice,
+    DateTime OpenedAt,
+    DateTime ClosedAt)
+{
+    /// <summary>Realisierte GuV dieser Menge (Erlös − Einstand); Fees sind hier nicht berücksichtigt.</summary>
+    public decimal RealizedPnl => (SellPrice - BuyPrice) * Quantity;
+}
+
+/// <summary>
+/// Reines, seiteneffektfreies FIFO-Lot-Matching über Fills (BUY öffnet Lots, SELL realisiert gegen die
+/// ältesten offenen Lots) — je (Modul, Symbol). Grundlage sowohl für die Supervisor-KPIs
+/// (<see cref="TradeAnalytics"/>) als auch für die realisierte GuV im Accounting-Modul (kein Duplikat).
+/// Geldkritisch → unit-getestet. Long-only-Sicht: SELL-Mengen ohne passendes offenes Lot werden
+/// ignoriert (kein Leerverkauf modelliert).
+/// </summary>
+public static class RealizedPnlEngine
+{
+    private sealed class Lot
+    {
+        public decimal  Quantity;
+        public decimal  Price;
+        public DateTime OpenedAt;
+    }
+
+    /// <summary>Matcht alle Fills zu realisierten Teil-Trades (chronologisch, FIFO je Modul+Symbol).</summary>
+    public static IReadOnlyList<RealizedTrade> Match(IEnumerable<CoreTrade> fills)
+    {
+        var result = new List<RealizedTrade>();
+
+        var groups = fills
+            .GroupBy(f => (f.Module, f.Symbol));
+
+        foreach (var g in groups)
+        {
+            var open = new Queue<Lot>();
+            foreach (var f in g.OrderBy(x => x.TradedAt).ThenBy(x => x.Id))
+            {
+                bool isBuy = string.Equals(f.Action, "BUY", StringComparison.OrdinalIgnoreCase);
+                if (isBuy)
+                {
+                    open.Enqueue(new Lot { Quantity = f.Quantity, Price = f.Price, OpenedAt = f.TradedAt });
+                    continue;
+                }
+
+                // SELL: gegen die ältesten offenen Lots abrechnen.
+                decimal remaining = f.Quantity;
+                while (remaining > 0 && open.Count > 0)
+                {
+                    var lot = open.Peek();
+                    decimal matched = Math.Min(remaining, lot.Quantity);
+                    result.Add(new RealizedTrade(
+                        g.Key.Module, g.Key.Symbol, matched, lot.Price, f.Price, lot.OpenedAt, f.TradedAt));
+
+                    lot.Quantity -= matched;
+                    remaining    -= matched;
+                    if (lot.Quantity <= 0) open.Dequeue();
+                }
+                // Überschüssige SELL-Menge ohne offenes Lot: ignoriert (kein Short modelliert).
+            }
+        }
+
+        return result;
+    }
+
+    /// <summary>Summe der realisierten GuV über alle gematchten Teil-Trades.</summary>
+    public static decimal TotalRealized(IEnumerable<CoreTrade> fills) =>
+        Match(fills).Sum(t => t.RealizedPnl);
+}

src/IBKRTrader.Core/Analytics/TradeAnalytics.cs

@@ -0,0 +1,47 @@
+using IBKRTrader.Core.Persistence.Entities;
+
+namespace IBKRTrader.Core.Analytics;
+
+/// <summary>Kennzahlen über realisierte Trades.</summary>
+public sealed record Kpis(
+    int     TradeCount,
+    decimal NetPnl,
+    double  WinRatePct,
+    decimal AvgPnlPerTrade,
+    double  ProfitFactor);
+
+/// <summary>GuV-Aufteilung nach einem Schlüssel (z. B. Modul).</summary>
+public sealed record PnlBucket(string Key, decimal Pnl, int Count);
+
+/// <summary>
+/// Reine KPI-Berechnung über die Fills der <c>core_trade_history</c>: erst FIFO-Realisierung
+/// (<see cref="RealizedPnlEngine"/>), dann Aggregat. Genutzt von den Supervisor-Tools (get_kpis).
+/// </summary>
+public static class TradeAnalytics
+{
+    public static Kpis ComputeKpis(IEnumerable<CoreTrade> fills)
+    {
+        var realized = RealizedPnlEngine.Match(fills);
+        int count = realized.Count;
+        if (count == 0) return new Kpis(0, 0m, 0d, 0m, 0d);
+
+        decimal net = realized.Sum(t => t.RealizedPnl);
+        int winners = realized.Count(t => t.RealizedPnl > 0);
+        decimal grossProfit = realized.Where(t => t.RealizedPnl > 0).Sum(t => t.RealizedPnl);
+        decimal grossLoss   = Math.Abs(realized.Where(t => t.RealizedPnl < 0).Sum(t => t.RealizedPnl));
+
+        double winRate = 100d * winners / count;
+        double profitFactor = grossLoss == 0m ? (grossProfit > 0m ? double.PositiveInfinity : 0d)
+                                              : (double)(grossProfit / grossLoss);
+
+        return new Kpis(count, net, winRate, net / count, profitFactor);
+    }
+
+    /// <summary>Realisierte GuV je Modul (absteigend nach GuV).</summary>
+    public static IReadOnlyList<PnlBucket> PnlByModule(IEnumerable<CoreTrade> fills) =>
+        RealizedPnlEngine.Match(fills)
+            .GroupBy(t => t.Module)
+            .Select(g => new PnlBucket(g.Key, g.Sum(t => t.RealizedPnl), g.Count()))
+            .OrderByDescending(b => b.Pnl)
+            .ToList();
+}

src/IBKRTrader.Core/Logging/LogJson.cs

@@ -0,0 +1,59 @@
+using System.Text;
+using System.Text.Json;
+
+namespace IBKRTrader.Core.Logging;
+
+/// <summary>
+/// Pure, seiteneffektfreie (De-)Serialisierung einer JSONL-Log-Zeile. JSONL (eine JSON-Zeile je Event)
+/// ist append-fähig, streambar und zeilenweise filterbar – KI-freundlich und effizient. Die eigentliche
+/// Datei-I/O liegt im <see cref="LoggingService"/>; hier nur das Format, damit es unit-getestet werden
+/// kann (Round-Trip). Feldnamen bewusst kurz: ts, level, source, cid, message.
+/// </summary>
+public static class LogJson
+{
+    private static readonly JsonSerializerOptions Opts = new()
+    {
+        Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping
+    };
+
+    /// <summary>Eine geparste JSONL-Zeile (Beiwerk – fehlende/kaputte Zeilen liefern null).</summary>
+    public sealed record ParsedLogLine(DateTime Ts, string Level, string Source, string? Cid, string Message);
+
+    /// <summary>Serialisiert ein Log-Event zu genau einer JSON-Zeile (ohne Zeilenumbruch).</summary>
+    public static string WriteLine(DateTime ts, AppLogLevel level, string source, string message, string? cid)
+    {
+        using var ms = new MemoryStream();
+        using (var w = new Utf8JsonWriter(ms))
+        {
+            w.WriteStartObject();
+            w.WriteString("ts", ts.ToUniversalTime().ToString("O"));
+            w.WriteString("level", level.ToString());
+            w.WriteString("source", source ?? "");
+            if (!string.IsNullOrEmpty(cid)) w.WriteString("cid", cid);
+            w.WriteString("message", message ?? "");
+            w.WriteEndObject();
+        }
+        return Encoding.UTF8.GetString(ms.ToArray());
+    }
+
+    /// <summary>Parst eine JSONL-Zeile. Gibt null zurück, wenn die Zeile leer oder kein gültiges JSON ist.</summary>
+    public static ParsedLogLine? ParseLine(string? line)
+    {
+        if (string.IsNullOrWhiteSpace(line)) return null;
+        try
+        {
+            using var doc = JsonDocument.Parse(line);
+            var r = doc.RootElement;
+            DateTime ts = r.TryGetProperty("ts", out var tsp) && tsp.TryGetDateTime(out var d) ? d : default;
+            string level = r.TryGetProperty("level", out var lp) ? lp.GetString() ?? "" : "";
+            string source = r.TryGetProperty("source", out var sp) ? sp.GetString() ?? "" : "";
+            string? cid = r.TryGetProperty("cid", out var cp) ? cp.GetString() : null;
+            string msg = r.TryGetProperty("message", out var mp) ? mp.GetString() ?? "" : "";
+            return new ParsedLogLine(ts, level, source, cid, msg);
+        }
+        catch (JsonException)
+        {
+            return null;
+        }
+    }
+}

src/IBKRTrader.Core/Logging/LoggingService.cs

@@ -11,7 +11,8 @@ public class LoggingService
 {
     private RichTextBox? _rtb;
     private AppLogLevel  _minLevel = AppLogLevel.Info;
-    private readonly object _fileLock = new();
+    private readonly object _fileLock  = new();
+    private readonly object _jsonlLock = new();
 
     private static readonly string LogBaseDir =
         Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Logs");
@@ -33,11 +34,23 @@ public class LoggingService
     public void Error(string module, string message, Exception? ex = null)
         => Write(AppLogLevel.Error, module, message, ex);
 
-    public void Write(AppLogLevel level, string module, string message, Exception? ex = null)
+    // Überladungen mit CorrelationId (SignalId) – schreiben zusätzlich strukturiert ins JSONL,
+    // sodass der Supervisor die komplette Kette „alles zu diesem Signal" filtern kann.
+    public void Info (string module, string message, string? cid, Exception? ex = null)
+        => Write(AppLogLevel.Info,  module, message, ex, cid);
+
+    public void Warn (string module, string message, string? cid, Exception? ex = null)
+        => Write(AppLogLevel.Warn,  module, message, ex, cid);
+
+    public void Error(string module, string message, string? cid, Exception? ex = null)
+        => Write(AppLogLevel.Error, module, message, ex, cid);
+
+    public void Write(AppLogLevel level, string module, string message, Exception? ex = null, string? cid = null)
     {
         if (level < _minLevel) return;
         var entry = new LogEntry(DateTime.Now, level, module, message, ex);
         WriteToFile(entry);
+        WriteToJsonl(entry, cid);
         WriteToRtb(entry);
     }
 
@@ -61,6 +74,27 @@ public class LoggingService
         catch { /* Logging darf niemals abstürzen */ }
     }
 
+    // ─── JSONL (KI-freundlicher Zweit-Sink) ─────────────────────────────────────
+
+    /// <summary>
+    /// Schreibt zusätzlich eine JSON-Zeile nach Logs\{yyyy-MM-dd}.jsonl (Dual-Sink). Zeilenweise
+    /// filter-/parsebar (Datum/Level/Quelle/Text/CorrelationId) – Grundlage für Log Viewer + Supervisor.
+    /// </summary>
+    private void WriteToJsonl(LogEntry e, string? cid)
+    {
+        try
+        {
+            Directory.CreateDirectory(LogBaseDir);
+            var file = Path.Combine(LogBaseDir, $"{e.Timestamp:yyyy-MM-dd}.jsonl");
+            var message = e.Exception != null ? $"{e.Message} | {e.Exception.Message}" : e.Message;
+            var json = LogJson.WriteLine(e.Timestamp, e.Level, e.Module, message, cid);
+
+            lock (_jsonlLock)
+                File.AppendAllText(file, json + "\n");
+        }
+        catch { /* Logging darf niemals abstürzen */ }
+    }
+
     // ─── RichTextBox ──────────────────────────────────────────────────────────
 
     private static readonly Color ColorInfo  = Color.FromArgb(150, 210, 150);

src/IBKRTrader.Core/Persistence/Ef/CoreDbContext.cs

@@ -18,6 +18,10 @@ public class CoreDbContext : DbContext
     public DbSet<CoreWorkerLog> WorkerLog    => Set<CoreWorkerLog>();
     public DbSet<CoreSetting>   Settings     => Set<CoreSetting>();
 
+    // Datenfundament für Analyse/Forensik (Supervisor)
+    public DbSet<CoreDecisionRecord> DecisionJournal => Set<CoreDecisionRecord>();
+    public DbSet<CoreOrderEvent>     OrderEvents     => Set<CoreOrderEvent>();
+
     // IBKR-Marktdaten
     public DbSet<IBKRInstrument>          Instruments => Set<IBKRInstrument>();
     public DbSet<IBKRMarketBar>           MarketBars  => Set<IBKRMarketBar>();
@@ -41,6 +45,7 @@ public class CoreDbContext : DbContext
             e.Property(x => x.Module).HasMaxLength(50);
             e.Property(x => x.Symbol).HasMaxLength(20);
             e.Property(x => x.Action).HasMaxLength(10);
+            e.Property(x => x.SignalId).HasMaxLength(64);
             e.Property(x => x.IbkrOrderId).HasMaxLength(100);
             e.Property(x => x.Status).HasMaxLength(50);
             e.Property(x => x.Quantity).HasPrecision(18, 4);
@@ -48,6 +53,7 @@ public class CoreDbContext : DbContext
             e.Property(x => x.TotalValue).HasPrecision(18, 4);
             e.HasIndex(x => x.Symbol);
             e.HasIndex(x => x.Module);
+            e.HasIndex(x => x.SignalId);
         });
 
         b.Entity<CoreBudget>(e =>
@@ -119,5 +125,39 @@ public class CoreDbContext : DbContext
             e.Property(x => x.Source).HasMaxLength(50);
             e.Property(x => x.Ticker).HasMaxLength(50);
         });
+
+        b.Entity<CoreDecisionRecord>(e =>
+        {
+            e.ToTable("core_decision_journal");
+            e.HasKey(x => x.Id);
+            e.Property(x => x.SignalId).HasMaxLength(64);
+            e.Property(x => x.Module).HasMaxLength(50);
+            e.Property(x => x.Symbol).HasMaxLength(20);
+            e.Property(x => x.Side).HasMaxLength(10);
+            e.Property(x => x.SignalPrice).HasPrecision(18, 4);
+            e.Property(x => x.Decision).HasConversion<string>().HasMaxLength(20);
+            e.Property(x => x.Reason).HasConversion<string>().HasMaxLength(40);
+            e.Property(x => x.ContextJson).HasColumnType("text");
+            e.Property(x => x.Message).HasColumnType("text");
+            e.HasIndex(x => x.SignalId);
+            e.HasIndex(x => new { x.Module, x.Timestamp });
+        });
+
+        b.Entity<CoreOrderEvent>(e =>
+        {
+            e.ToTable("core_order_events");
+            e.HasKey(x => x.Id);
+            e.Property(x => x.SignalId).HasMaxLength(64);
+            e.Property(x => x.Module).HasMaxLength(50);
+            e.Property(x => x.Symbol).HasMaxLength(20);
+            e.Property(x => x.Side).HasMaxLength(10);
+            e.Property(x => x.OrderType).HasMaxLength(20);
+            e.Property(x => x.Price).HasPrecision(18, 4);
+            e.Property(x => x.EventType).HasConversion<string>().HasMaxLength(20);
+            e.Property(x => x.Response).HasColumnType("text");
+            e.Property(x => x.DetailsJson).HasColumnType("text");
+            e.HasIndex(x => x.SignalId);
+            e.HasIndex(x => new { x.Symbol, x.Timestamp });
+        });
     }
 }

src/IBKRTrader.Core/Persistence/Ef/EfAnalysisJournals.cs

@@ -0,0 +1,84 @@
+using System.Linq.Expressions;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace IBKRTrader.Core.Persistence.Ef;
+
+/// <summary>
+/// EF-Implementierung des Entscheidungsjournals. <see cref="Write"/> ist bewusst fehlertolerant:
+/// ein Journal-/DB-Fehler darf den Geld-Pfad (ExecutionService) niemals brechen – er wird geloggt
+/// und verworfen. Kurzlebiger DbContext je Operation (thread-safe über die Factory).
+/// </summary>
+public sealed class EfDecisionJournal : IDecisionJournal
+{
+    private readonly IDbContextFactory<CoreDbContext> _dbf;
+    private readonly LoggingService                   _logger;
+
+    public EfDecisionJournal(IDbContextFactory<CoreDbContext> dbf, LoggingService logger)
+    {
+        _dbf    = dbf;
+        _logger = logger;
+    }
+
+    public void Write(CoreDecisionRecord record)
+    {
+        try
+        {
+            using var db = _dbf.CreateDbContext();
+            db.DecisionJournal.Add(record);
+            db.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _logger.Warn("Core", $"DecisionJournal-Write fehlgeschlagen (ignoriert): {ex.Message}");
+        }
+    }
+
+    public List<CoreDecisionRecord> Query(Expression<Func<CoreDecisionRecord, bool>> predicate, int limit = 1000)
+    {
+        using var db = _dbf.CreateDbContext();
+        return db.DecisionJournal.AsNoTracking()
+            .Where(predicate)
+            .OrderByDescending(r => r.Timestamp)
+            .Take(limit)
+            .ToList();
+    }
+}
+
+/// <summary>EF-Implementierung des Order-Lifecycle-Logs (gleiche Robustheits-Garantie).</summary>
+public sealed class EfOrderEventLog : IOrderEventLog
+{
+    private readonly IDbContextFactory<CoreDbContext> _dbf;
+    private readonly LoggingService                   _logger;
+
+    public EfOrderEventLog(IDbContextFactory<CoreDbContext> dbf, LoggingService logger)
+    {
+        _dbf    = dbf;
+        _logger = logger;
+    }
+
+    public void Write(CoreOrderEvent record)
+    {
+        try
+        {
+            using var db = _dbf.CreateDbContext();
+            db.OrderEvents.Add(record);
+            db.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _logger.Warn("Core", $"OrderEvent-Write fehlgeschlagen (ignoriert): {ex.Message}");
+        }
+    }
+
+    public List<CoreOrderEvent> Query(Expression<Func<CoreOrderEvent, bool>> predicate, int limit = 1000)
+    {
+        using var db = _dbf.CreateDbContext();
+        return db.OrderEvents.AsNoTracking()
+            .Where(predicate)
+            .OrderByDescending(r => r.Timestamp)
+            .Take(limit)
+            .ToList();
+    }
+}

src/IBKRTrader.Core/Persistence/Ef/Migrations/20260730164359_AddAnalysisFoundation.Designer.cs

@@ -0,0 +1,484 @@
+// <auto-generated />
+using System;
+using IBKRTrader.Core.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace IBKRTrader.Core.Persistence.Ef.Migrations
+{
+    [DbContext(typeof(CoreDbContext))]
+    [Migration("20260730164359_AddAnalysisFoundation")]
+    partial class AddAnalysisFoundation
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.13")
+                .HasAnnotation("Relational:MaxIdentifierLength", 64);
+
+            MySqlModelBuilderExtensions.AutoIncrementColumns(modelBuilder);
+
+            modelBuilder.Entity("IBKRTrader.Core.IBKR.IBKRExternalIdentifier", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<long>("InstrumentId")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("Source")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("Ticker")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Source", "Ticker");
+
+                    b.HasIndex("InstrumentId", "Source", "Ticker")
+                        .IsUnique();
+
+                    b.ToTable("core_ibkr_external_identifiers", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Core.IBKR.IBKRInstrument", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<bool>("Active")
+                        .HasColumnType("tinyint(1)");
+
+                    b.Property<string>("CompanyName")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("Currency")
+                        .IsRequired()
+                        .HasMaxLength(5)
+                        .HasColumnType("varchar(5)");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Exchange")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<long>("IbkrConid")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("Industry")
+                        .HasMaxLength(100)
+                        .HasColumnType("varchar(100)");
+
+                    b.Property<string>("Isin")
+                        .HasMaxLength(12)
+                        .HasColumnType("varchar(12)");
+
+                    b.Property<DateTime?>("LastFetched")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("PrimaryExchange")
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("SecType")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("Sector")
+                        .HasMaxLength(100)
+                        .HasColumnType("varchar(100)");
+
+                    b.Property<string>("Symbol")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Active");
+
+                    b.HasIndex("IbkrConid")
+                        .IsUnique();
+
+                    b.HasIndex("Symbol");
+
+                    b.ToTable("core_ibkr_instruments", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Core.IBKR.IBKRMarketBar", b =>
+                {
+                    b.Property<long>("InstrumentId")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("BarSize")
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<DateTime>("Timestamp")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<int?>("BarCount")
+                        .HasColumnType("int");
+
+                    b.Property<decimal>("Close")
+                        .HasPrecision(12, 6)
+                        .HasColumnType("decimal(12,6)");
+
+                    b.Property<decimal>("High")
+                        .HasPrecision(12, 6)
+                        .HasColumnType("decimal(12,6)");
+
+                    b.Property<decimal>("Low")
+                        .HasPrecision(12, 6)
+                        .HasColumnType("decimal(12,6)");
+
+                    b.Property<decimal>("Open")
+                        .HasPrecision(12, 6)
+                        .HasColumnType("decimal(12,6)");
+
+                    b.Property<long>("Volume")
+                        .HasColumnType("bigint");
+
+                    b.Property<decimal?>("Wap")
+                        .HasPrecision(12, 6)
+                        .HasColumnType("decimal(12,6)");
+
+                    b.HasKey("InstrumentId", "BarSize", "Timestamp");
+
+                    b.HasIndex("Timestamp");
+
+                    b.ToTable("core_ibkr_market_data", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Core.Persistence.Entities.CoreBudget", b =>
+                {
+                    b.Property<string>("Module")
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<decimal>("MaxPerTrade")
+                        .HasPrecision(18, 2)
+                        .HasColumnType("decimal(18,2)");
+
+                    b.Property<decimal>("TotalBudget")
+                        .HasPrecision(18, 2)
+                        .HasColumnType("decimal(18,2)");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<decimal>("UsedBudget")
+                        .HasPrecision(18, 2)
+                        .HasColumnType("decimal(18,2)");
+
+                    b.HasKey("Module");
+
+                    b.ToTable("core_budget", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Core.Persistence.Entities.CoreDecisionRecord", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("ContextJson")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Decision")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("Message")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Module")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("Reason")
+                        .IsRequired()
+                        .HasMaxLength(40)
+                        .HasColumnType("varchar(40)");
+
+                    b.Property<string>("Side")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("SignalId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)");
+
+                    b.Property<decimal>("SignalPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<string>("Symbol")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<DateTime>("Timestamp")
+                        .HasColumnType("datetime(6)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SignalId");
+
+                    b.HasIndex("Module", "Timestamp");
+
+                    b.ToTable("core_decision_journal", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Core.Persistence.Entities.CoreOrderEvent", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("DetailsJson")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("EventType")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("Module")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("OrderType")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<decimal>("Price")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<int>("Quantity")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Response")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Side")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("SignalId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)");
+
+                    b.Property<string>("Symbol")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<DateTime>("Timestamp")
+                        .HasColumnType("datetime(6)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SignalId");
+
+                    b.HasIndex("Symbol", "Timestamp");
+
+                    b.ToTable("core_order_events", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Core.Persistence.Entities.CorePosition", b =>
+                {
+                    b.Property<string>("Module")
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("Symbol")
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<decimal>("AvgPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<int>("Quantity")
+                        .HasColumnType("int");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.HasKey("Module", "Symbol");
+
+                    b.ToTable("core_position", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Core.Persistence.Entities.CoreSetting", b =>
+                {
+                    b.Property<string>("Key")
+                        .HasMaxLength(100)
+                        .HasColumnType("varchar(100)");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("text");
+
+                    b.HasKey("Key");
+
+                    b.ToTable("core_settings", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Core.Persistence.Entities.CoreTrade", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("Action")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("IbkrOrderId")
+                        .HasMaxLength(100)
+                        .HasColumnType("varchar(100)");
+
+                    b.Property<string>("Module")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("Notes")
+                        .HasColumnType("longtext");
+
+                    b.Property<decimal>("Price")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<decimal>("Quantity")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<string>("SignalId")
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)");
+
+                    b.Property<string>("Status")
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("Symbol")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<decimal>("TotalValue")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<DateTime>("TradedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Module");
+
+                    b.HasIndex("SignalId");
+
+                    b.HasIndex("Symbol");
+
+                    b.ToTable("core_trade_history", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Core.Persistence.Entities.CoreWorkerLog", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime?>("FinishedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("Message")
+                        .HasColumnType("longtext");
+
+                    b.Property<string>("Module")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<DateTime?>("StartedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("Status")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("WorkerName")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("varchar(100)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerName", "StartedAt");
+
+                    b.ToTable("core_worker_log", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

src/IBKRTrader.Core/Persistence/Ef/Migrations/20260730164359_AddAnalysisFoundation.cs

@@ -0,0 +1,130 @@
+using System;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace IBKRTrader.Core.Persistence.Ef.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddAnalysisFoundation : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "SignalId",
+                table: "core_trade_history",
+                type: "varchar(64)",
+                maxLength: 64,
+                nullable: true)
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "core_decision_journal",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    Timestamp = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    SignalId = table.Column<string>(type: "varchar(64)", maxLength: 64, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Module = table.Column<string>(type: "varchar(50)", maxLength: 50, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Symbol = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Side = table.Column<string>(type: "varchar(10)", maxLength: 10, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    SignalPrice = table.Column<decimal>(type: "decimal(18,4)", precision: 18, scale: 4, nullable: false),
+                    Decision = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Reason = table.Column<string>(type: "varchar(40)", maxLength: 40, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    ContextJson = table.Column<string>(type: "text", nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Message = table.Column<string>(type: "text", nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_core_decision_journal", x => x.Id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "core_order_events",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    Timestamp = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    SignalId = table.Column<string>(type: "varchar(64)", maxLength: 64, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Module = table.Column<string>(type: "varchar(50)", maxLength: 50, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Symbol = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    EventType = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Side = table.Column<string>(type: "varchar(10)", maxLength: 10, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Price = table.Column<decimal>(type: "decimal(18,4)", precision: 18, scale: 4, nullable: false),
+                    Quantity = table.Column<int>(type: "int", nullable: false),
+                    OrderType = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Response = table.Column<string>(type: "text", nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    DetailsJson = table.Column<string>(type: "text", nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_core_order_events", x => x.Id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_core_trade_history_SignalId",
+                table: "core_trade_history",
+                column: "SignalId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_core_decision_journal_Module_Timestamp",
+                table: "core_decision_journal",
+                columns: new[] { "Module", "Timestamp" });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_core_decision_journal_SignalId",
+                table: "core_decision_journal",
+                column: "SignalId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_core_order_events_SignalId",
+                table: "core_order_events",
+                column: "SignalId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_core_order_events_Symbol_Timestamp",
+                table: "core_order_events",
+                columns: new[] { "Symbol", "Timestamp" });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "core_decision_journal");
+
+            migrationBuilder.DropTable(
+                name: "core_order_events");
+
+            migrationBuilder.DropIndex(
+                name: "IX_core_trade_history_SignalId",
+                table: "core_trade_history");
+
+            migrationBuilder.DropColumn(
+                name: "SignalId",
+                table: "core_trade_history");
+        }
+    }
+}

src/IBKRTrader.Core/Persistence/Ef/Migrations/CoreDbContextModelSnapshot.cs

@@ -201,6 +201,133 @@ namespace IBKRTrader.Core.Persistence.Ef.Migrations
                     b.ToTable("core_budget", (string)null);
                 });
 
+            modelBuilder.Entity("IBKRTrader.Core.Persistence.Entities.CoreDecisionRecord", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("ContextJson")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Decision")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("Message")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Module")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("Reason")
+                        .IsRequired()
+                        .HasMaxLength(40)
+                        .HasColumnType("varchar(40)");
+
+                    b.Property<string>("Side")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("SignalId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)");
+
+                    b.Property<decimal>("SignalPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<string>("Symbol")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<DateTime>("Timestamp")
+                        .HasColumnType("datetime(6)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SignalId");
+
+                    b.HasIndex("Module", "Timestamp");
+
+                    b.ToTable("core_decision_journal", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Core.Persistence.Entities.CoreOrderEvent", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("DetailsJson")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("EventType")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("Module")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("OrderType")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<decimal>("Price")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<int>("Quantity")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Response")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Side")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("SignalId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)");
+
+                    b.Property<string>("Symbol")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<DateTime>("Timestamp")
+                        .HasColumnType("datetime(6)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SignalId");
+
+                    b.HasIndex("Symbol", "Timestamp");
+
+                    b.ToTable("core_order_events", (string)null);
+                });
+
             modelBuilder.Entity("IBKRTrader.Core.Persistence.Entities.CorePosition", b =>
                 {
                     b.Property<string>("Module")
@@ -279,6 +406,10 @@ namespace IBKRTrader.Core.Persistence.Ef.Migrations
                         .HasPrecision(18, 4)
                         .HasColumnType("decimal(18,4)");
 
+                    b.Property<string>("SignalId")
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)");
+
                     b.Property<string>("Status")
                         .HasMaxLength(50)
                         .HasColumnType("varchar(50)");
@@ -299,6 +430,8 @@ namespace IBKRTrader.Core.Persistence.Ef.Migrations
 
                     b.HasIndex("Module");
 
+                    b.HasIndex("SignalId");
+
                     b.HasIndex("Symbol");
 
                     b.ToTable("core_trade_history", (string)null);

src/IBKRTrader.Core/Persistence/Entities/AnalysisEntities.cs

@@ -0,0 +1,100 @@
+namespace IBKRTrader.Core.Persistence.Entities;
+
+/// <summary>Ausgang einer Handelsentscheidung im Entscheidungsjournal.</summary>
+public enum TradeDecision
+{
+    Executed,   // Aktion ausgeführt (Order platziert)
+    Rejected,   // aktiv abgelehnt (Risiko-/Plausibilitätsregel)
+    Skipped,    // bewusst übersprungen (z. B. Trading global aus, kein Kurs)
+    Failed      // versucht, aber fehlgeschlagen (z. B. Order-Fehler)
+}
+
+/// <summary>
+/// Strukturierter Grund einer Entscheidung (statt Freitext). Als STRING persistiert – neue Werte können
+/// gefahrlos ergänzt werden. Deckt die heutigen Verzweigungen im <c>ExecutionService</c> ab und lässt
+/// Raum für künftige Modul-/Risiko-Regeln. Vorbild: PolytraderSharp <c>DecisionReason</c>.
+/// </summary>
+public enum DecisionReason
+{
+    None = 0,
+
+    // ----- Modus / Zustand -----
+    TradingDisabled,          // globaler Hauptschalter aus
+    NoQuote,                  // kein Kurs für das Symbol verfügbar
+
+    // ----- Risiko / Sizing -----
+    RiskRejected,             // Risikoprüfung abgelehnt (Grund im Message-/ContextJson)
+    PositionLimitReached,     // Modul-/Positions-Limit erreicht
+    MaxSlippageExceeded,      // Abweichung Limit ↔ Kurs zu groß
+    InsufficientFunds,        // verfügbares Guthaben reicht nicht
+    DuplicateOrder,           // bereits offene/gleiche Order
+
+    // ----- Ausführung -----
+    OrderPlaced,              // Order erfolgreich platziert
+    OrderFailed               // Broker/Order-Fehler beim Platzieren
+}
+
+/// <summary>Art eines Order-Lifecycle-Ereignisses (als String persistiert – erweiterbar).</summary>
+public enum OrderEventType
+{
+    Placed,             // Order an den Broker gesendet, Ergebnis in Response
+    PlaceFailed,        // Platzierung fehlgeschlagen
+    Filled,             // vollständig ausgeführt
+    PartiallyFilled,    // teilweise ausgeführt
+    Cancelled           // storniert (Grund in DetailsJson)
+}
+
+/// <summary>
+/// Eine Zeile im Entscheidungsjournal (core_decision_journal): JEDE Handelsentscheidung –
+/// ausgeführt, abgelehnt oder übersprungen – strukturiert und abfragbar. Grundlage für
+/// Supervisor-Analysen („warum (nicht) gehandelt?"). Siehe docs/konzepte/KONZEPT-Modul-Supervisor.md.
+/// </summary>
+public class CoreDecisionRecord
+{
+    public long     Id          { get; set; }
+    public DateTime Timestamp   { get; set; } = DateTime.UtcNow;
+
+    /// <summary>Korrelation: verbindet Signal → Entscheidung(en) → Order(s) → Trade.</summary>
+    public string   SignalId    { get; set; } = "";
+
+    public string   Module      { get; set; } = "";
+    public string   Symbol      { get; set; } = "";
+    public string   Side        { get; set; } = "";   // BUY / SELL
+    public decimal  SignalPrice { get; set; }
+
+    public TradeDecision  Decision { get; set; }
+    public DecisionReason Reason   { get; set; }
+
+    /// <summary>Kompakte Kontext-Zahlen als JSON (Limitwerte, Budgets, berechnete Größen …).</summary>
+    public string ContextJson { get; set; } = "";
+
+    /// <summary>Menschlicher Begründungstext (wie bisher im Log).</summary>
+    public string Message     { get; set; } = "";
+}
+
+/// <summary>
+/// Ein Order-Lifecycle-Ereignis (core_order_events): Platzierungen, Broker-Antworten, Cancels – als
+/// Daten statt nur als Log. Zusammen mit dem Entscheidungsjournal ergibt das die rekonstruierbare Kette
+/// je Signal (Dossier).
+/// </summary>
+public class CoreOrderEvent
+{
+    public long     Id        { get; set; }
+    public DateTime Timestamp { get; set; } = DateTime.UtcNow;
+
+    public string   SignalId  { get; set; } = "";
+    public string   Module    { get; set; } = "";
+    public string   Symbol    { get; set; } = "";
+
+    public OrderEventType EventType { get; set; }
+    public string   Side      { get; set; } = "";   // BUY / SELL
+    public decimal  Price     { get; set; }
+    public int      Quantity  { get; set; }
+    public string   OrderType { get; set; } = "";   // Market / Limit
+
+    /// <summary>Broker-Antwort ("OK" oder Fehlertext) bzw. Ergebnis der Aktion.</summary>
+    public string   Response  { get; set; } = "";
+
+    /// <summary>Zusatzkontext als kompaktes JSON (z. B. Fill-Preis, Teilmenge, Grund).</summary>
+    public string   DetailsJson { get; set; } = "";
+}

src/IBKRTrader.Core/Persistence/Entities/CoreEntities.cs

@@ -21,6 +21,8 @@ public class CoreTrade
     public decimal   Price       { get; set; }
     public decimal   TotalValue  { get; set; }
     public DateTime  TradedAt    { get; set; }
+    /// <summary>Korrelation zu Entscheidungsjournal/Order-Events (leer für Trades ohne Signal-Kette).</summary>
+    public string?   SignalId    { get; set; }
     public string?   IbkrOrderId { get; set; }
     public string?   Status      { get; set; }
     public string?   Notes       { get; set; }

src/IBKRTrader.Core/Persistence/IAnalysisJournals.cs

@@ -0,0 +1,21 @@
+using System.Linq.Expressions;
+using IBKRTrader.Core.Persistence.Entities;
+
+namespace IBKRTrader.Core.Persistence;
+
+/// <summary>
+/// Entscheidungsjournal (core_decision_journal). <see cref="Write"/> darf den Trading-Pfad NIEMALS
+/// brechen – Implementierungen fangen Persistenzfehler ab (Log statt Exception).
+/// </summary>
+public interface IDecisionJournal
+{
+    void Write(CoreDecisionRecord record);
+    List<CoreDecisionRecord> Query(Expression<Func<CoreDecisionRecord, bool>> predicate, int limit = 1000);
+}
+
+/// <summary>Order-Lifecycle-Log (core_order_events). Gleiche Robustheits-Garantie wie das Journal.</summary>
+public interface IOrderEventLog
+{
+    void Write(CoreOrderEvent record);
+    List<CoreOrderEvent> Query(Expression<Func<CoreOrderEvent, bool>> predicate, int limit = 1000);
+}

src/IBKRTrader.Core/Settings/AppSettings.cs

@@ -214,6 +214,53 @@ public class TradingSettings
     public override string ToString() => $"{Mode} – {(TradingEnabled ? "aktiv" : "inaktiv")}";
 }
 
