Keep session IDs on repair requests and retire completed plans

internal/usecase/repairer.go

@@ -17,6 +17,7 @@ type OutputRepairer interface {
 type RepairRequest struct {
 	PreviousOutput   string
 	ValidationErrors []string
+	SessionID        string
 	Target           domain.ExecutionTarget
 	StructuredOutput *domain.StructuredOutputSpec
 	Attempt          int
@@ -42,23 +43,26 @@ func (r *defaultOutputRepairer) Repair(ctx context.Context, req RepairRequest) (
 		errs = strings.Join(req.ValidationErrors, "\n")
 	}
 
-	prompt := domain.RenderedPrompt{Messages: []domain.RenderedMessage{
-		{
-			Role:    "system",
-			Content: "You repair invalid JSON output. Return only corrected JSON. Do not include explanations or markdown code fences.",
+	prompt := domain.RenderedPrompt{
+		SessionID: req.SessionID,
+		Messages: []domain.RenderedMessage{
+			{
+				Role:    "system",
+				Content: "You repair invalid JSON output. Return only corrected JSON. Do not include explanations or markdown code fences.",
+			},
+			{
+				Role: "user",
+				Content: fmt.Sprintf(
+					"Repair attempt %d of %d for validation mode %s.\n\nValidation errors:\n%s\n\nPrevious output:\n%s\n\nReturn only corrected JSON.",
+					req.Attempt,
+					req.MaxAttempts,
+					req.Mode,
+					errs,
+					req.PreviousOutput,
+				),
+			},
 		},
-		{
-			Role: "user",
-			Content: fmt.Sprintf(
-				"Repair attempt %d of %d for validation mode %s.\n\nValidation errors:\n%s\n\nPrevious output:\n%s\n\nReturn only corrected JSON.",
-				req.Attempt,
-				req.MaxAttempts,
-				req.Mode,
-				errs,
-				req.PreviousOutput,
-			),
-		},
-	}}
+	}
 
 	resp, err := r.llm.Generate(ctx, domain.GenerateRequest{
 		Prompt:           prompt,