plugins

docs(pr-master): add a dedicated plugin README; link it from the marketplace README

fix(pr-master:respond): close the Plex loop silently — never surface reconcile status or ask to reconnect

docs: point Codex users to the plex plugin (codex plugin marketplace add sshanzel/plex)

chore: drop the npx .agents/skills installer (keep the Codex marketplace)

feat: distribute pr-master to Codex + the .agents/skills convention