+// ─── Accounting ──────────────────────────────────────────────────────────────
+
+[TypeConverter(typeof(ExpandableObjectConverter))]
+public class AccountingSettings
+{
+    [Category("Accounting")]
+    [DisplayName("Basiswährung")]
+    [Description("Kontobasiswährung für die Abrechnung (Standard: USD)")]
+    public string BaseCurrency { get; set; } = "USD";
+
+    [Category("Accounting")]
+    [DisplayName("Ingest-Intervall (Stunden)")]
+    [Description("Abstand der automatischen Kontoauszug-Abrufe (Live-Quelle; offline ungenutzt)")]
+    public int IngestIntervalHours { get; set; } = 6;
+
+    [Category("Accounting")]
+    [DisplayName("Flex Query-Id")]
+    [Description("IBKR Activity Flex Query-Id (Zielland – Live-Abruf; leer = offline)")]
+    public string FlexQueryId { get; set; } = "";
+
+    [Category("Accounting")]
+    [DisplayName("Flex-Token")]
+    [Description("IBKR Flex Web Service Token (Zielland; verschlüsselt ablegen, nicht im Klartext)")]
+    [PasswordPropertyText(true)]
+    public string FlexToken { get; set; } = "";
+
+    public override string ToString() => $"Basis {BaseCurrency}, alle {IngestIntervalHours} h";
+}
+
+// ─── Supervisor ──────────────────────────────────────────────────────────────
+
+[TypeConverter(typeof(ExpandableObjectConverter))]
+public class SupervisorSettings
+{
+    [Category("Supervisor")]
+    [DisplayName("Modell")]
+    [Description("OpenRouter-Modell für die Analyse (Standard: openrouter/auto)")]
+    public string Model { get; set; } = "openrouter/auto";
+
+    [Category("Supervisor")]
+    [DisplayName("Token-Budget/Analyse")]
+    [Description("Weiches Token-Budget je Analyse-Lauf (Hinweis; harte Grenze = max. Tool-Iterationen)")]
+    public int TokenBudgetPerRun { get; set; } = 60000;
+
+    public override string ToString() => Model;
+}
+
 // ─── Root ────────────────────────────────────────────────────────────────────
 
 public class AppSettings
@@ -252,4 +299,14 @@ public class AppSettings
     [DisplayName("Trading")]
     [Description("Handelsmodus und Risiko-Parameter")]
     public TradingSettings   Trading        { get; set; } = new();
+
+    [Category("Accounting")]
+    [DisplayName("Accounting")]
+    [Description("Buchhaltung/Reporting (unabhängiger Kontoauszug-Ingest)")]
+    public AccountingSettings Accounting     { get; set; } = new();
+
+    [Category("Supervisor")]
+    [DisplayName("Supervisor")]
+    [Description("KI-Analyse/Forensik (OpenRouter, read-only)")]
+    public SupervisorSettings Supervisor     { get; set; } = new();
 }

src/IBKRTrader.Core/Trading/ExecutionService.cs

@@ -1,4 +1,7 @@
+using System.Text.Json;
 using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence;
+using IBKRTrader.Core.Persistence.Entities;
 using IBKRTrader.Core.Settings;
 
 namespace IBKRTrader.Core.Trading;
@@ -6,42 +9,59 @@ namespace IBKRTrader.Core.Trading;
 /// <summary>
 /// Führt Modul-Signale aus: globaler Schalter → Kurs → Konto → Risiko → Order → Buchung.
 /// Kennt kein Modul – Module rufen nur <see cref="ExecuteAsync"/> mit ihrem Signal auf.
+///
+/// Schreibt an jeder Verzweigung strukturiert ins Entscheidungsjournal (core_decision_journal) und bei
+/// Order-Aktionen ins Order-Lifecycle-Log (core_order_events) und reicht die <c>SignalId</c> bis in die
+/// Trade-Historie durch – Grundlage für die Supervisor-Forensik. Journal-Fehler brechen den Handel nie.
 /// </summary>
 public sealed class ExecutionService : IExecutionService
 {
-    private readonly IBrokerClient    _broker;
-    private readonly IRiskService     _risk;
+    private readonly IBrokerClient     _broker;
+    private readonly IRiskService      _risk;
     private readonly IPortfolioService _portfolio;
-    private readonly SettingsService  _settings;
-    private readonly LoggingService   _logger;
+    private readonly SettingsService   _settings;
+    private readonly LoggingService    _logger;
+    private readonly IDecisionJournal  _journal;
+    private readonly IOrderEventLog    _orderEvents;
 
     public ExecutionService(
         IBrokerClient     broker,
         IRiskService      risk,
         IPortfolioService portfolio,
         SettingsService   settings,
-        LoggingService    logger)
+        LoggingService    logger,
+        IDecisionJournal  journal,
+        IOrderEventLog    orderEvents)
     {
-        _broker    = broker;
-        _risk      = risk;
-        _portfolio = portfolio;
-        _settings  = settings;
-        _logger    = logger;
+        _broker      = broker;
+        _risk        = risk;
+        _portfolio   = portfolio;
+        _settings    = settings;
+        _logger      = logger;
+        _journal     = journal;
+        _orderEvents = orderEvents;
     }
 
     public async Task<ExecutionResult> ExecuteAsync(TradeSignal signal, CancellationToken ct = default)
     {
         var trading = _settings.Settings.Trading;
         var module  = signal.SourceModule;
+        var sideStr = signal.Side == TradeSide.Buy ? "BUY" : "SELL";
 
         // 1. Globaler Hauptschalter
         if (!trading.TradingEnabled)
+        {
+            Journal(signal, TradeDecision.Skipped, DecisionReason.TradingDisabled, "Trading global deaktiviert.");
             return Log(module, ExecutionResult.Skip("Trading global deaktiviert."));
+        }
 
         // 2. Kurs
         var quote = await _broker.GetQuoteAsync(signal.Symbol, ct);
         if (quote is null || quote.Last <= 0)
+        {
+            Journal(signal, TradeDecision.Skipped, DecisionReason.NoQuote, $"Kein Kurs für {signal.Symbol} verfügbar.");
             return Log(module, ExecutionResult.Skip($"Kein Kurs für {signal.Symbol} verfügbar."));
+        }
 
         // 3. Konto + 4. bestehende Exposure/Position
         var account     = await _broker.GetAccountStateAsync(ct);
@@ -62,7 +82,11 @@ public sealed class ExecutionService : IExecutionService
             (decimal)trading.MaxSlippagePercent);
         var decision = _risk.Evaluate(signal, context, riskParams);
         if (!decision.Approved)
+        {
+            Journal(signal, TradeDecision.Rejected, DecisionReason.RiskRejected, decision.Reason,
+                new { price = quote.Last, netLiq = account.NetLiquidation, exposure, existingQty });
             return Log(module, ExecutionResult.Skip(decision.Reason));
+        }
 
         // 6. Order platzieren
         var order = new OrderRequest
@@ -76,16 +100,62 @@ public sealed class ExecutionService : IExecutionService
 
         var result = await _broker.PlaceOrderAsync(order, ct);
         if (!result.Success)
+        {
+            OrderEvent(signal, OrderEventType.PlaceFailed, sideStr, order, quote.Last, result.Error ?? "Order fehlgeschlagen.");
+            Journal(signal, TradeDecision.Failed, DecisionReason.OrderFailed, result.Error ?? "Order fehlgeschlagen.");
             return Log(module, ExecutionResult.Error(result.Error ?? "Order fehlgeschlagen.", result));
+        }
+
+        OrderEvent(signal, OrderEventType.Filled, sideStr, order, result.AvgFillPrice, result.OrderId ?? "OK",
+            new { filled = result.FilledQuantity, avgPrice = result.AvgFillPrice });
 
         // 7. Buchung
         await _portfolio.RecordFillAsync(
             module, signal.Symbol, signal.Side,
-            result.FilledQuantity, result.AvgFillPrice, result.OrderId, ct);
+            result.FilledQuantity, result.AvgFillPrice, result.OrderId, signal.SignalId, ct);
+
+        Journal(signal, TradeDecision.Executed, DecisionReason.OrderPlaced,
+            $"Ausgeführt: {sideStr} {result.FilledQuantity}x {signal.Symbol} @ {result.AvgFillPrice:F2}",
+            new { orderId = result.OrderId, filled = result.FilledQuantity, avgPrice = result.AvgFillPrice });
 
         return Log(module, ExecutionResult.Execute(result));
     }
 
+    // ─── Journal-/Order-Event-Helfer (fehlertolerant über die EF-Implementierung) ────────────────
+
+    private void Journal(TradeSignal signal, TradeDecision decision, DecisionReason reason,
+        string message, object? context = null) =>
+        _journal.Write(new CoreDecisionRecord
+        {
+            Timestamp   = DateTime.UtcNow,
+            SignalId    = signal.SignalId,
+            Module      = signal.SourceModule,
+            Symbol      = signal.Symbol,
+            Side        = signal.Side == TradeSide.Buy ? "BUY" : "SELL",
+            SignalPrice = signal.LimitPrice ?? 0m,
+            Decision    = decision,
+            Reason      = reason,
+            ContextJson = context is null ? "" : JsonSerializer.Serialize(context),
+            Message     = message
+        });
+
+    private void OrderEvent(TradeSignal signal, OrderEventType type, string side, OrderRequest order,
+        decimal price, string response, object? details = null) =>
+        _orderEvents.Write(new CoreOrderEvent
+        {
+            Timestamp   = DateTime.UtcNow,
+            SignalId    = signal.SignalId,
+            Module      = signal.SourceModule,
+            Symbol      = signal.Symbol,
+            EventType   = type,
+            Side        = side,
+            Price       = price,
+            Quantity    = order.Quantity,
+            OrderType   = order.Type.ToString(),
+            Response    = response,
+            DetailsJson = details is null ? "" : JsonSerializer.Serialize(details)
+        });
+
     private ExecutionResult Log(string module, ExecutionResult result)
     {
         var text = $"[{result.Action}] {result.Reason}";

src/IBKRTrader.Core/Trading/IPortfolioService.cs

@@ -15,7 +15,8 @@ public interface IPortfolioService
     /// <summary>Verbucht einen Fill: aktualisiert Position, Budget und Trade-Historie.</summary>
     Task RecordFillAsync(
         string module, string symbol, TradeSide side,
-        int quantity, decimal price, string? orderId, CancellationToken ct = default);
+        int quantity, decimal price, string? orderId, string? signalId = null,
+        CancellationToken ct = default);
 
     /// <summary>Alle offenen Positionen eines Moduls.</summary>
     Task<IReadOnlyList<Position>> GetPositionsAsync(string module, CancellationToken ct = default);

src/IBKRTrader.Core/Trading/PortfolioService.cs

@@ -54,12 +54,13 @@ public sealed class PortfolioService : IPortfolioService
 
     public async Task RecordFillAsync(
         string module, string symbol, TradeSide side,
-        int quantity, decimal price, string? orderId, CancellationToken ct = default)
+        int quantity, decimal price, string? orderId, string? signalId = null,
+        CancellationToken ct = default)
     {
         if (quantity <= 0) return;
 
         var action = side == TradeSide.Buy ? "BUY" : "SELL";
-        await _history.RecordTradeAsync(module, symbol, action, quantity, price, orderId);
+        await _history.RecordTradeAsync(module, symbol, action, quantity, price, orderId, signalId: signalId);
 
         await using (var db = await _dbf.CreateDbContextAsync(ct))
         {

src/IBKRTrader.Core/Trading/TradeHistoryService.cs

@@ -19,7 +19,8 @@ public class TradeHistoryService
 
     public async Task RecordTradeAsync(
         string module, string symbol, string action,
-        decimal quantity, decimal price, string? ibkrOrderId = null, string? notes = null)
+        decimal quantity, decimal price, string? ibkrOrderId = null, string? notes = null,
+        string? signalId = null)
     {
         await using var db = await _dbf.CreateDbContextAsync();
         db.TradeHistory.Add(new CoreTrade
@@ -31,6 +32,7 @@ public class TradeHistoryService
             Price       = price,
             TotalValue  = quantity * price,
             TradedAt    = DateTime.UtcNow,
+            SignalId    = signalId,
             IbkrOrderId = ibkrOrderId,
             Status      = "Executed",
             Notes       = notes,

src/IBKRTrader.Core/Trading/TradingModels.cs

@@ -15,6 +15,12 @@ public enum TradingMode { Paper, Live }
 /// </summary>
 public sealed record TradeSignal
 {
+    /// <summary>
+    /// Korrelations-ID der Signal-Kette (Signal → Entscheidung(en) → Order(s) → Trade). Standardmäßig
+    /// neu erzeugt; ein Modul kann eine eigene ID setzen, um mehrere Signale zu verknüpfen.
+    /// </summary>
+    public string SignalId { get; init; } = Guid.NewGuid().ToString("N");
+
     /// <summary>Ticker-Symbol (z. B. "AAPL").</summary>
     public required string Symbol { get; init; }
 

src/IBKRTrader.Modules.Accounting/AccountingModule.cs

@@ -0,0 +1,70 @@
+using IBKRTrader.Core.Configuration;
+using IBKRTrader.Core.DependencyInjection;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Modularity;
+using IBKRTrader.Modules.Accounting.Persistence;
+using IBKRTrader.Modules.Accounting.Services;
+using IBKRTrader.Modules.Accounting.Ui;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace IBKRTrader.Modules.Accounting;
+
+/// <summary>
+/// Modul „Accounting": von unserer Trading-DB UNABHÄNGIGE, buchhalterisch korrekte Erfassung aller
+/// Kontobewegungen (IBKR-Kontoauszug → append-only Ledger) mit Periodenabrechnung/BWA, FX (USD/EUR) und
+/// CSV/PDF-Export. Reines Ingest-/Reporting-Modul, KEIN Handel. Konzept:
+/// docs/konzepte/KONZEPT-Modul-Accounting.md.
+///
+/// Live-Abruf (IBKR Flex Query) liegt hinter Interfaces mit Null-Stubs → das Modul läuft offline und
+/// bucht dann korrekt nichts. Die konkrete Steuerschicht ist bewusst offen (neutraler Ledger gilt
+/// unabhängig davon).
+/// </summary>
+public sealed class AccountingModule : IModule
+{
+    public string Name     => "Accounting";
+    public string DbPrefix => "acc_";
+
+    public void RegisterServices(IServiceCollection services, IConfiguration configuration)
+    {
+        var conn = ServiceCollectionExtensions.EffectiveConnectionString(configuration["Database:MySqlConnectionString"]);
+        services.AddDbContextFactory<AccountingDbContext>(o => o.UseMySql(conn, DatabaseServerVersion.Value));
+
+        services.AddSingleton<ILedgerRepository, EfLedgerRepository>();
+        services.AddSingleton<IIngestRunRepository, EfIngestRunRepository>();
+        services.AddSingleton<IRawSnapshotRepository, EfRawSnapshotRepository>();
+        services.AddSingleton<IFxRateRepository, EfFxRateRepository>();
+
+        services.AddSingleton<AccountingReportService>();
+
+        // Ingest-Quellen: Offline-Null-Stubs. Im Zielland werden die echten IBKR-Flex-Quellen registriert.
+        services.AddSingleton<IStatementSource, NullStatementSource>();
+        services.AddSingleton<IBalanceAnchorSource, NullBalanceAnchorSource>();
+        services.AddSingleton<IAccountingAccountSource, NullAccountSource>();
+
+        services.AddSingleton<AccountingIngestService>();
+        services.AddHostedService(sp => sp.GetRequiredService<AccountingIngestService>());
+    }
+
+    public void RegisterUi(IModuleUiHost host, IServiceProvider services)
+    {
+        host.RegisterView(new ModuleView
+        {
+            Id    = "accounting.main",
+            Title = "Accounting",
+            Group = Name,
+            Order = 400,
+            CreateForm = () => new AccountingMainForm(
+                services.GetRequiredService<ILedgerRepository>(),
+                services.GetRequiredService<IIngestRunRepository>(),
+                services.GetRequiredService<AccountingReportService>(),
+                services.GetRequiredService<AccountingIngestService>(),
+                services.GetRequiredService<LoggingService>())
+        });
+    }
+
+    // DB-Schema wird extern per `dotnet ef database update` angewendet (keine Laufzeit-Migration).
+    public Task StartAsync(CancellationToken cancellationToken) => Task.CompletedTask;
+    public Task StopAsync(CancellationToken cancellationToken)  => Task.CompletedTask;
+}

src/IBKRTrader.Modules.Accounting/IBKRTrader.Modules.Accounting.csproj

@@ -0,0 +1,33 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0-windows</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <!-- Modul trägt eigene WinForms-UI (Modul-Fenster) bei. -->
+    <UseWindowsForms>true</UseWindowsForms>
+    <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="8.0.3" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.11">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <!-- PDF-Export: PDFsharp/MigraDoc ist echte MIT-Lizenz ohne Umsatzschwelle (bewusst statt QuestPDF). -->
+    <PackageReference Include="PDFsharp-MigraDoc" Version="6.2.4" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\IBKRTrader.Core\IBKRTrader.Core.csproj" />
+  </ItemGroup>
+
+  <!-- Erlaubt dem Testprojekt, interne Service-Methoden zu testen. -->
+  <ItemGroup>
+    <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleToAttribute">
+      <_Parameter1>IBKRTrader.Tests</_Parameter1>
+    </AssemblyAttribute>
+  </ItemGroup>
+
+</Project>

src/IBKRTrader.Modules.Accounting/Logic/AccountingClassifier.cs

@@ -0,0 +1,88 @@
+using IBKRTrader.Modules.Accounting.Models;
+
+namespace IBKRTrader.Modules.Accounting.Logic;
+
+/// <summary>
+/// Reine, seiteneffektfreie Klassifikation roher IBKR-Auszugszeilen → normalisierter Buchungssatz
+/// (Typ, Vorzeichen, Idempotenz-Schlüssel). Geldkritisch → vollständig unit-getestet. Enthält keine
+/// I/O; die Datenbeschaffung liegt in den Ingest-Services hinter Interfaces.
+///
+/// Vorzeichenkonvention <see cref="LedgerEntry.NetBase"/>: Cash-Wirkung aufs Konto (+ Zufluss / − Abfluss).
+/// Annahme (im Export dokumentiert): BUY kostet Brutto+Kommission, SELL bringt Brutto−Kommission.
+/// </summary>
+public static class AccountingClassifier
+{
+    public static LedgerEntry ClassifyExecution(RawExecution e, long ingestBatchId)
+    {
+        bool isSell = string.Equals(e.Side?.Trim(), "SELL", StringComparison.OrdinalIgnoreCase);
+        LedgerEventType type = isSell ? LedgerEventType.TradeSell : LedgerEventType.TradeBuy;
+
+        decimal gross = Math.Abs(e.GrossBase);
+        decimal fee = Math.Abs(e.FeeBase);
+        decimal net = isSell ? gross - fee : -(gross + fee);
+
+        return new LedgerEntry
+        {
+            AccountId      = e.AccountId,
+            EventType      = type,
+            Timestamp      = e.Timestamp,
+            Symbol         = e.Symbol,
+            AssetClass     = e.AssetClass,
+            Currency       = e.Currency,
+            Side           = isSell ? "SELL" : "BUY",
+            Quantity       = e.Quantity,
+            PriceNative    = e.PriceNative,
+            GrossBase      = gross,
+            FeeBase        = fee,
+            NetBase        = net,
+            TransactionId  = e.TradeId,
+            Source         = "ibkr-flex",
+            IngestBatchId  = ingestBatchId,
+            IdempotencyKey = $"TRD|{type}|{e.TradeId.Trim()}"
+        };
+    }
+
+    public static LedgerEntry ClassifyCashTransaction(RawCashTransaction t, long ingestBatchId)
+    {
+        LedgerEventType type = MapCashType(t.Type);
+        decimal amount = t.AmountBase;              // signiert wie im Auszug
+        decimal gross = Math.Abs(amount);
+
+        // Ein-/Auszahlung: Richtung bestimmt das Vorzeichen (IBKR-Kategorie oft kombiniert "Deposits/Withdrawals").
+        if (type is LedgerEventType.Deposit or LedgerEventType.Withdrawal)
+            type = amount >= 0 ? LedgerEventType.Deposit : LedgerEventType.Withdrawal;
+
+        return new LedgerEntry
+        {
+            AccountId      = t.AccountId,
+            EventType      = type,
+            Timestamp      = t.Timestamp,
+            Symbol         = t.Symbol,
+            Currency       = t.Currency,
+            GrossBase      = gross,
+            FeeBase        = type == LedgerEventType.Fee ? gross : 0m,
+            NetBase        = amount,
+            TransactionId  = t.TransactionId,
+            Source         = "ibkr-flex",
+            IngestBatchId  = ingestBatchId,
+            IdempotencyKey = $"CASH|{type}|{t.TransactionId.Trim()}"
+        };
+    }
+
+    /// <summary>Σ NetBase – die Buchhaltungs-Sicht des Kontosaldos (für den Balance-Anker-Abgleich).</summary>
+    public static decimal SumNet(IEnumerable<LedgerEntry> entries) => entries.Sum(e => e.NetBase);
+
+    // ----- intern -----
+
+    internal static LedgerEventType MapCashType(string? ibkrType)
+    {
+        string t = (ibkrType ?? string.Empty).Trim().ToUpperInvariant();
+        if (t.Contains("WITHHOLDING") || t.Contains("QUELLENSTEUER")) return LedgerEventType.TaxWithholding;
+        if (t.Contains("DIVIDEND"))                                    return LedgerEventType.Dividend;
+        if (t.Contains("INTEREST") || t.Contains("ZINS"))             return LedgerEventType.Interest;
+        if (t.Contains("DEPOSIT") || t.Contains("EINZAHLUNG"))        return LedgerEventType.Deposit;
+        if (t.Contains("WITHDRAWAL") || t.Contains("AUSZAHLUNG"))     return LedgerEventType.Withdrawal;
+        if (t.Contains("FEE") || t.Contains("COMMISSION") || t.Contains("GEBÜHR")) return LedgerEventType.Fee;
+        return LedgerEventType.Other;
+    }
+}

src/IBKRTrader.Modules.Accounting/Logic/AccountingEngine.cs

@@ -0,0 +1,89 @@
+using IBKRTrader.Modules.Accounting.Models;
+
+namespace IBKRTrader.Modules.Accounting.Logic;
+
+/// <summary>
+/// Neutrale Periodenabrechnung: aggregiert die Ledger-Sätze eines Zeitraums (× Account oder alle) zu
+/// einer prüfbaren Aufstellung — länderneutral, ohne steuerliche Einordnung (die käme getrennt in einer
+/// späteren Steuerschicht). Alle Beträge in Kontobasiswährung; die EUR-Umrechnung liegt separat im
+/// <see cref="FxConverter"/>. Vorbild: PolytraderSharp <c>AccountingEngine</c>.
+/// </summary>
+public sealed record PeriodStatement(
+    string? AccountId,
+    DateTime From,
+    DateTime To,
+    decimal OpeningBalance,
+    decimal ClosingBalance,
+    decimal Deposits,
+    decimal Withdrawals,
+    decimal TradeVolume,
+    decimal Dividends,
+    decimal Interest,
+    decimal Fees,
+    decimal TaxWithheld,
+    decimal NetTradingResult,   // operatives Ergebnis (Cash-Basis, EXKL. Ein-/Auszahlungen)
+    int TradeCount,
+    int EntryCount)
+{
+    /// <summary>Invariante: Endsaldo − Anfangssaldo = Ergebnis + Einzahlungen − Auszahlungen.</summary>
+    public decimal BalanceChange => ClosingBalance - OpeningBalance;
+}
+
+public static class AccountingEngine
+{
+    private static bool IsCashflowType(LedgerEventType t) =>
+        t is LedgerEventType.Deposit or LedgerEventType.Withdrawal;
+
+    /// <summary>
+    /// Baut die Abrechnung für [<paramref name="from"/>, <paramref name="to"/>]. <paramref name="allUpToTo"/>
+    /// enthält ALLE Ledger-Sätze des Scopes bis <paramref name="to"/> (für den Anfangssaldo werden die
+    /// Sätze vor <paramref name="from"/> kumuliert). Grenzen inklusive.
+    /// </summary>
+    public static PeriodStatement BuildStatement(
+        IEnumerable<LedgerEntry> allUpToTo, DateTime from, DateTime to, string? accountId)
+    {
+        var list = allUpToTo.Where(e => e.Timestamp <= to).ToList();
+
+        decimal opening = list.Where(e => e.Timestamp < from).Sum(e => e.NetBase);
+        var period = list.Where(e => e.Timestamp >= from && e.Timestamp <= to).ToList();
+
+        decimal SumWhere(Func<LedgerEntry, bool> pred, Func<LedgerEntry, decimal> sel) =>
+            period.Where(pred).Sum(sel);
+
+        decimal deposits    = SumWhere(e => e.EventType == LedgerEventType.Deposit, e => e.GrossBase);
+        decimal withdrawals = SumWhere(e => e.EventType == LedgerEventType.Withdrawal, e => e.GrossBase);
+        decimal tradeVolume = SumWhere(e => e.EventType is LedgerEventType.TradeBuy or LedgerEventType.TradeSell, e => e.GrossBase);
+        decimal dividends   = SumWhere(e => e.EventType == LedgerEventType.Dividend, e => e.NetBase);
+        decimal interest    = SumWhere(e => e.EventType == LedgerEventType.Interest, e => e.NetBase);
+        decimal taxWithheld = SumWhere(e => e.EventType == LedgerEventType.TaxWithholding, e => e.GrossBase);
+        decimal fees        = period.Sum(e => e.FeeBase);
+        decimal netTrading  = period.Where(e => !IsCashflowType(e.EventType)).Sum(e => e.NetBase);
+        decimal closing     = opening + period.Sum(e => e.NetBase);
+        int tradeCount      = period.Count(e => e.EventType is LedgerEventType.TradeBuy or LedgerEventType.TradeSell);
+
+        return new PeriodStatement(accountId, from, to, opening, closing, deposits, withdrawals,
+            tradeVolume, dividends, interest, fees, taxWithheld, netTrading, tradeCount, period.Count);
+    }
+
+    /// <summary>
+    /// Zerlegt den Zeitraum in Kalendermonate und liefert je Monat eine Abrechnung (für den
+    /// Perioden-/Monatsvergleich). Anfangssaldo jedes Monats = Endsaldo des Vormonats.
+    /// </summary>
+    public static List<PeriodStatement> BuildMonthlyBreakdown(
+        IEnumerable<LedgerEntry> allUpToTo, DateTime from, DateTime to, string? accountId)
+    {
+        var list = allUpToTo.ToList();
+        var result = new List<PeriodStatement>();
+        var monthStart = new DateTime(from.Year, from.Month, 1, 0, 0, 0, DateTimeKind.Utc);
+
+        while (monthStart <= to)
+        {
+            DateTime monthEnd = monthStart.AddMonths(1).AddTicks(-1);
+            DateTime windowFrom = monthStart < from ? from : monthStart;
+            DateTime windowTo = monthEnd > to ? to : monthEnd;
+            result.Add(BuildStatement(list, windowFrom, windowTo, accountId));
+            monthStart = monthStart.AddMonths(1);
+        }
+        return result;
+    }
+}

src/IBKRTrader.Modules.Accounting/Logic/CsvExporter.cs

@@ -0,0 +1,72 @@
+using System.Globalization;
+using System.Text;
+using IBKRTrader.Modules.Accounting.Models;
+
+namespace IBKRTrader.Modules.Accounting.Logic;
+
+/// <summary>
+/// Reiner CSV-Export: erzeugt maschinen-/prüfbare CSV-Strings aus Ledger und Abrechnung. Kulturinvariant
+/// (Punkt-Dezimal, ISO-Datum), RFC-4180-Quoting. Der Dateizugriff liegt in der UI; die Formatierung ist
+/// hier pur + testbar.
+/// </summary>
+public static class CsvExporter
+{
+    private static string F(decimal d) => d.ToString("0.######", CultureInfo.InvariantCulture);
+    private static string T(DateTime d) => d.ToString("yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture);
+
+    private static string Q(string? s)
+    {
+        s ??= string.Empty;
+        bool needsQuote = s.Contains(',') || s.Contains('"') || s.Contains('\n') || s.Contains('\r');
+        if (needsQuote) s = "\"" + s.Replace("\"", "\"\"") + "\"";
+        return s;
+    }
+
+    /// <summary>Vollständiger Ledger-Export (eine Zeile je Buchungssatz, inkl. Nachweisspalten).</summary>
+    public static string Ledger(IEnumerable<LedgerEntry> entries)
+    {
+        var sb = new StringBuilder();
+        sb.Append("Timestamp,AccountId,EventType,Side,Symbol,AssetClass,Currency,Quantity,PriceNative,GrossBase,FeeBase,NetBase,TransactionId,Source,IdempotencyKey\n");
+        foreach (var e in entries.OrderBy(e => e.Timestamp))
+        {
+            sb.Append(T(e.Timestamp)).Append(',')
+              .Append(Q(e.AccountId)).Append(',')
+              .Append(e.EventType).Append(',')
+              .Append(Q(e.Side)).Append(',')
+              .Append(Q(e.Symbol)).Append(',')
+              .Append(Q(e.AssetClass)).Append(',')
+              .Append(Q(e.Currency)).Append(',')
+              .Append(F(e.Quantity)).Append(',')
+              .Append(F(e.PriceNative)).Append(',')
+              .Append(F(e.GrossBase)).Append(',')
+              .Append(F(e.FeeBase)).Append(',')
+              .Append(F(e.NetBase)).Append(',')
+              .Append(Q(e.TransactionId)).Append(',')
+              .Append(Q(e.Source)).Append(',')
+              .Append(Q(e.IdempotencyKey)).Append('\n');
+        }
+        return sb.ToString();
+    }
+
+    /// <summary>Aggregat-Export einer Abrechnung (Kennzahl,Wert) – prüfbare Zusammenfassung.</summary>
+    public static string Statement(PeriodStatement s, string currencyCode = "USD")
+    {
+        var sb = new StringBuilder();
+        sb.Append("Kennzahl,").Append(Q(currencyCode)).Append('\n');
+        void Row(string k, decimal v) => sb.Append(Q(k)).Append(',').Append(F(v)).Append('\n');
+        sb.Append(Q($"Zeitraum {T(s.From)} .. {T(s.To)}" + (s.AccountId is null ? " | alle Konten" : $" | Konto {s.AccountId}"))).Append(",\n");
+        Row("Anfangssaldo", s.OpeningBalance);
+        Row("Einzahlungen", s.Deposits);
+        Row("Auszahlungen", s.Withdrawals);
+        Row("Handelsvolumen", s.TradeVolume);
+        Row("Dividenden", s.Dividends);
+        Row("Zinsen", s.Interest);
+        Row("Fees", s.Fees);
+        Row("Quellensteuer", s.TaxWithheld);
+        Row("Netto-Handelsergebnis (Cash)", s.NetTradingResult);
+        Row("Endsaldo", s.ClosingBalance);
+        sb.Append(Q("Anzahl Trades")).Append(',').Append(s.TradeCount).Append('\n');
+        sb.Append(Q("Anzahl Buchungen")).Append(',').Append(s.EntryCount).Append('\n');
+        return sb.ToString();
+    }
+}

src/IBKRTrader.Modules.Accounting/Logic/FxConverter.cs

@@ -0,0 +1,39 @@
+using IBKRTrader.Modules.Accounting.Models;
+
+namespace IBKRTrader.Modules.Accounting.Logic;
+
+/// <summary>
+/// Reine FX-Umrechnung der Basiswährung (USD) → EUR über amtliche Tageskurse (acc_fx_rates,
+/// EZB-Referenzkurs). „Nearest-on-or-before": zu einem Datum gilt der jüngste Kurs an oder vor diesem
+/// Tag (Wochenenden/Feiertage). Gibt es keinen passenden Kurs, ist der EUR-Wert nicht bestimmbar (null).
+/// </summary>
+public sealed class FxConverter
+{
+    // aufsteigend nach Datum sortierte Kurse
+    private readonly List<FxRate> _rates;
+
+    public FxConverter(IEnumerable<FxRate> rates)
+    {
+        _rates = rates.OrderBy(r => r.Date.Date).ToList();
+    }
+
+    /// <summary>USD→EUR-Kurs, der an oder vor <paramref name="date"/> gültig war (null, wenn keiner existiert).</summary>
+    public decimal? UsdToEurOn(DateTime date)
+    {
+        decimal? rate = null;
+        var day = date.Date;
+        foreach (var r in _rates)
+        {
+            if (r.Date.Date <= day) rate = r.UsdToEur;
+            else break;
+        }
+        return rate;
+    }
+
+    /// <summary>Rechnet einen USD-Betrag zum Kurs des Datums in EUR um (null, wenn kein Kurs vorliegt).</summary>
+    public decimal? UsdToEur(decimal usdAmount, DateTime date)
+    {
+        var rate = UsdToEurOn(date);
+        return rate.HasValue ? decimal.Round(usdAmount * rate.Value, 2, MidpointRounding.AwayFromZero) : null;
+    }
+}

src/IBKRTrader.Modules.Accounting/Logic/PdfExporter.cs

@@ -0,0 +1,162 @@
+using System.Security.Cryptography;
+using System.Text;
+using IBKRTrader.Modules.Accounting.Models;
+using MigraDoc.DocumentObjectModel;
+using MigraDoc.DocumentObjectModel.Tables;
+using MigraDoc.Rendering;
+
+namespace IBKRTrader.Modules.Accounting.Logic;
+
+/// <summary>
+/// PDF-Export der neutralen Abrechnung via PDFsharp/MigraDoc (MIT, keine Umsatzschwelle). Kopf +
+/// Aggregat-Tabelle + Monatsvergleich + Transaktionsliste + Methodik-/Nachweis-Seite. Länderneutral
+/// (KEINE steuerliche Einordnung). Beträge in der übergebenen Anzeige-Währung; die Umrechnung erfolgt
+/// außerhalb (Services), hier nur der Faktor.
+/// </summary>
+public static class PdfExporter
+{
+    public static byte[] Render(
+        PeriodStatement statement,
+        IReadOnlyList<PeriodStatement> monthly,
+        IReadOnlyList<LedgerEntry> periodEntries,
+        string currencyCode, decimal currencyFactor, string currencyNote)
+    {
+        decimal V(decimal baseAmount) => Math.Round(baseAmount * currencyFactor, 2, MidpointRounding.AwayFromZero);
+        string M(decimal baseAmount) => V(baseAmount).ToString("N2") + " " + currencyCode;
+
+        var doc = new Document();
+        doc.Info.Title = "Buchhalterische Abrechnung";
+        var style = doc.Styles["Normal"]!;
+        style.Font.Name = "Segoe UI";
+        style.Font.Size = 9;
+
+        var section = doc.AddSection();
+        section.PageSetup.Orientation = MigraDoc.DocumentObjectModel.Orientation.Landscape;
+        section.PageSetup.LeftMargin = Unit.FromCentimeter(1.5);
+        section.PageSetup.RightMargin = Unit.FromCentimeter(1.5);
+
+        // ---- Kopf ----
+        var head = section.AddParagraph("Buchhalterische Abrechnung (neutral)");
+        head.Format.Font.Size = 16; head.Format.Font.Bold = true;
+        head.Format.SpaceAfter = Unit.FromMillimeter(2);
+
+        var meta = section.AddParagraph();
+        meta.Format.SpaceAfter = Unit.FromMillimeter(4);
+        meta.AddText($"Konto: {statement.AccountId ?? "alle Konten"}");
+        meta.AddLineBreak();
+        meta.AddText($"Zeitraum: {statement.From:yyyy-MM-dd} bis {statement.To:yyyy-MM-dd}");
+        meta.AddLineBreak();
+        meta.AddText($"Währung: {currencyCode} ({currencyNote})");
+        meta.AddLineBreak();
+        meta.AddText($"Erstellt: {DateTime.Now:yyyy-MM-dd HH:mm}");
+
+        // ---- Aggregat ----
+        AddSectionTitle(section, "Zusammenfassung");
+        var agg = NewTable(section, new[] { 8.0, 6.0 });
+        AddKeyValue(agg, "Anfangssaldo", M(statement.OpeningBalance));
+        AddKeyValue(agg, "Einzahlungen", M(statement.Deposits));
+        AddKeyValue(agg, "Auszahlungen", M(statement.Withdrawals));
+        AddKeyValue(agg, "Handelsvolumen", M(statement.TradeVolume));
+        AddKeyValue(agg, "Dividenden", M(statement.Dividends));
+        AddKeyValue(agg, "Zinsen", M(statement.Interest));
+        AddKeyValue(agg, "Fees", M(statement.Fees));
+        AddKeyValue(agg, "Quellensteuer", M(statement.TaxWithheld));
+        AddKeyValue(agg, "Netto-Handelsergebnis (Cash-Basis)", M(statement.NetTradingResult));
+        AddKeyValue(agg, "Endsaldo", M(statement.ClosingBalance));
+        AddKeyValue(agg, "Anzahl Trades", statement.TradeCount.ToString());
+        AddKeyValue(agg, "Anzahl Buchungen", statement.EntryCount.ToString());
+
+        // ---- Monatsvergleich ----
+        if (monthly.Count > 1)
+        {
+            AddSectionTitle(section, "Monatsvergleich");
+            var mt = NewTable(section, new[] { 3.0, 3.5, 3.5, 3.5, 3.5, 3.5, 3.5, 3.0 });
+            HeaderRow(mt, "Monat", "Anfang", "Einz.", "Ausz.", "Volumen", "Fees", "Ergebnis", "Endsaldo");
+            foreach (var m in monthly)
+                DataRow(mt, m.From.ToString("yyyy-MM"), M(m.OpeningBalance), M(m.Deposits), M(m.Withdrawals),
+                    M(m.TradeVolume), M(m.Fees), M(m.NetTradingResult), M(m.ClosingBalance));
+        }
+
+        // ---- Transaktionsliste ----
+        AddSectionTitle(section, $"Transaktionen ({periodEntries.Count})");
+        var lt = NewTable(section, new[] { 3.5, 3.0, 2.0, 3.0, 2.5, 2.5, 2.5, 4.0 });
+        HeaderRow(lt, "Zeit (UTC)", "Typ", "Side", "Symbol", "Menge", "Preis", "Netto", "Transaktion");
+        foreach (var e in periodEntries.OrderBy(e => e.Timestamp))
+            DataRow(lt, e.Timestamp.ToString("yyyy-MM-dd HH:mm"), e.EventType.ToString(), e.Side,
+                Trim(e.Symbol, 12), e.Quantity.ToString("0.###"), e.PriceNative.ToString("0.###"),
+                M(e.NetBase), Trim(e.TransactionId, 22));
+
+        // ---- Methodik / Nachweis ----
+        AddSectionTitle(section, "Methodik & Nachweis");
+        var method = section.AddParagraph();
+        method.Format.Font.Size = 8;
+        method.AddText("• Buchungsgrundlage sind ausschließlich unabhängige IBKR-Kontoauszüge (Activity Flex Query), nicht unsere Trading-DB; append-only.");
+        method.AddLineBreak();
+        method.AddText("• Netto-Handelsergebnis ist Cash-Basis (Erlöse − Kosten − Fees) und schließt Ein-/Auszahlungen aus.");
+        method.AddLineBreak();
+        method.AddText($"• Währungsumrechnung: {currencyNote}");
+        method.AddLineBreak();
+        method.AddText("• Dies ist eine neutrale, prüfbare Aufstellung und KEINE Steuerberatung. Eine steuerliche Einordnung erfolgt getrennt.");
+        method.AddLineBreak();
+        method.AddText($"• Daten-Hash (SHA-256 über Ledger+Aggregat): {DataHash(statement, periodEntries)}");
+
+        var renderer = new PdfDocumentRenderer { Document = doc };
+        renderer.RenderDocument();
+        using var ms = new MemoryStream();
+        renderer.PdfDocument.Save(ms, false);
+        return ms.ToArray();
+    }
+
+    // ---- MigraDoc-Helfer ----
+
+    private static void AddSectionTitle(Section s, string text)
+    {
+        var p = s.AddParagraph(text);
+        p.Format.Font.Size = 12; p.Format.Font.Bold = true;
+        p.Format.SpaceBefore = Unit.FromMillimeter(4); p.Format.SpaceAfter = Unit.FromMillimeter(1);
+    }
+
+    private static Table NewTable(Section s, double[] widthsCm)
+    {
+        var t = s.AddTable();
+        t.Borders.Width = 0.25; t.Borders.Color = Colors.LightGray;
+        foreach (var w in widthsCm) t.AddColumn(Unit.FromCentimeter(w));
+        return t;
+    }
+
+    private static void AddKeyValue(Table t, string key, string value)
+    {
+        var r = t.AddRow();
+        r.Cells[0].AddParagraph(key);
+        var vp = r.Cells[1].AddParagraph(value);
+        vp.Format.Alignment = ParagraphAlignment.Right;
+    }
+
+    private static void HeaderRow(Table t, params string[] cells)
+    {
+        var r = t.AddRow();
+        r.Shading.Color = Colors.WhiteSmoke;
+        for (int i = 0; i < cells.Length; i++)
+        {
+            var p = r.Cells[i].AddParagraph(cells[i]);
+            p.Format.Font.Bold = true;
+        }
+    }
+
+    private static void DataRow(Table t, params string[] cells)
+    {
+        var r = t.AddRow();
+        for (int i = 0; i < cells.Length; i++)
+            r.Cells[i].AddParagraph(cells[i] ?? string.Empty);
+    }
+
+    private static string Trim(string s, int max) =>
+        string.IsNullOrEmpty(s) ? string.Empty : (s.Length <= max ? s : s[..max] + "…");
+
+    private static string DataHash(PeriodStatement s, IReadOnlyList<LedgerEntry> entries)
+    {
+        string material = CsvExporter.Statement(s) + CsvExporter.Ledger(entries);
+        byte[] hash = SHA256.HashData(Encoding.UTF8.GetBytes(material));
+        return Convert.ToHexString(hash)[..16].ToLowerInvariant();
+    }
+}

src/IBKRTrader.Modules.Accounting/Migrations/20260730165418_InitialAccounting.Designer.cs

@@ -0,0 +1,236 @@
+// <auto-generated />
+using System;
+using IBKRTrader.Modules.Accounting.Persistence;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace IBKRTrader.Modules.Accounting.Migrations
+{
+    [DbContext(typeof(AccountingDbContext))]
+    [Migration("20260730165418_InitialAccounting")]
+    partial class InitialAccounting
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.13")
+                .HasAnnotation("Relational:MaxIdentifierLength", 64);
+
+            MySqlModelBuilderExtensions.AutoIncrementColumns(modelBuilder);
+
+            modelBuilder.Entity("IBKRTrader.Modules.Accounting.Models.FxRate", b =>
+                {
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("date");
+
+                    b.Property<string>("Source")
+                        .IsRequired()
+                        .HasMaxLength(40)
+                        .HasColumnType("varchar(40)");
+
+                    b.Property<decimal>("UsdToEur")
+                        .HasPrecision(18, 8)
+                        .HasColumnType("decimal(18,8)");
+
+                    b.HasKey("Date");
+
+                    b.ToTable("acc_fx_rates", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Modules.Accounting.Models.IngestRun", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("AccountId")
+                        .IsRequired()
+                        .HasMaxLength(30)
+                        .HasColumnType("varchar(30)");
+
+                    b.Property<bool>("Backfill")
+                        .HasColumnType("tinyint(1)");
+
+                    b.Property<decimal?>("BalanceAnchorBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<decimal?>("BalanceDeltaBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<int>("DuplicateEntries")
+                        .HasColumnType("int");
+
+                    b.Property<DateTime?>("FinishedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<DateTime?>("FromTimestamp")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<decimal?>("LedgerNetBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<string>("Message")
+                        .IsRequired()
+                        .HasMaxLength(1000)
+                        .HasColumnType("varchar(1000)");
+
+                    b.Property<int>("NewEntries")
+                        .HasColumnType("int");
+
+                    b.Property<DateTime>("StartedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<bool>("Success")
+                        .HasColumnType("tinyint(1)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AccountId", "StartedAt");
+
+                    b.ToTable("acc_ingest_runs", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Modules.Accounting.Models.LedgerEntry", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("AccountId")
+                        .IsRequired()
+                        .HasMaxLength(30)
+                        .HasColumnType("varchar(30)");
+
+                    b.Property<string>("AssetClass")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("Currency")
+                        .IsRequired()
+                        .HasMaxLength(5)
+                        .HasColumnType("varchar(5)");
+
+                    b.Property<string>("EventType")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<decimal>("FeeBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<decimal>("GrossBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<string>("IdempotencyKey")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("varchar(120)");
+
+                    b.Property<long>("IngestBatchId")
+                        .HasColumnType("bigint");
+
+                    b.Property<DateTime>("IngestedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<decimal>("NetBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<decimal>("PriceNative")
+                        .HasPrecision(18, 6)
+                        .HasColumnType("decimal(18,6)");
+
+                    b.Property<decimal>("Quantity")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<string>("Side")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("Source")
+                        .IsRequired()
+                        .HasMaxLength(40)
+                        .HasColumnType("varchar(40)");
+
+                    b.Property<string>("Symbol")
+                        .IsRequired()
+                        .HasMaxLength(30)
+                        .HasColumnType("varchar(30)");
+
+                    b.Property<DateTime>("Timestamp")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("TransactionId")
+                        .IsRequired()
+                        .HasMaxLength(60)
+                        .HasColumnType("varchar(60)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EventType");
+
+                    b.HasIndex("IdempotencyKey")
+                        .IsUnique();
+
+                    b.HasIndex("AccountId", "Timestamp");
+
+                    b.ToTable("acc_ledger", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Modules.Accounting.Models.RawSnapshot", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("AccountId")
+                        .IsRequired()
+                        .HasMaxLength(30)
+                        .HasColumnType("varchar(30)");
+
+                    b.Property<DateTime>("CapturedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<long>("IngestRunId")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("Json")
+                        .IsRequired()
+                        .HasColumnType("longtext");
+
+                    b.Property<string>("SourceKind")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("IngestRunId");
+
+                    b.ToTable("acc_raw", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

src/IBKRTrader.Modules.Accounting/Migrations/20260730165418_InitialAccounting.cs

@@ -0,0 +1,163 @@
+using System;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace IBKRTrader.Modules.Accounting.Migrations
+{
+    /// <inheritdoc />
+    public partial class InitialAccounting : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterDatabase()
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "acc_fx_rates",
+                columns: table => new
+                {
+                    Date = table.Column<DateTime>(type: "date", nullable: false),
+                    UsdToEur = table.Column<decimal>(type: "decimal(18,8)", precision: 18, scale: 8, nullable: false),
+                    Source = table.Column<string>(type: "varchar(40)", maxLength: 40, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_acc_fx_rates", x => x.Date);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "acc_ingest_runs",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    AccountId = table.Column<string>(type: "varchar(30)", maxLength: 30, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Backfill = table.Column<bool>(type: "tinyint(1)", nullable: false),
+                    StartedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    FinishedAt = table.Column<DateTime>(type: "datetime(6)", nullable: true),
+                    FromTimestamp = table.Column<DateTime>(type: "datetime(6)", nullable: true),
+                    NewEntries = table.Column<int>(type: "int", nullable: false),
+                    DuplicateEntries = table.Column<int>(type: "int", nullable: false),
+                    Success = table.Column<bool>(type: "tinyint(1)", nullable: false),
+                    Message = table.Column<string>(type: "varchar(1000)", maxLength: 1000, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    BalanceAnchorBase = table.Column<decimal>(type: "decimal(28,8)", precision: 28, scale: 8, nullable: true),
+                    LedgerNetBase = table.Column<decimal>(type: "decimal(28,8)", precision: 28, scale: 8, nullable: true),
+                    BalanceDeltaBase = table.Column<decimal>(type: "decimal(28,8)", precision: 28, scale: 8, nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_acc_ingest_runs", x => x.Id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "acc_ledger",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    AccountId = table.Column<string>(type: "varchar(30)", maxLength: 30, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    EventType = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Timestamp = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    Symbol = table.Column<string>(type: "varchar(30)", maxLength: 30, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    AssetClass = table.Column<string>(type: "varchar(10)", maxLength: 10, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Currency = table.Column<string>(type: "varchar(5)", maxLength: 5, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Side = table.Column<string>(type: "varchar(10)", maxLength: 10, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Quantity = table.Column<decimal>(type: "decimal(28,8)", precision: 28, scale: 8, nullable: false),
+                    PriceNative = table.Column<decimal>(type: "decimal(18,6)", precision: 18, scale: 6, nullable: false),
+                    GrossBase = table.Column<decimal>(type: "decimal(28,8)", precision: 28, scale: 8, nullable: false),
+                    FeeBase = table.Column<decimal>(type: "decimal(28,8)", precision: 28, scale: 8, nullable: false),
+                    NetBase = table.Column<decimal>(type: "decimal(28,8)", precision: 28, scale: 8, nullable: false),
+                    TransactionId = table.Column<string>(type: "varchar(60)", maxLength: 60, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Source = table.Column<string>(type: "varchar(40)", maxLength: 40, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    IngestBatchId = table.Column<long>(type: "bigint", nullable: false),
+                    IngestedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    IdempotencyKey = table.Column<string>(type: "varchar(120)", maxLength: 120, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_acc_ledger", x => x.Id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "acc_raw",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    IngestRunId = table.Column<long>(type: "bigint", nullable: false),
+                    AccountId = table.Column<string>(type: "varchar(30)", maxLength: 30, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    SourceKind = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Json = table.Column<string>(type: "longtext", nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    CapturedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_acc_raw", x => x.Id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_acc_ingest_runs_AccountId_StartedAt",
+                table: "acc_ingest_runs",
+                columns: new[] { "AccountId", "StartedAt" });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_acc_ledger_AccountId_Timestamp",
+                table: "acc_ledger",
+                columns: new[] { "AccountId", "Timestamp" });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_acc_ledger_EventType",
+                table: "acc_ledger",
+                column: "EventType");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_acc_ledger_IdempotencyKey",
+                table: "acc_ledger",
+                column: "IdempotencyKey",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_acc_raw_IngestRunId",
+                table: "acc_raw",
+                column: "IngestRunId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "acc_fx_rates");
+
+            migrationBuilder.DropTable(
+                name: "acc_ingest_runs");
+
+            migrationBuilder.DropTable(
+                name: "acc_ledger");
+
+            migrationBuilder.DropTable(
+                name: "acc_raw");
+        }
+    }
+}

src/IBKRTrader.Modules.Accounting/Migrations/AccountingDbContextModelSnapshot.cs

@@ -0,0 +1,233 @@
+// <auto-generated />
+using System;
+using IBKRTrader.Modules.Accounting.Persistence;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace IBKRTrader.Modules.Accounting.Migrations
+{
+    [DbContext(typeof(AccountingDbContext))]
+    partial class AccountingDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.13")
+                .HasAnnotation("Relational:MaxIdentifierLength", 64);
+
+            MySqlModelBuilderExtensions.AutoIncrementColumns(modelBuilder);
+
+            modelBuilder.Entity("IBKRTrader.Modules.Accounting.Models.FxRate", b =>
+                {
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("date");
+
+                    b.Property<string>("Source")
+                        .IsRequired()
+                        .HasMaxLength(40)
+                        .HasColumnType("varchar(40)");
+
+                    b.Property<decimal>("UsdToEur")
+                        .HasPrecision(18, 8)
+                        .HasColumnType("decimal(18,8)");
+
+                    b.HasKey("Date");
+
+                    b.ToTable("acc_fx_rates", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Modules.Accounting.Models.IngestRun", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("AccountId")
+                        .IsRequired()
+                        .HasMaxLength(30)
+                        .HasColumnType("varchar(30)");
+
+                    b.Property<bool>("Backfill")
+                        .HasColumnType("tinyint(1)");
+
+                    b.Property<decimal?>("BalanceAnchorBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<decimal?>("BalanceDeltaBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<int>("DuplicateEntries")
+                        .HasColumnType("int");
+
+                    b.Property<DateTime?>("FinishedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<DateTime?>("FromTimestamp")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<decimal?>("LedgerNetBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<string>("Message")
+                        .IsRequired()
+                        .HasMaxLength(1000)
+                        .HasColumnType("varchar(1000)");
+
+                    b.Property<int>("NewEntries")
+                        .HasColumnType("int");
+
+                    b.Property<DateTime>("StartedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<bool>("Success")
+                        .HasColumnType("tinyint(1)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AccountId", "StartedAt");
+
+                    b.ToTable("acc_ingest_runs", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Modules.Accounting.Models.LedgerEntry", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("AccountId")
+                        .IsRequired()
+                        .HasMaxLength(30)
+                        .HasColumnType("varchar(30)");
+
+                    b.Property<string>("AssetClass")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("Currency")
+                        .IsRequired()
+                        .HasMaxLength(5)
+                        .HasColumnType("varchar(5)");
+
+                    b.Property<string>("EventType")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<decimal>("FeeBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<decimal>("GrossBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<string>("IdempotencyKey")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("varchar(120)");
+
+                    b.Property<long>("IngestBatchId")
+                        .HasColumnType("bigint");
+
+                    b.Property<DateTime>("IngestedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<decimal>("NetBase")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<decimal>("PriceNative")
+                        .HasPrecision(18, 6)
+                        .HasColumnType("decimal(18,6)");
+
+                    b.Property<decimal>("Quantity")
+                        .HasPrecision(28, 8)
+                        .HasColumnType("decimal(28,8)");
+
+                    b.Property<string>("Side")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("Source")
+                        .IsRequired()
+                        .HasMaxLength(40)
+                        .HasColumnType("varchar(40)");
+
+                    b.Property<string>("Symbol")
+                        .IsRequired()
+                        .HasMaxLength(30)
+                        .HasColumnType("varchar(30)");
+
+                    b.Property<DateTime>("Timestamp")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("TransactionId")
+                        .IsRequired()
+                        .HasMaxLength(60)
+                        .HasColumnType("varchar(60)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EventType");
+
+                    b.HasIndex("IdempotencyKey")
+                        .IsUnique();
+
+                    b.HasIndex("AccountId", "Timestamp");
+
+                    b.ToTable("acc_ledger", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Modules.Accounting.Models.RawSnapshot", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("AccountId")
+                        .IsRequired()
+                        .HasMaxLength(30)
+                        .HasColumnType("varchar(30)");
+
+                    b.Property<DateTime>("CapturedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<long>("IngestRunId")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("Json")
+                        .IsRequired()
+                        .HasColumnType("longtext");
+
+                    b.Property<string>("SourceKind")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("IngestRunId");
+
+                    b.ToTable("acc_raw", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

src/IBKRTrader.Modules.Accounting/Models/FxRate.cs

@@ -0,0 +1,13 @@
+namespace IBKRTrader.Modules.Accounting.Models;
+
+/// <summary>
+/// Amtlicher FX-Tageskurs zur EUR-Ansicht (Tabelle acc_fx_rates). <see cref="UsdToEur"/> = wie viele
+/// EUR ein USD am <see cref="Date"/> wert war (EZB-Referenzkurs, Zielland-Ingest). Basiswährung ist
+/// USD; die EUR-Umrechnung liegt im <see cref="Logic.FxConverter"/> (Nearest-on-or-before).
+/// </summary>
+public class FxRate
+{
+    public DateTime Date { get; set; }        // nur Datum (Tag)
+    public decimal UsdToEur { get; set; }
+    public string Source { get; set; } = "";  // z. B. "ECB"
+}

src/IBKRTrader.Modules.Accounting/Models/IngestRun.cs

@@ -0,0 +1,28 @@
+namespace IBKRTrader.Modules.Accounting.Models;
+
+/// <summary>
+/// Protokoll eines Ingest-Laufs (Tabelle acc_ingest_runs): je Account ein Datensatz pro Abruf mit
+/// Zeitraum, Ergebnis (neu/Duplikate) und Balance-Anker (Soll-Ist als Vollständigkeits-Signal).
+/// </summary>
+public class IngestRun
+{
+    public long Id { get; set; }
+    public string AccountId { get; set; } = "";
+    public bool Backfill { get; set; }
+
+    public DateTime StartedAt { get; set; } = DateTime.UtcNow;
+    public DateTime? FinishedAt { get; set; }
+    public DateTime? FromTimestamp { get; set; }
+
+    public int NewEntries { get; set; }
+    public int DuplicateEntries { get; set; }
+    public bool Success { get; set; }
+    public string Message { get; set; } = "";
+
+    /// <summary>Vom Broker gemeldeter Kontosaldo (Basiswährung), falls verfügbar.</summary>
+    public decimal? BalanceAnchorBase { get; set; }
+    /// <summary>Σ NetBase des Ledgers (Buchhaltungs-Saldo).</summary>
+    public decimal? LedgerNetBase { get; set; }
+    /// <summary>Anker − Ledger (≈ 0 = vollständig).</summary>
+    public decimal? BalanceDeltaBase { get; set; }
+}

src/IBKRTrader.Modules.Accounting/Models/LedgerEntry.cs

@@ -0,0 +1,56 @@
+namespace IBKRTrader.Modules.Accounting.Models;
+
+/// <summary>
+/// Buchungssatz-Typ im neutralen Ledger (als String persistiert – erweiterbar). Deckt die
+/// IBKR-Aktienwelt ab: Trades, Dividenden, Zinsen, Gebühren, Quellensteuer und Ein-/Auszahlungen.
+/// </summary>
+public enum LedgerEventType
+{
+    TradeBuy,        // Kauf-Fill: Cash raus (Kosten + Kommission)
+    TradeSell,       // Verkauf-Fill: Cash rein (Erlös − Kommission)
+    Dividend,        // Dividende (Einnahme)
+    Interest,        // Broker-Zinsen (+/−)
+    Fee,             // eigenständige Gebühr/Kommission (Ausgabe)
+    TaxWithholding,  // einbehaltene Quellensteuer (Ausgabe)
+    Deposit,         // Einzahlung aufs Konto (Cash rein)
+    Withdrawal,      // Auszahlung vom Konto (Cash raus)
+    Other            // unbekannter Typ – roh erfasst, geldneutral bis geklärt
+}
+
+/// <summary>
+/// Unveränderlicher, normalisierter Buchungssatz (Tabelle acc_ledger). Buchungsgrundlage ist
+/// AUSSCHLIESSLICH die unabhängige IBKR-Quelle (Activity Flex Query), nie unsere eigene Trading-DB.
+/// Jeder Satz führt über <see cref="TransactionId"/> und den <see cref="IdempotencyKey"/> auf einen
+/// prüfbaren Nachweis zurück; überlappende Abrufe buchen dank des Unique-Keys nicht doppelt.
+///
+/// Geldbeträge liegen in der <b>Kontobasiswährung</b> (Flex liefert je Transaktion die Basiswährung
+/// + FX-Rate); die native Handelswährung/Preis bleiben zusätzlich für den Prüf-/Detail-View erhalten.
+/// Vorzeichenkonvention <see cref="NetBase"/>: Cash-Wirkung aufs Konto (+ Zufluss / − Abfluss).
+/// </summary>
+public class LedgerEntry
+{
+    public long Id { get; set; }                        // Autoincrement-PK
+    public string AccountId { get; set; } = "";         // IBKR-Kontocode (z. B. U1234567 / DU… Paper)
+    public LedgerEventType EventType { get; set; }
+    public DateTime Timestamp { get; set; }             // Ereigniszeit (UTC)
+
+    public string Symbol { get; set; } = "";            // Ticker
+    public string AssetClass { get; set; } = "";        // STK, OPT, …
+    public string Currency { get; set; } = "";          // native Handelswährung
+    public string Side { get; set; } = "";              // BUY/SELL bei Trades
+
+    public decimal Quantity { get; set; }               // Stück
+    public decimal PriceNative { get; set; }            // Preis je Stück (native Währung)
+    public decimal GrossBase { get; set; }              // absolute Bruttobewegung (Basiswährung)
+    public decimal FeeBase { get; set; }                // Kommission/Gebühr (Basiswährung)
+    public decimal NetBase { get; set; }                // signierte Cash-Wirkung (Basiswährung, +/−)
+
+    public string TransactionId { get; set; } = "";     // IBKR tradeID / transactionID
+    public string Source { get; set; } = "";            // "ibkr-flex"
+
+    public long IngestBatchId { get; set; }             // = IngestRun.Id
+    public DateTime IngestedAt { get; set; } = DateTime.UtcNow;
+
+    /// <summary>Stabiler Idempotenz-Schlüssel (unique). Gleiches Ereignis ⇒ gleicher Schlüssel.</summary>
+    public string IdempotencyKey { get; set; } = "";
+}

src/IBKRTrader.Modules.Accounting/Models/RawInputs.cs

@@ -0,0 +1,43 @@
+namespace IBKRTrader.Modules.Accounting.Models;
+
+/// <summary>
+/// Roh-Ausführung aus dem IBKR-Kontoauszug (Activity Flex Query, &lt;Trade&gt;). Bereits auf die
+/// Buchungsfelder reduziert: native Handelswährung/Preis für den Detail-View, Brutto/Kommission
+/// bereits in Kontobasiswährung (Flex liefert je Trade die FX-Rate zur Basiswährung). Die pure
+/// <see cref="Logic.AccountingClassifier"/> übernimmt daraus Typ, Vorzeichen und Idempotenz-Key.
+/// </summary>
+public sealed record RawExecution
+{
+    public string AccountId { get; init; } = "";
+    public string TradeId { get; init; } = "";
+    public DateTime Timestamp { get; init; }
+    public string Symbol { get; init; } = "";
+    public string AssetClass { get; init; } = "";
+    public string Currency { get; init; } = "";       // native
+    public string Side { get; init; } = "";            // BUY / SELL
+    public decimal Quantity { get; init; }
+    public decimal PriceNative { get; init; }
+    public decimal GrossBase { get; init; }            // absolute Notional in Basiswährung
+    public decimal FeeBase { get; init; }              // Kommission (Basiswährung, absolut)
+
+    /// <summary>Rohzeile (JSON/XML) für den Nachweis-Snapshot.</summary>
+    public string RawJson { get; init; } = "";
+}
+
+/// <summary>
+/// Roh-Kassenbewegung aus dem IBKR-Kontoauszug (&lt;CashTransaction&gt;): Dividenden, Quellensteuer,
+/// Zinsen, Ein-/Auszahlungen, Gebühren. <see cref="AmountBase"/> ist der signierte Betrag in
+/// Kontobasiswährung, wie im Auszug ausgewiesen (+ Zufluss / − Abfluss).
+/// </summary>
+public sealed record RawCashTransaction
+{
+    public string AccountId { get; init; } = "";
+    public string TransactionId { get; init; } = "";
+    public DateTime Timestamp { get; init; }
+    public string Type { get; init; } = "";            // IBKR-Typ ("Dividends", "Withholding Tax", …)
+    public string Symbol { get; init; } = "";
+    public string Currency { get; init; } = "";
+    public decimal AmountBase { get; init; }           // signierter Betrag (Basiswährung)
+
+    public string RawJson { get; init; } = "";
+}

src/IBKRTrader.Modules.Accounting/Models/RawSnapshot.cs

@@ -0,0 +1,15 @@
+namespace IBKRTrader.Modules.Accounting.Models;
+
+/// <summary>
+/// Rohdaten-Schnappschuss je Ingest-Batch (Tabelle acc_raw): die unveränderte Quell-Antwort als
+/// Nachweis + für Reproduzierbarkeit, zusätzlich zu den normalisierten Ledger-Sätzen.
+/// </summary>
+public class RawSnapshot
+{
+    public long Id { get; set; }
+    public long IngestRunId { get; set; }
+    public string AccountId { get; set; } = "";
+    public string SourceKind { get; set; } = "";   // "trades" / "cash"
+    public string Json { get; set; } = "";
+    public DateTime CapturedAt { get; set; } = DateTime.UtcNow;
+}

src/IBKRTrader.Modules.Accounting/Persistence/AccountingDbContext.cs

@@ -0,0 +1,96 @@
+using IBKRTrader.Core.Configuration;
+using IBKRTrader.Modules.Accounting.Models;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+
+namespace IBKRTrader.Modules.Accounting.Persistence;
+
+/// <summary>
+/// EF-Kontext des Accounting-Moduls (gleiche MariaDB, Tabellen mit Präfix acc_). Append-only Ledger mit
+/// Autoincrement-PKs und Unique-Index auf dem Idempotenz-Schlüssel (kein Doppel-Buchen).
+/// </summary>
+public class AccountingDbContext : DbContext
+{
+    public AccountingDbContext(DbContextOptions<AccountingDbContext> options) : base(options) { }
+
+    public DbSet<LedgerEntry> Ledger       => Set<LedgerEntry>();
+    public DbSet<IngestRun>   IngestRuns   => Set<IngestRun>();
+    public DbSet<RawSnapshot> RawSnapshots => Set<RawSnapshot>();
+    public DbSet<FxRate>      FxRates      => Set<FxRate>();
+
+    protected override void OnModelCreating(ModelBuilder b)
+    {
+        b.Entity<LedgerEntry>(e =>
+        {
+            e.ToTable("acc_ledger");
+            e.HasKey(x => x.Id);
+            e.Property(x => x.Id).ValueGeneratedOnAdd();
+            e.Property(x => x.AccountId).HasMaxLength(30);
+            e.Property(x => x.EventType).HasConversion<string>().HasMaxLength(20);
+            e.Property(x => x.Symbol).HasMaxLength(30);
+            e.Property(x => x.AssetClass).HasMaxLength(10);
+            e.Property(x => x.Currency).HasMaxLength(5);
+            e.Property(x => x.Side).HasMaxLength(10);
+            e.Property(x => x.Source).HasMaxLength(40);
+            e.Property(x => x.TransactionId).HasMaxLength(60);
+            e.Property(x => x.IdempotencyKey).HasMaxLength(120);
+            e.Property(x => x.Quantity).HasPrecision(28, 8);
+            e.Property(x => x.PriceNative).HasPrecision(18, 6);
+            e.Property(x => x.GrossBase).HasPrecision(28, 8);
+            e.Property(x => x.FeeBase).HasPrecision(28, 8);
+            e.Property(x => x.NetBase).HasPrecision(28, 8);
+            e.HasIndex(x => x.IdempotencyKey).IsUnique();       // Idempotenz: kein Doppel-Buchen
+            e.HasIndex(x => new { x.AccountId, x.Timestamp });
+            e.HasIndex(x => x.EventType);
+        });
+
+        b.Entity<IngestRun>(e =>
+        {
+            e.ToTable("acc_ingest_runs");
+            e.HasKey(x => x.Id);
+            e.Property(x => x.Id).ValueGeneratedOnAdd();
+            e.Property(x => x.AccountId).HasMaxLength(30);
+            e.Property(x => x.Message).HasMaxLength(1000);
+            e.Property(x => x.BalanceAnchorBase).HasPrecision(28, 8);
+            e.Property(x => x.LedgerNetBase).HasPrecision(28, 8);
+            e.Property(x => x.BalanceDeltaBase).HasPrecision(28, 8);
+            e.HasIndex(x => new { x.AccountId, x.StartedAt });
+        });
+
+        b.Entity<RawSnapshot>(e =>
+        {
+            e.ToTable("acc_raw");
+            e.HasKey(x => x.Id);
+            e.Property(x => x.Id).ValueGeneratedOnAdd();
+            e.Property(x => x.AccountId).HasMaxLength(30);
+            e.Property(x => x.SourceKind).HasMaxLength(20);
+            e.Property(x => x.Json).HasColumnType("longtext");
+            e.HasIndex(x => x.IngestRunId);
+        });
+
+        b.Entity<FxRate>(e =>
+        {
+            e.ToTable("acc_fx_rates");
+            e.HasKey(x => x.Date);
+            e.Property(x => x.Date).HasColumnType("date");
+            e.Property(x => x.UsdToEur).HasPrecision(18, 8);
+            e.Property(x => x.Source).HasMaxLength(40);
+        });
+    }
+}
+
+/// <summary>Design-Time-Factory für EF-Tooling (dotnet ef). Connection aus env IBKRTRADER_MYSQL.</summary>
+public class AccountingDbContextFactory : IDesignTimeDbContextFactory<AccountingDbContext>
+{
+    public AccountingDbContext CreateDbContext(string[] args)
+    {
+        var conn = Environment.GetEnvironmentVariable("IBKRTRADER_MYSQL")
+            ?? "Server=localhost;Port=3306;Database=ibkrtrader;User ID=root;Password=;";
+
+        var options = new DbContextOptionsBuilder<AccountingDbContext>()
+            .UseMySql(conn, DatabaseServerVersion.Value)
+            .Options;
+
+        return new AccountingDbContext(options);
+    }
+}

src/IBKRTrader.Modules.Accounting/Persistence/Repositories.cs

@@ -0,0 +1,163 @@
+using IBKRTrader.Modules.Accounting.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace IBKRTrader.Modules.Accounting.Persistence;
+
+/// <summary>Append-only Ledger-Zugriff mit idempotentem Upsert (Doppel-Buchen ausgeschlossen).</summary>
+public interface ILedgerRepository
+{
+    /// <summary>Fügt den Satz ein, falls sein IdempotencyKey neu ist. true = neu gebucht, false = Duplikat.</summary>
+    bool Upsert(LedgerEntry entry);
+    DateTime? LatestTimestamp(string accountId);
+    decimal SumNet(string accountId);
+    int Count(string accountId);
+    List<string> DistinctAccounts();
+    List<LedgerEntry> Query(string? accountId, DateTime? from, DateTime? to, int limit);
+    /// <summary>ALLE Sätze des Scopes bis <paramref name="to"/> (für die Abrechnung inkl. Anfangssaldo).</summary>
+    List<LedgerEntry> GetUpTo(string? accountId, DateTime to);
+}
+
+public interface IIngestRunRepository
+{
+    void Insert(IngestRun run);   // setzt Id
+    void Update(IngestRun run);
+    List<IngestRun> GetRecent(string? accountId, int limit);
+}
+
+public interface IRawSnapshotRepository
+{
+    void Insert(RawSnapshot snapshot);
+}
+
+/// <summary>Amtliche FX-Tageskurse (USD→EUR), versioniert. Upsert je Datum.</summary>
+public interface IFxRateRepository
+{
+    void Upsert(FxRate rate);
+    List<FxRate> GetAll();
+}
+
+// ---------------- EF-Implementierungen ----------------
+
+public sealed class EfLedgerRepository : ILedgerRepository
+{
+    private readonly IDbContextFactory<AccountingDbContext> _dbf;
+    public EfLedgerRepository(IDbContextFactory<AccountingDbContext> dbf) => _dbf = dbf;
+
+    public bool Upsert(LedgerEntry entry)
+    {
+        using var db = _dbf.CreateDbContext();
+        bool exists = db.Ledger.AsNoTracking().Any(x => x.IdempotencyKey == entry.IdempotencyKey);
+        if (exists) return false;
+        db.Ledger.Add(entry);
+        db.SaveChanges();
+        return true;
+    }
+
+    public DateTime? LatestTimestamp(string accountId)
+    {
+        using var db = _dbf.CreateDbContext();
+        return db.Ledger.AsNoTracking()
+            .Where(x => x.AccountId == accountId)
+            .OrderByDescending(x => x.Timestamp)
+            .Select(x => (DateTime?)x.Timestamp)
+            .FirstOrDefault();
+    }
+
+    public decimal SumNet(string accountId)
+    {
+        using var db = _dbf.CreateDbContext();
+        return db.Ledger.AsNoTracking().Where(x => x.AccountId == accountId).Sum(x => (decimal?)x.NetBase) ?? 0m;
+    }
+
+    public int Count(string accountId)
+    {
+        using var db = _dbf.CreateDbContext();
+        return db.Ledger.AsNoTracking().Count(x => x.AccountId == accountId);
+    }
+
+    public List<string> DistinctAccounts()
+    {
+        using var db = _dbf.CreateDbContext();
+        return db.Ledger.AsNoTracking().Select(x => x.AccountId).Distinct().OrderBy(x => x).ToList();
+    }
+
+    public List<LedgerEntry> Query(string? accountId, DateTime? from, DateTime? to, int limit)
+    {
+        using var db = _dbf.CreateDbContext();
+        var q = db.Ledger.AsNoTracking().AsQueryable();
+        if (!string.IsNullOrEmpty(accountId)) q = q.Where(x => x.AccountId == accountId);
+        if (from.HasValue) q = q.Where(x => x.Timestamp >= from.Value);
+        if (to.HasValue) q = q.Where(x => x.Timestamp <= to.Value);
+        return q.OrderByDescending(x => x.Timestamp).Take(limit).ToList();
+    }
+
+    public List<LedgerEntry> GetUpTo(string? accountId, DateTime to)
+    {
+        using var db = _dbf.CreateDbContext();
+        var q = db.Ledger.AsNoTracking().Where(x => x.Timestamp <= to);
+        if (!string.IsNullOrEmpty(accountId)) q = q.Where(x => x.AccountId == accountId);
+        return q.OrderBy(x => x.Timestamp).ToList();
+    }
+}
+
+public sealed class EfIngestRunRepository : IIngestRunRepository
+{
+    private readonly IDbContextFactory<AccountingDbContext> _dbf;
+    public EfIngestRunRepository(IDbContextFactory<AccountingDbContext> dbf) => _dbf = dbf;
+
+    public void Insert(IngestRun run)
+    {
+        using var db = _dbf.CreateDbContext();
+        db.IngestRuns.Add(run);
+        db.SaveChanges();   // füllt run.Id (Autoincrement)
+    }
+
+    public void Update(IngestRun run)
+    {
+        using var db = _dbf.CreateDbContext();
+        db.IngestRuns.Update(run);
+        db.SaveChanges();
+    }
+
+    public List<IngestRun> GetRecent(string? accountId, int limit)
+    {
+        using var db = _dbf.CreateDbContext();
+        var q = db.IngestRuns.AsNoTracking().AsQueryable();
+        if (!string.IsNullOrEmpty(accountId)) q = q.Where(x => x.AccountId == accountId);
+        return q.OrderByDescending(x => x.StartedAt).Take(limit).ToList();
+    }
+}
+
+public sealed class EfRawSnapshotRepository : IRawSnapshotRepository
+{
+    private readonly IDbContextFactory<AccountingDbContext> _dbf;
+    public EfRawSnapshotRepository(IDbContextFactory<AccountingDbContext> dbf) => _dbf = dbf;
+
+    public void Insert(RawSnapshot snapshot)
+    {
+        using var db = _dbf.CreateDbContext();
+        db.RawSnapshots.Add(snapshot);
+        db.SaveChanges();
+    }
+}
+
+public sealed class EfFxRateRepository : IFxRateRepository
+{
+    private readonly IDbContextFactory<AccountingDbContext> _dbf;
+    public EfFxRateRepository(IDbContextFactory<AccountingDbContext> dbf) => _dbf = dbf;
+
+    public void Upsert(FxRate rate)
+    {
+        using var db = _dbf.CreateDbContext();
+        var existing = db.FxRates.Find(rate.Date.Date);
+        if (existing == null) db.FxRates.Add(new FxRate { Date = rate.Date.Date, UsdToEur = rate.UsdToEur, Source = rate.Source });
+        else { existing.UsdToEur = rate.UsdToEur; existing.Source = rate.Source; }
+        db.SaveChanges();
+    }
+
+    public List<FxRate> GetAll()
+    {
+        using var db = _dbf.CreateDbContext();
+        return db.FxRates.AsNoTracking().OrderBy(x => x.Date).ToList();
+    }
+}

src/IBKRTrader.Modules.Accounting/Services/AccountingIngestService.cs

@@ -0,0 +1,145 @@
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Modules.Accounting.Logic;
+using IBKRTrader.Modules.Accounting.Models;
+using IBKRTrader.Modules.Accounting.Persistence;
+using Microsoft.Extensions.Hosting;
+
+namespace IBKRTrader.Modules.Accounting.Services;
+
+/// <summary>
+/// Ingest-Orchestrierung: erhebt je Konto die unabhängige Buchungsgrundlage aus dem IBKR-Kontoauszug
+/// (Flex Query), klassifiziert sie pur (<see cref="AccountingClassifier"/>) und bucht sie idempotent in
+/// den append-only Ledger. Protokolliert jeden Lauf (acc_ingest_runs) inkl. Balance-Anker (Soll-Ist).
+/// Rein LESEND – keine Orders. Der Abruf liegt hinter Interfaces; mit den Null-Quellen läuft das Modul
+/// offline (bucht korrekt nichts). Testbarer Kern: <see cref="IngestAccountAsync"/>.
+/// </summary>
+public sealed class AccountingIngestService : BackgroundService
+{
+    /// <summary>Sicherheits-Überlappung gegen Auszugs-Lag beim inkrementellen Abruf.</summary>
+    internal const int IncrementalLookbackHours = 24;
+
+    private static readonly TimeSpan Interval = TimeSpan.FromHours(6);
+
+    private readonly IAccountingAccountSource _accounts;
+    private readonly ILedgerRepository        _ledger;
+    private readonly IIngestRunRepository     _runs;
+    private readonly IRawSnapshotRepository   _raw;
+    private readonly IStatementSource         _statement;
+    private readonly IBalanceAnchorSource     _balance;
+    private readonly LoggingService           _logger;
+
+    public AccountingIngestService(
+        IAccountingAccountSource accounts, ILedgerRepository ledger, IIngestRunRepository runs,
+        IRawSnapshotRepository raw, IStatementSource statement, IBalanceAnchorSource balance,
+        LoggingService logger)
+    {
+        _accounts  = accounts;
+        _ledger    = ledger;
+        _runs      = runs;
+        _raw       = raw;
+        _statement = statement;
+        _balance   = balance;
+        _logger    = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        try { await Task.Delay(TimeSpan.FromMinutes(1), stoppingToken); }   // nach Core-Init
+        catch (OperationCanceledException) { return; }
+
+        _logger.Info("Accounting", "Accounting-Ingest gestartet (unabhängiger IBKR-Flex-Abruf, read-only).");
+
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try { await IngestAllAsync(backfill: false, stoppingToken); }
+            catch (OperationCanceledException) { break; }
+            catch (Exception ex) { _logger.Error("Accounting", $"Accounting-Ingest Fehler: {ex.Message}", ex); }
+
+            try { await Task.Delay(Interval, stoppingToken); }
+            catch (OperationCanceledException) { break; }
+        }
+    }
+
+    /// <summary>Ein Durchlauf über alle bekannten Konten (offline: keine → nichts zu tun).</summary>
+    public async Task IngestAllAsync(bool backfill, CancellationToken ct)
+    {
+        var accounts = await _accounts.GetAccountIdsAsync(ct);
+        foreach (var accountId in accounts)
+        {
+            if (ct.IsCancellationRequested) break;
+            var run = await IngestAccountAsync(accountId, backfill, ct);
+            if (run.NewEntries > 0 || !run.Success)
+                _logger.Info("Accounting", $"📒 {accountId}: {run.Message}" +
+                    (run.BalanceDeltaBase.HasValue ? $" (Balance-Δ {run.BalanceDeltaBase:F2})" : ""));
+        }
+    }
+
+    /// <summary>
+    /// Testbarer Kern: erhebt + bucht einen Account, protokolliert den Lauf inkl. Balance-Anker.
+    /// Fehler brechen den Gesamt-Ingest nicht (im Run vermerkt).
+    /// </summary>
+    public async Task<IngestRun> IngestAccountAsync(string accountId, bool backfill, CancellationToken ct)
+    {
+        var run = new IngestRun { AccountId = accountId, Backfill = backfill, StartedAt = DateTime.UtcNow };
+        _runs.Insert(run);                       // Id vergeben → dient als IngestBatchId
+        long batchId = run.Id;
+        int newCount = 0, dupCount = 0;
+
+        try
+        {
+            DateTime? since = backfill
+                ? null
+                : _ledger.LatestTimestamp(accountId)?.AddHours(-IncrementalLookbackHours);
+            run.FromTimestamp = since;
+
+            // 1) Ausführungen (Käufe/Verkäufe)
+            var executions = await _statement.GetExecutionsAsync(accountId, since, ct);
+            if (executions.Count > 0)
+                _raw.Insert(new RawSnapshot { IngestRunId = batchId, AccountId = accountId, SourceKind = "trades", Json = SnapshotJson(executions.Select(x => x.RawJson)) });
+            foreach (var x in executions)
+            {
+                var entry = AccountingClassifier.ClassifyExecution(x, batchId);
+                if (_ledger.Upsert(entry)) newCount++; else dupCount++;
+            }
+
+            // 2) Kassenbewegungen (Dividenden, Steuer, Zinsen, Ein-/Auszahlungen)
+            var cash = await _statement.GetCashTransactionsAsync(accountId, since, ct);
+            if (cash.Count > 0)
+                _raw.Insert(new RawSnapshot { IngestRunId = batchId, AccountId = accountId, SourceKind = "cash", Json = SnapshotJson(cash.Select(x => x.RawJson)) });
+            foreach (var c in cash)
+            {
+                var entry = AccountingClassifier.ClassifyCashTransaction(c, batchId);
+                if (_ledger.Upsert(entry)) newCount++; else dupCount++;
+            }
+
+            // 3) Balance-Anker (Vollständigkeits-Wächter)
+            decimal? anchor = await _balance.GetBalanceAsync(accountId, ct);
+            decimal ledgerNet = _ledger.SumNet(accountId);
+            run.BalanceAnchorBase = anchor;
+            run.LedgerNetBase = ledgerNet;
+            run.BalanceDeltaBase = anchor.HasValue ? anchor.Value - ledgerNet : null;
+
+            run.NewEntries = newCount;
+            run.DuplicateEntries = dupCount;
+            run.Success = true;
+            run.Message = $"{newCount} neu, {dupCount} Duplikate ({(backfill ? "Backfill" : "inkrementell")}).";
+        }
+        catch (Exception ex)
+        {
+            run.Success = false;
+            run.NewEntries = newCount;
+            run.DuplicateEntries = dupCount;
+            run.Message = $"Fehler: {ex.Message}";
+        }
+
+        run.FinishedAt = DateTime.UtcNow;
+        _runs.Update(run);
+        return run;
+    }
+
+    private static string SnapshotJson(IEnumerable<string> rawItems)
+    {
+        var items = rawItems.Where(s => !string.IsNullOrEmpty(s)).ToList();
+        return items.Count == 0 ? "[]" : "[" + string.Join(",", items) + "]";
+    }
+}

src/IBKRTrader.Modules.Accounting/Services/AccountingReportService.cs

@@ -0,0 +1,45 @@
+using IBKRTrader.Modules.Accounting.Logic;
+using IBKRTrader.Modules.Accounting.Persistence;
+
+namespace IBKRTrader.Modules.Accounting.Services;
+
+/// <summary>Anzeige-Währung einer Abrechnung: Umrechnungsfaktor (aus Basiswährung) + dokumentierter Hinweis.</summary>
+public sealed record CurrencyView(string Code, decimal Factor, string Note);
+
+/// <summary>
+/// Baut die neutrale Periodenabrechnung + Monatsvergleich (via <see cref="AccountingEngine"/>) und
+/// stellt Währungs-Views bereit: USD (Basiswährung, Faktor 1) sofort; EUR über den EZB-Kurs am
+/// Periodenende (Näherung für Aggregate, im Hinweis dokumentiert – exakte tagesgenaue Umrechnung liegt
+/// im <see cref="FxConverter"/> auf Transaktionsebene).
+/// </summary>
+public sealed class AccountingReportService
+{
+    private readonly ILedgerRepository _ledger;
+    private readonly IFxRateRepository _fx;
+
+    public AccountingReportService(ILedgerRepository ledger, IFxRateRepository fx)
+    {
+        _ledger = ledger;
+        _fx = fx;
+    }
+
+    public PeriodStatement BuildStatement(string? accountId, DateTime from, DateTime to) =>
+        AccountingEngine.BuildStatement(_ledger.GetUpTo(accountId, to), from, to, accountId);
+
+    public List<PeriodStatement> BuildMonthly(string? accountId, DateTime from, DateTime to) =>
+        AccountingEngine.BuildMonthlyBreakdown(_ledger.GetUpTo(accountId, to), from, to, accountId);
+
+    /// <summary>Währungs-View für die übergebene Anzeige-Währung (USD/EUR), bezogen auf das Periodenende.</summary>
+    public CurrencyView GetCurrencyView(string code, DateTime periodEnd)
+    {
+        if (string.Equals(code, "EUR", StringComparison.OrdinalIgnoreCase))
+        {
+            var conv = new FxConverter(_fx.GetAll());
+            var rate = conv.UsdToEurOn(periodEnd);
+            return rate.HasValue
+                ? new CurrencyView("EUR", rate.Value, $"USD→EUR-Kurs am {periodEnd:yyyy-MM-dd} (EZB, Näherung für Aggregate)")
+                : new CurrencyView("USD", 1m, "Kein EZB-Kurs für EUR verfügbar – Anzeige in Basiswährung USD.");
+        }
+        return new CurrencyView("USD", 1m, "Basiswährung USD");
+    }
+}

src/IBKRTrader.Modules.Accounting/Services/IngestSources.cs

@@ -0,0 +1,53 @@
+using IBKRTrader.Modules.Accounting.Models;
+
+namespace IBKRTrader.Modules.Accounting.Services;
+
+/// <summary>
+/// Unabhängige IBKR-Kontoauszugs-Quelle (Activity Flex Query). Interface, damit die Buchungslogik ohne
+/// Live-Abruf testbar/offline lauffähig ist; die Live-Implementierung (Zielland) ruft den Flex Web
+/// Service (Token + Query-Id) ab, mappt die XML auf <see cref="RawExecution"/>/<see cref="RawCashTransaction"/>
+/// und speichert den Rohschnappschuss. Der Flex-Abruf braucht KEINE laufende TWS-Socket-Verbindung.
+/// </summary>
+public interface IStatementSource
+{
+    /// <summary>Ausführungen ab <paramref name="since"/> (null = volle Historie/Backfill).</summary>
+    Task<IReadOnlyList<RawExecution>> GetExecutionsAsync(string accountId, DateTime? since, CancellationToken ct);
+
+    /// <summary>Kassenbewegungen (Dividenden, Steuer, Zinsen, Ein-/Auszahlungen) ab <paramref name="since"/>.</summary>
+    Task<IReadOnlyList<RawCashTransaction>> GetCashTransactionsAsync(string accountId, DateTime? since, CancellationToken ct);
+}
+
+/// <summary>Kontosaldo (Basiswährung) als Balance-Anker (Soll-Ist). Live-Impl über Flex/TWS (Zielland).</summary>
+public interface IBalanceAnchorSource
+{
+    Task<decimal?> GetBalanceAsync(string accountId, CancellationToken ct);
+}
+
+/// <summary>Liefert die zu erfassenden IBKR-Kontocodes. Offline leer → der Ingest bucht nichts.</summary>
+public interface IAccountingAccountSource
+{
+    Task<IReadOnlyList<string>> GetAccountIdsAsync(CancellationToken ct);
+}
+
+// ---------------- Offline-Null-Stubs (Muster wie NullBrokerClient) ----------------
+
+/// <summary>Das Modul läuft ohne Live-Anbindung vollständig; der Ingest bucht dann korrekt nichts.</summary>
+public sealed class NullStatementSource : IStatementSource
+{
+    public Task<IReadOnlyList<RawExecution>> GetExecutionsAsync(string accountId, DateTime? since, CancellationToken ct)
+        => Task.FromResult((IReadOnlyList<RawExecution>)Array.Empty<RawExecution>());
+
+    public Task<IReadOnlyList<RawCashTransaction>> GetCashTransactionsAsync(string accountId, DateTime? since, CancellationToken ct)
+        => Task.FromResult((IReadOnlyList<RawCashTransaction>)Array.Empty<RawCashTransaction>());
+}
+
+public sealed class NullBalanceAnchorSource : IBalanceAnchorSource
+{
+    public Task<decimal?> GetBalanceAsync(string accountId, CancellationToken ct) => Task.FromResult((decimal?)null);
+}
+
+public sealed class NullAccountSource : IAccountingAccountSource
+{
+    public Task<IReadOnlyList<string>> GetAccountIdsAsync(CancellationToken ct)
+        => Task.FromResult((IReadOnlyList<string>)Array.Empty<string>());
+}

src/IBKRTrader.Modules.Accounting/Ui/AccountingMainForm.cs

@@ -0,0 +1,302 @@
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Modules.Accounting.Logic;
+using IBKRTrader.Modules.Accounting.Persistence;
+using IBKRTrader.Modules.Accounting.Services;
+
+namespace IBKRTrader.Modules.Accounting.Ui;
+
+/// <summary>
+/// Fenster des Accounting-Moduls: Übersicht/BWA, Ledger, Steuer (Platzhalter), Abrechnung/Export,
+/// Abruf/Status. Alle DB-Zugriffe laufen NUR auf Nutzer-Interaktion (nicht im Konstruktor) – so
+/// konstruiert der Smoke-UI-Check das Fenster auch ohne DB fehlerfrei.
+/// </summary>
+public sealed class AccountingMainForm : Form
+{
+    private readonly ILedgerRepository       _ledger;
+    private readonly IIngestRunRepository    _runs;
+    private readonly AccountingReportService _report;
+    private readonly AccountingIngestService _ingest;
+    private readonly LoggingService          _logger;
+
+    private readonly DateTimePicker _from     = new() { Format = DateTimePickerFormat.Short, Width = 110 };
+    private readonly DateTimePicker _to       = new() { Format = DateTimePickerFormat.Short, Width = 110 };
+    private readonly ComboBox       _account  = new() { DropDownStyle = ComboBoxStyle.DropDown, Width = 140 };
+    private readonly ComboBox       _currency = new() { DropDownStyle = ComboBoxStyle.DropDownList, Width = 80 };
+
+    private readonly Label         _kpis    = new() { AutoSize = true, Location = new Point(12, 8) };
+    private readonly DataGridView  _monthly = new() { Dock = DockStyle.Fill, ReadOnly = true, AllowUserToAddRows = false, RowHeadersVisible = false, AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill };
+    private readonly DataGridView  _ledgerGrid = new() { Dock = DockStyle.Fill, ReadOnly = true, AllowUserToAddRows = false, RowHeadersVisible = false, AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill };
+    private readonly DataGridView  _runsGrid   = new() { Dock = DockStyle.Fill, ReadOnly = true, AllowUserToAddRows = false, RowHeadersVisible = false, AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill };
+    private readonly Label         _status  = new() { AutoSize = true, ForeColor = SystemColors.GrayText, Location = new Point(12, 8) };
+
+    public AccountingMainForm(
+        ILedgerRepository ledger, IIngestRunRepository runs, AccountingReportService report,
+        AccountingIngestService ingest, LoggingService logger)
+    {
+        _ledger = ledger;
+        _runs   = runs;
+        _report = report;
+        _ingest = ingest;
+        _logger = logger;
+
+        Text          = "Accounting";
+        Width         = 1000;
+        Height        = 680;
+        StartPosition = FormStartPosition.CenterScreen;
+        MinimumSize   = new Size(760, 480);
+
+        _from.Value = DateTime.Today.AddMonths(-1);
+        _to.Value   = DateTime.Today;
+        _currency.Items.AddRange(new object[] { "USD", "EUR" });
+        _currency.SelectedIndex = 0;
+
+        BuildLayout();
+    }
+
+    private void BuildLayout()
+    {
+        var tabs = new TabControl { Dock = DockStyle.Fill };
+
+        // ── gemeinsame Filterleiste ──
+        var filter = new FlowLayoutPanel { Dock = DockStyle.Top, Height = 40, Padding = new Padding(8, 6, 8, 0) };
+        filter.Controls.Add(new Label { Text = "Von", AutoSize = true, Margin = new Padding(0, 8, 4, 0) });
+        filter.Controls.Add(_from);
+        filter.Controls.Add(new Label { Text = "Bis", AutoSize = true, Margin = new Padding(8, 8, 4, 0) });
+        filter.Controls.Add(_to);
+        filter.Controls.Add(new Label { Text = "Konto", AutoSize = true, Margin = new Padding(8, 8, 4, 0) });
+        filter.Controls.Add(_account);
+        filter.Controls.Add(new Label { Text = "Währung", AutoSize = true, Margin = new Padding(8, 8, 4, 0) });
+        filter.Controls.Add(_currency);
+        var btnRefresh = new Button { Text = "Aktualisieren", Width = 120, Margin = new Padding(12, 3, 0, 0) };
+        btnRefresh.Click += (_, _) => RefreshAll();
+        filter.Controls.Add(btnRefresh);
+
+        // ── Tab: Übersicht/BWA ──
+        var tabOverview = new TabPage("Übersicht / BWA");
+        _monthly.Top = 90;
+        var overviewPanel = new Panel { Dock = DockStyle.Fill };
+        overviewPanel.Controls.Add(_monthly);
+        var kpiPanel = new Panel { Dock = DockStyle.Top, Height = 84 };
+        kpiPanel.Controls.Add(_kpis);
+        overviewPanel.Controls.Add(kpiPanel);
+        tabOverview.Controls.Add(overviewPanel);
+
+        // ── Tab: Ledger ──
+        var tabLedger = new TabPage("Ledger");
+        tabLedger.Controls.Add(_ledgerGrid);
+
+        // ── Tab: Steuer (Platzhalter) ──
+        var tabTax = new TabPage("Steuer");
+        tabTax.Controls.Add(new Label
+        {
+            Dock = DockStyle.Fill, Padding = new Padding(16),
+            Text = "Steuerliche Einordnung ist noch offen (Jurisdiktion nicht festgelegt).\n\n" +
+                   "Der neutrale Ledger und die Periodenabrechnung sind davon unabhängig gültig.\n" +
+                   "Eine konkrete Steuerschicht (z. B. DE-Kapitalertragsteuer oder US Form 8949 / Schedule D)\n" +
+                   "wird hier später als klar dokumentierte, prüfbare Rechenschicht ergänzt.\n\n" +
+                   "Hinweis: Dies ist keine Steuerberatung."
+        });
+
+        // ── Tab: Abrechnung / Export ──
+        var tabExport = new TabPage("Abrechnung / Export");
+        var exportPanel = new FlowLayoutPanel { Dock = DockStyle.Fill, Padding = new Padding(16), FlowDirection = FlowDirection.TopDown };
+        exportPanel.Controls.Add(new Label { AutoSize = true, Text = "Exportiert die aktuelle Auswahl (Zeitraum / Konto / Währung):" });
+        var btnCsvLedger = new Button { Text = "Ledger als CSV…", Width = 180, Margin = new Padding(0, 8, 0, 0) };
+        btnCsvLedger.Click += (_, _) => ExportCsvLedger();
+        var btnCsvStmt = new Button { Text = "Abrechnung als CSV…", Width = 180, Margin = new Padding(0, 8, 0, 0) };
+        btnCsvStmt.Click += (_, _) => ExportCsvStatement();
+        var btnPdf = new Button { Text = "Abrechnung als PDF…", Width = 180, Margin = new Padding(0, 8, 0, 0) };
+        btnPdf.Click += (_, _) => ExportPdf();
+        exportPanel.Controls.Add(btnCsvLedger);
+        exportPanel.Controls.Add(btnCsvStmt);
+        exportPanel.Controls.Add(btnPdf);
+        tabExport.Controls.Add(exportPanel);
+
+        // ── Tab: Abruf / Status ──
+        var tabIngest = new TabPage("Abruf / Status");
+        var ingestButtons = new FlowLayoutPanel { Dock = DockStyle.Top, Height = 40, Padding = new Padding(8, 6, 8, 0) };
+        var btnIncr = new Button { Text = "Inkrementell abrufen", Width = 160 };
+        btnIncr.Click += async (_, _) => await RunIngest(backfill: false);
+        var btnBackfill = new Button { Text = "Backfill (voll)", Width = 140, Margin = new Padding(8, 0, 0, 0) };
+        btnBackfill.Click += async (_, _) => await RunIngest(backfill: true);
+        ingestButtons.Controls.Add(btnIncr);
+        ingestButtons.Controls.Add(btnBackfill);
+        var statusPanel = new Panel { Dock = DockStyle.Top, Height = 40 };
+        statusPanel.Controls.Add(_status);
+        _status.Text = "Offline-Standard: keine Live-Quelle registriert → der Ingest bucht nichts (korrekt).";
+        tabIngest.Controls.Add(_runsGrid);
+        tabIngest.Controls.Add(statusPanel);
+        tabIngest.Controls.Add(ingestButtons);
+
+        tabs.TabPages.AddRange(new[] { tabOverview, tabLedger, tabTax, tabExport, tabIngest });
+
+        Controls.Add(tabs);
+        Controls.Add(filter);
+    }
+
+    // ── Daten laden (nur auf Interaktion) ──
+
+    private string? SelectedAccount()
+    {
+        var text = _account.Text?.Trim();
+        return string.IsNullOrWhiteSpace(text) || text == "(alle)" ? null : text;
+    }
+
+    private void RefreshAll()
+    {
+        try
+        {
+            LoadAccounts();
+            LoadOverview();
+            LoadLedger();
+            LoadRuns();
+        }
+        catch (Exception ex)
+        {
+            _logger.Error("Accounting", $"UI-Refresh fehlgeschlagen: {ex.Message}", ex);
+            MessageBox.Show(this, ex.Message, "Fehler", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+        }
+    }
+
+    private void LoadAccounts()
+    {
+        var current = _account.Text;
+        _account.Items.Clear();
+        _account.Items.Add("(alle)");
+        foreach (var a in _ledger.DistinctAccounts()) _account.Items.Add(a);
+        _account.Text = string.IsNullOrEmpty(current) ? "(alle)" : current;
+    }
+
+    private void LoadOverview()
+    {
+        DateTime from = _from.Value.Date, to = _to.Value.Date.AddDays(1).AddTicks(-1);
+        var stmt = _report.BuildStatement(SelectedAccount(), from, to);
+        var view = _report.GetCurrencyView(_currency.Text, to);
+        decimal C(decimal v) => Math.Round(v * view.Factor, 2);
+
+        _kpis.Text =
+            $"Netto-Handelsergebnis: {C(stmt.NetTradingResult):N2} {view.Code}    " +
+            $"Handelsvolumen: {C(stmt.TradeVolume):N2}    Dividenden: {C(stmt.Dividends):N2}    Fees: {C(stmt.Fees):N2}\n" +
+            $"Einzahlungen: {C(stmt.Deposits):N2}    Auszahlungen: {C(stmt.Withdrawals):N2}    " +
+            $"Endsaldo: {C(stmt.ClosingBalance):N2}    Trades: {stmt.TradeCount}    Buchungen: {stmt.EntryCount}\n" +
+            $"{view.Note}";
+
+        var monthly = _report.BuildMonthly(SelectedAccount(), from, to)
+            .Select(m => new
+            {
+                Monat = m.From.ToString("yyyy-MM"),
+                Anfang = C(m.OpeningBalance),
+                Einzahlungen = C(m.Deposits),
+                Auszahlungen = C(m.Withdrawals),
+                Volumen = C(m.TradeVolume),
+                Fees = C(m.Fees),
+                Ergebnis = C(m.NetTradingResult),
+                Endsaldo = C(m.ClosingBalance)
+            }).ToList();
+        _monthly.DataSource = monthly;
+    }
+
+    private void LoadLedger()
+    {
+        DateTime from = _from.Value.Date, to = _to.Value.Date.AddDays(1).AddTicks(-1);
+        var rows = _ledger.Query(SelectedAccount(), from, to, 2000)
+            .Select(e => new
+            {
+                Zeit = e.Timestamp, e.AccountId, Typ = e.EventType.ToString(), e.Side, e.Symbol,
+                e.Currency, e.Quantity, Preis = e.PriceNative, Brutto = e.GrossBase, Fee = e.FeeBase,
+                Netto = e.NetBase, e.TransactionId
+            }).ToList();
+        _ledgerGrid.DataSource = rows;
+    }
+
+    private void LoadRuns()
+    {
+        var rows = _runs.GetRecent(SelectedAccount(), 100)
+            .Select(r => new
+            {
+                r.AccountId, Start = r.StartedAt, Ende = r.FinishedAt, r.Backfill,
+                Neu = r.NewEntries, Duplikate = r.DuplicateEntries, r.Success,
+                Anker = r.BalanceAnchorBase, LedgerNetto = r.LedgerNetBase, Delta = r.BalanceDeltaBase, r.Message
+            }).ToList();
+        _runsGrid.DataSource = rows;
+    }
+
+    // ── Export ──
+
+    private void ExportCsvLedger()
+    {
+        DateTime from = _from.Value.Date, to = _to.Value.Date.AddDays(1).AddTicks(-1);
+        var entries = _ledger.Query(SelectedAccount(), from, to, 100000);
+        SaveText("ledger.csv", "CSV|*.csv", CsvExporter.Ledger(entries));
+    }
+
+    private void ExportCsvStatement()
+    {
+        DateTime from = _from.Value.Date, to = _to.Value.Date.AddDays(1).AddTicks(-1);
+        var stmt = _report.BuildStatement(SelectedAccount(), from, to);
+        SaveText("abrechnung.csv", "CSV|*.csv", CsvExporter.Statement(stmt));
+    }
+
+    private void ExportPdf()
+    {
+        try
+        {
+            DateTime from = _from.Value.Date, to = _to.Value.Date.AddDays(1).AddTicks(-1);
+            var account = SelectedAccount();
+            var stmt = _report.BuildStatement(account, from, to);
+            var monthly = _report.BuildMonthly(account, from, to);
+            var entries = _ledger.Query(account, from, to, 100000).OrderBy(e => e.Timestamp).ToList();
+            var view = _report.GetCurrencyView(_currency.Text, to);
+
+            byte[] pdf = PdfExporter.Render(stmt, monthly, entries, view.Code, view.Factor, view.Note);
+
+            using var dlg = new SaveFileDialog { FileName = "abrechnung.pdf", Filter = "PDF|*.pdf" };
+            if (dlg.ShowDialog(this) == DialogResult.OK)
+            {
+                File.WriteAllBytes(dlg.FileName, pdf);
+                _logger.Info("Accounting", $"PDF-Abrechnung geschrieben: {dlg.FileName}");
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.Error("Accounting", $"PDF-Export fehlgeschlagen: {ex.Message}", ex);
+            MessageBox.Show(this, ex.Message, "Fehler", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+        }
+    }
+
+    private void SaveText(string suggested, string filter, string content)
+    {
+        try
+        {
+            using var dlg = new SaveFileDialog { FileName = suggested, Filter = filter };
+            if (dlg.ShowDialog(this) == DialogResult.OK)
+            {
+                File.WriteAllText(dlg.FileName, content);
+                _logger.Info("Accounting", $"Export geschrieben: {dlg.FileName}");
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.Error("Accounting", $"Export fehlgeschlagen: {ex.Message}", ex);
+            MessageBox.Show(this, ex.Message, "Fehler", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+        }
+    }
+
+    // ── Ingest ──
+
+    private async Task RunIngest(bool backfill)
+    {
+        try
+        {
+            _status.Text = backfill ? "Backfill läuft…" : "Inkrementeller Abruf läuft…";
+            await _ingest.IngestAllAsync(backfill, CancellationToken.None);
+            _status.Text = $"Abruf abgeschlossen ({DateTime.Now:HH:mm:ss}).";
+            LoadRuns();
+        }
+        catch (Exception ex)
+        {
+            _status.Text = $"Fehler: {ex.Message}";
+            _logger.Error("Accounting", $"Manueller Ingest fehlgeschlagen: {ex.Message}", ex);
+        }
+    }
+}

