feat(cursor): Enhance context injection and project registry management

- Updated `context-inject.sh` to refresh context before prompt submission and ensure worker is running.
- Added functionality to register and unregister projects for automatic context updates in `worker-service.ts`.
- Implemented methods to read and write the cursor project registry, allowing for better management of installed hooks.
- Integrated context updates into the `GeminiAgent`, `OpenRouterAgent`, and `SDKAgent` to ensure the latest context is available during sessions.

This update improves the integration of Claude-Mem with Cursor, ensuring that context is consistently updated and accessible across sessions.

cursor-hooks/CONTEXT-INJECTION.md

@@ -23,6 +23,35 @@ This:
 2. Creates `hooks.json` configuration
 3. Fetches existing context from claude-mem and writes to `.cursor/rules/claude-mem-context.mdc`
 
+### Context Updates at Three Points
+
+Context is refreshed **three times** per session for maximum freshness:
+
+1. **Before prompt submission** (`context-inject.sh`): Ensures you start with the latest context from previous sessions
+2. **After summary completes** (worker auto-update): Immediately after the summary is saved, worker updates the context file
+3. **After session ends** (`session-summary.sh`): Fallback update in case worker update was missed
+
+### Before Prompt Hook Updates Context
+
+When you submit a prompt, `context-inject.sh`:
+
+```bash
+# 1. Ensure worker is running
+ensure_worker_running "$worker_port"
+
+# 2. Fetch fresh context
+context=$(curl -s ".../api/context/inject?project=...")
+
+# 3. Write to rules file (used immediately by Cursor)
+cat > .cursor/rules/claude-mem-context.mdc << EOF
+---
+alwaysApply: true
+---
+# Memory Context
+${context}
+EOF
+```
+
 ### Stop Hook Updates Context
 
 After each session ends, `session-summary.sh`:
@@ -64,19 +93,41 @@ description: "Claude-mem context from past sessions (auto-updated)"
 
 ### Update Flow
 
-Context updates **after each session ends**:
-1. User has a conversation
-2. Agent completes (loop ends)
-3. `stop` hook runs `session-summary.sh`
-4. Summary generated + context file updated
-5. **Next session** sees the updated context
+Context updates at **three points**:
+
+**Before each prompt:**
+1. User submits a prompt
+2. `beforeSubmitPrompt` hook runs `context-inject.sh`
+3. Context file refreshed with latest observations from previous sessions
+4. Cursor reads the updated rules file
+
+**After summary completes (worker auto-update):**
+1. Summary is saved to database
+2. Worker checks if project is registered for Cursor
+3. If yes, immediately writes updated context file with new observations
+4. No hook involved - happens in the worker process
+
+**After session ends (fallback):**
+1. Agent completes (loop ends)
+2. `stop` hook runs `session-summary.sh`
+3. Context file updated (ensures nothing was missed)
+4. Ready for next session
+
+## Project Registry
+
+When you run `claude-mem cursor install`, the project is registered in `~/.claude-mem/cursor-projects.json`. This allows the worker to automatically update your context file whenever a new summary is generated - even if it happens from Claude Code or another IDE working on the same project.
+
+To see registered projects:
+```bash
+cat ~/.claude-mem/cursor-projects.json
+```
 
 ## Comparison with Claude Code
 
 | Feature | Claude Code | Cursor |
 |---------|-------------|--------|
 | Context injection | ✅ `additionalContext` in hook output | ✅ Auto-updated rules file |
-| Injection timing | Immediate (same prompt) | Next session (after stop hook) |
+| Injection timing | Immediate (same prompt) | Before prompt + after summary + after session |
 | Persistence | Session only | File-based (persists across restarts) |
 | Initial setup | Automatic | `claude-mem cursor install` creates initial context |
 | MCP tool access | ✅ Full support | ✅ Full support |
@@ -88,7 +139,9 @@ When you run `claude-mem cursor install`:
 - If worker is running with existing memory → initial context is generated
 - If no existing memory → placeholder file created
 
-After each session ends, context is updated for the next session.
+Context is then automatically refreshed:
+- Before each prompt (ensures latest observations are included)
+- After each session ends (captures new observations from the session)
 
 ## Additional Access Methods
 

cursor-hooks/context-inject.sh

@@ -1,9 +1,10 @@
 #!/bin/bash
 # Context Hook for Cursor (beforeSubmitPrompt)
-# Ensures worker is running before prompt submission
+# Ensures worker is running and refreshes context before prompt submission
 #
-# NOTE: Context is NOT updated here. Context updates happen in the stop hook
-# (session-summary.sh) after the session completes, so new observations are included.
+# Context is updated in BOTH places:
+# - Here (beforeSubmitPrompt): Fresh context at session start
+# - stop hook (session-summary.sh): Updated context after observations are made
 
 # Source common utilities
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
@@ -18,12 +19,50 @@ check_dependencies >/dev/null 2>&1 || true
 # Read JSON input from stdin
 input=$(read_json_input)
 
