# Technical Specification - O1

**Version**: v1.0.0 | **Status**: Active | **Last Updated**: February 2026

**Module**: `codomyrmex.agents.o1`  
**Last Updated**: 2026-01-29

## 1. Purpose

OpenAI o1/o3 reasoning model integration for advanced multi-step reasoning tasks

## 2. Architecture

### 2.1 Components

```
o1/
├── __init__.py          # Module exports
├── README.md            # Documentation
├── AGENTS.md            # Agent guidelines
├── SPEC.md              # This file
├── PAI.md               # Personal AI context
└── core.py              # Core implementation
```

### 2.2 Dependencies

- Python 3.10+
- Parent module: `agents`

## 3. Interfaces

### 3.1 Public API

```python
# Primary exports from codomyrmex.agents.o1
from codomyrmex.agents.o1 import (
    O1Client,              # OpenAI o1/o3 reasoning model client
)

# Key class signatures:
class O1Client(APIAgentBase):
    def __init__(self, config: dict[str, Any] | None = None): ...
    def _execute_impl(self, request: AgentRequest) -> AgentResponse: ...
    def _stream_impl(self, request: AgentRequest) -> Iterator[str]: ...
    def _build_messages(self, request: AgentRequest) -> list[dict[str, str]]: ...
```

### 3.2 Configuration

Environment variables:
- `CODOMYRMEX_*`: Configuration options

## 4. Implementation Notes

### 4.1 Design Decisions

1. **OpenAI-compatible base**: Extends `APIAgentBase` to share connection management, retry logic, and token extraction with other OpenAI-compatible providers.
2. **Developer-role system prompts**: o1 models treat system prompts as `developer` role messages instead of the standard `system` role, handled transparently in `_build_messages`.
3. **`max_completion_tokens` instead of `max_tokens`**: o1 models use a distinct parameter for output token limits, mapped automatically by the client.

### 4.2 Limitations

- o1 models may not support streaming in all configurations; `_stream_impl` is provided but behavior depends on the API version
- Temperature is accepted but may be ignored by the o1 reasoning engine

## 5. Testing

```bash
# Run tests for this module
uv run pytest src/codomyrmex/tests/unit/agents/o1/
```

## 6. Future Considerations

- Support for o1-pro and o3 model variants as they become available
- Structured output / tool-use integration for reasoning chains

## Navigation

- **Self**: `SPEC.md`
- **Parent**: [../README.md](../README.md)
- **Readme**: [README.md](README.md)
- **Agents**: [AGENTS.md](AGENTS.md)
- **Repository Root**: [README.md](../../../../README.md)