src/IBKRTrader.Modules.Supervisor/Agent/ArchitectureContext.cs

@@ -0,0 +1,53 @@
+namespace IBKRTrader.Modules.Supervisor.Agent;
+
+/// <summary>
+/// Kuratiertes Architektur-/Verhaltensdokument von IBKRTrader – der System-Kontext des Agenten
+/// („so entscheidet und handelt die Software"). Bewusst destilliertes Verhalten statt Code-Dump; bei
+/// Änderungen am Geld-Pfad mitpflegen. Inline gehalten (versioniert mit dem Code).
+/// </summary>
+public static class ArchitectureContext
+{
+    public static string Load() => Text;
+
+    private const string Text =
+"""
+# IBKRTrader – Architektur & Verhalten (Supervisor-Kontext)
+
+## Grundaufbau
+- Harter Core + unabhängige Strategie-Module + Launcher. Module referenzieren nur den Core, nie einander.
+- Persistenz: EF Core / MariaDB. Core-Tabellen `core_*`, je Modul eigener Präfix (`ct_`, `acc_`, `sup_`).
+- Generic Host; Worker/Services laufen als IHostedService.
+
+## Handels-Pipeline (ExecutionService)
+Module übergeben ein `TradeSignal` (Symbol, Side, SourceModule, optional LimitPrice/SuggestedNotional,
+SignalId). Der Core prüft in fester Reihenfolge:
+1. Globaler Hauptschalter `TradingEnabled` (Default AUS) → sonst Decision=Skipped, Reason=TradingDisabled.
+2. Kurs vom Broker → fehlt er, Decision=Skipped, Reason=NoQuote.
+3. Konto + bestehende Exposure/Position.
+4. Risikoprüfung (RiskService) mit MaxTradePercent, MaxPositionPercentPerModule, MaxSlippagePercent →
+   Ablehnung: Decision=Rejected, Reason=RiskRejected (Begründung im Message/ContextJson).
+5. Order platzieren (Broker). Erfolg → Decision=Executed, Reason=OrderPlaced; Fehler → Decision=Failed,
+   Reason=OrderFailed. Order-Events (Placed/Filled/PlaceFailed) landen in core_order_events.
+6. Buchung: Fill → Position/Budget/Trade-Historie; die SignalId wird durchgereicht.
+
+## Sicherer Standard
+Broker ist standardmäßig `NullBrokerClient` (handelt nie), bis der echte IBKR-Adapter (TWS API / IB
+Gateway) verifiziert ist. Ohne `TradingEnabled=true` wird nie gehandelt.
+
+## Datenfundament für Analyse
+- `core_decision_journal`: JEDE Entscheidung (Executed/Rejected/Skipped/Failed) mit ReasonCode, strukturiert.
+- `core_order_events`: Order-Lifecycle als Daten.
+- `core_trade_history`: gebuchte Fills (BUY/SELL), inkl. SignalId zur Korrelation.
+- JSONL-Logs `Logs/{yyyy-MM-dd}.jsonl`: eine Zeile je Event (ts, level, source, cid=SignalId, message).
+- Die SignalId verbindet Signal → Entscheidung(en) → Order(s) → Trade → Log-Zeilen (= das Dossier).
+
+## Realisierte GuV / KPIs
+Fills werden per FIFO-Lot-Matching (RealizedPnlEngine) zu realisierten Round-Trips; daraus KPIs
+(NetPnl, Winrate, ProfitFactor). Long-only-Sicht.
+
+## Module (aktuell)
+- CongressTrading (`ct_`): kopiert US-Kongress-Aktien-Trades → TradeSignal.
+- Accounting (`acc_`): unabhängiger IBKR-Kontoauszug → append-only Ledger + Abrechnung (KEIN Handel).
+- Supervisor (`sup_`): DU – read-only Analyse/Forensik über alle Module.
+""";
+}

src/IBKRTrader.Modules.Supervisor/Agent/ChatModels.cs

@@ -0,0 +1,33 @@
+namespace IBKRTrader.Modules.Supervisor.Agent;
+
+/// <summary>Chat-Nachricht im OpenAI-/OpenRouter-Schema (Rollen: system/user/assistant/tool).</summary>
+public sealed class ChatMessage
+{
+    public string  Role    { get; init; } = "user";
+    public string? Content { get; init; }
+
+    /// <summary>Vom Modell angeforderte Tool-Aufrufe (nur Rolle assistant).</summary>
+    public List<ToolCall>? ToolCalls { get; init; }
+
+    /// <summary>Bezug auf den beantworteten Tool-Aufruf (nur Rolle tool).</summary>
+    public string? ToolCallId { get; init; }
+
+    public static ChatMessage System(string content) => new() { Role = "system", Content = content };
+    public static ChatMessage User(string content)   => new() { Role = "user", Content = content };
+    public static ChatMessage Assistant(string? content, List<ToolCall>? toolCalls = null) =>
+        new() { Role = "assistant", Content = content, ToolCalls = toolCalls };
+    public static ChatMessage ToolResult(string toolCallId, string content) =>
+        new() { Role = "tool", ToolCallId = toolCallId, Content = content };
+}
+
+/// <summary>Ein Tool-Aufruf des Modells (Function-Calling).</summary>
+public sealed record ToolCall(string Id, string Name, string ArgumentsJson);
+
+/// <summary>Antwort des Modells: Text ODER Tool-Aufrufe (oder beides).</summary>
+public sealed class ChatResponse
+{
+    public string?         Content          { get; init; }
+    public List<ToolCall>  ToolCalls        { get; init; } = new();
+    public int             PromptTokens     { get; init; }
+    public int             CompletionTokens { get; init; }
+}

src/IBKRTrader.Modules.Supervisor/Agent/OpenRouterClient.cs

@@ -0,0 +1,161 @@
+using System.Net.Http;
+using System.Text;
+using System.Text.Json;
+
+namespace IBKRTrader.Modules.Supervisor.Agent;
+
+/// <summary>Chat-Completion-Client (Function-Calling). Interface, damit der Agent testbar ist.</summary>
+public interface IChatCompletionClient
+{
+    Task<ChatResponse> CompleteAsync(string model, IReadOnlyList<ChatMessage> messages,
+        IReadOnlyList<SupervisorTool> tools, CancellationToken ct);
+}
+
+/// <summary>
+/// OpenRouter-Client (OpenAI-kompatibles Chat-Completions-Schema inkl. Tools). API-Key:
+/// Umgebungsvariable IBKRTRADER_OPENROUTER_KEY, sonst gitignorierte Datei openrouter.key im App-Ordner –
+/// GETRENNT von künftigen Trading-Keys (Supervisor-Konzept §5).
+/// SICHERHEIT: OpenRouter ist ein bewusst freigegebener externer Datenempfänger; es werden ausschließlich
+/// Analyse-Daten der Tools gesendet, niemals Secrets/Keys/Connection-Strings.
+/// </summary>
+public sealed class OpenRouterClient : IChatCompletionClient
+{
+    public const string Endpoint = "https://openrouter.ai/api/v1/chat/completions";
+
+    private readonly HttpClient    _http;
+    private readonly Func<string?> _apiKeyProvider;
+
+    public OpenRouterClient(HttpClient http, Func<string?>? apiKeyProvider = null)
+    {
+        _http = http;
+        _apiKeyProvider = apiKeyProvider ?? DefaultApiKeyProvider;
+    }
+
+    /// <summary>Key aus env IBKRTRADER_OPENROUTER_KEY, sonst aus gitignorierter openrouter.key.</summary>
+    public static string? DefaultApiKeyProvider()
+    {
+        string? key = Environment.GetEnvironmentVariable("IBKRTRADER_OPENROUTER_KEY");
+        if (!string.IsNullOrWhiteSpace(key)) return key.Trim();
+        string file = Path.Combine(AppContext.BaseDirectory, "openrouter.key");
+        return File.Exists(file) ? File.ReadAllText(file).Trim() : null;
+    }
+
+    public async Task<ChatResponse> CompleteAsync(string model, IReadOnlyList<ChatMessage> messages,
+        IReadOnlyList<SupervisorTool> tools, CancellationToken ct)
+    {
+        string? apiKey = _apiKeyProvider();
+        if (string.IsNullOrWhiteSpace(apiKey))
+            throw new InvalidOperationException(
+                "Kein OpenRouter-API-Key. Setze IBKRTRADER_OPENROUTER_KEY (Umgebungsvariable) oder lege die " +
+                "Datei 'openrouter.key' in den App-Ordner (gitignored). Separater Key für den Supervisor empfohlen.");
+
+        string body = BuildRequestBody(model, messages, tools);
+        using var request = new HttpRequestMessage(HttpMethod.Post, Endpoint);
+        request.Headers.Add("Authorization", $"Bearer {apiKey}");
+        request.Headers.Add("X-Title", "IBKRTrader Supervisor");
+        request.Content = new StringContent(body, Encoding.UTF8, "application/json");
+
+        using var response = await _http.SendAsync(request, ct);
+        string json = await response.Content.ReadAsStringAsync(ct);
+        if (!response.IsSuccessStatusCode)
+            throw new InvalidOperationException($"OpenRouter-Fehler {(int)response.StatusCode}: {Truncate(json, 500)}");
+
+        return ParseResponse(json);
+    }
+
+    // ----- pure, testbare Serialisierung -----
+
+    internal static string BuildRequestBody(string model, IReadOnlyList<ChatMessage> messages, IReadOnlyList<SupervisorTool> tools)
+    {
+        using var ms = new MemoryStream();
+        using (var w = new Utf8JsonWriter(ms))
+        {
+            w.WriteStartObject();
+            w.WriteString("model", model);
+
+            w.WriteStartArray("messages");
+            foreach (var m in messages)
+            {
+                w.WriteStartObject();
+                w.WriteString("role", m.Role);
+                if (m.Content != null) w.WriteString("content", m.Content);
+                else w.WriteNull("content");
+                if (m.ToolCalls is { Count: > 0 })
+                {
+                    w.WriteStartArray("tool_calls");
+                    foreach (var tc in m.ToolCalls)
+                    {
+                        w.WriteStartObject();
+                        w.WriteString("id", tc.Id);
+                        w.WriteString("type", "function");
+                        w.WriteStartObject("function");
+                        w.WriteString("name", tc.Name);
+                        w.WriteString("arguments", tc.ArgumentsJson);
+                        w.WriteEndObject();
+                        w.WriteEndObject();
+                    }
+                    w.WriteEndArray();
+                }
+                if (m.ToolCallId != null) w.WriteString("tool_call_id", m.ToolCallId);
+                w.WriteEndObject();
+            }
+            w.WriteEndArray();
+
+            if (tools.Count > 0)
+            {
+                w.WriteStartArray("tools");
+                foreach (var t in tools)
+                {
+                    w.WriteStartObject();
+                    w.WriteString("type", "function");
+                    w.WriteStartObject("function");
+                    w.WriteString("name", t.Name);
+                    w.WriteString("description", t.Description);
+                    w.WritePropertyName("parameters");
+                    using (var doc = JsonDocument.Parse(t.ParametersJsonSchema))
+                        doc.RootElement.WriteTo(w);
+                    w.WriteEndObject();
+                    w.WriteEndObject();
+                }
+                w.WriteEndArray();
+            }
+
+            w.WriteEndObject();
+        }
+        return Encoding.UTF8.GetString(ms.ToArray());
+    }
+
+    internal static ChatResponse ParseResponse(string json)
+    {
+        using var doc = JsonDocument.Parse(json);
+        var root = doc.RootElement;
+        var message = root.GetProperty("choices")[0].GetProperty("message");
+
+        string? content = message.TryGetProperty("content", out var c) && c.ValueKind == JsonValueKind.String
+            ? c.GetString() : null;
+
+        var toolCalls = new List<ToolCall>();
+        if (message.TryGetProperty("tool_calls", out var tcs) && tcs.ValueKind == JsonValueKind.Array)
+        {
+            foreach (var tc in tcs.EnumerateArray())
+            {
+                string id = tc.TryGetProperty("id", out var idProp) ? idProp.GetString() ?? "" : "";
+                var fn = tc.GetProperty("function");
+                toolCalls.Add(new ToolCall(id,
+                    fn.GetProperty("name").GetString() ?? "",
+                    fn.TryGetProperty("arguments", out var a) ? a.GetString() ?? "{}" : "{}"));
+            }
+        }
+
+        int promptTokens = 0, completionTokens = 0;
+        if (root.TryGetProperty("usage", out var usage))
+        {
+            if (usage.TryGetProperty("prompt_tokens", out var pt)) promptTokens = pt.GetInt32();
+            if (usage.TryGetProperty("completion_tokens", out var ctk)) completionTokens = ctk.GetInt32();
+        }
+
+        return new ChatResponse { Content = content, ToolCalls = toolCalls, PromptTokens = promptTokens, CompletionTokens = completionTokens };
+    }
+
+    private static string Truncate(string s, int max) => s.Length <= max ? s : s[..max] + "…";
+}

src/IBKRTrader.Modules.Supervisor/Agent/SupervisorAgent.cs

@@ -0,0 +1,106 @@
+namespace IBKRTrader.Modules.Supervisor.Agent;
+
+/// <summary>Ergebnis einer Agenten-Anfrage inkl. transparenter Tool-Aufruf-Historie.</summary>
+public sealed class AgentResult
+{
+    public string Answer { get; init; } = "";
+    public List<(string Tool, string Arguments, string Result)> ToolInvocations { get; init; } = new();
+    public int PromptTokens     { get; init; }
+    public int CompletionTokens { get; init; }
+}
+
+/// <summary>
+/// Der Analyse-Agent: Function-Calling-Loop gegen einen <see cref="IChatCompletionClient"/> mit der
+/// read-only <see cref="SupervisorToolRegistry"/>. System-Kontext = Arbeitsanweisung + Architektur-
+/// Dokument + Profil-Fokus. Harte Iterationsgrenze gegen Endlosschleifen; jeder Tool-Aufruf wird
+/// festgehalten (Nachvollziehbarkeit in der UI). Nicht freigegebene Tools werden nicht ausgeführt.
+/// </summary>
+public sealed class SupervisorAgent
+{
+    public const int MaxIterations = 8;
+    public const string DefaultModel = "openrouter/auto";
+
+    private readonly IChatCompletionClient  _chat;
+    private readonly SupervisorToolRegistry _tools;
+
+    public SupervisorAgent(IChatCompletionClient chat, SupervisorToolRegistry tools)
+    {
+        _chat = chat;
+        _tools = tools;
+    }
+
+    private static string SystemPrompt(SupervisorProfile profile)
+    {
+        string basePrompt =
+            "Du bist der Supervisor von IBKRTrader: ein Analyse-Agent für automatisierten Aktienhandel über " +
+            "Interactive Brokers. Du bist strikt read-only – du kannst und darfst nicht handeln. Nutze die " +
+            "Tools, um Entscheidungsjournal, Order-Events, Trades und Logs abzufragen, BEVOR du Schlüsse " +
+            "ziehst. Zitiere konkrete Daten (SignalIds, Zeiten, Preise, ReasonCodes). Antworte auf Deutsch, " +
+            "präzise und mit klarer Schlussfolgerung.";
+        if (!string.IsNullOrEmpty(profile.PromptAddendum))
+            basePrompt += "\n\n" + profile.PromptAddendum;
+        return basePrompt + "\n\n=== ARCHITEKTUR-KONTEXT ===\n" + ArchitectureContext.Load();
+    }
+
+    private IReadOnlyList<SupervisorTool> ToolsFor(SupervisorProfile profile) =>
+        profile.ToolFilter == null
+            ? _tools.Tools
+            : _tools.Tools.Where(t => Array.Exists(profile.ToolFilter, n =>
+                string.Equals(n, t.Name, StringComparison.OrdinalIgnoreCase))).ToList();
+
+    /// <summary>Beantwortet eine Analyse-Frage. <paramref name="progress"/> meldet Tool-Aufrufe live an die UI.</summary>
+    public async Task<AgentResult> AskAsync(string question, string? model = null,
+        IProgress<string>? progress = null, SupervisorProfile? profile = null, CancellationToken ct = default)
+    {
+        var activeProfile = profile ?? SupervisorProfiles.Allgemein;
+        var activeTools = ToolsFor(activeProfile);
+        var allowed = activeTools.Select(t => t.Name).ToHashSet(StringComparer.OrdinalIgnoreCase);
+        var messages = new List<ChatMessage>
+        {
+            ChatMessage.System(SystemPrompt(activeProfile)),
+            ChatMessage.User(question)
+        };
+        var invocations = new List<(string, string, string)>();
+        int promptTokens = 0, completionTokens = 0;
+        string usedModel = string.IsNullOrWhiteSpace(model) ? DefaultModel : model.Trim();
+
+        for (int step = 0; step < MaxIterations; step++)
+        {
+            ct.ThrowIfCancellationRequested();
+
+            var response = await _chat.CompleteAsync(usedModel, messages, activeTools, ct);
+            promptTokens += response.PromptTokens;
+            completionTokens += response.CompletionTokens;
+
+            if (response.ToolCalls.Count == 0)
+            {
+                return new AgentResult
+                {
+                    Answer = response.Content ?? "(keine Antwort)",
+                    ToolInvocations = invocations,
+                    PromptTokens = promptTokens,
+                    CompletionTokens = completionTokens
+                };
+            }
+
+            messages.Add(ChatMessage.Assistant(response.Content, response.ToolCalls));
+            foreach (var call in response.ToolCalls)
+            {
+                progress?.Report($"🔧 {call.Name}({call.ArgumentsJson})");
+                string result = allowed.Contains(call.Name)
+                    ? _tools.Execute(call.Name, call.ArgumentsJson)
+                    : $"FEHLER: Tool '{call.Name}' ist für dieses Profil nicht freigegeben.";
+                invocations.Add((call.Name, call.ArgumentsJson, result));
+                messages.Add(ChatMessage.ToolResult(call.Id, result));
+            }
+        }
+
+        return new AgentResult
+        {
+            Answer = "Abbruch: maximale Tool-Iterationen erreicht (Frage ggf. eingrenzen).",
+            ToolInvocations = invocations,
+            PromptTokens = promptTokens,
+            CompletionTokens = completionTokens
+        };
+    }
+}

src/IBKRTrader.Modules.Supervisor/Agent/SupervisorProfiles.cs

@@ -0,0 +1,41 @@
+namespace IBKRTrader.Modules.Supervisor.Agent;
+
+/// <summary>
+/// Ein Supervisor-Profil: Fokus-Anweisung + optionales Tool-Subset über EINER gemeinsamen
+/// Agent-Infrastruktur (bewusst KEINE Agent-zu-Agent-Orchestrierung). Modul-Wissen kommt aus dem
+/// Architektur-Kontext; hier nur der Fokus.
+/// </summary>
+public sealed record SupervisorProfile(string Name, string PromptAddendum, string[]? ToolFilter)
+{
+    public override string ToString() => Name;
+}
+
+/// <summary>Die eingebauten Profile.</summary>
+public static class SupervisorProfiles
+{
+    public static readonly SupervisorProfile Allgemein = new(
+        "Allgemein",
+        "",
+        null);
+
+    public static readonly SupervisorProfile Technik = new(
+        "Technik",
+        "FOKUS TECHNIK-SUPERVISOR: Du prüfst ausschließlich die technische Gesundheit — Fehler-/Warning-" +
+        "Muster in den Logs, fehlgeschlagene/stornierte Orders, Broker-Fehlerantworten, auffällige Latenzen " +
+        "und Lücken in den Datenketten. KEINE Strategie-Bewertung (ob ein Trade klug war, ist nicht dein " +
+        "Thema — nur ob die Software korrekt funktioniert hat).",
+        new[] { "read_logs", "query_order_events", "query_decisions", "get_dossier", "get_architecture_context" });
+
+    public static readonly SupervisorProfile CongressTrading = new(
+        "CongressTrading",
+        "FOKUS CONGRESSTRADING-SUPERVISOR: Du bewertest die CongressTrading-Strategie — Qualität der " +
+        "kopierten Signale vs. Ausführung, Reject-Muster (haben die Risk-Limits kluge oder schädliche " +
+        "Entscheidungen getroffen?), realisierte GuV je Symbol. Filtere Daten auf module='CT'.",
+        null);
+
+    public static IReadOnlyList<SupervisorProfile> All { get; } =
+        new[] { Allgemein, Technik, CongressTrading };
+
+    public static SupervisorProfile ByName(string? name) =>
+        All.FirstOrDefault(p => string.Equals(p.Name, name, StringComparison.OrdinalIgnoreCase)) ?? Allgemein;
+}

src/IBKRTrader.Modules.Supervisor/Agent/SupervisorToolRegistry.cs

@@ -0,0 +1,58 @@
+using System.Text.Json;
+
+namespace IBKRTrader.Modules.Supervisor.Agent;
+
+/// <summary>
+/// Ein read-only-Analyse-Tool des Supervisors: Name, Beschreibung, JSON-Schema der Parameter und die
+/// Ausführung. Tools LESEN ausschließlich (Journal, Events, Trades, Logs, KPIs) – es gibt bewusst keinen
+/// Mechanismus, der handeln, canceln oder schreiben könnte.
+/// </summary>
+public sealed record SupervisorTool(
+    string Name,
+    string Description,
+    string ParametersJsonSchema,
+    Func<JsonElement, string> Execute);
+
+/// <summary>
+/// Transport-agnostische Tool-Registry: vom In-Prozess-Agenten genutzt und zusätzlich über MCP-Light
+/// exponierbar. Ausführung ist fehlertolerant – eine Tool-Exception wird als Fehlertext an das Modell
+/// zurückgegeben, nie geworfen.
+/// </summary>
+public sealed class SupervisorToolRegistry
+{
+    private readonly Dictionary<string, SupervisorTool> _tools = new(StringComparer.OrdinalIgnoreCase);
+
+    public IReadOnlyList<SupervisorTool> Tools => _tools.Values.ToList();
+
+    public void Register(SupervisorTool tool) => _tools[tool.Name] = tool;
+
+    public string Execute(string name, string argumentsJson)
+    {
+        if (!_tools.TryGetValue(name, out var tool))
+            return $"FEHLER: Unbekanntes Tool '{name}'. Verfügbar: {string.Join(", ", _tools.Keys)}";
+
+        try
+        {
+            using var doc = JsonDocument.Parse(string.IsNullOrWhiteSpace(argumentsJson) ? "{}" : argumentsJson);
+            return tool.Execute(doc.RootElement.Clone());
+        }
+        catch (JsonException ex)
+        {
+            return $"FEHLER: Ungültige Tool-Argumente (kein JSON): {ex.Message}";
+        }
+        catch (Exception ex)
+        {
+            return $"FEHLER bei Tool '{name}': {ex.Message}";
+        }
+    }
+
+    // ----- Argument-Helfer für Tool-Implementierungen -----
+
+    public static string? GetString(JsonElement args, string name) =>
+        args.ValueKind == JsonValueKind.Object && args.TryGetProperty(name, out var v) && v.ValueKind == JsonValueKind.String
+            ? v.GetString() : null;
+
+    public static int? GetInt(JsonElement args, string name) =>
+        args.ValueKind == JsonValueKind.Object && args.TryGetProperty(name, out var v) && v.ValueKind == JsonValueKind.Number
+            ? v.GetInt32() : (int?)null;
+}

src/IBKRTrader.Modules.Supervisor/Agent/SupervisorTools.cs

@@ -0,0 +1,201 @@
+using System.Text.Json;
+using IBKRTrader.Core.Analytics;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence;
+using IBKRTrader.Modules.Supervisor.Persistence;
+using IBKRTrader.Modules.Supervisor.Services;
+
+namespace IBKRTrader.Modules.Supervisor.Agent;
+
+/// <summary>
+/// Baut die read-only Standard-Tool-Registry des Supervisors: Zugriffe auf Entscheidungsjournal,
+/// Order-Events, Trade-Log, Dossiers, JSONL-Logs, KPIs, Counterfactuals und das Architektur-Dokument.
+/// Alle Ergebnisse als kompakte JSON-/Markdown-Strings. KEIN Tool kann handeln oder schreiben.
+/// </summary>
+public static class SupervisorTools
+{
+    private static readonly JsonSerializerOptions JsonOpts = new()
+    {
+        Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping
+    };
+
+    public static SupervisorToolRegistry CreateRegistry(
+        IDecisionJournal journal,
+        IOrderEventLog orderEvents,
+        TradeLogReader trades,
+        DossierService dossiers,
+        ISupervisorCounterfactualRepository? counterfactuals = null)
+    {
+        var reg = new SupervisorToolRegistry();
+        string logsDir = Path.Combine(AppContext.BaseDirectory, "Logs");
+
+        reg.Register(new SupervisorTool(
+            "query_decisions",
+            "Fragt das Entscheidungsjournal ab (JEDE Handelsentscheidung inkl. Ablehnungen mit Grund). " +
+            "Filter optional: module, symbol, reason (z.B. RiskRejected), decision (Executed/Rejected/Skipped/Failed), sinceHours.",
+            """{"type":"object","properties":{"module":{"type":"string"},"symbol":{"type":"string"},"reason":{"type":"string"},"decision":{"type":"string"},"sinceHours":{"type":"integer"},"limit":{"type":"integer"}}}""",
+            args =>
+            {
+                int limit = Math.Clamp(SupervisorToolRegistry.GetInt(args, "limit") ?? 100, 1, 500);
+                string? module = SupervisorToolRegistry.GetString(args, "module");
+                string? symbol = SupervisorToolRegistry.GetString(args, "symbol");
+                string? reason = SupervisorToolRegistry.GetString(args, "reason");
+                string? decision = SupervisorToolRegistry.GetString(args, "decision");
+                int? sinceHours = SupervisorToolRegistry.GetInt(args, "sinceHours");
+                DateTime since = sinceHours.HasValue ? DateTime.UtcNow.AddHours(-sinceHours.Value) : DateTime.MinValue;
+
+                var rows = journal.Query(d =>
+                        (module == null || d.Module == module) &&
+                        (symbol == null || d.Symbol == symbol) &&
+                        d.Timestamp >= since, limit * 3)
+                    .Where(d => reason == null || string.Equals(d.Reason.ToString(), reason, StringComparison.OrdinalIgnoreCase))
+                    .Where(d => decision == null || string.Equals(d.Decision.ToString(), decision, StringComparison.OrdinalIgnoreCase))
+                    .Take(limit)
+                    .Select(d => new
+                    {
+                        d.SignalId, ts = d.Timestamp, d.Module, d.Symbol, d.Side, price = d.SignalPrice,
+                        decision = d.Decision.ToString(), reason = d.Reason.ToString(), d.Message, ctx = d.ContextJson
+                    });
+                return JsonSerializer.Serialize(rows, JsonOpts);
+            }));
+
+        reg.Register(new SupervisorTool(
+            "query_order_events",
+            "Fragt das Order-Lifecycle-Log ab (Platzierungen, Broker-Antworten, Fills, Cancels). " +
+            "Filter optional: module, symbol, signalId, sinceHours.",
+            """{"type":"object","properties":{"module":{"type":"string"},"symbol":{"type":"string"},"signalId":{"type":"string"},"sinceHours":{"type":"integer"},"limit":{"type":"integer"}}}""",
+            args =>
+            {
+                int limit = Math.Clamp(SupervisorToolRegistry.GetInt(args, "limit") ?? 100, 1, 500);
+                string? module = SupervisorToolRegistry.GetString(args, "module");
+                string? symbol = SupervisorToolRegistry.GetString(args, "symbol");
+                string? signalId = SupervisorToolRegistry.GetString(args, "signalId");
+                int? sinceHours = SupervisorToolRegistry.GetInt(args, "sinceHours");
+                DateTime since = sinceHours.HasValue ? DateTime.UtcNow.AddHours(-sinceHours.Value) : DateTime.MinValue;
+
+                var rows = orderEvents.Query(e =>
+                        (module == null || e.Module == module) &&
+                        (symbol == null || e.Symbol == symbol) &&
+                        (signalId == null || e.SignalId == signalId) &&
+                        e.Timestamp >= since, limit)
+                    .Select(e => new
+                    {
+                        e.SignalId, ts = e.Timestamp, e.Module, e.Symbol,
+                        eventType = e.EventType.ToString(), e.Side, e.Price, e.Quantity, e.OrderType,
+                        e.Response, details = e.DetailsJson
+                    });
+                return JsonSerializer.Serialize(rows, JsonOpts);
+            }));
+
+        reg.Register(new SupervisorTool(
+            "query_trades",
+            "Fragt gebuchte Fills aus der modulübergreifenden Trade-Historie ab. " +
+            "Filter optional: module, symbol, sinceDays.",
+            """{"type":"object","properties":{"module":{"type":"string"},"symbol":{"type":"string"},"sinceDays":{"type":"integer"},"limit":{"type":"integer"}}}""",
+            args =>
+            {
+                int limit = Math.Clamp(SupervisorToolRegistry.GetInt(args, "limit") ?? 100, 1, 500);
+                string? module = SupervisorToolRegistry.GetString(args, "module");
+                string? symbol = SupervisorToolRegistry.GetString(args, "symbol");
+                int? sinceDays = SupervisorToolRegistry.GetInt(args, "sinceDays");
+                DateTime since = sinceDays.HasValue ? DateTime.UtcNow.AddDays(-sinceDays.Value) : DateTime.MinValue;
+
+                var rows = trades.Query(module, symbol, since, limit)
+                    .Select(t => new
+                    {
+                        t.SignalId, t.Module, t.Symbol, t.Action, t.Quantity, t.Price, t.TotalValue,
+                        t.TradedAt, t.Status
+                    });
+                return JsonSerializer.Serialize(rows, JsonOpts);
+            }));
+
+        reg.Register(new SupervisorTool(
+            "get_dossier",
+            "Liefert das komplette Dossier zu einer SignalId als Markdown: Entscheidungskette, Order-Events, Trades, Log-Auszug.",
+            """{"type":"object","properties":{"signalId":{"type":"string"}},"required":["signalId"]}""",
+            args =>
+            {
+                string? signalId = SupervisorToolRegistry.GetString(args, "signalId");
+                if (string.IsNullOrWhiteSpace(signalId)) return "FEHLER: signalId fehlt.";
+                return DossierBuilder.ToMarkdown(dossiers.BuildForSignal(signalId));
+            }));
+
+        reg.Register(new SupervisorTool(
+            "read_logs",
+            "Liest die JSONL-Logdatei eines Tages (Datum yyyy-MM-dd), optional gefiltert nach level, cid (SignalId) und textFilter.",
+            """{"type":"object","properties":{"date":{"type":"string"},"level":{"type":"string"},"cid":{"type":"string"},"textFilter":{"type":"string"},"limit":{"type":"integer"}},"required":["date"]}""",
+            args =>
+            {
+                string? date = SupervisorToolRegistry.GetString(args, "date");
+                if (string.IsNullOrWhiteSpace(date)) return "FEHLER: date fehlt (yyyy-MM-dd).";
+                string path = Path.Combine(logsDir, $"{date}.jsonl");
+                if (!File.Exists(path)) return $"Keine JSONL-Datei für {date}.";
+
+                string? level = SupervisorToolRegistry.GetString(args, "level");
+                string? cid = SupervisorToolRegistry.GetString(args, "cid");
+                string? text = SupervisorToolRegistry.GetString(args, "textFilter");
+                int limit = Math.Clamp(SupervisorToolRegistry.GetInt(args, "limit") ?? 200, 1, 1000);
+
+                var lines = new List<LogJson.ParsedLogLine>();
+                foreach (var line in File.ReadLines(path))
+                {
+                    var p = LogJson.ParseLine(line);
+                    if (p == null) continue;
+                    if (level != null && !string.Equals(p.Level, level, StringComparison.OrdinalIgnoreCase)) continue;
+                    if (cid != null && p.Cid != cid) continue;
+                    if (text != null && !p.Message.Contains(text, StringComparison.OrdinalIgnoreCase)) continue;
+                    lines.Add(p);
+                    if (lines.Count >= limit) break;
+                }
+                return JsonSerializer.Serialize(lines, JsonOpts);
+            }));
+
+        reg.Register(new SupervisorTool(
+            "get_kpis",
+            "Berechnet Kennzahlen (Netto-PnL, Winrate, Ø-PnL, Profit-Faktor, Trade-Anzahl) über die " +
+            "Trade-Historie (FIFO-realisiert). Filter optional: module, sinceDays.",
+            """{"type":"object","properties":{"module":{"type":"string"},"sinceDays":{"type":"integer"}}}""",
+            args =>
+            {
+                string? module = SupervisorToolRegistry.GetString(args, "module");
+                int? sinceDays = SupervisorToolRegistry.GetInt(args, "sinceDays");
+                DateTime since = sinceDays.HasValue ? DateTime.UtcNow.AddDays(-sinceDays.Value) : DateTime.MinValue;
+
+                var fills = trades.ForKpis(module, since);
+                var k = TradeAnalytics.ComputeKpis(fills);
+                var byModule = TradeAnalytics.PnlByModule(fills);
+                return JsonSerializer.Serialize(new
+                {
+                    k.TradeCount, k.NetPnl, k.WinRatePct, k.AvgPnlPerTrade, k.ProfitFactor,
+                    byModule = byModule.Select(x => new { module = x.Key, x.Pnl, x.Count })
+                }, JsonOpts);
+            }));
+
+        reg.Register(new SupervisorTool(
+            "get_architecture_context",
+            "Liefert das kuratierte Architektur-/Verhaltensdokument von IBKRTrader (wie die Software entscheidet und handelt).",
+            """{"type":"object","properties":{}}""",
+            _ => ArchitectureContext.Load()));
+
+        if (counterfactuals != null)
+        {
+            reg.Register(new SupervisorTool(
+                "query_counterfactuals",
+                "Was wäre aus ABGELEHNTEN BUY-Signalen geworden? Liefert nach einer Wartezeit ausgewertete " +
+                "Rejects (Reason, Signalpreis, späterer Kurs, hypothetischer PnL je Stück) — zeigt, ob Risk-Limits Gewinne oder Verluste verhindert haben.",
+                """{"type":"object","properties":{"limit":{"type":"integer"}}}""",
+                args =>
+                {
+                    int limit = Math.Clamp(SupervisorToolRegistry.GetInt(args, "limit") ?? 200, 1, 500);
+                    var rows = counterfactuals.GetRecent(limit).Select(c => new
+                    {
+                        c.SignalId, c.CheckedAt, c.Module, c.Symbol, reason = c.Reason,
+                        signalPrice = c.SignalPrice, laterPrice = c.LaterPrice, pnlPerShare = c.HypotheticalPnlPerShare
+                    });
+                    return JsonSerializer.Serialize(rows, JsonOpts);
+                }));
+        }
+
+        return reg;
+    }
+}

