# 0xDarkMatter

- **Event:** [Built with Opus 4.7: a Claude Code hackathon](https://cerebralvalley.ai/e/built-with-4-7-hackathon)
- **When:** Apr 21 at 12:00 PM – Apr 27 at 2:00 AM (EDT)
- **Where:** Online
- **Team:** [Mack Nevill](https://cerebralvalley.ai/u/0xDarkMatter)
- **GitHub:** https://github.com/0xDarkMatter/axiom
- **Demo video:** https://vimeo.com/1186756940
- **Gallery:** https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery/119

Axiom — autonomous software-engineering swarm that builds its own skills

Axiom is a swarm of nine specialised AI roles that solves Terminal-Bench 2.0 tasks by synthesising its own skill library through a learning-and-iteration loop. The Architect identifies useful abstractions per-task; the swarm synthesises them as loadable skills mid-execution; the Iterator refines weak skills across attempts; the Librarian indexes them via vector retrieval. 158 skills, all generated during the hackathon — but the durable contribution is the loop itself: point Axiom at any new benchmark or hard software task and it builds the skill library for that domain.

Result. Terminal-Bench 2.0 pass rate: 94.4% (awaiting official validation). 

The current public top is OpenAI's Codex on GPT-5.5 at 82.0%; Anthropic's own Claude Code sits at 58.0%.

Why Opus 4.7. The model stays on track over long-running agentic work. I wrote a detailed Axiom spec, fed it to Rookery, and the swarm built itself — headless agents in parallel git worktrees, dispatched and merged automatically. And the intelligence: 4.7 cracked Terminal-Bench tasks I'd previously been unable to solve myself.

The infrastructure. 
Building Axiom required three new primitives — all OSS, all written this week:
- Rookery — parallel-session runtime; the same tool that built Axiom now runs its experiments
- Raven — SQLite-backed message bus for live cross-session coordination
- Roost — OAuth load balancer across Max plans

https://github.com/0xDarkMatter/rookery
https://github.com/0xDarkMatter/raven
https://github.com/0xDarkMatter/roost

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Markdown version of https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery/119. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt