fix(#2644): deduplicate Cursor slash menu (#2812)

* fix(#2644): deduplicate Cursor slash menu

* fix: preserve installer executable mode

* chore: add changeset for PR #2812

* test(#2644): acknowledge Cursor emission changes

* test(#2644): drop spent emitted drift acknowledgments

* fix(#2644): remove retired Cursor command converter

---------

Co-authored-by: clezcoding <clezcoding@users.noreply.github.com>
Co-authored-by: Tom Boucher <trekkie@nomorestars.com>

docs/installer-migrations.md

@@ -505,6 +505,7 @@ Each row corresponds to one migration record in `src/installer-migrations/`.
 | `2026-07-17-opencode-baseline-commands-dir` | `005-opencode-baseline-commands-dir.cts` | 1.7.0 | global, local | No | Baselines pre-existing files under OpenCode's `commands/` (plural) directory during the first-time scan. #2329 moved OpenCode command materialization to `commands/`, but 000's `RUNTIME_SURFACES.opencode` is a shipped, immutable body that still only names the legacy `command/` alias, so this fix-forward migration widens the scanned surface. OpenCode only; Kilo is unaffected. |
 | `2026-07-20-pi-extension-cjs-to-js` | `006-pi-extension-cjs-to-js.cts` | 1.7.1 | global, local | Yes | Removes the stale `extensions/gsd.cjs` left by pre-#2470 pi installs. pi's extension auto-discovery (`isExtensionFile()`) accepts only `.ts`/`.js`, so the `.cjs` file was never loaded and `/gsd` never registered; #2470 renamed the installed artifact to `extensions/gsd.js`, orphaning the old path. Locally modified copies are backed up rather than deleted; an unmanifested `gsd.cjs` is preserved as a user file. pi only. |
 | `2026-07-28-retire-config-root-commonjs-marker` | `007-retire-config-root-commonjs-marker.cts` | 1.8.0 | global, local | Yes | Removes `<configRoot>/package.json` when it is exactly the `{"type":"commonjs"}` marker pre-#2544 installs wrote there. #2544 moved that marker into the directories GSD fills (`hooks/`, and the native plugin dir), so an upgraded install would otherwise keep both and stay pinned to CommonJS at a config root GSD no longer writes. Ownership is proven by exact content match, not the manifest (the marker was never manifest-recorded) — a `package.json` with any other content is left untouched, with no backup-and-remove branch. All runtimes; kimi's root marker lives outside `configDir` and is retired by the installer instead. |
+| `2026-07-29-cursor-retire-commands-surface` | `008-cursor-retire-commands-surface.cts` | 1.8.1 | global, local | Yes | Removes manifest-managed `commands/gsd-*.md` files from Cursor installs. Cursor already exposes the corresponding skills in the slash menu and to contextual model invocation, so the command copies produced duplicate entries (#2644). Modified files are backed up; unmanifested files are preserved. |
 
 ## Prior Art