+# Extract workspace root
+workspace_root=$(json_get "$input" "workspace_roots[0]" "")
+if is_empty "$workspace_root"; then
+  workspace_root=$(pwd)
+fi
+
+# Get project name
+project_name=$(get_project_name "$workspace_root")
+
 # Get worker port from settings
 worker_port=$(get_worker_port)
 
 # Ensure worker is running (with retries)
 # This primes the worker before the session starts
-ensure_worker_running "$worker_port" >/dev/null 2>&1 || true
+if ensure_worker_running "$worker_port" >/dev/null 2>&1; then
+  # Refresh context file with latest observations
+  project_encoded=$(url_encode "$project_name")
+  context=$(curl -s -f "http://127.0.0.1:${worker_port}/api/context/inject?project=${project_encoded}" 2>/dev/null || echo "")
+  
+  if [ -n "$context" ]; then
+    rules_dir="${workspace_root}/.cursor/rules"
+    rules_file="${rules_dir}/claude-mem-context.mdc"
+    
+    # Create rules directory if it doesn't exist
+    mkdir -p "$rules_dir" 2>/dev/null || true
+    
+    # Write context as a Cursor rule with alwaysApply: true
+    cat > "$rules_file" 2>/dev/null << EOF
+---
+alwaysApply: true
+description: "Claude-mem context from past sessions (auto-updated)"
+---
+
+# Memory Context from Past Sessions
+
+The following context is from claude-mem, a persistent memory system that tracks your coding sessions.
+
+${context}
+
+---
+*Updated after last session. Use claude-mem's MCP search tools for more detailed queries.*
+EOF
+  fi
+fi
 
 # Allow prompt to continue
 echo '{"continue": true}'

src/services/worker-service.ts

@@ -30,6 +30,7 @@ const BUILT_IN_VERSION = typeof __DEFAULT_PACKAGE_VERSION__ !== 'undefined'
 // PID file management for self-spawn pattern
 const DATA_DIR = path.join(homedir(), '.claude-mem');
 const PID_FILE = path.join(DATA_DIR, 'worker.pid');
+const CURSOR_REGISTRY_FILE = path.join(DATA_DIR, 'cursor-projects.json');
 const HOOK_RESPONSE = '{"continue": true, "suppressOutput": true}';
 
 interface PidInfo {
@@ -62,6 +63,100 @@ function removePidFile(): void {
   }
 }
 
+// ============================================================================
+// Cursor Project Registry
+// Tracks which projects have Cursor hooks installed for auto-context updates
+// ============================================================================
+
+interface CursorProjectRegistry {
+  [projectName: string]: {
+    workspacePath: string;
+    installedAt: string;
+  };
+}
+
+function readCursorRegistry(): CursorProjectRegistry {
+  try {
+    if (!existsSync(CURSOR_REGISTRY_FILE)) return {};
+    return JSON.parse(readFileSync(CURSOR_REGISTRY_FILE, 'utf-8'));
+  } catch {
+    return {};
+  }
+}
+
+function writeCursorRegistry(registry: CursorProjectRegistry): void {
+  mkdirSync(DATA_DIR, { recursive: true });
+  writeFileSync(CURSOR_REGISTRY_FILE, JSON.stringify(registry, null, 2));
+}
+
+function registerCursorProject(projectName: string, workspacePath: string): void {
+  const registry = readCursorRegistry();
+  registry[projectName] = {
+    workspacePath,
+    installedAt: new Date().toISOString()
+  };
+  writeCursorRegistry(registry);
+  logger.info('CURSOR', 'Registered project for auto-context updates', { projectName, workspacePath });
+}
+
+function unregisterCursorProject(projectName: string): void {
+  const registry = readCursorRegistry();
+  if (registry[projectName]) {
+    delete registry[projectName];
+    writeCursorRegistry(registry);
+    logger.info('CURSOR', 'Unregistered project', { projectName });
+  }
+}
+
+/**
+ * Update Cursor context files for all registered projects matching this project name.
+ * Called by SDK agents after saving a summary.
+ */
+export async function updateCursorContextForProject(projectName: string, port: number): Promise<void> {
+  const registry = readCursorRegistry();
+  const entry = registry[projectName];
+  
+  if (!entry) return; // Project doesn't have Cursor hooks installed
+  
+  try {
+    // Fetch fresh context from worker
+    const response = await fetch(
+      `http://127.0.0.1:${port}/api/context/inject?project=${encodeURIComponent(projectName)}`
+    );
+    
+    if (!response.ok) return;
+    
+    const context = await response.text();
+    if (!context || !context.trim()) return;
+    
+    // Write to the project's Cursor rules file
+    const rulesDir = path.join(entry.workspacePath, '.cursor', 'rules');
+    const rulesFile = path.join(rulesDir, 'claude-mem-context.mdc');
+    
+    mkdirSync(rulesDir, { recursive: true });
+    
+    const content = `---
+alwaysApply: true
+description: "Claude-mem context from past sessions (auto-updated)"
+---
+
+# Memory Context from Past Sessions
+
+The following context is from claude-mem, a persistent memory system that tracks your coding sessions.
+
+${context}
+
+---
+*Updated after last session. Use claude-mem's MCP search tools for more detailed queries.*
+`;
+    
+    writeFileSync(rulesFile, content);
+    logger.debug('CURSOR', 'Updated context file', { projectName, rulesFile });
+  } catch (error) {
+    logger.warn('CURSOR', 'Failed to update context file', { projectName, error: (error as Error).message });
+  }
+}
+
 // No lock file needed - health checks and port binding provide coordination
 