src/IBKRTrader.Modules.Supervisor/Counterfactual/CounterfactualJob.cs

@@ -0,0 +1,106 @@
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence;
+using IBKRTrader.Core.Persistence.Entities;
+using IBKRTrader.Modules.Supervisor.Persistence;
+using Microsoft.Extensions.Hosting;
+
+namespace IBKRTrader.Modules.Supervisor.Counterfactual;
+
+/// <summary>
+/// Liefert den späteren Kurs eines abgelehnten Symbols (für die Counterfactual-Auswertung). Interface,
+/// damit der Job offline/testbar bleibt; die Live-Implementierung (Zielland) liest eine spätere
+/// Kursmarke (z. B. aus core_ibkr_market_data). Offline: Null-Stub → keine Auswertung.
+/// </summary>
+public interface ICounterfactualResolutionSource
+{
+    Task<decimal?> GetLaterPriceAsync(string symbol, DateTime afterUtc, CancellationToken ct);
+}
+
+/// <summary>Offline-Stub: kein späterer Kurs → der Job wertet nichts aus (bleibt korrekt leer).</summary>
+public sealed class NullCounterfactualResolutionSource : ICounterfactualResolutionSource
+{
+    public Task<decimal?> GetLaterPriceAsync(string symbol, DateTime afterUtc, CancellationToken ct)
+        => Task.FromResult((decimal?)null);
+}
+
+/// <summary>
+/// Wertet ABGELEHNTE BUY-Signale aus: „was wäre gewesen?". Nimmt Rejects, die älter als die Wartezeit
+/// sind, holt den späteren Kurs und speichert den hypothetischen GuV je Stück (einmalig je Entscheidung).
+/// Mit dem Null-Stub passiert nichts. Bricht den Prozess nie (fehlertolerant).
+/// </summary>
+public sealed class CounterfactualJob : BackgroundService
+{
+    /// <summary>Wartezeit, bevor ein Reject ausgewertet wird (Marktbewegung „danach").</summary>
+    internal const int EvaluationDelayDays = 7;
+    private static readonly TimeSpan Interval = TimeSpan.FromHours(12);
+
+    private readonly IDecisionJournal                    _journal;
+    private readonly ICounterfactualResolutionSource     _resolution;
+    private readonly ISupervisorCounterfactualRepository _repo;
+    private readonly LoggingService                      _logger;
+
+    public CounterfactualJob(
+        IDecisionJournal journal, ICounterfactualResolutionSource resolution,
+        ISupervisorCounterfactualRepository repo, LoggingService logger)
+    {
+        _journal    = journal;
+        _resolution = resolution;
+        _repo       = repo;
+        _logger     = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        try { await Task.Delay(TimeSpan.FromMinutes(2), stoppingToken); }
+        catch (OperationCanceledException) { return; }
+
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try { await EvaluateAsync(stoppingToken); }
+            catch (OperationCanceledException) { break; }
+            catch (Exception ex) { _logger.Error("Supervisor", $"Counterfactual-Job Fehler: {ex.Message}", ex); }
+
+            try { await Task.Delay(Interval, stoppingToken); }
+            catch (OperationCanceledException) { break; }
+        }
+    }
+
+    /// <summary>Testbarer Kern: bewertet fällige, noch nicht ausgewertete BUY-Rejects.</summary>
+    public async Task<int> EvaluateAsync(CancellationToken ct)
+    {
+        DateTime cutoff = DateTime.UtcNow.AddDays(-EvaluationDelayDays);
+        var candidates = _journal.Query(d =>
+                d.Decision == TradeDecision.Rejected && d.Side == "BUY" &&
+                d.Timestamp <= cutoff && d.SignalPrice > 0, 500);
+        if (candidates.Count == 0) return 0;
+
+        var already = _repo.ExistingDecisionIds(candidates.Select(c => c.Id));
+        int written = 0;
+
+        foreach (var d in candidates)
+        {
+            if (ct.IsCancellationRequested) break;
+            if (already.Contains(d.Id)) continue;
+
+            var later = await _resolution.GetLaterPriceAsync(d.Symbol, d.Timestamp, ct);
+            if (later is null) continue;   // kein Kurs → später erneut versuchen
+
+            _repo.Insert(new CounterfactualRecord
+            {
+                DecisionId = d.Id,
+                SignalId = d.SignalId,
+                Module = d.Module,
+                Symbol = d.Symbol,
+                Reason = d.Reason.ToString(),
+                Side = d.Side,
+                SignalPrice = d.SignalPrice,
+                LaterPrice = later.Value,
+                HypotheticalPnlPerShare = later.Value - d.SignalPrice
+            });
+            written++;
+        }
+
+        if (written > 0) _logger.Info("Supervisor", $"Counterfactual: {written} abgelehnte BUY-Signale ausgewertet.");
+        return written;
+    }
+}

src/IBKRTrader.Modules.Supervisor/Counterfactual/CounterfactualRecord.cs

@@ -0,0 +1,24 @@
+namespace IBKRTrader.Modules.Supervisor.Counterfactual;
+
+/// <summary>
+/// Auswertung eines ABGELEHNTEN BUY-Signals (Tabelle sup_counterfactuals): „Was wäre gewesen?". Für
+/// Aktien = der spätere Kurs des abgelehnten Symbols vs. dem Signalpreis → hypothetischer GuV je Stück.
+/// Zeigt, ob ein Risk-Limit einen Gewinn oder einen Verlust verhindert hat. Ein Ergebnis je Entscheidung.
+/// </summary>
+public class CounterfactualRecord
+{
+    public long     Id         { get; set; }
+    public long     DecisionId { get; set; }   // Bezug auf core_decision_journal.Id (unique)
+    public DateTime CheckedAt  { get; set; } = DateTime.UtcNow;
+
+    public string   SignalId    { get; set; } = "";
+    public string   Module      { get; set; } = "";
+    public string   Symbol      { get; set; } = "";
+    public string   Reason      { get; set; } = "";   // ReasonCode der Ablehnung
+    public string   Side        { get; set; } = "";
+
+    public decimal  SignalPrice { get; set; }
+    public decimal  LaterPrice  { get; set; }
+    /// <summary>LaterPrice − SignalPrice (positiv = die Ablehnung hat Gewinn verhindert).</summary>
+    public decimal  HypotheticalPnlPerShare { get; set; }
+}

src/IBKRTrader.Modules.Supervisor/IBKRTrader.Modules.Supervisor.csproj

@@ -0,0 +1,31 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0-windows</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <!-- Modul trägt eigene WinForms-UI (Modul-Fenster) bei. -->
+    <UseWindowsForms>true</UseWindowsForms>
+    <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="8.0.3" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.11">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\IBKRTrader.Core\IBKRTrader.Core.csproj" />
+  </ItemGroup>
+
+  <!-- Erlaubt dem Testprojekt, interne Service-Methoden zu testen. -->
+  <ItemGroup>
+    <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleToAttribute">
+      <_Parameter1>IBKRTrader.Tests</_Parameter1>
+    </AssemblyAttribute>
+  </ItemGroup>
+
+</Project>

src/IBKRTrader.Modules.Supervisor/Mcp/McpJsonRpc.cs

@@ -0,0 +1,144 @@
+using System.Text;
+using System.Text.Json;
+using IBKRTrader.Modules.Supervisor.Agent;
+
+namespace IBKRTrader.Modules.Supervisor.Mcp;
+
+/// <summary>
+/// MCP-Light: purer JSON-RPC-2.0-Handler für das Model Context Protocol über die read-only
+/// <see cref="SupervisorToolRegistry"/>. Externe KI-Clients (z. B. Claude Code) erhalten damit dieselben
+/// Analyse-Tools wie der In-App-Agent — KEIN Modell-Zugang, nur die Daten-Tür. Unterstützt: initialize,
+/// ping, tools/list, tools/call. Pur und seiteneffektfrei → unit-getestet.
+/// </summary>
+public static class McpJsonRpc
+{
+    public const string ProtocolVersion = "2025-03-26";
+    public const string ServerName = "ibkrtrader-supervisor";
+    public const string ServerVersion = "1.0";
+
+    /// <summary>
+    /// Verarbeitet eine JSON-RPC-Nachricht. Liefert die Antwort als JSON-String — oder null für
+    /// Notifications (kein id) und unparsbare Eingaben ohne id.
+    /// </summary>
+    public static string? Handle(string requestJson, SupervisorToolRegistry registry)
+    {
+        JsonDocument doc;
+        try { doc = JsonDocument.Parse(requestJson); }
+        catch (JsonException) { return Error(null, -32700, "Parse error"); }
+
+        using (doc)
+        {
+            var root = doc.RootElement;
+            JsonElement? id = root.TryGetProperty("id", out var idProp) ? idProp.Clone() : (JsonElement?)null;
+            string method = root.TryGetProperty("method", out var m) ? m.GetString() ?? "" : "";
+
+            if (id == null) return null;   // Notifications werden nicht beantwortet
+
+            try
+            {
+                return method switch
+                {
+                    "initialize" => Result(id.Value, w =>
+                    {
+                        w.WriteString("protocolVersion", ProtocolVersion);
+                        w.WriteStartObject("capabilities");
+                        w.WriteStartObject("tools");
+                        w.WriteEndObject();
+                        w.WriteEndObject();
+                        w.WriteStartObject("serverInfo");
+                        w.WriteString("name", ServerName);
+                        w.WriteString("version", ServerVersion);
+                        w.WriteEndObject();
+                    }),
+
+                    "ping" => Result(id.Value, _ => { }),
+
+                    "tools/list" => Result(id.Value, w =>
+                    {
+                        w.WriteStartArray("tools");
+                        foreach (var tool in registry.Tools)
+                        {
+                            w.WriteStartObject();
+                            w.WriteString("name", tool.Name);
+                            w.WriteString("description", tool.Description);
+                            w.WritePropertyName("inputSchema");
+                            using (var schema = JsonDocument.Parse(tool.ParametersJsonSchema))
+                                schema.RootElement.WriteTo(w);
+                            w.WriteEndObject();
+                        }
+                        w.WriteEndArray();
+                    }),
+
+                    "tools/call" => HandleToolCall(id.Value, root, registry),
+
+                    _ => Error(id, -32601, $"Method not found: {method}")
+                };
+            }
+            catch (Exception ex)
+            {
+                return Error(id, -32603, $"Internal error: {ex.Message}");
+            }
+        }
+    }
+
+    private static string HandleToolCall(JsonElement id, JsonElement root, SupervisorToolRegistry registry)
+    {
+        if (!root.TryGetProperty("params", out var p) || p.ValueKind != JsonValueKind.Object)
+            return Error(id, -32602, "Invalid params");
+
+        string name = p.TryGetProperty("name", out var n) ? n.GetString() ?? "" : "";
+        string argsJson = p.TryGetProperty("arguments", out var a) && a.ValueKind == JsonValueKind.Object
+            ? a.GetRawText() : "{}";
+
+        string toolResult = registry.Execute(name, argsJson);
+        bool isError = toolResult.StartsWith("FEHLER", StringComparison.OrdinalIgnoreCase);
+
+        return Result(id, w =>
+        {
+            w.WriteStartArray("content");
+            w.WriteStartObject();
+            w.WriteString("type", "text");
+            w.WriteString("text", toolResult);
+            w.WriteEndObject();
+            w.WriteEndArray();
+            w.WriteBoolean("isError", isError);
+        });
+    }
+
+    // ----- JSON-RPC-Hüllen -----
+
+    private static string Result(JsonElement id, Action<Utf8JsonWriter> writeResult)
+    {
+        using var ms = new MemoryStream();
+        using (var w = new Utf8JsonWriter(ms))
+        {
+            w.WriteStartObject();
+            w.WriteString("jsonrpc", "2.0");
+            w.WritePropertyName("id");
+            id.WriteTo(w);
+            w.WriteStartObject("result");
+            writeResult(w);
+            w.WriteEndObject();
+            w.WriteEndObject();
+        }
+        return Encoding.UTF8.GetString(ms.ToArray());
+    }
+
+    private static string Error(JsonElement? id, int code, string message)
+    {
+        using var ms = new MemoryStream();
+        using (var w = new Utf8JsonWriter(ms))
+        {
+            w.WriteStartObject();
+            w.WriteString("jsonrpc", "2.0");
+            w.WritePropertyName("id");
+            if (id.HasValue) id.Value.WriteTo(w); else w.WriteNullValue();
+            w.WriteStartObject("error");
+            w.WriteNumber("code", code);
+            w.WriteString("message", message);
+            w.WriteEndObject();
+            w.WriteEndObject();
+        }
+        return Encoding.UTF8.GetString(ms.ToArray());
+    }
+}

src/IBKRTrader.Modules.Supervisor/Mcp/McpLightServer.cs

@@ -0,0 +1,103 @@
+using System.Net;
+using System.Text;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Modules.Supervisor.Agent;
+using Microsoft.Extensions.Hosting;
+
+namespace IBKRTrader.Modules.Supervisor.Mcp;
+
+/// <summary>
+/// MCP-Light-Host: lokaler HTTP-Endpoint (nur POST-JSON), der die read-only Tool-Registry per Model
+/// Context Protocol exponiert. Externe Clients wie Claude Code verbinden sich mit
+/// <c>claude mcp add --transport http ibkrtrader http://127.0.0.1:PORT/mcp</c>.
+///
+/// SICHERHEIT: bewusst OPT-IN (startet nur, wenn IBKRTRADER_MCP_PORT gesetzt ist) und bindet
+/// ausschließlich an 127.0.0.1 (kein Netzwerkzugriff). Die Tools sind read-only – es existiert kein
+/// Mechanismus zum Handeln/Schreiben. Kein Modell-Zugang: MCP ist nur die Daten-Tür.
+/// </summary>
+public sealed class McpLightServer : BackgroundService
+{
+    private readonly SupervisorToolRegistry _registry;
+    private readonly LoggingService         _logger;
+
+    public McpLightServer(SupervisorToolRegistry registry, LoggingService logger)
+    {
+        _registry = registry;
+        _logger = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        string? portRaw = Environment.GetEnvironmentVariable("IBKRTRADER_MCP_PORT");
+        if (string.IsNullOrWhiteSpace(portRaw))
+        {
+            _logger.Info("Supervisor", "MCP-Light: deaktiviert (IBKRTRADER_MCP_PORT nicht gesetzt).");
+            return;
+        }
+        if (!int.TryParse(portRaw, out int port) || port is < 1024 or > 65535)
+        {
+            _logger.Warn("Supervisor", $"MCP-Light: ungültiger Port '{portRaw}' – Server startet nicht.");
+            return;
+        }
+
+        using var listener = new HttpListener();
+        listener.Prefixes.Add($"http://127.0.0.1:{port}/mcp/");
+        try { listener.Start(); }
+        catch (Exception ex)
+        {
+            _logger.Error("Supervisor", $"MCP-Light: Start auf Port {port} fehlgeschlagen: {ex.Message}", ex);
+            return;
+        }
+
+        _logger.Info("Supervisor", $"🔌 MCP-Light aktiv: http://127.0.0.1:{port}/mcp (read-only, {_registry.Tools.Count} Tools). " +
+            $"Claude Code: claude mcp add --transport http ibkrtrader http://127.0.0.1:{port}/mcp");
+
+        using var reg = stoppingToken.Register(() => { try { listener.Stop(); } catch { } });
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            HttpListenerContext ctx;
+            try { ctx = await listener.GetContextAsync(); }
+            catch when (stoppingToken.IsCancellationRequested) { break; }
+            catch (Exception ex) { _logger.Warn("Supervisor", $"MCP-Light: Listener-Fehler: {ex.Message}"); continue; }
+
+            _ = Task.Run(() => HandleRequestAsync(ctx), stoppingToken);
+        }
+    }
+
+    private async Task HandleRequestAsync(HttpListenerContext ctx)
+    {
+        try
+        {
+            if (ctx.Request.HttpMethod != "POST")
+            {
+                ctx.Response.StatusCode = 405;
+                ctx.Response.Close();
+                return;
+            }
+
+            string body;
+            using (var reader = new StreamReader(ctx.Request.InputStream, ctx.Request.ContentEncoding))
+                body = await reader.ReadToEndAsync();
+
+            string? response = McpJsonRpc.Handle(body, _registry);
+            if (response == null)
+            {
+                ctx.Response.StatusCode = 202;   // Notification: angenommen, keine Antwort
+                ctx.Response.Close();
+                return;
+            }
+
+            byte[] bytes = Encoding.UTF8.GetBytes(response);
+            ctx.Response.StatusCode = 200;
+            ctx.Response.ContentType = "application/json";
+            ctx.Response.ContentLength64 = bytes.Length;
+            await ctx.Response.OutputStream.WriteAsync(bytes);
+            ctx.Response.Close();
+        }
+        catch (Exception ex)
+        {
+            _logger.Warn("Supervisor", $"MCP-Light: Request-Fehler: {ex.Message}");
+            try { ctx.Response.StatusCode = 500; ctx.Response.Close(); } catch { }
+        }
+    }
+}

src/IBKRTrader.Modules.Supervisor/Migrations/20260730170542_InitialSupervisor.Designer.cs

@@ -0,0 +1,143 @@
+// <auto-generated />
+using System;
+using IBKRTrader.Modules.Supervisor.Persistence;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace IBKRTrader.Modules.Supervisor.Migrations
+{
+    [DbContext(typeof(SupervisorDbContext))]
+    [Migration("20260730170542_InitialSupervisor")]
+    partial class InitialSupervisor
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.13")
+                .HasAnnotation("Relational:MaxIdentifierLength", 64);
+
+            MySqlModelBuilderExtensions.AutoIncrementColumns(modelBuilder);
+
+            modelBuilder.Entity("IBKRTrader.Modules.Supervisor.Counterfactual.CounterfactualRecord", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CheckedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<long>("DecisionId")
+                        .HasColumnType("bigint");
+
+                    b.Property<decimal>("HypotheticalPnlPerShare")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<decimal>("LaterPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<string>("Module")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("Reason")
+                        .IsRequired()
+                        .HasMaxLength(40)
+                        .HasColumnType("varchar(40)");
+
+                    b.Property<string>("Side")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("SignalId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)");
+
+                    b.Property<decimal>("SignalPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<string>("Symbol")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CheckedAt");
+
+                    b.HasIndex("DecisionId")
+                        .IsUnique();
+
+                    b.HasIndex("Reason");
+
+                    b.ToTable("sup_counterfactuals", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Modules.Supervisor.Persistence.SupervisorReport", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("Answer")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("CompletionTokens")
+                        .HasColumnType("int");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("Model")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("varchar(120)");
+
+                    b.Property<string>("Profile")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<int>("PromptTokens")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Question")
+                        .IsRequired()
+                        .HasMaxLength(4000)
+                        .HasColumnType("varchar(4000)");
+
+                    b.Property<int>("ToolCallCount")
+                        .HasColumnType("int");
+
+                    b.Property<string>("ToolCallsJson")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CreatedAt");
+
+                    b.ToTable("sup_reports", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

src/IBKRTrader.Modules.Supervisor/Migrations/20260730170542_InitialSupervisor.cs

@@ -0,0 +1,105 @@
+using System;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace IBKRTrader.Modules.Supervisor.Migrations
+{
+    /// <inheritdoc />
+    public partial class InitialSupervisor : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterDatabase()
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "sup_counterfactuals",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    DecisionId = table.Column<long>(type: "bigint", nullable: false),
+                    CheckedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    SignalId = table.Column<string>(type: "varchar(64)", maxLength: 64, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Module = table.Column<string>(type: "varchar(50)", maxLength: 50, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Symbol = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Reason = table.Column<string>(type: "varchar(40)", maxLength: 40, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Side = table.Column<string>(type: "varchar(10)", maxLength: 10, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    SignalPrice = table.Column<decimal>(type: "decimal(18,4)", precision: 18, scale: 4, nullable: false),
+                    LaterPrice = table.Column<decimal>(type: "decimal(18,4)", precision: 18, scale: 4, nullable: false),
+                    HypotheticalPnlPerShare = table.Column<decimal>(type: "decimal(18,4)", precision: 18, scale: 4, nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_sup_counterfactuals", x => x.Id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "sup_reports",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    CreatedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    Profile = table.Column<string>(type: "varchar(50)", maxLength: 50, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Model = table.Column<string>(type: "varchar(120)", maxLength: 120, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Question = table.Column<string>(type: "varchar(4000)", maxLength: 4000, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Answer = table.Column<string>(type: "text", nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    ToolCallsJson = table.Column<string>(type: "text", nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    ToolCallCount = table.Column<int>(type: "int", nullable: false),
+                    PromptTokens = table.Column<int>(type: "int", nullable: false),
+                    CompletionTokens = table.Column<int>(type: "int", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_sup_reports", x => x.Id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sup_counterfactuals_CheckedAt",
+                table: "sup_counterfactuals",
+                column: "CheckedAt");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sup_counterfactuals_DecisionId",
+                table: "sup_counterfactuals",
+                column: "DecisionId",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sup_counterfactuals_Reason",
+                table: "sup_counterfactuals",
+                column: "Reason");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_sup_reports_CreatedAt",
+                table: "sup_reports",
+                column: "CreatedAt");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "sup_counterfactuals");
+
+            migrationBuilder.DropTable(
+                name: "sup_reports");
+        }
+    }
+}

src/IBKRTrader.Modules.Supervisor/Migrations/SupervisorDbContextModelSnapshot.cs

@@ -0,0 +1,140 @@
+// <auto-generated />
+using System;
+using IBKRTrader.Modules.Supervisor.Persistence;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace IBKRTrader.Modules.Supervisor.Migrations
+{
+    [DbContext(typeof(SupervisorDbContext))]
+    partial class SupervisorDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.13")
+                .HasAnnotation("Relational:MaxIdentifierLength", 64);
+
+            MySqlModelBuilderExtensions.AutoIncrementColumns(modelBuilder);
+
+            modelBuilder.Entity("IBKRTrader.Modules.Supervisor.Counterfactual.CounterfactualRecord", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CheckedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<long>("DecisionId")
+                        .HasColumnType("bigint");
+
+                    b.Property<decimal>("HypotheticalPnlPerShare")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<decimal>("LaterPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<string>("Module")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("Reason")
+                        .IsRequired()
+                        .HasMaxLength(40)
+                        .HasColumnType("varchar(40)");
+
+                    b.Property<string>("Side")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<string>("SignalId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)");
+
+                    b.Property<decimal>("SignalPrice")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<string>("Symbol")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CheckedAt");
+
+                    b.HasIndex("DecisionId")
+                        .IsUnique();
+
+                    b.HasIndex("Reason");
+
+                    b.ToTable("sup_counterfactuals", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Modules.Supervisor.Persistence.SupervisorReport", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("Answer")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("CompletionTokens")
+                        .HasColumnType("int");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("Model")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("varchar(120)");
+
+                    b.Property<string>("Profile")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<int>("PromptTokens")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Question")
+                        .IsRequired()
+                        .HasMaxLength(4000)
+                        .HasColumnType("varchar(4000)");
+
+                    b.Property<int>("ToolCallCount")
+                        .HasColumnType("int");
+
+                    b.Property<string>("ToolCallsJson")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CreatedAt");
+
+                    b.ToTable("sup_reports", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

src/IBKRTrader.Modules.Supervisor/Persistence/SupervisorDbContext.cs

@@ -0,0 +1,155 @@
+using IBKRTrader.Core.Configuration;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Modules.Supervisor.Counterfactual;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+
+namespace IBKRTrader.Modules.Supervisor.Persistence;
+
+/// <summary>EF-Kontext des Supervisor-Moduls (gleiche MariaDB, Tabellen mit Präfix sup_).</summary>
+public class SupervisorDbContext : DbContext
+{
+    public SupervisorDbContext(DbContextOptions<SupervisorDbContext> options) : base(options) { }
+
+    public DbSet<SupervisorReport>     Reports        => Set<SupervisorReport>();
+    public DbSet<CounterfactualRecord> Counterfactuals => Set<CounterfactualRecord>();
+
+    protected override void OnModelCreating(ModelBuilder b)
+    {
+        b.Entity<SupervisorReport>(e =>
+        {
+            e.ToTable("sup_reports");
+            e.HasKey(x => x.Id);
+            e.Property(x => x.Id).ValueGeneratedOnAdd();
+            e.Property(x => x.Profile).HasMaxLength(50);
+            e.Property(x => x.Model).HasMaxLength(120);
+            e.Property(x => x.Question).HasMaxLength(4000);
+            e.Property(x => x.Answer).HasColumnType("text");
+            e.Property(x => x.ToolCallsJson).HasColumnType("text");
+            e.HasIndex(x => x.CreatedAt);
+        });
+
+        b.Entity<CounterfactualRecord>(e =>
+        {
+            e.ToTable("sup_counterfactuals");
+            e.HasKey(x => x.Id);
+            e.Property(x => x.Id).ValueGeneratedOnAdd();
+            e.Property(x => x.SignalId).HasMaxLength(64);
+            e.Property(x => x.Module).HasMaxLength(50);
+            e.Property(x => x.Symbol).HasMaxLength(20);
+            e.Property(x => x.Reason).HasMaxLength(40);
+            e.Property(x => x.Side).HasMaxLength(10);
+            e.Property(x => x.SignalPrice).HasPrecision(18, 4);
+            e.Property(x => x.LaterPrice).HasPrecision(18, 4);
+            e.Property(x => x.HypotheticalPnlPerShare).HasPrecision(18, 4);
+            e.HasIndex(x => x.DecisionId).IsUnique();   // ein Ergebnis je Entscheidung
+            e.HasIndex(x => x.CheckedAt);
+            e.HasIndex(x => x.Reason);
+        });
+    }
+}
+
+/// <summary>Design-Time-Factory für EF-Tooling (dotnet ef). Connection aus env IBKRTRADER_MYSQL.</summary>
+public class SupervisorDbContextFactory : IDesignTimeDbContextFactory<SupervisorDbContext>
+{
+    public SupervisorDbContext CreateDbContext(string[] args)
+    {
+        var conn = Environment.GetEnvironmentVariable("IBKRTRADER_MYSQL")
+            ?? "Server=localhost;Port=3306;Database=ibkrtrader;User ID=root;Password=;";
+
+        var options = new DbContextOptionsBuilder<SupervisorDbContext>()
+            .UseMySql(conn, DatabaseServerVersion.Value)
+            .Options;
+
+        return new SupervisorDbContext(options);
+    }
+}
+
+/// <summary>Bericht-Ablage. Write fehlertolerant (Analyse darf nie an der Persistenz scheitern).</summary>
+public interface ISupervisorReportRepository
+{
+    void Insert(SupervisorReport report);
+    List<SupervisorReport> GetRecent(int limit);
+}
+
+/// <summary>Counterfactual-Ablage. Write fehlertolerant.</summary>
+public interface ISupervisorCounterfactualRepository
+{
+    HashSet<long> ExistingDecisionIds(IEnumerable<long> decisionIds);
+    void Insert(CounterfactualRecord record);
+    List<CounterfactualRecord> GetRecent(int limit);
+}
+
+public sealed class EfSupervisorReportRepository : ISupervisorReportRepository
+{
+    private readonly IDbContextFactory<SupervisorDbContext> _dbf;
+    private readonly LoggingService                         _logger;
+
+    public EfSupervisorReportRepository(IDbContextFactory<SupervisorDbContext> dbf, LoggingService logger)
+    {
+        _dbf = dbf;
+        _logger = logger;
+    }
+
+    public void Insert(SupervisorReport report)
+    {
+        try
+        {
+            using var db = _dbf.CreateDbContext();
+            db.Reports.Add(report);
+            db.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _logger.Warn("Supervisor", $"Report-Write fehlgeschlagen (ignoriert): {ex.Message}");
+        }
+    }
+
+    public List<SupervisorReport> GetRecent(int limit)
+    {
+        using var db = _dbf.CreateDbContext();
+        return db.Reports.AsNoTracking().OrderByDescending(r => r.CreatedAt).Take(limit).ToList();
+    }
+}
+
+public sealed class EfSupervisorCounterfactualRepository : ISupervisorCounterfactualRepository
+{
+    private readonly IDbContextFactory<SupervisorDbContext> _dbf;
+    private readonly LoggingService                         _logger;
+
+    public EfSupervisorCounterfactualRepository(IDbContextFactory<SupervisorDbContext> dbf, LoggingService logger)
+    {
+        _dbf = dbf;
+        _logger = logger;
+    }
+
+    public HashSet<long> ExistingDecisionIds(IEnumerable<long> decisionIds)
+    {
+        var ids = decisionIds.ToList();
+        using var db = _dbf.CreateDbContext();
+        return db.Counterfactuals.AsNoTracking()
+            .Where(c => ids.Contains(c.DecisionId))
+            .Select(c => c.DecisionId)
+            .ToHashSet();
+    }
+
+    public void Insert(CounterfactualRecord record)
+    {
+        try
+        {
+            using var db = _dbf.CreateDbContext();
+            db.Counterfactuals.Add(record);
+            db.SaveChanges();
+        }
+        catch (Exception ex)
+        {
+            _logger.Warn("Supervisor", $"Counterfactual-Write fehlgeschlagen (ignoriert): {ex.Message}");
+        }
+    }
+
+    public List<CounterfactualRecord> GetRecent(int limit)
+    {
+        using var db = _dbf.CreateDbContext();
+        return db.Counterfactuals.AsNoTracking().OrderByDescending(c => c.CheckedAt).Take(limit).ToList();
+    }
+}

src/IBKRTrader.Modules.Supervisor/Persistence/SupervisorReport.cs

@@ -0,0 +1,23 @@
+namespace IBKRTrader.Modules.Supervisor.Persistence;
+
+/// <summary>
+/// Gespeicherte Analyse (Tabelle sup_reports): Frage, Antwort, Profil/Modell und die Tool-Aufruf-Historie
+/// – macht den Supervisor selbst auditierbar und füttert später Tagesberichte.
+/// </summary>
+public class SupervisorReport
+{
+    public long     Id        { get; set; }
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    public string Profile  { get; set; } = "";
+    public string Model    { get; set; } = "";
+    public string Question { get; set; } = "";
+    public string Answer   { get; set; } = "";
+
+    /// <summary>Tool-Aufrufe als JSON [{tool,args}] (Ergebnisse sind reproduzierbar, daher nicht gespeichert).</summary>
+    public string ToolCallsJson { get; set; } = "";
+
+    public int ToolCallCount    { get; set; }
+    public int PromptTokens      { get; set; }
+    public int CompletionTokens  { get; set; }
+}

