v5.5.0

What's new

• Dev builds now carry a semver -dev pre-release suffix (e.g. 5.5.0-dev), stripped only at release time. /plugin reads the version at branch HEAD and ignores git tags, so this makes the distinction between a stable release and the rolling main branch visible downstream. Thanks to @Stashub for the suggestion (#16).
• User-gate hook docs standardized on .claude/settings.json for registration, and the writing-plans gate-detection check now recognizes hooks registered in any of the three Claude Code settings files Claude Code merges (settings.json, settings.local.json, and user-global ~/.claude/settings.json) — so it no longer nudges you to enable enforcement you already opted into elsewhere.
• Synced upstream contributor guidelines.