test(hooks): add image analyzer regression coverage

lib/hooks/image-analyzer-transformer.cjs

@@ -12,7 +12,7 @@
  *   CCS_CURRENT_PROVIDER                      - Current CLIProxy provider (e.g., agy, gemini, codex)
  *   CCS_IMAGE_ANALYSIS_TIMEOUT=60             - Timeout in seconds (default: 60)
  *   CCS_PROFILE_TYPE                          - Profile type (account/default skip)
- *   ANTHROPIC_MODEL                           - Fallback model if provider not in mapping
+ *   ANTHROPIC_MODEL                           - Chat model env (not used for image analysis fallback)
  *   CCS_DEBUG=1                               - Enable debug output
  *
  * Exit codes:
@@ -147,6 +147,46 @@ function parseProviderModels(envValue) {
   return result;
 }
 
+/**
+ * Extract concatenated text content from CLIProxy response blocks.
+ * Skips thinking and other non-text blocks.
+ */
+function extractTextContent(response) {
+  if (!response || !Array.isArray(response.content)) {
+    return null;
+  }
+
+  const textBlocks = response.content
+    .filter((block) => block && block.type === 'text' && typeof block.text === 'string')
+    .map((block) => block.text)
+    .filter((text) => text.trim());
+
+  if (textBlocks.length === 0) {
+    return null;
+  }
+
+  return textBlocks.join('\n\n');
+}
+
+/**
+ * Parse raw CLIProxy response body and extract text content.
+ */
+function parseCliProxyResponse(data) {
+  let response;
+  try {
+    response = JSON.parse(data);
+  } catch (err) {
+    throw new Error(`Failed to parse response: ${err.message}`);
+  }
+
+  const text = extractTextContent(response);
+  if (!text) {
+    throw new Error('No text content in response');
+  }
+
+  return text;
+}
+
 /**
  * Get model for current provider from provider_models mapping
  * Returns primary model only (for display/logging)
@@ -160,13 +200,14 @@ function getModelForProvider() {
 /**
  * Get list of models to try in order:
  * 1. provider_models[current_provider] (if exists)
- * 2. DEFAULT_MODEL
- * 3. ANTHROPIC_MODEL from profile (if different and exists)
+ * 2. DEFAULT_MODEL when no provider-specific vision model is configured
+ *
+ * ANTHROPIC_MODEL is intentionally ignored here because the chat model may
+ * not be vision-capable on the current provider route.
  */
 function getModelsToTry() {
   const currentProvider = process.env.CCS_CURRENT_PROVIDER || '';
   const providerModels = parseProviderModels(process.env.CCS_IMAGE_ANALYSIS_PROVIDER_MODELS);
-  const anthropicModel = process.env.ANTHROPIC_MODEL;
 
   const models = [];
   const seen = new Set();
@@ -185,9 +226,6 @@ function getModelsToTry() {
     seen.add(DEFAULT_MODEL);
   }
 
-  // 3. ANTHROPIC_MODEL fallback — skip, the main chat model is not
-  // necessarily vision-capable and adds unnecessary retry latency
-
   return models;
 }
 
@@ -381,20 +419,10 @@ function analyzeViaCliProxy(base64Data, mediaType, model, timeoutMs) {
           }
 
           try {
-            const response = JSON.parse(data);
-            // Find the first text block — skip thinking blocks which use
-            // .thinking instead of .text (e.g. codex models with thinking enabled)
-            const textBlock = response.content?.find(b => b.type === 'text' && b.text);
-            const text = textBlock?.text;
-
-            if (!text) {
-              reject(new Error('No text content in response'));
-              return;
-            }
-
+            const text = parseCliProxyResponse(data);
             resolve(text);
           } catch (err) {
-            reject(new Error(`Failed to parse response: ${err.message}`));
+            reject(err);
           }
         });
       }