src/IBKRTrader.Modules.Supervisor/Services/DailyReportService.cs

@@ -0,0 +1,76 @@
+using System.Text.Json;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Modules.Supervisor.Agent;
+using IBKRTrader.Modules.Supervisor.Persistence;
+using Microsoft.Extensions.Hosting;
+
+namespace IBKRTrader.Modules.Supervisor.Services;
+
+/// <summary>
+/// Täglicher Supervisor-Bericht (OPT-IN via env IBKRTRADER_SUPERVISOR_DAILY = Stunde 0–23). Lässt den
+/// Agenten einmal je Tag eine Standard-Analyse fahren und legt sie in sup_reports ab. Ohne gesetzte
+/// Variable oder ohne OpenRouter-Key passiert nichts (deaktiviert bzw. sauber übersprungen). Kein
+/// externer Versand (Threema o. ä.) in dieser Ausbaustufe.
+/// </summary>
+public sealed class DailyReportService : BackgroundService
+{
+    private const string StandardQuestion =
+        "Fasse die letzten 24 Stunden zusammen: auffällige Ablehnungen/Fehler, ausgeführte Trades und " +
+        "eine kurze Einschätzung der technischen Gesundheit. Nutze die Tools.";
+
+    private readonly SupervisorAgent            _agent;
+    private readonly ISupervisorReportRepository _reports;
+    private readonly LoggingService             _logger;
+
+    public DailyReportService(SupervisorAgent agent, ISupervisorReportRepository reports, LoggingService logger)
+    {
+        _agent   = agent;
+        _reports = reports;
+        _logger  = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        string? raw = Environment.GetEnvironmentVariable("IBKRTRADER_SUPERVISOR_DAILY");
+        if (!int.TryParse(raw, out int hour) || hour is < 0 or > 23)
+        {
+            _logger.Info("Supervisor", "Tagesbericht deaktiviert (IBKRTRADER_SUPERVISOR_DAILY nicht gesetzt).");
+            return;
+        }
+
+        _logger.Info("Supervisor", $"Tagesbericht aktiv: täglich um {hour:00}:00 Uhr.");
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            var delay = NextRun(DateTime.Now, hour) - DateTime.Now;
+            try { await Task.Delay(delay, stoppingToken); }
+            catch (OperationCanceledException) { break; }
+
+            try { await RunOnceAsync(stoppingToken); }
+            catch (OperationCanceledException) { break; }
+            catch (Exception ex) { _logger.Warn("Supervisor", $"Tagesbericht fehlgeschlagen: {ex.Message}"); }
+        }
+    }
+
+    internal static DateTime NextRun(DateTime now, int hour)
+    {
+        var candidate = new DateTime(now.Year, now.Month, now.Day, hour, 0, 0, DateTimeKind.Local);
+        return candidate <= now ? candidate.AddDays(1) : candidate;
+    }
+
+    private async Task RunOnceAsync(CancellationToken ct)
+    {
+        var result = await _agent.AskAsync(StandardQuestion, profile: SupervisorProfiles.Technik, ct: ct);
+        _reports.Insert(new SupervisorReport
+        {
+            Profile = SupervisorProfiles.Technik.Name,
+            Model = SupervisorAgent.DefaultModel,
+            Question = StandardQuestion,
+            Answer = result.Answer,
+            ToolCallsJson = JsonSerializer.Serialize(result.ToolInvocations.Select(i => new { i.Tool, i.Arguments })),
+            ToolCallCount = result.ToolInvocations.Count,
+            PromptTokens = result.PromptTokens,
+            CompletionTokens = result.CompletionTokens
+        });
+        _logger.Info("Supervisor", "Täglicher Supervisor-Bericht erstellt.");
+    }
+}

src/IBKRTrader.Modules.Supervisor/Services/DossierService.cs

@@ -0,0 +1,89 @@
+using IBKRTrader.Core.Analytics;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence;
+
+namespace IBKRTrader.Modules.Supervisor.Services;
+
+/// <summary>Kopfzeile eines Signals für die Übersichtsliste des Dossier-Browsers.</summary>
+public sealed record SignalSummary(
+    string SignalId, DateTime FirstSeen, string Module, string Symbol,
+    string Side, string LastDecision, string LastReason, int DecisionCount);
+
+/// <summary>
+/// Beschafft die Daten für Trade-Dossiers: Entscheidungsjournal + Order-Events + Trade-Log +
+/// JSONL-Log-Zeilen (per CorrelationId), Zusammenbau/Rendering pur im <see cref="DossierBuilder"/>
+/// (Core). Read-only — der Supervisor ist Beobachter.
+/// </summary>
+public sealed class DossierService
+{
+    private readonly IDecisionJournal _journal;
+    private readonly IOrderEventLog   _orderEvents;
+    private readonly TradeLogReader   _trades;
+    private readonly string           _logsDirectory;
+
+    public DossierService(IDecisionJournal journal, IOrderEventLog orderEvents, TradeLogReader trades)
+    {
+        _journal       = journal;
+        _orderEvents   = orderEvents;
+        _trades        = trades;
+        _logsDirectory = Path.Combine(AppContext.BaseDirectory, "Logs");
+    }
+
+    /// <summary>Jüngste Signale (gruppiert über das Entscheidungsjournal), neueste zuerst.</summary>
+    public List<SignalSummary> RecentSignals(int limit = 200)
+    {
+        var decisions = _journal.Query(d => d.SignalId != "", limit * 5);
+        return decisions
+            .GroupBy(d => d.SignalId)
+            .Select(g =>
+            {
+                var ordered = g.OrderBy(d => d.Timestamp).ToList();
+                var first = ordered[0];
+                var last = ordered[^1];
+                return new SignalSummary(g.Key, first.Timestamp, first.Module, first.Symbol,
+                    first.Side, last.Decision.ToString(), last.Reason.ToString(), ordered.Count);
+            })
+            .OrderByDescending(s => s.FirstSeen)
+            .Take(limit)
+            .ToList();
+    }
+
+    /// <summary>Baut das komplette Dossier zu einer SignalId (inkl. Log-Zeilen aus den JSONL-Tagesdateien).</summary>
+    public TradeDossier BuildForSignal(string signalId)
+    {
+        var decisions = _journal.Query(d => d.SignalId == signalId);
+        var events = _orderEvents.Query(e => e.SignalId == signalId);
+        var trades = _trades.BySignal(signalId);
+        var logLines = ReadLogLines(signalId, decisions.Select(d => d.Timestamp).Concat(events.Select(e => e.Timestamp)));
+        return DossierBuilder.Build(signalId, decisions, events, trades, logLines);
+    }
+
+    /// <summary>
+    /// Liest JSONL-Zeilen mit passender CorrelationId — nur aus den Tagesdateien im Zeitfenster der
+    /// bekannten Ereignisse (±1 Tag), statt alle Logs zu scannen. Fehlertolerant (fehlende Dateien = leer).
+    /// </summary>
+    private List<LogJson.ParsedLogLine> ReadLogLines(string signalId, IEnumerable<DateTime> eventTimes)
+    {
+        var result = new List<LogJson.ParsedLogLine>();
+        var times = eventTimes.ToList();
+        if (times.Count == 0 || string.IsNullOrEmpty(signalId)) return result;
+
+        try
+        {
+            var from = times.Min().Date.AddDays(-1);
+            var to = times.Max().Date.AddDays(1);
+            for (var day = from; day <= to; day = day.AddDays(1))
+            {
+                string path = Path.Combine(_logsDirectory, $"{day:yyyy-MM-dd}.jsonl");
+                if (!File.Exists(path)) continue;
+                foreach (var line in File.ReadLines(path))
+                {
+                    var p = LogJson.ParseLine(line);
+                    if (p != null && p.Cid == signalId) result.Add(p);
+                }
+            }
+        }
+        catch { /* Log-Auszug ist Beiwerk – Dossier bleibt auch ohne nutzbar */ }
+        return result;
+    }
+}

src/IBKRTrader.Modules.Supervisor/Services/TradeLogReader.cs

@@ -0,0 +1,42 @@
+using IBKRTrader.Core.Persistence.Ef;
+using IBKRTrader.Core.Persistence.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace IBKRTrader.Modules.Supervisor.Services;
+
+/// <summary>
+/// Read-only-Zugriff auf die modulübergreifende Trade-Historie (core_trade_history). Kapselt die
+/// CoreDbContext-Queries für die Supervisor-Tools und den Dossier-Aufbau. Rein lesend.
+/// </summary>
+public sealed class TradeLogReader
+{
+    private readonly IDbContextFactory<CoreDbContext> _dbf;
+    public TradeLogReader(IDbContextFactory<CoreDbContext> dbf) => _dbf = dbf;
+
+    public List<CoreTrade> Query(string? module, string? symbol, DateTime since, int limit)
+    {
+        using var db = _dbf.CreateDbContext();
+        var q = db.TradeHistory.AsNoTracking().Where(t => t.TradedAt >= since);
+        if (!string.IsNullOrEmpty(module)) q = q.Where(t => t.Module == module);
+        if (!string.IsNullOrEmpty(symbol)) q = q.Where(t => t.Symbol == symbol);
+        return q.OrderByDescending(t => t.TradedAt).Take(limit).ToList();
+    }
+
+    /// <summary>Alle Fills eines Moduls/Zeitraums (für die realisierte KPI-Berechnung, chronologisch).</summary>
+    public List<CoreTrade> ForKpis(string? module, DateTime since)
+    {
+        using var db = _dbf.CreateDbContext();
+        var q = db.TradeHistory.AsNoTracking().Where(t => t.TradedAt >= since);
+        if (!string.IsNullOrEmpty(module)) q = q.Where(t => t.Module == module);
+        return q.OrderBy(t => t.TradedAt).ToList();
+    }
+
+    public List<CoreTrade> BySignal(string signalId)
+    {
+        using var db = _dbf.CreateDbContext();
+        return db.TradeHistory.AsNoTracking()
+            .Where(t => t.SignalId == signalId)
+            .OrderBy(t => t.TradedAt)
+            .ToList();
+    }
+}

src/IBKRTrader.Modules.Supervisor/SupervisorModule.cs

@@ -0,0 +1,79 @@
+using System.Net.Http;
+using IBKRTrader.Core.Configuration;
+using IBKRTrader.Core.DependencyInjection;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Modularity;
+using IBKRTrader.Core.Persistence;
+using IBKRTrader.Modules.Supervisor.Agent;
+using IBKRTrader.Modules.Supervisor.Counterfactual;
+using IBKRTrader.Modules.Supervisor.Persistence;
+using IBKRTrader.Modules.Supervisor.Services;
+using IBKRTrader.Modules.Supervisor.Ui;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace IBKRTrader.Modules.Supervisor;
+
+/// <summary>
+/// Supervisor-Modul: KI-gestützte Analyse/Forensik über ALLE Module — strikt read-only (kein Handel).
+/// Dossier-Browser über Entscheidungsjournal/Order-Events/Trade-Log/JSONL-Logs, OpenRouter-Agent mit
+/// read-only Tool-Registry, optional Counterfactual-Auswertung, Tagesbericht und MCP-Light. Konzept:
+/// docs/konzepte/KONZEPT-Modul-Supervisor.md.
+/// </summary>
+public sealed class SupervisorModule : IModule
+{
+    public string Name     => "Supervisor";
+    public string DbPrefix => "sup_";
+
+    public void RegisterServices(IServiceCollection services, IConfiguration configuration)
+    {
+        // sup_-Persistenz (gespeicherte Analysen/Berichte + Counterfactuals).
+        var conn = ServiceCollectionExtensions.EffectiveConnectionString(configuration["Database:MySqlConnectionString"]);
+        services.AddDbContextFactory<SupervisorDbContext>(o => o.UseMySql(conn, DatabaseServerVersion.Value));
+        services.AddSingleton<ISupervisorReportRepository, EfSupervisorReportRepository>();
+        services.AddSingleton<ISupervisorCounterfactualRepository, EfSupervisorCounterfactualRepository>();
+
+        // Dossier-Beschaffung + Trade-Log-Reader (read-only auf Core-Daten).
+        services.AddSingleton<TradeLogReader>();
+        services.AddSingleton<DossierService>();
+
+        // read-only Tool-Registry + OpenRouter-Agent (Key getrennt vom Trading, siehe Konzept §5).
+        services.AddSingleton(sp => SupervisorTools.CreateRegistry(
+            sp.GetRequiredService<IDecisionJournal>(),
+            sp.GetRequiredService<IOrderEventLog>(),
+            sp.GetRequiredService<TradeLogReader>(),
+            sp.GetRequiredService<DossierService>(),
+            sp.GetRequiredService<ISupervisorCounterfactualRepository>()));
+        services.AddSingleton<IChatCompletionClient>(_ =>
+            new OpenRouterClient(new HttpClient { Timeout = TimeSpan.FromMinutes(3) }));
+        services.AddSingleton<SupervisorAgent>();
+
+        // Counterfactual-Auswertung (abgelehnte BUYs vs. späterer Kurs) – Live-Quelle als Null-Stub.
+        services.AddSingleton<ICounterfactualResolutionSource, NullCounterfactualResolutionSource>();
+        services.AddHostedService<CounterfactualJob>();
+
+        // Tagesbericht (opt-in via IBKRTRADER_SUPERVISOR_DAILY) + MCP-Light (opt-in via IBKRTRADER_MCP_PORT).
+        services.AddHostedService<DailyReportService>();
+        services.AddHostedService<Mcp.McpLightServer>();
+    }
+
+    public void RegisterUi(IModuleUiHost host, IServiceProvider services)
+    {
+        host.RegisterView(new ModuleView
+        {
+            Id    = "supervisor.main",
+            Title = "Supervisor",
+            Group = Name,
+            Order = 300,
+            CreateForm = () => new SupervisorMainForm(
+                services.GetRequiredService<SupervisorAgent>(),
+                services.GetRequiredService<DossierService>(),
+                services.GetRequiredService<ISupervisorReportRepository>(),
+                services.GetRequiredService<LoggingService>())
+        });
+    }
+
+    public Task StartAsync(CancellationToken cancellationToken) => Task.CompletedTask;
+    public Task StopAsync(CancellationToken cancellationToken)  => Task.CompletedTask;
+}

src/IBKRTrader.Modules.Supervisor/Ui/SupervisorMainForm.cs

@@ -0,0 +1,188 @@
+using System.Text;
+using System.Text.Json;
+using IBKRTrader.Core.Analytics;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Modules.Supervisor.Agent;
+using IBKRTrader.Modules.Supervisor.Persistence;
+using IBKRTrader.Modules.Supervisor.Services;
+
+namespace IBKRTrader.Modules.Supervisor.Ui;
+
+/// <summary>
+/// Fenster des Supervisor-Moduls: Analyse (Chat mit dem Agenten, Tool-Aufrufe sichtbar), Dossier-Browser,
+/// Berichte, Settings. Read-only. DB-/Agent-Zugriffe laufen NUR auf Nutzer-Interaktion (Smoke-UI-sicher).
+/// </summary>
+public sealed class SupervisorMainForm : Form
+{
+    private readonly SupervisorAgent             _agent;
+    private readonly DossierService              _dossiers;
+    private readonly ISupervisorReportRepository _reports;
+    private readonly LoggingService              _logger;
+
+    private readonly ComboBox      _profile  = new() { DropDownStyle = ComboBoxStyle.DropDownList, Width = 160 };
+    private readonly TextBox       _question = new() { Dock = DockStyle.Fill, Multiline = true, Height = 60 };
+    private readonly RichTextBox   _answer   = new() { Dock = DockStyle.Fill, ReadOnly = true, Font = new Font("Consolas", 9f) };
+    private readonly Button        _ask      = new() { Text = "Fragen", Width = 100 };
+
+    private readonly DataGridView  _signals  = new() { Dock = DockStyle.Left, Width = 360, ReadOnly = true, AllowUserToAddRows = false, RowHeadersVisible = false, AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill };
+    private readonly RichTextBox   _dossier  = new() { Dock = DockStyle.Fill, ReadOnly = true, Font = new Font("Consolas", 9f) };
+    private readonly DataGridView  _reportsGrid = new() { Dock = DockStyle.Fill, ReadOnly = true, AllowUserToAddRows = false, RowHeadersVisible = false, AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill };
+
+    public SupervisorMainForm(
+        SupervisorAgent agent, DossierService dossiers, ISupervisorReportRepository reports, LoggingService logger)
+    {
+        _agent    = agent;
+        _dossiers = dossiers;
+        _reports  = reports;
+        _logger   = logger;
+
+        Text          = "Supervisor";
+        Width         = 1080;
+        Height        = 720;
+        StartPosition = FormStartPosition.CenterScreen;
+        MinimumSize   = new Size(800, 520);
+
+        foreach (var p in SupervisorProfiles.All) _profile.Items.Add(p.Name);
+        _profile.SelectedIndex = 0;
+
+        BuildLayout();
+    }
+
+    private void BuildLayout()
+    {
+        var tabs = new TabControl { Dock = DockStyle.Fill };
+
+        // ── Tab: Analyse ──
+        var tabChat = new TabPage("Analyse");
+        var top = new FlowLayoutPanel { Dock = DockStyle.Top, Height = 36, Padding = new Padding(8, 6, 8, 0) };
+        top.Controls.Add(new Label { Text = "Profil", AutoSize = true, Margin = new Padding(0, 8, 4, 0) });
+        top.Controls.Add(_profile);
+        _ask.Click += async (_, _) => await AskAsync();
+        var qPanel = new Panel { Dock = DockStyle.Top, Height = 70, Padding = new Padding(8, 2, 8, 4) };
+        qPanel.Controls.Add(_question);
+        var askPanel = new Panel { Dock = DockStyle.Top, Height = 34, Padding = new Padding(8, 0, 8, 0) };
+        askPanel.Controls.Add(_ask);
+        var answerPanel = new Panel { Dock = DockStyle.Fill, Padding = new Padding(8) };
+        answerPanel.Controls.Add(_answer);
+        tabChat.Controls.Add(answerPanel);
+        tabChat.Controls.Add(askPanel);
+        tabChat.Controls.Add(qPanel);
+        tabChat.Controls.Add(top);
+
+        // ── Tab: Dossier-Browser ──
+        var tabDossier = new TabPage("Dossier-Browser");
+        _signals.SelectionChanged += (_, _) => ShowSelectedDossier();
+        var refreshSignals = new Button { Text = "Signale laden", Dock = DockStyle.Top, Height = 28 };
+        refreshSignals.Click += (_, _) => LoadSignals();
+        var left = new Panel { Dock = DockStyle.Left, Width = 360 };
+        left.Controls.Add(_signals);
+        left.Controls.Add(refreshSignals);
+        var dossierPanel = new Panel { Dock = DockStyle.Fill, Padding = new Padding(8) };
+        dossierPanel.Controls.Add(_dossier);
+        tabDossier.Controls.Add(dossierPanel);
+        tabDossier.Controls.Add(left);
+
+        // ── Tab: Berichte ──
+        var tabReports = new TabPage("Berichte");
+        var refreshReports = new Button { Text = "Berichte laden", Dock = DockStyle.Top, Height = 28 };
+        refreshReports.Click += (_, _) => LoadReports();
+        tabReports.Controls.Add(_reportsGrid);
+        tabReports.Controls.Add(refreshReports);
+
+        // ── Tab: Settings (Info) ──
+        var tabSettings = new TabPage("Settings");
+        tabSettings.Controls.Add(new Label
+        {
+            Dock = DockStyle.Fill, Padding = new Padding(16),
+            Text =
+                "Supervisor – read-only Analyse/Forensik über alle Module.\n\n" +
+                "OpenRouter-Key:  env IBKRTRADER_OPENROUTER_KEY  oder Datei 'openrouter.key' (gitignored).\n" +
+                $"   Status: {(string.IsNullOrEmpty(OpenRouterClient.DefaultApiKeyProvider()) ? "NICHT gesetzt – Chat nicht verfügbar" : "gesetzt")}\n\n" +
+                "Tagesbericht (opt-in):  env IBKRTRADER_SUPERVISOR_DAILY = Stunde 0–23.\n" +
+                "MCP-Light (opt-in):     env IBKRTRADER_MCP_PORT = Port (bindet nur 127.0.0.1).\n\n" +
+                "Sicherheit: OpenRouter ist ein bewusst freigegebener externer Datenempfänger. Es werden nur\n" +
+                "Analyse-Daten der Tools gesendet, niemals Secrets. Kein Tool kann handeln oder schreiben."
+        });
+
+        tabs.TabPages.AddRange(new[] { tabChat, tabDossier, tabReports, tabSettings });
+        Controls.Add(tabs);
+    }
+
+    // ── Analyse ──
+
+    private async Task AskAsync()
+    {
+        var question = _question.Text.Trim();
+        if (string.IsNullOrEmpty(question)) return;
+
+        _ask.Enabled = false;
+        _answer.Clear();
+        var profile = SupervisorProfiles.ByName(_profile.Text);
+        var progress = new Progress<string>(s => AppendLine(s));
+
+        try
+        {
+            var result = await _agent.AskAsync(question, profile: profile, progress: progress);
+            AppendLine("");
+            AppendLine("─── Antwort ───");
+            AppendLine(result.Answer);
+
+            _reports.Insert(new SupervisorReport
+            {
+                Profile = profile.Name,
+                Model = SupervisorAgent.DefaultModel,
+                Question = question,
+                Answer = result.Answer,
+                ToolCallsJson = JsonSerializer.Serialize(result.ToolInvocations.Select(i => new { i.Tool, i.Arguments })),
+                ToolCallCount = result.ToolInvocations.Count,
+                PromptTokens = result.PromptTokens,
+                CompletionTokens = result.CompletionTokens
+            });
+        }
+        catch (Exception ex)
+        {
+            AppendLine("");
+            AppendLine($"FEHLER: {ex.Message}");
+            _logger.Warn("Supervisor", $"Analyse fehlgeschlagen: {ex.Message}");
+        }
+        finally
+        {
+            _ask.Enabled = true;
+        }
+    }
+
+    private void AppendLine(string text)
+    {
+        if (_answer.InvokeRequired) { _answer.BeginInvoke(() => AppendLine(text)); return; }
+        _answer.AppendText(text + "\n");
+        _answer.ScrollToCaret();
+    }
+
+    // ── Dossier ──
+
+    private void LoadSignals()
+    {
+        try { _signals.DataSource = _dossiers.RecentSignals(200); }
+        catch (Exception ex) { _logger.Warn("Supervisor", $"Signale laden fehlgeschlagen: {ex.Message}"); }
+    }
+
+    private void ShowSelectedDossier()
+    {
+        if (_signals.CurrentRow?.DataBoundItem is not SignalSummary s) return;
+        try { _dossier.Text = DossierBuilder.ToMarkdown(_dossiers.BuildForSignal(s.SignalId)); }
+        catch (Exception ex) { _dossier.Text = $"FEHLER: {ex.Message}"; }
+    }
+
+    // ── Berichte ──
+
+    private void LoadReports()
+    {
+        try
+        {
+            _reportsGrid.DataSource = _reports.GetRecent(100)
+                .Select(r => new { r.CreatedAt, r.Profile, r.Model, r.Question, r.ToolCallCount, r.PromptTokens, r.CompletionTokens })
+                .ToList();
+        }
+        catch (Exception ex) { _logger.Warn("Supervisor", $"Berichte laden fehlgeschlagen: {ex.Message}"); }
+    }
+}

tests/IBKRTrader.Tests/Analytics/DossierBuilderTests.cs

@@ -0,0 +1,44 @@
+using FluentAssertions;
+using IBKRTrader.Core.Analytics;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence.Entities;
+
+namespace IBKRTrader.Tests.Analytics;
+
+[Trait("cat", "unit")]
+public class DossierBuilderTests
+{
+    [Fact]
+    public void Build_OrdersEverythingChronologically()
+    {
+        var decisions = new[]
+        {
+            new CoreDecisionRecord { SignalId = "s", Timestamp = new DateTime(2026,1,1,0,2,0,DateTimeKind.Utc), Decision = TradeDecision.Executed },
+            new CoreDecisionRecord { SignalId = "s", Timestamp = new DateTime(2026,1,1,0,1,0,DateTimeKind.Utc), Decision = TradeDecision.Skipped }
+        };
+
+        var dossier = DossierBuilder.Build("s", decisions,
+            Array.Empty<CoreOrderEvent>(), Array.Empty<CoreTrade>(), Array.Empty<LogJson.ParsedLogLine>());
+
+        dossier.Decisions[0].Decision.Should().Be(TradeDecision.Skipped);   // frühester zuerst
+        dossier.Decisions[1].Decision.Should().Be(TradeDecision.Executed);
+    }
+
+    [Fact]
+    public void ToMarkdown_And_ToJson_ContainSignalId_AndData()
+    {
+        var decisions = new[]
+        {
+            new CoreDecisionRecord { SignalId = "sig-9", Module = "CT", Symbol = "AAPL", Side = "BUY",
+                Decision = TradeDecision.Rejected, Reason = DecisionReason.RiskRejected, Message = "Limit überschritten" }
+        };
+        var dossier = DossierBuilder.Build("sig-9", decisions,
+            Array.Empty<CoreOrderEvent>(), Array.Empty<CoreTrade>(), Array.Empty<LogJson.ParsedLogLine>());
+
+        var md = DossierBuilder.ToMarkdown(dossier);
+        md.Should().Contain("sig-9").And.Contain("RiskRejected").And.Contain("Limit überschritten");
+
+        var json = DossierBuilder.ToJson(dossier);
+        json.Should().Contain("sig-9").And.Contain("RiskRejected");
+    }
+}

tests/IBKRTrader.Tests/Analytics/RealizedPnlEngineTests.cs

@@ -0,0 +1,85 @@
+using FluentAssertions;
+using IBKRTrader.Core.Analytics;
+using IBKRTrader.Core.Persistence.Entities;
+
+namespace IBKRTrader.Tests.Analytics;
+
+[Trait("cat", "unit")]
+public class RealizedPnlEngineTests
+{
+    private static CoreTrade Fill(string action, decimal qty, decimal price, int minute, string symbol = "AAPL") =>
+        new()
+        {
+            Module = "CT", Symbol = symbol, Action = action,
+            Quantity = qty, Price = price, TotalValue = qty * price,
+            TradedAt = new DateTime(2026, 1, 1, 0, minute, 0, DateTimeKind.Utc)
+        };
+
+    [Fact]
+    public void BuyThenSellAll_RealizesFullPnl()
+    {
+        var fills = new[] { Fill("BUY", 10, 100m, 0), Fill("SELL", 10, 130m, 1) };
+
+        var realized = RealizedPnlEngine.Match(fills);
+
+        realized.Should().HaveCount(1);
+        realized[0].RealizedPnl.Should().Be(300m);  // (130-100)*10
+    }
+
+    [Fact]
+    public void Sell_MatchesOldestLotsFirst_Fifo()
+    {
+        var fills = new[]
+        {
+            Fill("BUY", 10, 100m, 0),
+            Fill("BUY", 10, 120m, 1),
+            Fill("SELL", 15, 130m, 2)   // 10 gegen 100er-Lot, 5 gegen 120er-Lot
+        };
+
+        var realized = RealizedPnlEngine.Match(fills);
+
+        realized.Should().HaveCount(2);
+        realized[0].RealizedPnl.Should().Be((130m - 100m) * 10m);  // 300
+        realized[1].RealizedPnl.Should().Be((130m - 120m) * 5m);   // 50
+        RealizedPnlEngine.TotalRealized(fills).Should().Be(350m);
+    }
+
+    [Fact]
+    public void PartialSell_LeavesRemainderOpen()
+    {
+        var fills = new[] { Fill("BUY", 10, 100m, 0), Fill("SELL", 4, 130m, 1) };
+
+        var realized = RealizedPnlEngine.Match(fills);
+
+        realized.Should().HaveCount(1);
+        realized[0].Quantity.Should().Be(4m);
+        realized[0].RealizedPnl.Should().Be(120m);
+    }
+
+    [Fact]
+    public void SellExceedingHoldings_IgnoresSurplus_NoShort()
+    {
+        var fills = new[] { Fill("BUY", 5, 100m, 0), Fill("SELL", 8, 130m, 1) };
+
+        var realized = RealizedPnlEngine.Match(fills);
+
+        realized.Should().HaveCount(1);
+        realized[0].Quantity.Should().Be(5m);   // nur die gehaltenen 5 realisiert
+    }
+
+    [Fact]
+    public void SeparatesBySymbol()
+    {
+        var fills = new[]
+        {
+            Fill("BUY", 10, 100m, 0, "AAPL"),
+            Fill("BUY", 10, 50m, 1, "MSFT"),
+            Fill("SELL", 10, 130m, 2, "AAPL")
+        };
+
+        var realized = RealizedPnlEngine.Match(fills);
+
+        realized.Should().HaveCount(1);
+        realized[0].Symbol.Should().Be("AAPL");
+    }
+}

tests/IBKRTrader.Tests/Analytics/TradeAnalyticsTests.cs

@@ -0,0 +1,65 @@
+using FluentAssertions;
+using IBKRTrader.Core.Analytics;
+using IBKRTrader.Core.Persistence.Entities;
+
+namespace IBKRTrader.Tests.Analytics;
+
+[Trait("cat", "unit")]
+public class TradeAnalyticsTests
+{
+    private static CoreTrade Fill(string module, string action, decimal qty, decimal price, int minute, string symbol = "AAPL") =>
+        new()
+        {
+            Module = module, Symbol = symbol, Action = action,
+            Quantity = qty, Price = price, TotalValue = qty * price,
+            TradedAt = new DateTime(2026, 1, 1, 0, minute, 0, DateTimeKind.Utc)
+        };
+
+    [Fact]
+    public void EmptyInput_YieldsZeroKpis()
+    {
+        var k = TradeAnalytics.ComputeKpis(Array.Empty<CoreTrade>());
+
+        k.TradeCount.Should().Be(0);
+        k.NetPnl.Should().Be(0m);
+        k.WinRatePct.Should().Be(0d);
+    }
+
+    [Fact]
+    public void ComputesWinRateAndProfitFactor()
+    {
+        var fills = new[]
+        {
+            Fill("CT", "BUY", 10, 100m, 0),
+            Fill("CT", "SELL", 10, 130m, 1),  // +300 Gewinner
+            Fill("CT", "BUY", 10, 100m, 2, "MSFT"),
+            Fill("CT", "SELL", 10, 90m, 3, "MSFT")  // -100 Verlierer
+        };
+
+        var k = TradeAnalytics.ComputeKpis(fills);
+
+        k.TradeCount.Should().Be(2);
+        k.NetPnl.Should().Be(200m);
+        k.WinRatePct.Should().Be(50d);
+        k.ProfitFactor.Should().Be(3d);   // 300 / 100
+    }
+
+    [Fact]
+    public void PnlByModule_GroupsAndSorts()
+    {
+        var fills = new[]
+        {
+            Fill("A", "BUY", 10, 100m, 0),
+            Fill("A", "SELL", 10, 130m, 1),   // +300
+            Fill("B", "BUY", 10, 100m, 2, "MSFT"),
+            Fill("B", "SELL", 10, 90m, 3, "MSFT")  // -100
+        };
+
+        var buckets = TradeAnalytics.PnlByModule(fills);
+
+        buckets.Should().HaveCount(2);
+        buckets[0].Key.Should().Be("A");
+        buckets[0].Pnl.Should().Be(300m);
+        buckets[1].Key.Should().Be("B");
+    }
+}

tests/IBKRTrader.Tests/IBKRTrader.Tests.csproj

@@ -24,6 +24,8 @@
   <ItemGroup>
     <ProjectReference Include="..\..\src\IBKRTrader.Core\IBKRTrader.Core.csproj" />
     <ProjectReference Include="..\..\src\IBKRTrader.Modules.CongressTrading\IBKRTrader.Modules.CongressTrading.csproj" />
+    <ProjectReference Include="..\..\src\IBKRTrader.Modules.Accounting\IBKRTrader.Modules.Accounting.csproj" />
+    <ProjectReference Include="..\..\src\IBKRTrader.Modules.Supervisor\IBKRTrader.Modules.Supervisor.csproj" />
   </ItemGroup>
 
