d2b2b3fb43
extensions/ext-toggle.ts: /ext lists ~/.pi/agent/extensions/ with active/disabled markers and toggles individual extensions by renaming between name.ts and name.ts.off (pi only auto-discovers *.ts). Calls ctx.reload() so the change takes effect without restarting pi. Subdirectory-style extensions (name/index.ts) are listed read-only in v1 — toggling a directory cleanly is more work than the rename trick is worth. install.sh: --uninstall now matches both *.ts and *.ts.off symlinks pointing into this repo, so a disabled extension is still cleaned up. README.md / AGENTS.md: Document ext-toggle alongside the others; AGENTS notes the API surface used (registerCommand, ui.select/confirm/notify, reload) and the rename-not-delete design decision.