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>

src/install-engine.cts

@@ -28,6 +28,7 @@ import runtimeArtifactInstallPlan = require('./runtime-artifact-install-plan.cjs
 import runtimeNamePolicy = require('./runtime-name-policy.cjs');
 import installProfiles = require('./install-profiles.cjs');
 import installerMigrations = require('./installer-migrations.cjs');
+import retiredArtifactCleanup = require('./retired-artifact-cleanup.cjs');
 import { posixNormalize } from './shell-command-projection.cjs';
 import { isPathConfined } from './external-descriptor-trust.cjs';
 import { ensureCommonJsMarker } from './commonjs-marker.cjs';
@@ -725,6 +726,11 @@ function installRuntimeArtifacts(
   resolveAttribution: ResolveAttribution = () => undefined,
   capabilityRegistry?: any,
 ): void {
+  // A removed descriptor kind is no longer visited by the layout loop, so it
+  // cannot prune its own previous output. Clean manifest-proven retired files
+  // before materializing the current layout (#2644).
+  retiredArtifactCleanup.pruneRetiredRuntimeArtifacts(runtime, configDir);
+
   // Combined-family runtimes (OpenCode/Kilo, ADR-1239 / #2087): route through
   // the dedicated combined commands+skills+plugin orchestrator instead of the
   // generic layout-driven loop below, mirroring the bespoke install path that
@@ -1304,6 +1310,12 @@ function installOpencodeFamilyArtifacts(
  * @param scope
  */
 function uninstallRuntimeArtifacts(runtime: string, configDir: string, scope: string): void {
+  // A retired descriptor kind is absent from the current uninstall plan, just
+  // as it is absent from the install plan. Sweep manifest-proven output from
+  // retired kinds before removing the current layout so a direct uninstall
+  // cannot leave stale runtime surfaces behind (#2644).
+  retiredArtifactCleanup.pruneRetiredRuntimeArtifacts(runtime, configDir);
+
   // Legacy cleanup before layout-driven removal (scope-aware to avoid
   // removing Claude local commands/gsd/ which is the primary install dir).
   // Returns saved user artifacts so we can migrate AFTER layout removal