   <ItemGroup>

tests/IBKRTrader.Tests/Logging/LogJsonTests.cs

@@ -0,0 +1,43 @@
+using FluentAssertions;
+using IBKRTrader.Core.Logging;
+
+namespace IBKRTrader.Tests.Logging;
+
+[Trait("cat", "unit")]
+public class LogJsonTests
+{
+    [Fact]
+    public void RoundTrip_PreservesFields()
+    {
+        var ts = new DateTime(2026, 7, 30, 12, 34, 56, DateTimeKind.Utc);
+        var line = LogJson.WriteLine(ts, AppLogLevel.Warn, "CT", "Kurs fehlt für AAPL", "sig-123");
+
+        var parsed = LogJson.ParseLine(line);
+
+        parsed.Should().NotBeNull();
+        parsed!.Ts.Should().Be(ts);
+        parsed.Level.Should().Be("Warn");
+        parsed.Source.Should().Be("CT");
+        parsed.Cid.Should().Be("sig-123");
+        parsed.Message.Should().Be("Kurs fehlt für AAPL");
+    }
+
+    [Fact]
+    public void WriteLine_OmitsCid_WhenNull()
+    {
+        var line = LogJson.WriteLine(DateTime.UtcNow, AppLogLevel.Info, "Core", "hello", null);
+
+        line.Should().NotContain("cid");
+        LogJson.ParseLine(line)!.Cid.Should().BeNull();
+    }
+
+    [Theory]
+    [InlineData("")]
+    [InlineData("   ")]
+    [InlineData("nicht json")]
+    [InlineData("{ kaputt")]
+    public void ParseLine_ReturnsNull_OnGarbage(string input)
+    {
+        LogJson.ParseLine(input).Should().BeNull();
+    }
+}

tests/IBKRTrader.Tests/Modules/Accounting/AccountingClassifierTests.cs

@@ -0,0 +1,58 @@
+using FluentAssertions;
+using IBKRTrader.Modules.Accounting.Logic;
+using IBKRTrader.Modules.Accounting.Models;
+
+namespace IBKRTrader.Tests.Modules.Accounting;
+
+[Trait("cat", "unit")]
+public class AccountingClassifierTests
+{
+    [Fact]
+    public void ClassifyExecution_Buy_CostsGrossPlusFee()
+    {
+        var e = new RawExecution { AccountId = "U1", TradeId = "T1", Side = "BUY", GrossBase = 1000m, FeeBase = 1m, Quantity = 10, Currency = "USD" };
+
+        var entry = AccountingClassifier.ClassifyExecution(e, 5);
+
+        entry.EventType.Should().Be(LedgerEventType.TradeBuy);
+        entry.NetBase.Should().Be(-1001m);
+        entry.IdempotencyKey.Should().Be("TRD|TradeBuy|T1");
+        entry.IngestBatchId.Should().Be(5);
+    }
+
+    [Fact]
+    public void ClassifyExecution_Sell_BringsGrossMinusFee()
+    {
+        var e = new RawExecution { AccountId = "U1", TradeId = "T2", Side = "SELL", GrossBase = 1300m, FeeBase = 1m };
+
+        var entry = AccountingClassifier.ClassifyExecution(e, 1);
+
+        entry.EventType.Should().Be(LedgerEventType.TradeSell);
+        entry.NetBase.Should().Be(1299m);
+    }
+
+    [Theory]
+    [InlineData("Dividends", LedgerEventType.Dividend)]
+    [InlineData("Withholding Tax", LedgerEventType.TaxWithholding)]
+    [InlineData("Broker Interest Received", LedgerEventType.Interest)]
+    [InlineData("Deposit", LedgerEventType.Deposit)]
+    [InlineData("Withdrawal", LedgerEventType.Withdrawal)]
+    public void MapCashType_MapsKnownTypes(string ibkrType, LedgerEventType expected)
+    {
+        AccountingClassifier.MapCashType(ibkrType).Should().Be(expected);
+    }
+
+    [Fact]
+    public void ClassifyCashTransaction_KeepsReportedSign()
+    {
+        var div = new RawCashTransaction { AccountId = "U1", TransactionId = "C1", Type = "Dividends", AmountBase = 50m };
+        var tax = new RawCashTransaction { AccountId = "U1", TransactionId = "C2", Type = "Withholding Tax", AmountBase = -7.5m };
+
+        AccountingClassifier.ClassifyCashTransaction(div, 1).NetBase.Should().Be(50m);
+        var t = AccountingClassifier.ClassifyCashTransaction(tax, 1);
+        t.EventType.Should().Be(LedgerEventType.TaxWithholding);
+        t.NetBase.Should().Be(-7.5m);
+        t.GrossBase.Should().Be(7.5m);
+        t.IdempotencyKey.Should().Be("CASH|TaxWithholding|C2");
+    }
+}

tests/IBKRTrader.Tests/Modules/Accounting/AccountingEngineTests.cs

@@ -0,0 +1,75 @@
+using FluentAssertions;
+using IBKRTrader.Modules.Accounting.Logic;
+using IBKRTrader.Modules.Accounting.Models;
+
+namespace IBKRTrader.Tests.Modules.Accounting;
+
+[Trait("cat", "unit")]
+public class AccountingEngineTests
+{
+    private static LedgerEntry E(LedgerEventType type, decimal net, decimal gross, int day, decimal fee = 0m) =>
+        new()
+        {
+            AccountId = "U1", EventType = type, NetBase = net, GrossBase = gross, FeeBase = fee,
+            Timestamp = new DateTime(2026, 3, day, 12, 0, 0, DateTimeKind.Utc)
+        };
+
+    [Fact]
+    public void Statement_SatisfiesBalanceInvariant()
+    {
+        var entries = new[]
+        {
+            E(LedgerEventType.Deposit, 1000m, 1000m, 1),
+            E(LedgerEventType.TradeBuy, -500m, 499m, 2, fee: 1m),
+            E(LedgerEventType.TradeSell, 650m, 651m, 3, fee: 1m),
+            E(LedgerEventType.Dividend, 20m, 20m, 4),
+            E(LedgerEventType.Withdrawal, -200m, 200m, 5)
+        };
+
+        var s = AccountingEngine.BuildStatement(entries, new DateTime(2026, 3, 1, 0, 0, 0, DateTimeKind.Utc),
+            new DateTime(2026, 3, 31, 23, 59, 59, DateTimeKind.Utc), "U1");
+
+        // Invariante: Endsaldo − Anfang = Ergebnis + Einzahlungen − Auszahlungen
+        s.BalanceChange.Should().Be(s.NetTradingResult + s.Deposits - s.Withdrawals);
+        s.Deposits.Should().Be(1000m);
+        s.Withdrawals.Should().Be(200m);
+        s.Dividends.Should().Be(20m);
+        s.Fees.Should().Be(2m);
+        s.TradeCount.Should().Be(2);
+        s.ClosingBalance.Should().Be(970m);   // 1000 -500 +650 +20 -200
+    }
+
+    [Fact]
+    public void OpeningBalance_AccumulatesEntriesBeforeFrom()
+    {
+        var entries = new[]
+        {
+            E(LedgerEventType.Deposit, 500m, 500m, 1),     // vor dem Zeitraum
+            E(LedgerEventType.Dividend, 30m, 30m, 20)      // im Zeitraum
+        };
+
+        var s = AccountingEngine.BuildStatement(entries, new DateTime(2026, 3, 10, 0, 0, 0, DateTimeKind.Utc),
+            new DateTime(2026, 3, 31, 0, 0, 0, DateTimeKind.Utc), "U1");
+
+        s.OpeningBalance.Should().Be(500m);
+        s.ClosingBalance.Should().Be(530m);
+    }
+
+    [Fact]
+    public void MonthlyBreakdown_ChainsOpeningBalances()
+    {
+        var entries = new[]
+        {
+            E(LedgerEventType.Deposit, 100m, 100m, 1),   // März
+            E(LedgerEventType.Dividend, 10m, 10m, 5)
+        };
+
+        var monthly = AccountingEngine.BuildMonthlyBreakdown(entries,
+            new DateTime(2026, 3, 1, 0, 0, 0, DateTimeKind.Utc),
+            new DateTime(2026, 4, 30, 0, 0, 0, DateTimeKind.Utc), "U1");
+
+        monthly.Should().HaveCount(2);
+        monthly[0].From.Month.Should().Be(3);
+        monthly[1].OpeningBalance.Should().Be(monthly[0].ClosingBalance);  // April startet mit März-Endsaldo
+    }
+}

tests/IBKRTrader.Tests/Modules/Accounting/AccountingIngestServiceTests.cs

@@ -0,0 +1,101 @@
+using FluentAssertions;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Modules.Accounting.Models;
+using IBKRTrader.Modules.Accounting.Persistence;
+using IBKRTrader.Modules.Accounting.Services;
+using Microsoft.EntityFrameworkCore;
+
+namespace IBKRTrader.Tests.Modules.Accounting;
+
+/// <summary>Ingest-Kern gegen EF-InMemory: Idempotenz (Doppel-Ingest bucht nicht doppelt) + Balance-Anker.</summary>
+[Trait("cat", "unit")]
+public class AccountingIngestServiceTests
+{
+    private sealed class Factory(DbContextOptions<AccountingDbContext> options) : IDbContextFactory<AccountingDbContext>
+    {
+        public AccountingDbContext CreateDbContext() => new(options);
+    }
+
+    private sealed class FakeStatement : IStatementSource
+    {
+        public IReadOnlyList<RawExecution> Executions = Array.Empty<RawExecution>();
+        public IReadOnlyList<RawCashTransaction> Cash = Array.Empty<RawCashTransaction>();
+        public Task<IReadOnlyList<RawExecution>> GetExecutionsAsync(string a, DateTime? s, CancellationToken ct) => Task.FromResult(Executions);
+        public Task<IReadOnlyList<RawCashTransaction>> GetCashTransactionsAsync(string a, DateTime? s, CancellationToken ct) => Task.FromResult(Cash);
+    }
+
+    private sealed class FakeBalance(decimal? v) : IBalanceAnchorSource
+    {
+        public Task<decimal?> GetBalanceAsync(string a, CancellationToken ct) => Task.FromResult(v);
+    }
+
+    private static (AccountingIngestService svc, ILedgerRepository ledger) Build(FakeStatement stmt, decimal? anchor = null)
+    {
+        var opts = new DbContextOptionsBuilder<AccountingDbContext>()
+            .UseInMemoryDatabase(Guid.NewGuid().ToString()).Options;
+        var dbf = new Factory(opts);
+        var ledger = new EfLedgerRepository(dbf);
+        var svc = new AccountingIngestService(
+            new NullAccountSource(), ledger, new EfIngestRunRepository(dbf), new EfRawSnapshotRepository(dbf),
+            stmt, new FakeBalance(anchor), new LoggingService());
+        return (svc, ledger);
+    }
+
+    [Fact]
+    public async Task DoubleIngest_IsIdempotent()
+    {
+        var stmt = new FakeStatement
+        {
+            Executions = new[]
+            {
+                new RawExecution { AccountId = "U1", TradeId = "T1", Side = "BUY", GrossBase = 1000m, FeeBase = 1m,
+                    Timestamp = new DateTime(2026, 1, 1, 10, 0, 0, DateTimeKind.Utc) }
+            },
+            Cash = new[]
+            {
+                new RawCashTransaction { AccountId = "U1", TransactionId = "C1", Type = "Dividends", AmountBase = 20m,
+                    Timestamp = new DateTime(2026, 1, 2, 10, 0, 0, DateTimeKind.Utc) }
+            }
+        };
+        var (svc, ledger) = Build(stmt);
+
+        var run1 = await svc.IngestAccountAsync("U1", backfill: true, CancellationToken.None);
+        var run2 = await svc.IngestAccountAsync("U1", backfill: true, CancellationToken.None);
+
+        run1.NewEntries.Should().Be(2);
+        run1.DuplicateEntries.Should().Be(0);
+        run2.NewEntries.Should().Be(0);         // zweiter Lauf bucht nichts neu
+        run2.DuplicateEntries.Should().Be(2);
+        ledger.Count("U1").Should().Be(2);
+    }
+
+    [Fact]
+    public async Task ComputesBalanceDelta_AgainstAnchor()
+    {
+        var stmt = new FakeStatement
+        {
+            Cash = new[]
+            {
+                new RawCashTransaction { AccountId = "U1", TransactionId = "D1", Type = "Deposit", AmountBase = 1000m,
+                    Timestamp = new DateTime(2026, 1, 1, 10, 0, 0, DateTimeKind.Utc) }
+            }
+        };
+        var (svc, _) = Build(stmt, anchor: 1000m);
+
+        var run = await svc.IngestAccountAsync("U1", backfill: true, CancellationToken.None);
+
+        run.LedgerNetBase.Should().Be(1000m);
+        run.BalanceAnchorBase.Should().Be(1000m);
+        run.BalanceDeltaBase.Should().Be(0m);   // vollständig
+    }
+
+    [Fact]
+    public async Task NoAccounts_IngestAll_DoesNothing()
+    {
+        var (svc, ledger) = Build(new FakeStatement());
+
+        await svc.IngestAllAsync(backfill: false, CancellationToken.None);
+
+        ledger.DistinctAccounts().Should().BeEmpty();
+    }
+}

tests/IBKRTrader.Tests/Modules/Accounting/CsvExporterTests.cs

@@ -0,0 +1,59 @@
+using FluentAssertions;
+using IBKRTrader.Modules.Accounting.Logic;
+using IBKRTrader.Modules.Accounting.Models;
+
+namespace IBKRTrader.Tests.Modules.Accounting;
+
+[Trait("cat", "unit")]
+public class CsvExporterTests
+{
+    [Fact]
+    public void Ledger_HasHeader_AndInvariantFormatting()
+    {
+        var entries = new[]
+        {
+            new LedgerEntry
+            {
+                AccountId = "U1", EventType = LedgerEventType.TradeSell, Side = "SELL", Symbol = "AAPL",
+                Currency = "USD", Quantity = 10m, PriceNative = 130.5m, GrossBase = 1305m, FeeBase = 1m,
+                NetBase = 1304m, TransactionId = "T1", Source = "ibkr-flex",
+                Timestamp = new DateTime(2026, 1, 2, 15, 4, 5, DateTimeKind.Utc)
+            }
+        };
+
+        var csv = CsvExporter.Ledger(entries);
+
+        csv.Should().StartWith("Timestamp,AccountId,EventType,Side,Symbol");
+        csv.Should().Contain("2026-01-02 15:04:05");
+        csv.Should().Contain("130.5");     // Punkt-Dezimal, kulturinvariant
+        csv.Should().Contain("TradeSell");
+    }
+
+    [Fact]
+    public void Quote_EscapesCommasAndQuotes()
+    {
+        var entries = new[]
+        {
+            new LedgerEntry { AccountId = "U1", Symbol = "A,B\"C", EventType = LedgerEventType.Other, TransactionId = "X" }
+        };
+
+        var csv = CsvExporter.Ledger(entries);
+
+        csv.Should().Contain("\"A,B\"\"C\"");
+    }
+
+    [Fact]
+    public void Statement_ListsKeyMetrics()
+    {
+        var s = new PeriodStatement("U1", DateTime.UtcNow.AddDays(-30), DateTime.UtcNow,
+            OpeningBalance: 100m, ClosingBalance: 150m, Deposits: 50m, Withdrawals: 0m,
+            TradeVolume: 200m, Dividends: 5m, Interest: 0m, Fees: 2m, TaxWithheld: 1m,
+            NetTradingResult: 0m, TradeCount: 3, EntryCount: 6);
+
+        var csv = CsvExporter.Statement(s, "USD");
+
+        csv.Should().Contain("Kennzahl,USD");
+        csv.Should().Contain("Anfangssaldo,100");
+        csv.Should().Contain("Endsaldo,150");
+    }
+}

tests/IBKRTrader.Tests/Modules/Accounting/FxConverterTests.cs

@@ -0,0 +1,39 @@
+using FluentAssertions;
+using IBKRTrader.Modules.Accounting.Logic;
+using IBKRTrader.Modules.Accounting.Models;
+
+namespace IBKRTrader.Tests.Modules.Accounting;
+
+[Trait("cat", "unit")]
+public class FxConverterTests
+{
+    private static FxRate R(int day, decimal rate) =>
+        new() { Date = new DateTime(2026, 5, day), UsdToEur = rate, Source = "ECB" };
+
+    [Fact]
+    public void UsesNearestRateOnOrBefore()
+    {
+        var conv = new FxConverter(new[] { R(1, 0.90m), R(10, 0.92m) });
+
+        conv.UsdToEurOn(new DateTime(2026, 5, 5)).Should().Be(0.90m);   // zwischen 1. und 10. → 0.90
+        conv.UsdToEurOn(new DateTime(2026, 5, 10)).Should().Be(0.92m);  // exakt
+        conv.UsdToEurOn(new DateTime(2026, 5, 20)).Should().Be(0.92m);  // nach letztem → letzter
+    }
+
+    [Fact]
+    public void ReturnsNull_WhenNoRateBeforeDate()
+    {
+        var conv = new FxConverter(new[] { R(10, 0.92m) });
+
+        conv.UsdToEurOn(new DateTime(2026, 5, 1)).Should().BeNull();
+        conv.UsdToEur(100m, new DateTime(2026, 5, 1)).Should().BeNull();
+    }
+
+    [Fact]
+    public void ConvertsAndRounds()
+    {
+        var conv = new FxConverter(new[] { R(1, 0.9123m) });
+
+        conv.UsdToEur(100m, new DateTime(2026, 5, 2)).Should().Be(91.23m);
+    }
+}

tests/IBKRTrader.Tests/Modules/Supervisor/McpJsonRpcTests.cs

@@ -0,0 +1,59 @@
+using FluentAssertions;
+using IBKRTrader.Modules.Supervisor.Agent;
+using IBKRTrader.Modules.Supervisor.Mcp;
+
+namespace IBKRTrader.Tests.Modules.Supervisor;
+
+[Trait("cat", "unit")]
+public class McpJsonRpcTests
+{
+    private static SupervisorToolRegistry Registry()
+    {
+        var reg = new SupervisorToolRegistry();
+        reg.Register(new SupervisorTool("echo", "Echo", """{"type":"object","properties":{"x":{"type":"string"}}}""",
+            args => SupervisorToolRegistry.GetString(args, "x") ?? ""));
+        return reg;
+    }
+
+    [Fact]
+    public void Initialize_ReturnsServerInfo()
+    {
+        var res = McpJsonRpc.Handle("""{"jsonrpc":"2.0","id":1,"method":"initialize"}""", Registry());
+        res.Should().Contain("ibkrtrader-supervisor").And.Contain("protocolVersion");
+    }
+
+    [Fact]
+    public void ToolsList_ListsTools()
+    {
+        var res = McpJsonRpc.Handle("""{"jsonrpc":"2.0","id":2,"method":"tools/list"}""", Registry());
+        res.Should().Contain("echo").And.Contain("inputSchema");
+    }
+
+    [Fact]
+    public void ToolsCall_ExecutesAndWrapsResult()
+    {
+        var res = McpJsonRpc.Handle(
+            """{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"echo","arguments":{"x":"hi"}}}""",
+            Registry());
+        res.Should().Contain("\"text\":\"hi\"").And.Contain("\"isError\":false");
+    }
+
+    [Fact]
+    public void UnknownMethod_ReturnsMethodNotFound()
+    {
+        var res = McpJsonRpc.Handle("""{"jsonrpc":"2.0","id":4,"method":"nope"}""", Registry());
+        res.Should().Contain("-32601");
+    }
+
+    [Fact]
+    public void ParseError_ReturnsMinus32700()
+    {
+        McpJsonRpc.Handle("{ kaputt", Registry()).Should().Contain("-32700");
+    }
+
+    [Fact]
+    public void Notification_WithoutId_ReturnsNull()
+    {
+        McpJsonRpc.Handle("""{"jsonrpc":"2.0","method":"ping"}""", Registry()).Should().BeNull();
+    }
+}

tests/IBKRTrader.Tests/Modules/Supervisor/OpenRouterClientTests.cs

@@ -0,0 +1,55 @@
+using FluentAssertions;
+using IBKRTrader.Modules.Supervisor.Agent;
+
+namespace IBKRTrader.Tests.Modules.Supervisor;
+
+[Trait("cat", "unit")]
+public class OpenRouterClientTests
+{
+    private static SupervisorTool Tool() => new(
+        "get_kpis", "KPIs", """{"type":"object","properties":{"module":{"type":"string"}}}""", _ => "{}");
+
+    [Fact]
+    public void BuildRequestBody_IncludesModelMessagesAndTools()
+    {
+        var messages = new[] { ChatMessage.System("sys"), ChatMessage.User("frage?") };
+        var body = OpenRouterClient.BuildRequestBody("openrouter/auto", messages, new[] { Tool() });
+
+        body.Should().Contain("\"model\":\"openrouter/auto\"");
+        body.Should().Contain("\"role\":\"system\"");
+        body.Should().Contain("frage?");
+        body.Should().Contain("\"name\":\"get_kpis\"");
+        body.Should().Contain("\"parameters\"");
+    }
+
+    [Fact]
+    public void ParseResponse_ExtractsContentAndUsage()
+    {
+        const string json = """
+        {"choices":[{"message":{"content":"Antwort","role":"assistant"}}],
+         "usage":{"prompt_tokens":12,"completion_tokens":3}}
+        """;
+
+        var r = OpenRouterClient.ParseResponse(json);
+
+        r.Content.Should().Be("Antwort");
+        r.ToolCalls.Should().BeEmpty();
+        r.PromptTokens.Should().Be(12);
+        r.CompletionTokens.Should().Be(3);
+    }
+
+    [Fact]
+    public void ParseResponse_ExtractsToolCalls()
+    {
+        const string json = """
+        {"choices":[{"message":{"role":"assistant","content":null,
+          "tool_calls":[{"id":"call_1","type":"function","function":{"name":"get_kpis","arguments":"{\"module\":\"CT\"}"}}]}}]}
+        """;
+
+        var r = OpenRouterClient.ParseResponse(json);
+
+        r.ToolCalls.Should().HaveCount(1);
+        r.ToolCalls[0].Name.Should().Be("get_kpis");
+        r.ToolCalls[0].ArgumentsJson.Should().Contain("CT");
+    }
+}

tests/IBKRTrader.Tests/Modules/Supervisor/SupervisorAgentTests.cs

@@ -0,0 +1,75 @@
+using FluentAssertions;
+using IBKRTrader.Modules.Supervisor.Agent;
+
+namespace IBKRTrader.Tests.Modules.Supervisor;
+
+[Trait("cat", "unit")]
+public class SupervisorAgentTests
+{
+    /// <summary>Fake-Client: gibt vorab definierte Antworten der Reihe nach zurück.</summary>
+    private sealed class FakeChat : IChatCompletionClient
+    {
+        private readonly Queue<ChatResponse> _responses;
+        public List<string> SeenToolResults { get; } = new();
+        public FakeChat(params ChatResponse[] responses) => _responses = new(responses);
+
+        public Task<ChatResponse> CompleteAsync(string model, IReadOnlyList<ChatMessage> messages,
+            IReadOnlyList<SupervisorTool> tools, CancellationToken ct)
+        {
+            foreach (var m in messages)
+                if (m.Role == "tool" && m.Content != null) SeenToolResults.Add(m.Content);
+            return Task.FromResult(_responses.Dequeue());
+        }
+    }
+
+    private static SupervisorToolRegistry EchoRegistry()
+    {
+        var reg = new SupervisorToolRegistry();
+        reg.Register(new SupervisorTool("get_kpis", "KPIs", """{"type":"object"}""", _ => "{\"NetPnl\":42}"));
+        return reg;
+    }
+
+    [Fact]
+    public async Task RunsToolThenReturnsFinalAnswer()
+    {
+        var chat = new FakeChat(
+            new ChatResponse { ToolCalls = { new ToolCall("c1", "get_kpis", "{}") } },
+            new ChatResponse { Content = "Netto-PnL ist 42." });
+        var agent = new SupervisorAgent(chat, EchoRegistry());
+
+        var result = await agent.AskAsync("Wie ist die Performance?");
+
+        result.Answer.Should().Be("Netto-PnL ist 42.");
+        result.ToolInvocations.Should().ContainSingle();
+        result.ToolInvocations[0].Tool.Should().Be("get_kpis");
+        chat.SeenToolResults.Should().Contain(s => s.Contains("42"));   // Tool-Ergebnis ging ans Modell zurück
+    }
+
+    [Fact]
+    public async Task ProfileFilter_DeniesUnlistedTool()
+    {
+        var chat = new FakeChat(
+            new ChatResponse { ToolCalls = { new ToolCall("c1", "get_kpis", "{}") } },
+            new ChatResponse { Content = "fertig" });
+        // Technik-Profil listet get_kpis NICHT → Ausführung verweigert.
+        var agent = new SupervisorAgent(chat, EchoRegistry());
+
+        var result = await agent.AskAsync("test", profile: SupervisorProfiles.Technik);
+
+        result.ToolInvocations[0].Result.Should().Contain("nicht freigegeben");
+    }
+
+    [Fact]
+    public async Task StopsAfterMaxIterations()
+    {
+        // Modell fordert IMMER ein Tool an → harte Iterationsgrenze greift.
+        var always = Enumerable.Range(0, SupervisorAgent.MaxIterations + 2)
+            .Select(_ => new ChatResponse { ToolCalls = { new ToolCall("c", "get_kpis", "{}") } })
+            .ToArray();
+        var agent = new SupervisorAgent(new FakeChat(always), EchoRegistry());
+
+        var result = await agent.AskAsync("Endlosschleife?");
+
+        result.Answer.Should().Contain("maximale Tool-Iterationen");
+    }
+}

tests/IBKRTrader.Tests/Modules/Supervisor/SupervisorToolRegistryTests.cs

@@ -0,0 +1,47 @@
+using FluentAssertions;
+using IBKRTrader.Modules.Supervisor.Agent;
+
+namespace IBKRTrader.Tests.Modules.Supervisor;
+
+[Trait("cat", "unit")]
+public class SupervisorToolRegistryTests
+{
+    private static SupervisorToolRegistry WithEcho()
+    {
+        var reg = new SupervisorToolRegistry();
+        reg.Register(new SupervisorTool("echo", "Echo", """{"type":"object","properties":{"x":{"type":"string"}}}""",
+            args => SupervisorToolRegistry.GetString(args, "x") ?? "(leer)"));
+        return reg;
+    }
+
+    [Fact]
+    public void UnknownTool_ReturnsErrorText_DoesNotThrow()
+    {
+        var reg = WithEcho();
+        reg.Execute("nope", "{}").Should().StartWith("FEHLER: Unbekanntes Tool");
+    }
+
+    [Fact]
+    public void InvalidJsonArgs_ReturnsErrorText()
+    {
+        var reg = WithEcho();
+        reg.Execute("echo", "{ kaputt").Should().StartWith("FEHLER: Ungültige Tool-Argumente");
+    }
+
+    [Fact]
+    public void ExecutesRegisteredTool()
+    {
+        var reg = WithEcho();
+        reg.Execute("echo", """{"x":"hallo"}""").Should().Be("hallo");
+    }
+
+    [Fact]
+    public void ToolException_IsCaught_AsErrorText()
+    {
+        var reg = new SupervisorToolRegistry();
+        reg.Register(new SupervisorTool("boom", "Boom", """{"type":"object"}""",
+            _ => throw new InvalidOperationException("geplatzt")));
+
+        reg.Execute("boom", "{}").Should().Contain("geplatzt");
+    }
+}

tests/IBKRTrader.Tests/Persistence/AnalysisJournalsTests.cs

@@ -0,0 +1,72 @@
+using FluentAssertions;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence.Ef;
+using IBKRTrader.Core.Persistence.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace IBKRTrader.Tests.Persistence;
+
+/// <summary>Entscheidungsjournal + Order-Event-Log gegen EF-InMemory, inkl. Robustheits-Garantie.</summary>
+[Trait("cat", "unit")]
+public class AnalysisJournalsTests
+{
+    private sealed class Factory<T>(DbContextOptions<T> options) : IDbContextFactory<T> where T : DbContext
+    {
+        public T CreateDbContext() => (T)Activator.CreateInstance(typeof(T), options)!;
+    }
+
+    /// <summary>Factory, die immer wirft – simuliert einen DB-Ausfall.</summary>
+    private sealed class ThrowingFactory : IDbContextFactory<CoreDbContext>
+    {
+        public CoreDbContext CreateDbContext() => throw new InvalidOperationException("DB weg");
+    }
+
+    private static Factory<CoreDbContext> InMemory() =>
+        new(new DbContextOptionsBuilder<CoreDbContext>()
+            .UseInMemoryDatabase(Guid.NewGuid().ToString()).Options);
+
+    [Fact]
+    public void DecisionJournal_WritesAndQueriesBack()
+    {
+        var journal = new EfDecisionJournal(InMemory(), new LoggingService());
+
+        journal.Write(new CoreDecisionRecord
+        {
+            SignalId = "sig-1", Module = "CT", Symbol = "AAPL", Side = "BUY",
+            Decision = TradeDecision.Rejected, Reason = DecisionReason.RiskRejected, Message = "Limit"
+        });
+
+        var rows = journal.Query(d => d.SignalId == "sig-1");
+        rows.Should().HaveCount(1);
+        rows[0].Reason.Should().Be(DecisionReason.RiskRejected);
+    }
+
+    [Fact]
+    public void OrderEventLog_WritesAndQueriesBack()
+    {
+        var log = new EfOrderEventLog(InMemory(), new LoggingService());
+
+        log.Write(new CoreOrderEvent
+        {
+            SignalId = "sig-2", Module = "CT", Symbol = "AAPL",
+            EventType = OrderEventType.Filled, Side = "BUY", Quantity = 5, Price = 100m, Response = "OK"
+        });
+
+        var rows = log.Query(e => e.SignalId == "sig-2");
+        rows.Should().HaveCount(1);
+        rows[0].EventType.Should().Be(OrderEventType.Filled);
+    }
+
+    [Fact]
+    public void Write_NeverThrows_OnDbFailure()
+    {
+        var journal = new EfDecisionJournal(new ThrowingFactory(), new LoggingService());
+        var log = new EfOrderEventLog(new ThrowingFactory(), new LoggingService());
+
+        var writeJournal = () => journal.Write(new CoreDecisionRecord { SignalId = "x" });
+        var writeEvent   = () => log.Write(new CoreOrderEvent { SignalId = "x" });
+
+        writeJournal.Should().NotThrow();
+        writeEvent.Should().NotThrow();
+    }
+}

tests/IBKRTrader.Tests/Trading/ExecutionServiceTests.cs

@@ -1,5 +1,6 @@
 using FluentAssertions;
 using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence;
 using IBKRTrader.Core.Settings;
 using IBKRTrader.Core.Trading;
 using NSubstitute;
@@ -13,9 +14,11 @@ public class ExecutionServiceTests
     private readonly IRiskService      _risk      = Substitute.For<IRiskService>();
     private readonly IPortfolioService _portfolio = Substitute.For<IPortfolioService>();
     private readonly SettingsService   _settings  = new();
+    private readonly IDecisionJournal  _journal   = Substitute.For<IDecisionJournal>();
+    private readonly IOrderEventLog    _orderLog  = Substitute.For<IOrderEventLog>();
 
     private ExecutionService CreateSut() =>
-        new(_broker, _risk, _portfolio, _settings, new LoggingService());
+        new(_broker, _risk, _portfolio, _settings, new LoggingService(), _journal, _orderLog);
 
     private static readonly TradeSignal BuySignal = new()
     {
@@ -92,7 +95,7 @@ public class ExecutionServiceTests
         result.Executed.Should().BeTrue();
         result.Order!.OrderId.Should().Be("O1");
         await _portfolio.Received(1).RecordFillAsync(
-            "CT", "AAPL", TradeSide.Buy, 5, 100m, "O1", Arg.Any<CancellationToken>());
+            "CT", "AAPL", TradeSide.Buy, 5, 100m, "O1", Arg.Any<string?>(), Arg.Any<CancellationToken>());
     }
 
     [Fact]
@@ -107,6 +110,34 @@ public class ExecutionServiceTests
             Arg.Any<CancellationToken>());
     }
 
+    [Fact]
+    public async Task TradingDisabled_WritesSkippedDecision()
+    {
+        await CreateSut().ExecuteAsync(BuySignal);
+
+        _journal.Received().Write(Arg.Is<IBKRTrader.Core.Persistence.Entities.CoreDecisionRecord>(
+            d => d.Decision == IBKRTrader.Core.Persistence.Entities.TradeDecision.Skipped &&
+                 d.Reason == IBKRTrader.Core.Persistence.Entities.DecisionReason.TradingDisabled));
+    }
+
+    [Fact]
+    public async Task HappyPath_PropagatesSignalId_AndJournalsExecuted()
+    {
+        ArrangeHappyPath();
+        var signal = new TradeSignal { Symbol = "AAPL", Side = TradeSide.Buy, SourceModule = "CT", SignalId = "sig-abc" };
+
+        await CreateSut().ExecuteAsync(signal);
+
+        await _portfolio.Received(1).RecordFillAsync(
+            "CT", "AAPL", TradeSide.Buy, 5, 100m, "O1", "sig-abc", Arg.Any<CancellationToken>());
+        _journal.Received().Write(Arg.Is<IBKRTrader.Core.Persistence.Entities.CoreDecisionRecord>(
+            d => d.SignalId == "sig-abc" &&
+                 d.Decision == IBKRTrader.Core.Persistence.Entities.TradeDecision.Executed));
+        _orderLog.Received().Write(Arg.Is<IBKRTrader.Core.Persistence.Entities.CoreOrderEvent>(
+            e => e.SignalId == "sig-abc" &&
+                 e.EventType == IBKRTrader.Core.Persistence.Entities.OrderEventType.Filled));
+    }
+
     [Fact]
     public async Task OrderFails_ReturnsError_AndDoesNotBook()
     {
@@ -120,6 +151,6 @@ public class ExecutionServiceTests
         result.Reason.Should().Contain("Broker abgelehnt");
         await _portfolio.DidNotReceive().RecordFillAsync(
             Arg.Any<string>(), Arg.Any<string>(), Arg.Any<TradeSide>(),
-            Arg.Any<int>(), Arg.Any<decimal>(), Arg.Any<string>(), Arg.Any<CancellationToken>());
+            Arg.Any<int>(), Arg.Any<decimal>(), Arg.Any<string>(), Arg.Any<string?>(), Arg.Any<CancellationToken>());
     }
 }

tests/IBKRTrader.Tests/UiConstructionTests.cs

@@ -0,0 +1,87 @@
+using FluentAssertions;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence;
+using IBKRTrader.Core.Persistence.Ef;
+using IBKRTrader.Modules.Accounting.Persistence;
+using IBKRTrader.Modules.Accounting.Services;
+using IBKRTrader.Modules.Accounting.Ui;
+using IBKRTrader.Modules.Supervisor.Agent;
+using IBKRTrader.Modules.Supervisor.Persistence;
+using IBKRTrader.Modules.Supervisor.Services;
+using IBKRTrader.Modules.Supervisor.Ui;
+using Microsoft.EntityFrameworkCore;
+
+namespace IBKRTrader.Tests;
+
+/// <summary>
+/// Konstruiert die neuen Modul-Fenster mit In-Memory-/Stub-Abhängigkeiten – gleichwertig zum
+/// Headless-Smoke-UI-Check (`--smoke-ui`), aber ohne die laufende App/DB. Forms bauen im Konstruktor
+/// nur Controls (DB-Zugriff erst auf Interaktion), daher genügt Instanziierbarkeit der Services.
+/// </summary>
+[Trait("cat", "unit")]
+public class UiConstructionTests
+{
+    private sealed class Factory<T>(DbContextOptions<T> options) : IDbContextFactory<T> where T : DbContext
+    {
+        public T CreateDbContext() => (T)Activator.CreateInstance(typeof(T), options)!;
+    }
+
+    private static Factory<T> InMemory<T>() where T : DbContext =>
+        new(new DbContextOptionsBuilder<T>().UseInMemoryDatabase(Guid.NewGuid().ToString()).Options);
+
+    private sealed class NoChat : IChatCompletionClient
+    {
+        public Task<ChatResponse> CompleteAsync(string m, IReadOnlyList<ChatMessage> msgs,
+            IReadOnlyList<SupervisorTool> tools, CancellationToken ct) => Task.FromResult(new ChatResponse());
+    }
+
+    private static Exception? ConstructOnSta(Action action)
+    {
+        Exception? captured = null;
+        var t = new Thread(() => { try { action(); } catch (Exception ex) { captured = ex; } });
+        t.SetApartmentState(ApartmentState.STA);
+        t.Start();
+        t.Join();
+        return captured;
+    }
+
+    [Fact]
+    public void AccountingMainForm_Constructs()
+    {
+        var ex = ConstructOnSta(() =>
+        {
+            var logger = new LoggingService();
+            var accDbf = InMemory<AccountingDbContext>();
+            var ledger = new EfLedgerRepository(accDbf);
+            var runs = new EfIngestRunRepository(accDbf);
+            var report = new AccountingReportService(ledger, new EfFxRateRepository(accDbf));
+            var ingest = new AccountingIngestService(
+                new NullAccountSource(), ledger, runs, new EfRawSnapshotRepository(accDbf),
+                new NullStatementSource(), new NullBalanceAnchorSource(), logger);
+
+            using var form = new AccountingMainForm(ledger, runs, report, ingest, logger);
+            form.Text.Should().Be("Accounting");
+        });
+        ex.Should().BeNull();
+    }
+
+    [Fact]
+    public void SupervisorMainForm_Constructs()
+    {
+        var ex = ConstructOnSta(() =>
+        {
+            var logger = new LoggingService();
+            var coreDbf = InMemory<CoreDbContext>();
+            var supDbf = InMemory<SupervisorDbContext>();
+            IDecisionJournal journal = new EfDecisionJournal(coreDbf, logger);
+            IOrderEventLog orderLog = new EfOrderEventLog(coreDbf, logger);
+            var dossiers = new DossierService(journal, orderLog, new TradeLogReader(coreDbf));
+            var agent = new SupervisorAgent(new NoChat(), new SupervisorToolRegistry());
+            var reports = new EfSupervisorReportRepository(supDbf, logger);
+
+            using var form = new SupervisorMainForm(agent, dossiers, reports, logger);
+            form.Text.Should().Be("Supervisor");
+        });
+        ex.Should().BeNull();
+    }
+}