Documents the git-sync prod incident where the plugin was inert despite `enabled: true`, because its CODE was missing from user/plugins/git-sync/ while its CONFIG survived in the per-host env tree. Fix: GPM reinstall (make remote-gpm-install-prod PKG=git-sync) + clearcache. Captures the diagnostic (ls the plugin dir before touching config) and the remote-only plugin caveat (not in plugins.txt, not restored by the standard flows). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Np4cMQLF77i664CAQXySzU