Fix: Add error handling to hook entry points to prevent startup hang

[Copilot]

Claude Code hangs on startup after plugin installation when hooks encounter errors (worker not ready, first-time setup, connection failures). Root cause: uncaught promise rejections in hook entry points leave processes hanging instead of exiting cleanly.

Changes

Hook Entry Points - Added error handlers to all lifecycle hooks:

• context-hook.ts - .catch() handler for TTY path, try-catch for stdin path
• new-hook.ts, save-hook.ts, summary-hook.ts - try-catch wrappers in stdin handlers
• cleanup-hook.ts - .catch() for TTY path, try-catch for stdin path

All error paths now log to stderr and exit with code 1.

Before/After

Before:

stdin.on('end', async () => {
  const parsed = input.trim() ? JSON.parse(input) : undefined;
  const text = await contextHook(parsed);  // Uncaught rejection → hang
  console.log(JSON.stringify({hookSpecificOutput: {...}}));
  process.exit(0);
});

After:

stdin.on('end', async () => {
  try {
    const parsed = input.trim() ? JSON.parse(input) : undefined;
    const text = await contextHook(parsed);
    console.log(JSON.stringify({hookSpecificOutput: {...}}));
    process.exit(0);
  } catch (error: any) {
    console.error(error.message || String(error));
    process.exit(1);  // Clean exit instead of hang
  }
});

Hooks now fail gracefully with error messages instead of causing Claude Code to freeze during startup.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Can't open claude code when I install this plugin</issue_title>
<issue_description>Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Install plugin
2. Exit claude code
3. Open a new claude code
4. Stuck

Expected behavior
A clear and concise description of what you expected to happen.
I can use claude code nomally.
Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS] Macos
• Browser [e.g. chrome, safari] terminal
• Version [e.g. 22] 26

Smartphone (please complete the following information):

• Device: [e.g. iPhone6] Macbook air m4
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Can't open claude code when I install this plugin #303

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