# Steps Taken to Date

## Project Setup

### 1. Initial Repository Structure
- Created monorepo with multiple projects
- Set up `crow/` as the main agent framework
- Set up `crow_ide/` as the frontend IDE
- Set up `OpenHands-CLI/` as reference ACP implementation

### 2. Dependencies
- Added OpenHands SDK as dependency
- Added ACP Python SDK (`acp` package)
- Configured LLM (Anthropic via custom endpoint)
- Set up tool specs (terminal, file_editor)

## ACP Server Implementation

### 3. Basic ACP Server
Created `crow/src/crow/agent/acp_server.py`:
- Implemented `CrowAcpAgent` class
- Added `initialize()` method
- Added `new_session()` method
- Added `prompt()` method
- Added `cancel()` method
- Added `load_session()` method

### 4. OpenHands Integration
- Created OpenHands Agent instances
- Configured LLM with custom endpoint
- Set up tool system (terminal, file_editor)
- Integrated Conversation for state management

### 5. Streaming Updates
- Implemented token callback system
- Created async queue for updates
- Mapped OpenHands tokens to ACP updates
- Added background task for sending notifications

### 6. Session Persistence
- Added session saving to `~/.crow/sessions/`
- Implemented session loading
- Added conversation history replay

## Critical Bug Fix

### 7. Conversation Reuse Issue
**Problem:** Agent was creating a new Conversation for each prompt, losing all context.

**Root Cause:** Line 636 in `acp_server.py` was doing:
```python
session.pop("conversation", None)
```

This removed the Conversation from the session after every prompt.

**Fix:** Removed the line that popped the conversation. Now the Conversation persists across prompts:
```python
# Only pop temporary state
session.pop("cancelled_flag", None)
# Keep conversation for reuse!
```

**Verification:** Added logging to confirm:
- Message 1: `Creating NEW Conversation (ID: 123...)`
- Message 2: `Reusing existing Conversation: 123...`
- Message 3: `Reusing existing Conversation: 123...`

## Testing Infrastructure

### 8. Manual Test Script
Created `crow/test_acp_manual.py`:
- Tests initialize
- Tests session/new
- Tests session/prompt with streaming
- Validates response structure

### 9. Conversation Memory Test
Created `crow/test_conversation_memory.py`:
- Sends multiple prompts in same session
- Verifies Conversation object is reused
- Tests context retention across prompts

## Frontend Integration

### 10. Crow IDE
- Built React-based IDE frontend
- Added ACP WebSocket proxy
- Implemented session management UI
- Added file browser and terminal
- Integrated with crow ACP server

### 11. External Agent IDs
- Added "crow" and "crow-agent" to ExternalAgentId type
- Updated AGENT_CONFIG in state.ts
- Fixed frontend crash when connecting to crow

## Current Status

### Working Features
✅ ACP server initialization
✅ Session creation and management
✅ Prompt handling with streaming
✅ Tool execution (terminal, file_editor)
✅ Conversation state persistence across prompts
✅ Session persistence to disk
✅ Cancellation support
✅ Frontend integration

### Known Limitations
⚠️ No context condenser (conversation grows unbounded)
⚠️ MCP integration not fully tested
⚠️ Limited error recovery
⚠️ No rate limiting
⚠️ No conversation summarization

## Next Steps

### Immediate Priorities
1. **Add Context Condenser** - Implement conversation summarization to prevent unbounded growth
2. **MCP Testing** - Verify MCP server integration works correctly
3. **Error Handling** - Improve error recovery and user feedback
4. **Performance** - Optimize streaming and reduce latency

### Future Enhancements
- Multi-session support
- Session sharing between clients
- Advanced permission controls
- Conversation export/import
- Tool result caching
- Parallel tool execution
- Custom visualizers
- Metrics and observability

## Technical Debt

### Code Quality
- Add more comprehensive error handling
- Improve type hints
- Add docstrings to all methods
- Reduce code duplication

### Testing
- Add unit tests for ACP methods
- Add integration tests for full flows
- Add stress tests for concurrent sessions
- Add tests for error scenarios

### Documentation
- Complete API documentation
- Add architecture diagrams
- Write troubleshooting guide
- Document configuration options

## Lessons Learned

### 1. Conversation Reuse is Critical
The most important design pattern is reusing the Conversation object. Without this, the agent has no memory across prompts.

### 2. Async/Sync Bridge is Tricky
Bridging async ACP to sync OpenHands SDK requires careful thread management. Use `run_in_executor` and `run_coroutine_threadsafe`.

### 3. Streaming Requires Queues
Token callbacks happen in worker threads. Use async queues to bridge to the main event loop for sending notifications.

### 4. Session State Management
Be very careful about what you store in sessions and what you clean up. Don't pop the conversation!

### 5. Testing is Essential
ACP servers are complex. Test with real clients, not just unit tests. Use subprocess tests to verify stdio communication.

## References

- [ACP Specification](https://agentclientprotocol.com)
- [OpenHands SDK](https://github.com/OpenHands/software-agent-sdk)
- [OpenHands-CLI](https://github.com/OpenHands/OpenHands-CLI) - Reference ACP implementation
- [Crow IDE](../crow_ide/) - Frontend client
