Oh-My-ClaudeCode (OMC) is a multi-agent orchestration layer for Claude Code, Anthropic's AI coding assistant. It extends Claude Code with a plugin system, custom MCP tools, a team collaboration engine, a real-time HUD, and a rich hook system. The system is implemented in TypeScript and runs as a CLI tool (`omc`), an npm package (`oh-my-claude-sisyphus`), and a Claude Code plugin. It manages autonomous coding pipelines (autopilot, ralph), multi-worker team sessions via tmux, skill learning and injection, and provides extensive tooling including LSP integration, AST analysis, Python REPL, and git-based checkpoints. Architecturally, OMC is a modular monolith with clear separation: a CLI entry point (Commander-based), a hook registry with ~20+ lifecycle hooks (session-end, pre-tool-use, persistent-mode, etc.), a team subsystem with state machines and tmux-based worker management, a HUD rendering engine, and a standalone MCP server exposing 33+ tools. The system integrates with multiple AI providers (Claude, Codex, Gemini, Grok, Cursor) and git hosting providers (GitHub, GitLab, Azure DevOps, Bitbucket, Gitea). External dependencies include `@anthropic-ai/claude-agent-sdk`, `@modelcontextprotocol/sdk`, `better-sqlite3`, `zod`, and `commander`. Key data flows include: user input → CLI or Claude Code hook → hook dispatcher → feature modules (autopilot, team, skills) → tool execution → state persistence (filesystem, SQLite). The system maintains extensive state on disk (`.omc/state/`, session transcripts, team events, skill files) and uses file-based locking for concurrency safety. The JEV shadow judgment system provides non-blocking evaluation of heuristic decisions against an external API for quality monitoring. The codebase demonstrates strong engineering practices: extensive test coverage (~3000+ tests), modular architecture with clear interfaces, atomic file operations, and security-conscious utilities (SSRF guard, token redaction, path traversal prevention). It is actively maintained with frequent releases and responsive issue triage.