repro: use simple echo hook and re-enable rich logging

packages/core/src/core/coreToolScheduler.ts

@@ -966,6 +966,10 @@ export class CoreToolScheduler {
       // The active tool is finished. Move it to the completed batch.
       const completedCall = activeCall as CompletedToolCall;
 
+      if (process.env['CI'] === 'true' || process.env['VERBOSE'] === 'true') {
+        console.log(`[CoreToolScheduler] Completed tool call: ${completedCall.request.name}, status: ${completedCall.status}`);
+      }
+
       this.completedToolCallsForBatch.push(completedCall);
       logToolCall(this.config, new ToolCallEvent(completedCall));
 

packages/core/src/hooks/hookRegistry.ts

@@ -233,6 +233,16 @@ please review the project settings (.gemini/settings.json) and remove them.`;
         } as HookRegistryEntry);
         const isDisabled = disabledHooks.includes(hookName);
 
+        if (process.env['CI'] === 'true' || process.env['VERBOSE'] === 'true') {
+          console.log(`[HookRegistry] Processing hook: "${hookName}"`);
+          if (isDisabled) {
+            console.log(`[HookRegistry] Hook is DISABLED (found in disabledHooks list)`);
+          }
+          if (disabledHooks.length > 0) {
+            console.log(`[HookRegistry] Current disabledHooks: ${JSON.stringify(disabledHooks)}`);
+          }
+        }
+
         // Add source to hook config
         hookConfig.source = source;
 

packages/core/src/hooks/hookRunner.ts

@@ -268,6 +268,12 @@ export class HookRunner {
         shellConfig.shell,
       );
 
+      if (process.env['CI'] === 'true' || process.env['VERBOSE'] === 'true') {
+        console.log(`[HookRunner] shellConfig: ${JSON.stringify(shellConfig)}`);
+        console.log(`[HookRunner] command: ${command}`);
+        console.log(`[HookRunner] cwd: ${input.cwd}`);
+      }
+
       // Set up environment variables
       const env = {
         ...sanitizeEnvironment(process.env, this.config.sanitizationConfig),
@@ -333,6 +339,9 @@ export class HookRunner {
       });
 
       child.on('exit', (code, signal) => {
+        if (process.env['CI'] === 'true' || process.env['VERBOSE'] === 'true') {
+          console.log(`[HookRunner] Hook exit. code: ${code}, signal: ${signal}`);
+        }
       });
 
       // Handle process exit
@@ -340,6 +349,12 @@ export class HookRunner {
         clearTimeout(timeoutHandle);
         const duration = Date.now() - startTime;
 
+        if (process.env['CI'] === 'true' || process.env['VERBOSE'] === 'true') {
+          console.log(`[HookRunner] Hook closed. exitCode: ${exitCode}, duration: ${duration}ms`);
+          console.log(`[HookRunner] stdout: ${stdout}`);
+          console.log(`[HookRunner] stderr: ${stderr}`);
+        }
+
         if (timedOut) {
           resolve({
             hookConfig,
@@ -428,6 +443,9 @@ export class HookRunner {
     text: string,
     exitCode: number,
   ): HookOutput {
+    if (process.env['CI'] === 'true' || process.env['VERBOSE'] === 'true') {
+      console.log(`[HookRunner] convertPlainTextToHookOutput: exitCode=${exitCode}, text="${text}"`);
+    }
     if (exitCode === EXIT_CODE_SUCCESS) {
       // Success - treat as system message or additional context
       return {