diff --git a/src/ClawdDotNet.Core/Runtimes/ForeignRunner.cs b/src/ClawdDotNet.Core/Runtimes/ForeignRunner.cs
index be2b7a4..08766e3 100644
--- a/src/ClawdDotNet.Core/Runtimes/ForeignRunner.cs
+++ b/src/ClawdDotNet.Core/Runtimes/ForeignRunner.cs
@@ -128,7 +128,16 @@ public sealed class ForeignRunner
             var result = await _sandbox.RunAsync(sandboxRequest, ct);
             var outcome = runtime.Interpret(result, context, note);
 
-            return outcome with { Text = WithProposal(outcome.Text, agent, request, runtime.Kind, work) };
+            // The run happened and was paid for — a proposal that cannot be kept must not
+            // turn it into "not run" and lose its usage.
+            try
+            {
+                return outcome with { Text = WithProposal(outcome.Text, agent, request, runtime.Kind, work) };
+            }
+            catch (ForeignRunException ex)
+            {
+                return outcome with { Text = (outcome.Text ?? "").TrimEnd() + $"\n\n[No proposal kept: {ex.Message}]" };
+            }
         }
         catch (ForeignRunException ex)
         {