MyCoder is a CLI agent that leverages LLMs including Anthropic Claude, OpenAI GPT, and local Ollama models to autonomously implement features, fix bugs, and perform software engineering tasks. It uses a modular extensible tool system, can spawn parallel sub-agents for concurrent processing, and integrates with GitHub for issue and pull request workflows. The agent builds context from project files, README, and shell commands, supports the Model Context Protocol for external data sources, and automatically manages context window size through message compaction for long-running sessions.