diff --git a/scripts/run.ts b/scripts/run.ts
index 6042442..f1572fc 100644
--- a/scripts/run.ts
+++ b/scripts/run.ts
@@ -81,6 +81,8 @@ async function main(): Promise<void> {
       dryRun = true;
     } else if (arg.startsWith('--api-base=')) {
       process.env.API_BASE = arg.slice('--api-base='.length).trim();
+    } else if (arg.startsWith('--session-id=')) {
+      process.env.SKILL_SESSION_ID = arg.slice('--session-id='.length).trim();
     } else if (arg === '-h' || arg === '--help') {
       printUsage(); process.exit(0);
     } else {
diff --git a/src/index.ts b/src/index.ts
index c1de23e..2a92092 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -12,6 +12,7 @@ export interface VisionConfig {
   apiKey: string;
   baseURL?: string;
   model: string;
+  sessionId?: string;
 }
 
 async function loadVisionConfig(client: ReturnType<typeof createSkillClient>): Promise<VisionConfig> {
@@ -22,6 +23,7 @@ async function loadVisionConfig(client: ReturnType<typeof createSkillClient>): P
     apiKey,
     baseURL: cfg.metadata?.provider?.base_url,
     model: process.env.VISION_MODEL ?? cfg.metadata?.provider?.model ?? 'aliyun-cp-multimodal',
+    sessionId: process.env.SKILL_SESSION_ID || `skill_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`,
   };
 }
 
@@ -415,7 +417,13 @@ function getFlag(args: string[], flag: string): string | undefined {
 }
 
 function createVisionModel(config: VisionConfig) {
-  const openai = createOpenAI({ apiKey: config.apiKey, baseURL: config.baseURL });
+  const headers: Record<string, string> = {
+    'x-langfuse-tags': 'skill:video-product-snapshot',
+  };
+  if (config.sessionId) {
+    headers['x-langfuse-session-id'] = config.sessionId;
+  }
+  const openai = createOpenAI({ apiKey: config.apiKey, baseURL: config.baseURL, headers });
   return openai(config.model);
 }
 
diff --git a/src/post-filter.ts b/src/post-filter.ts
index 719a324..b87e8b0 100644
--- a/src/post-filter.ts
+++ b/src/post-filter.ts
@@ -34,7 +34,13 @@ const FILTER_PROMPT = (count: number, description?: string) => {
 };
 
 function createModel(config: VisionConfig) {
-  const provider = createOpenAI({ apiKey: config.apiKey, baseURL: config.baseURL });
+  const headers: Record<string, string> = {
+    'x-langfuse-tags': 'skill:video-product-snapshot',
+  };
+  if (config.sessionId) {
+    headers['x-langfuse-session-id'] = config.sessionId;
+  }
+  const provider = createOpenAI({ apiKey: config.apiKey, baseURL: config.baseURL, headers });
   return provider(config.model);
 }
 
diff --git a/src/product-detector.ts b/src/product-detector.ts
index cfebd44..1e971aa 100644
--- a/src/product-detector.ts
+++ b/src/product-detector.ts
@@ -78,7 +78,13 @@ Return:
 - boundingBox: tight box of the PRODUCT ONLY as [x1, y1, x2, y2] normalized 0.0–1.0, top-left origin. Exclude hands, background, and unrelated objects. The product is near the center of the frame.`;
 
 function createVisionModel(config: VisionConfig) {
-  const provider = createOpenAI({ apiKey: config.apiKey, baseURL: config.baseURL });
+  const headers: Record<string, string> = {
+    'x-langfuse-tags': 'skill:video-product-snapshot',
+  };
+  if (config.sessionId) {
+    headers['x-langfuse-session-id'] = config.sessionId;
+  }
+  const provider = createOpenAI({ apiKey: config.apiKey, baseURL: config.baseURL, headers });
   return provider(config.model);
 }