Bug Description

OpenClaw's skills watcher (chokidar) does not ignore .venv/ and pycache/ directories by default, causing file descriptor exhaustion (FD leak) when skills contain Python virtual environments.

Symptoms

• spawn EBADF error when using exec tool
• Gateway becomes unresponsive
• FD count explodes to 17,000+

Root Cause

In dist/loader-BrK9xPUo.js, the DEFAULT_SKILLS_WATCH_IGNORED array only excludes:

const DEFAULT_SKILLS_WATCH_IGNORED = [
  /(^|[\/\])\.git([\/\]|$)/,
  /(^|[\/\])node_modules([\/\]|$)/,
  /(^|[\/\])dist([\/\]|$)/,
];

Missing patterns:

• .venv/ - Python venv (10,000+ files)
• pycache/ - Python cache
• browser_data/ - Browser cache

Impact

When a skill with Python venv is in workspace/skills/:

1. Chokidar watches ~11,000 files in .venv/
2. FD count hits 17,784 (exceeds ulimit 4,864)
3. child_process.spawn() fails with EBADF
4. Gateway exec tool broken

Suggested Fix

const DEFAULT_SKILLS_WATCH_IGNORED = [
  /(^|[\/\])\.git([\/\]|$)/,
  /(^|[\/\])node_modules([\/\]|$)/,
  /(^|[\/\])dist([\/\]|$)/,
  /(^|[\/\])\.venv([\/\]|$)/,
  /(^|[\/\])__pycache__([\/\]|$)/,
  /(^|[\/\])browser_data([\/\]|$)/,
];

Severity: High
Type: Bug