fix: make Cursor hooks transactional

src/plugins/cursor.ts

@@ -1,20 +1,18 @@
-import os from 'node:os';
-import path from 'node:path';
-import { resolvePrivateChildDirectory } from '../runtime-paths.js';
 import type { AgentPlugin, InstallConfig, PluginStatus } from './base.js';
 import {
   AGENT_KEY,
-  AUDIT_SCRIPT,
-  GUARD_SCRIPT,
   buildHandler,
   removeManagedHooks,
   renderDocument,
   runtimeContracts,
-  samePath,
 } from './cursor-contract.js';
+import {
+  commitCursorInstallation,
+  preflightCursorInstallation,
+  prepareCursorInstallation,
+} from './cursor-installation.js';
 import {
   readDocument,
-  requireRuntime,
   runtimeFilesExist,
   writeDocument,
 } from './cursor-io.js';
@@ -23,26 +21,29 @@ import { SUPPORTED_AGENTS } from './registry.js';
 const entry = SUPPORTED_AGENTS.get(AGENT_KEY)!;
 
 export const cursorPlugin: AgentPlugin = {
+  managesRuntime: true,
+
+  async preflightInstall(config: InstallConfig): Promise<void> {
+    await readDocument();
+    await preflightCursorInstallation(config);
+  },
+
   async install(config: InstallConfig): Promise<void> {
-    if (!config.agentId) throw new Error('agentId is required');
     const document = await readDocument();
-    const runtimeRoot = path.join(os.homedir(), '.elydora');
-    const agentDirectory = resolvePrivateChildDirectory(runtimeRoot, config.agentId);
-    const expectedGuard = path.join(agentDirectory, GUARD_SCRIPT);
-    const expectedAudit = path.join(agentDirectory, AUDIT_SCRIPT);
-    if (!samePath(config.guardScriptPath, expectedGuard)) {
-      throw new Error(`Elydora guard runtime must use the managed agent directory: ${expectedGuard}`);
-    }
-    if (!samePath(config.hookScriptPath, expectedAudit)) {
-      throw new Error(`Elydora audit runtime must use the managed agent directory: ${expectedAudit}`);
-    }
-    await requireRuntime(expectedGuard, 'Elydora guard runtime');
-    await requireRuntime(expectedAudit, 'Elydora audit runtime');
+    const paths = await preflightCursorInstallation(config);
 
     const hooks = removeManagedHooks(document.hooks);
-    hooks.preToolUse = [...(hooks.preToolUse ?? []), buildHandler(expectedGuard)];
-    hooks.postToolUse = [...(hooks.postToolUse ?? []), buildHandler(expectedAudit)];
-    await writeDocument(renderDocument(document, hooks));
+    hooks.preToolUse = [...(hooks.preToolUse ?? []), buildHandler(paths.guardPath)];
+    hooks.postToolUse = [...(hooks.postToolUse ?? []), buildHandler(paths.auditPath)];
+    hooks.postToolUseFailure = [
+      ...(hooks.postToolUseFailure ?? []),
+      buildHandler(paths.auditPath),
+    ];
+    const prepared = await prepareCursorInstallation(
+      config,
+      renderDocument(document, hooks),
+    );
+    await commitCursorInstallation(prepared);
     console.log(`  Cursor hooks: ${document.filePath}`);
   },