The Best Agent Harness

40.7k stars. 1.2M+ downloads. Battle-tested and production-proven.

40.7k GitHub Stars
10 Specialized Agents
1.2M+ Total Downloads
459.5k Monthly Downloads
40+ Lifecycle Hooks
$bunx oh-my-openagent install
The Magic Word

ulw

Type Three Letters. Walk Away.

Ultra Work mode triggers maximum precision: auto-planning, deep research, parallel agents, and self-correction loops. The system doesn't stop until it's done. You don't babysit.

Auto-PlanningDeep ResearchSelf-CorrectionParallel Agents

Zero intervention. Full autonomy. Just results.

sisyphus — -zsh — 80x24
~_
Scanning codebase...
Launching 3 explore agents...
Building execution plan...
Deploying 4 parallel agents...
Running verification suite...
Done. 847 lines changed, 0 issues.
~_
Primary OrchestratorClaude Opus 4.6 Max

Sisyphus

The CTO Who Never Sleeps

Named after the mythological figure rolling his boulder uphill forever. Sisyphus parses implicit requirements, adapts to your codebase's maturity, and delegates to specialists. Interrupted? The boulder system resumes exactly where you left off.

PHASE 1
Intent Gate

Parses what you meant, not just what you typed

PHASE 2
Codebase Assessment

Maps your architecture before touching a line

PHASE 3
Smart Delegation

Routes to the right specialist agent

PHASE 4
Independent Verification

Trusts nothing. Verifies everything.

Session Continuity

Active work tracked in boulder.json. Power outage? System crash? Doesn't matter. Pick up exactly where you stopped.

Orchestration Workflow

Think, Then Act

Planning and Execution Are Different Jobs

Claude Opus 4.6 Max
Prometheus
Strategic Planner

The architect. Interviews you, explores your codebase, and creates detailed battle plans. Never writes code. Uses Metis and Momus as quality gates.

  • Intelligent interview mode
  • Multi-agent codebase exploration
  • Gap analysis with Metis
  • Ruthless review with Momus
Claude Sonnet 4.6
Atlas
Master Executor

The builder. Reads verified plans, delegates to specialized agents via category+skills system. Tracks learnings across tasks. Verifies independently — never trusts subagent claims.

  • Intent-based task routing
  • Wisdom accumulation across tasks
  • Boulder session continuity
  • Independent result verification
1
Describe your work to Prometheus
2
Metis analyzes for gaps
3
Momus validates ruthlessly
4
Atlas delegates to specialists
5
Independent verification on everything

The planner doesn't code. The executor follows verified plans. Intelligence lives in the system, not individual agents.

Deep WorkerGPT 5.3 Codex Medium

Hephaestus

Give Him a Goal, Not a Recipe

Named after the Greek god of the forge. Methodical, thorough, obsessive. Fires 2-5 parallel explore agents before writing any code. Built for deep architectural reasoning, complex debugging, and cross-domain synthesis.

01

EXPLORE — Map the terrain

02

PLAN — Chart the course

03

DECIDE — Commit to the path

04

EXECUTE — Build with precision

05

VERIFY — Prove it works

For when good enough isn't.

Specialized Agents

Five built-in agents for common workflows. Plus a dynamic system that assembles custom agents on demand.

GPT 5.4 High
Oracle
Architecture Consultant

Complex debugging and architectural decisions. When the path forward isn't obvious.

MiniMax M2.5
Librarian
Docs & Code Search

Finds real GitHub examples and official docs. Evidence-based, with permalinks.

MiniMax M2.5
Explore
Codebase Grep

Blazing fast codebase search. Cheap, parallel, always background.

Claude Opus 4.6
Metis
Plan Consultant

Catches ambiguities in plans before they become production bugs.

GPT 5.4
Momus
Plan Reviewer

Ruthless validation. Only approves when the plan is bulletproof.

Assembled for the task at hand
Dynamic Agent
Matches your request to the right model, loads the necessary skills, and builds an agent in real-time.

Category Routing

visual-engineeringGemini 3.1 Pro
ultrabrainGPT 5.4
artistryGemini 3.1 Pro
quickClaude Haiku 4.5
deepGPT 5.3 Codex
writingKimi K2.5
gitClaude Haiku 4.5

Skill Injection

playwright
git-master
frontend-ui-ux
dev-browser

"The right model + right expertise, every time."

Built Different

Design decisions that actually matter.

Specialization

Each agent does one thing exceptionally well. No jacks of all trades.

Trust But Verify

Orchestrator runs independent verification on everything. Subagents don't get a free pass.

Wisdom Accumulation

Learnings from each task passed to all subsequent tasks. The system gets smarter as it works.

Model Optimization

Expensive models for planning and complex decisions. Cheap models for routine work. Maximum output per dollar.

Category System

Intent-based routing. Say what you need — ultrabrain, visual-engineering, quick — and the right model handles it.

Session Continuity

Boulder system: interrupted work resumes exactly where it stopped. Zero context loss.

What Devs Actually Say

It made me cancel my Cursor subscription. Unbelievable things are happening in the open source community.

Arthur Guiot

If Claude Code does in 7 days what a human does in 3 months, Sisyphus does it in 1 hour.

B, Quant Researcher

Knocked out 8000 eslint warnings with Oh My Opencode, just in a day.

Jacob Ferrari

use oh-my-openagent, you will never go back

d0t3ch

You guys should pull this into core and recruit him. Seriously. It's really, really, really good.

Henning Kilset

Oh My OpenCode Is Actually Insane

Darren Builds AI (YouTube)

Stop Writing Boilerplate

Install Oh My OpenAgent and let the agents handle it. Your first ulw command is 30 seconds away.

$bunx oh-my-openagent install