Implement ADR-0007

internal/cli/run.go

@@ -135,7 +135,7 @@ func runPipelineCommand(args []string, stdout, stderr io.Writer, opts Options) i
 	debug := fs.Bool("debug", false, "write a debug bundle")
 	debugDir := fs.String("debug-dir", "", "debug bundle directory")
 	llmProfile := fs.String("llm-profile", "", "LLM profile override")
-	resume := fs.Bool("resume", false, "reuse and record compatible checkpoints")
+	resume := fs.Bool("resume", false, "reuse compatible recorded checkpoints")
 	chunkCache := chunkCacheFlag{}
 	sessionID := sessionIDFlag{}
 	referenceFlags := stringListFlag{}
@@ -219,6 +219,10 @@ func runPipelineCommand(args []string, stdout, stderr io.Writer, opts Options) i
 		fmt.Fprintf(stderr, "notarius: %v\n", err)
 		return 1
 	}
+	if *resume && !cfg.Cache.Checkpoints.Enabled {
+		fmt.Fprintln(stderr, "notarius: --resume requires cache.checkpoints.enabled: true")
+		return 1
+	}
 
 	startedAt := opts.Now().UTC()
 	runID, err := opts.RunIDGenerator(startedAt)
@@ -437,7 +441,10 @@ func checkpointHandlersForRun(
 	sessionID string,
 	resume bool,
 ) (pipeline.CheckpointRecorder, pipeline.CheckpointLoader, error) {
-	if !resume {
+	if !settings.Enabled {
+		if resume {
+			return nil, nil, fmt.Errorf("--resume requires cache.checkpoints.enabled: true")
+		}
 		return pipeline.NoopCheckpointRecorder(), pipeline.NoopCheckpointLoader(), nil
 	}
 	identity, err := checkpoint.NewIdentity(checkpoint.IdentityInput{
@@ -463,9 +470,12 @@ func checkpointHandlersForRun(
 	if err != nil {
 		return nil, nil, fmt.Errorf("create checkpoint recorder: %w", err)
 	}
-	loader, err := checkpoint.NewFilesystemLoader(checkpointRoot, identity)
-	if err != nil {
-		return nil, nil, fmt.Errorf("create checkpoint loader: %w", err)
+	loader := pipeline.NoopCheckpointLoader()
+	if resume {
+		loader, err = checkpoint.NewFilesystemLoader(checkpointRoot, identity)
+		if err != nil {
+			return nil, nil, fmt.Errorf("create checkpoint loader: %w", err)
+		}
 	}
 	return recorder, loader, nil
 }