Add fallback PromptKit profile assets

internal/framework/llm/promptkit_client.go

@@ -37,12 +37,13 @@ type PromptKitClientConfig struct {
 }
 
 type PromptKitClient struct {
-	engine          *promptkit.Engine
-	recorder        *LLMProfileRecorder
-	profileDir      string
-	profileFile     string
-	localEndpoint   string
-	reasoningEffort *string
+	engine                *promptkit.Engine
+	recorder              *LLMProfileRecorder
+	profileDir            string
+	profileFile           string
+	localEndpoint         string
+	fallbackProfileDigest string
+	reasoningEffort       *string
 }
 
 type LLMProfileRecorder struct {
@@ -69,7 +70,7 @@ func NewPromptKitClient(cfg PromptKitClientConfig) (*PromptKitClient, error) {
 	if err != nil {
 		return nil, err
 	}
-	options, err := cfg.Assets.PromptKitOptions()
+	options, fallbackProfileDigest, err := cfg.Assets.promptKitOptions()
 	if err != nil {
 		return nil, err
 	}
@@ -94,12 +95,13 @@ func NewPromptKitClient(cfg PromptKitClientConfig) (*PromptKitClient, error) {
 		reasoningEffort = &value
 	}
 	return &PromptKitClient{
-		engine:          engine,
-		recorder:        recorder,
-		profileDir:      profileSource.ProfileDir,
-		profileFile:     profileSource.ProfileFile,
-		localEndpoint:   profileSource.localEndpoint(),
-		reasoningEffort: reasoningEffort,
+		engine:                engine,
+		recorder:              recorder,
+		profileDir:            profileSource.ProfileDir,
+		profileFile:           profileSource.ProfileFile,
+		localEndpoint:         profileSource.localEndpoint(),
+		fallbackProfileDigest: fallbackProfileDigest,
+		reasoningEffort:       reasoningEffort,
 	}, nil
 }
 
@@ -325,7 +327,7 @@ func (c *PromptKitClient) LLMCheckpointFingerprints() ([]CheckpointFingerprint,
 	if c == nil {
 		return nil, nil
 	}
-	fingerprint, err := promptKitProfileFingerprint(c.profileDir, c.profileFile)
+	fingerprint, err := promptKitProfileFingerprint(c.profileDir, c.profileFile, c.fallbackProfileDigest)
 	if err != nil {
 		return nil, err
 	}