Neura Market
Oh My Openagent logo

Oh My Openagent

Free

omo; the best agent harness - previously oh-my-opencode

FreeFree tier
Type
Open Source
Visit Website GitHub (59.3k stars)

About Oh My Openagent

Oh My OpenAgent (formerly oh-my-opencode) is an open-source, battle-tested AI agent harness designed for autonomous codebase interaction and task execution. With over 66,400 GitHub stars and 3.4 million total downloads, it is production-proven. The system orchestrates 11 specialized agents using a sophisticated workflow: Sisyphus serves as the primary orchestrator with phases from intent parsing to independent verification; Prometheus acts as a strategic planner that never writes code; Atlas is the master executor that delegates to specialists; and Hephaestus performs deep architectural reasoning and complex debugging. It offers two editions: OpenCode Ultimate (full plugin with Team Mode, background tasks, 3-tier MCP, 60+ lifecycle hooks) and Codex CLI Light (8 components wired to Codex events). Key capabilities include auto-planning, deep research, self-correction loops, parallel agent execution, and session continuity through boulder.json. Team Mode allows up to 8 parallel agents working simultaneously with real-time messaging.

Key Features

11 specialized agents for different workflow roles
60+ lifecycle hooks for customization
Team Mode with up to 8 parallel agents and real-time messaging
Auto-planning, deep research, self-correction, and parallel execution
Two editions: OpenCode Ultimate and Codex CLI Light
Sisyphus orchestrator with intent parsing, codebase assessment, smart delegation, and independent verification
Prometheus strategic planner (never writes code) and Atlas master executor
Hephaestus deep worker for architectural reasoning and complex debugging
Session continuity with boulder.json – resume after interruptions
3-tier MCP (Model Context Protocol) support in OpenCode Ultimate

Pros & Cons

Pros
  • Battle-tested with 66.4k GitHub stars and 3.4M+ downloads
  • Zero-intervention mode: auto-plans, researches, corrects, and verifies
  • Session continuity survives power outages and system crashes
  • Team Mode allows true parallel agent collaboration
  • Highly customizable with lifecycle hooks and multiple editions
  • Open source and free to use
Cons
  • Requires access to specific proprietary LLMs (e.g., Claude Opus, GPT-5.6) which may incur usage costs
  • Setup and configuration may have a learning curve for new users
  • Dependency on external model APIs for full functionality
  • Team Mode is opt-in and may require additional system resources

Best For

Autonomous codebase refactoring and modificationComplex debugging and cross-domain synthesisArchitectural reasoning and planningLarge-scale parallel code generation and verificationAutomated research and documentation generationCode review and gap analysis

FAQ

What is Oh My OpenAgent?
Oh My OpenAgent is an open-source AI agent harness that orchestrates multiple specialized agents to autonomously plan, research, execute, and verify codebase tasks. It is production-proven with over 66,000 GitHub stars and millions of downloads.
What are the two editions available?
The two editions are OpenCode Ultimate (full plugin with 11 agents, Team Mode, background tasks, 3-tier MCP, and 60+ lifecycle hooks) and Codex CLI Light (8 components wired to Codex events). They share the same orchestration engine.
How does session continuity work?
Active work is tracked in a boulder.json file. If interrupted (e.g., power outage, system crash), the system resumes exactly where it left off without losing progress.
What is Team Mode?
Team Mode allows a lead agent to orchestrate a team of category-specialized agents running in parallel, communicating via dedicated tools (team_send_message, team_task_create). Up to 8 members can work simultaneously, visible in tmux.