fix: auto-truncate question option labels exceeding 30 characters

When AI generates AskUserQuestion tool calls with option labels longer
than 30 characters, opencode validation rejects them with "too_big" error.

This fix adds a pre-tool-use hook that automatically truncates labels
to 30 characters (with "..." suffix) before the validation occurs.

Fixes the error:
"The question tool was called with invalid arguments: expected string
to have <=30 characters"

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/index.ts

@@ -31,6 +31,7 @@ import {
   createStartWorkHook,
   createAtlasHook,
   createPrometheusMdOnlyHook,
+  createQuestionLabelTruncatorHook,
 } from "./hooks";
 import {
   contextCollector,
@@ -203,6 +204,8 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     ? createPrometheusMdOnlyHook(ctx)
     : null;
 
+  const questionLabelTruncator = createQuestionLabelTruncatorHook();
+
   const taskResumeInfo = createTaskResumeInfoHook();
 
   const backgroundManager = new BackgroundManager(ctx, pluginConfig.background_task);
@@ -484,6 +487,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     },
 
     "tool.execute.before": async (input, output) => {
+      await questionLabelTruncator["tool.execute.before"]?.(input, output);
       await claudeCodeHooks["tool.execute.before"](input, output);
       await nonInteractiveEnv?.["tool.execute.before"](input, output);
       await commentChecker?.["tool.execute.before"](input, output);