The Model Is Commodity. The Harness Is the Moat.
LangChain's Terminal Bench 2.0 proved something the AI coding community suspected: changing only the harness (not the model) improved accuracy from 52.8% to 66.5%. That's a jump from top 30 to top 5 on the benchmark. Same model, different orchestration.
Context flow, tool orchestration, decision-making logic — this is where the real engineering lives. And the builders who work on this frontier are gathering in Seoul on April 25.
OmOCon Seoul 2026
OmOCon (Oh-My-OpenAgent Conference) is not a corporate conference. It's a builder gathering organized by Sisyphus Labs, Hashed, and Manaflow (cmux.com, YC S24). The first edition ran in San Francisco. Seoul is the second.
Date: April 25 (Sat), 1-5 PM KST
Venue: Hashed 20F, 374 Gangnam-daero, Seoul
Register: luma.com/0c78q15u
The Projects
oh-my-openagent (omo) — 42K+ Stars
Created by code-yeongyu. Multi-model agent orchestration with a clear philosophy: "The model is smarter than you. Why are you doing everything yourself?"
The agent architecture:
- Sisyphus (Claude Opus 4.6 / Kimi K2.5): Main orchestrator — plans, delegates, pushes to completion
- Hephaestus (GPT-5.4): Autonomous deep worker — goal-based exploration and execution
- Prometheus (Claude Opus 4.6): Strategic planner — interview mode for scope definition
Type ulw (ultrawork) and the agents handle codebase exploration → pattern analysis → implementation → verification autonomously.
oh-my-claudecode (omc)
A Claude Code native plugin by Yeachan-Heo with 32 specialized agents spanning architecture, research, design, testing, and data science.
Pipeline: team-plan → team-prd → team-exec → team-verify → team-fix
Cost: ~$60/mo across Claude + Gemini + ChatGPT Pro plans combined.
claw-code — 177K Stars, World Record
The most striking project. 177,000+ GitHub stars in record time. But the shocking part: no human ever cloned and ran this code. AI agents (using omo/omx) wrote it themselves. Clean-room implementation, no proprietary source code used.
"The model is only part of the story. The harness — context flow, tool orchestration, decision-making — this is where real engineering lives. That layer should be open." — instructkr
cmux — The Terminal for Coding Agents
Built by Austin Wang and Lawrence Chen (Manaflow, YC S24). A Ghostty-based macOS terminal purpose-built for coding agents.
Key features:
- Notification Rings: Blue (waiting), green (done), yellow (warning), red (error)
- Built-in Browser: Split view, agent-scriptable
- Agent → Agent: Agents can spawn other agents via cmux CLI
- Vertical Tabs: Git branch, PR status, ports, notifications in sidebar
Mitchell Hashimoto (Ghostty creator) called cmux "a massive success story for libghostty." Austin Wang is flying from the US specifically for OmOCon Seoul.
Why This Matters
The AI coding agent landscape in 2026 shows a clear direction. Model performance competition has plateaued. Differentiation happens at the harness layer.
OmOCon Seoul matters because it shows this shift through actual code and live demos, not papers or blog posts. The chance to talk directly with builders who design agent architectures doesn't come often.
Register: https://luma.com/0c78q15u
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