Add native Codex hooks integration (#2319)

* Add native Codex hooks integration

* Address Codex review feedback

* Use durable Codex marketplace root

* Address Codex file context review feedback

* Harden Codex installer review paths

* Report Codex legacy cleanup failures

* fix: keep MCP manifests in marketplace sync

* fix: bundle zod in MCP server

* fix: warn on Codex legacy cleanup failure

* Fix hook observation readiness timeouts

* Address Codex hook review notes

* Tighten Codex MCP file context matching

* Resolve final Codex review nits

* Add Codex marketplace version guidance

* Reset worker failure counter on API fallback

* Fix Codex cat flag file extraction

plugin/scripts/version-check.js

@@ -19,18 +19,31 @@ function resolveRoot() {
 const ROOT = resolveRoot();
 if (!ROOT) process.exit(0);
 
+function emitUpgradeHint(message) {
+  if (process.env.CLAUDE_MEM_CODEX_HOOK === '1') {
+    console.log(JSON.stringify({
+      hookSpecificOutput: {
+        hookEventName: 'SessionStart',
+        additionalContext: message,
+      },
+    }));
+  } else {
+    console.error(message);
+  }
+}
+
 try {
   const pkg = JSON.parse(readFileSync(join(ROOT, 'package.json'), 'utf-8'));
   const markerPath = join(ROOT, '.install-version');
   if (!existsSync(markerPath)) {
-    console.error('claude-mem: runtime not yet set up — run: npx claude-mem repair');
+    emitUpgradeHint('claude-mem: runtime not yet set up - run: npx claude-mem@latest install');
     process.exit(0);
   }
   const marker = JSON.parse(readFileSync(markerPath, 'utf-8'));
   if (marker.version !== pkg.version) {
-    console.error(`claude-mem: upgraded to v${pkg.version} — run: npx claude-mem repair`);
+    emitUpgradeHint(`claude-mem: upgraded to v${pkg.version} - run: npx claude-mem@latest install`);
   }
 } catch {
-  console.error('claude-mem: install marker unreadable — run: npx claude-mem repair');
+  emitUpgradeHint('claude-mem: install marker unreadable - run: npx claude-mem@latest install');
 }
 process.exit(0);