 /**
@@ -1205,6 +1300,10 @@ Use claude-mem's MCP search tools for manual memory queries.
         writeFileSync(rulesFile, placeholderContent);
         console.log(`  ✓ Created placeholder context file (will populate after first session)`);
       }
+      
+      // Register project for automatic context updates after summaries
+      registerCursorProject(projectName, workspaceRoot);
+      console.log(`  ✓ Registered for auto-context updates`);
     }
     
     console.log(`
@@ -1285,13 +1384,18 @@ function uninstallCursorHooks(target: string): number {
       console.log(`  ✓ Removed hooks.json`);
     }
     
-    // Remove context file if project-level
+    // Remove context file and unregister if project-level
     if (target === 'project') {
       const contextFile = path.join(targetDir, 'rules', 'claude-mem-context.mdc');
       if (existsSync(contextFile)) {
         unlinkSync(contextFile);
         console.log(`  ✓ Removed context file`);
       }
+      
+      // Unregister from auto-context updates
+      const projectName = path.basename(process.cwd());
+      unregisterCursorProject(projectName);
+      console.log(`  ✓ Unregistered from auto-context updates`);
     }
     
     console.log(`\n✅ Uninstallation complete!\n`);

src/services/worker/GeminiAgent.ts

@@ -20,6 +20,8 @@ import { buildInitPrompt, buildObservationPrompt, buildSummaryPrompt, buildConti
 import { SettingsDefaultsManager } from '../../shared/SettingsDefaultsManager.js';
 import type { ActiveSession, ConversationMessage } from '../worker-types.js';
 import { ModeManager } from '../domain/ModeManager.js';
+import { updateCursorContextForProject } from '../worker-service.js';
+import { getWorkerPort } from '../../shared/worker-utils.js';
 
 // Gemini API endpoint
 const GEMINI_API_URL = 'https://generativelanguage.googleapis.com/v1beta/models';
@@ -493,6 +495,9 @@ export class GeminiAgent {
           }
         });
       }
+      
+      // Update Cursor context file for registered projects (fire-and-forget)
+      updateCursorContextForProject(session.project, getWorkerPort()).catch(() => {});
     }
 
     // Mark messages as processed

src/services/worker/OpenRouterAgent.ts

@@ -20,6 +20,8 @@ import { SettingsDefaultsManager } from '../../shared/SettingsDefaultsManager.js
 import { USER_SETTINGS_PATH } from '../../shared/paths.js';
 import type { ActiveSession, ConversationMessage } from '../worker-types.js';
 import { ModeManager } from '../domain/ModeManager.js';
+import { updateCursorContextForProject } from '../worker-service.js';
+import { getWorkerPort } from '../../shared/worker-utils.js';
 
 // OpenRouter API endpoint
 const OPENROUTER_API_URL = 'https://openrouter.ai/api/v1/chat/completions';
@@ -536,6 +538,9 @@ export class OpenRouterAgent {
           }
         });
       }
+      
+      // Update Cursor context file for registered projects (fire-and-forget)
+      updateCursorContextForProject(session.project, getWorkerPort()).catch(() => {});
     }
 
     // Mark messages as processed

src/services/worker/SDKAgent.ts

@@ -20,6 +20,8 @@ import { SettingsDefaultsManager } from '../../shared/SettingsDefaultsManager.js
 import { USER_SETTINGS_PATH } from '../../shared/paths.js';
 import type { ActiveSession, SDKUserMessage, PendingMessage } from '../worker-types.js';
 import { ModeManager } from '../domain/ModeManager.js';
+import { updateCursorContextForProject } from '../worker-service.js';
+import { getWorkerPort } from '../../shared/worker-utils.js';
 
 // Import Agent SDK (assumes it's installed)
 // @ts-ignore - Agent SDK types may not be available
@@ -474,6 +476,9 @@ export class SDKAgent {
           }
         });
       }
+      
+      // Update Cursor context file for registered projects (fire-and-forget)
+      updateCursorContextForProject(session.project, getWorkerPort()).catch(() => {});
     }
 
     // Mark messages as processed after successful observation/summary storage