Bug: anthropic-skills:docx hangs silently on Windows 11 (Write permission denied)

Summary

The anthropic-skills:docx skill hangs indefinitely without any error message on Windows 11. The root cause is that the skill's internal agent cannot write to its own working directory inside the skills-plugin folder.

Environment

• OS: Windows 11 Pro
• Claude Code version: latest
• Skill: anthropic-skills:docx

Steps to Reproduce

1. Invoke the anthropic-skills:docx skill to create a new .docx file
2. Observe that the skill launches but produces no output
3. After a long wait (~3 min), the skill times out silently or returns with no result

Expected Behavior

The skill creates the requested .docx file and returns a success message.

Actual Behavior

The skill hangs indefinitely. When the background agent finally completes, it reports:

The Write tool was rejected, so the script cannot be written to the skills directory.

The agent tries to write a JS file to:
C:\Users\<user>\AppData\Roaming\Claude\local-agent-mode-sessions\skills-plugin\<session-id>\<skill-id>\skills\docx\

This write is blocked by Claude Code's permission system, causing silent failure.

Impact

• Skill completely non-functional on Windows 11
• No error surfaced to user — just hangs silently
• Workaround: use python-docx directly via Bash tool

Additional Notes

Invoked multiple times (directly and via background agent) — all failed with the same root cause. The background agent's final output confirmed the Write permission issue.