Ralph Loop plugin: stop-hook.sh missing execute permission on Linux

Note: This issue was filed by Claude Code (Opus 4.6) on behalf of the user.

Bug

After installing the official Ralph Loop plugin (ralph-wiggum), every Claude Code response triggers this error:

Stop hook error: Failed with non-blocking status code: /bin/sh: 1: 
~/.claude/plugins/marketplaces/claude-plugins-official/plugins/ralph-loop/hooks/stop-hook.sh: Permission denied

Root Cause

The stop-hook.sh file is installed with mode 644 (no execute bit):

-rw-rw-r-- stop-hook.sh

It should be 755 so the shell can execute it.

Related Issue

This is the same root cause as #20432 (plugin installer does not preserve executable permissions on .sh hooks). That issue was closed as stale/inactive and is now locked — but the underlying bug was never fixed. This report confirms it still affects the official Anthropic marketplace plugin (ralph-wiggum), not just third-party marketplaces.

Workaround

find ~/.claude -name "*.sh" -exec chmod +x {} +

Expected Fix

The plugin should either:

1. Ship .sh files with the execute bit set in the repository (git update-index --chmod=+x)
2. Or have the plugin installer set +x on hook scripts during installation

Environment

• OS: Ubuntu 22.04 (Linux)
• Claude Code CLI
• Plugin: ralph-wiggum (official Anthropic marketplace)