Keep checkpoints aligned with PromptKit profiles

internal/framework/llm/promptkit_client.go

@@ -29,8 +29,10 @@ type PromptKitClientConfig struct {
 }
 
 type PromptKitClient struct {
-	engine   *promptkit.Engine
-	recorder *LLMProfileRecorder
+	engine      *promptkit.Engine
+	recorder    *LLMProfileRecorder
+	profileDir  string
+	profileFile string
 }
 
 type LLMProfileRecorder struct {
@@ -70,8 +72,10 @@ func NewPromptKitClient(cfg PromptKitClientConfig) (*PromptKitClient, error) {
 		recorder = NewLLMProfileRecorder()
 	}
 	return &PromptKitClient{
-		engine:   engine,
-		recorder: recorder,
+		engine:      engine,
+		recorder:    recorder,
+		profileDir:  strings.TrimSpace(cfg.ProfileDir),
+		profileFile: strings.TrimSpace(cfg.ProfileFile),
 	}, nil
 }
 
@@ -261,6 +265,17 @@ func (c *PromptKitClient) LLMProfileManifests() []artifacts.LLMProfileManifest {
 	return c.recorder.Manifests()
 }
 
+func (c *PromptKitClient) LLMCheckpointFingerprints() ([]CheckpointFingerprint, error) {
+	if c == nil {
+		return nil, nil
+	}
+	fingerprint, err := promptKitProfileFingerprint(c.profileDir, c.profileFile)
+	if err != nil {
+		return nil, err
+	}
+	return []CheckpointFingerprint{fingerprint}, nil
+}
+
 func NewLLMProfileRecorder() *LLMProfileRecorder {
 	return &LLMProfileRecorder{profiles: map[string]artifacts.LLMProfileManifest{}}
 }