CORAL

Installation

curl -fsSL https://raw.githubusercontent.com/Human-Agent-Society/CORAL/main/install.sh | sh

Installs coral globally via uv tool install. Pin a version with CORAL_VERSION=v0.5.0. See Installation docs for manual install, dev setup, and prerequisites.

coral init my-task                       # scaffold a task
cd my-task && coral start -c task.yaml   # launch agents

Supported Agents

| Agent | agents.runtime | |-------|------------------| | Claude Code — default | claude_code | | Codex | codex | | Cursor Agent | cursor | | Kiro | kiro | | OpenCode | opencode |

Each agent must be installed and authenticated separately. Per-runtime config — including the LiteLLM gateway for custom models — is documented at Agent Runtimes.

How It Works

Each agent runs in its own git worktree. Shared state (attempts, notes, skills) lives in .coral/public/ and is symlinked into every worktree — agents see each other's work in real time. A grader daemon scores every commit. The manager interrupts agents with heartbeat prompts (reflect, consolidate, pivot).

Deeper dive: Concepts · Multi-agent runs · Eval loop

Examples

Ready-to-run task configurations in examples/:

| Task | Domain | Description | | -------------------------- | ------------ | ----------------------------------------------------------- | | circle_packing | Optimization | Pack 26 circles into a unit square to maximize sum of radii | | erdos | Mathematics | Solve a math conjecture | | kernel_builder | Systems | VLIW SIMD kernel optimization | | kernel_engineering | Systems | GPU kernel optimization | | mnist | ML | Handwritten digit classification | | spaceship_titanic | ML | Kaggle competition | | stanford_covid_vaccine | Bio/ML | mRNA degradation prediction |

Full catalogue and walkthroughs at Examples docs.

Development

# Install dev dependencies
uv sync --extra dev

# Run tests
uv run pytest tests/ -v

# Lint & format
uv run ruff check .
uv run ruff format .

[!IMPORTANT] Docker requirement: Some built-in graders (e.g. SWE-bench, terminal-bench) use Harbor to run evaluations inside Docker containers. CORAL itself must not run inside Docker in this case, as Docker-in-Docker (DinD) is not supported. Run CORAL directly on the host machine.

This project is released under the Apache 2.0 LICENSE.

Citation

⭐ If you find CORAL useful, please consider giving us a Star and/or citing it in your work (Please use the official BibTeX below instead of Google Scholar’s auto-generated citation, which may truncate the author list):

@article{qu2026coral,
  title={CORAL: Towards Autonomous Multi-Agent Evolution for Open-Ended Discovery},
  author={Qu, Ao and Zheng, Han and Zhou, Zijian and Yan, Yihao and Tang, Yihong and Ong, Shao Yong and Hong, Fenglu and Zhou, Kaichen and Jiang, Chonghe and Kong, Minwei and Zhu, Jiacheng and Jiang, Xuan and Li, Sirui and Wu, Cathy and Low, Bryan Kian Hsiang and Zhao, Jinhua and Liang, Paul Pu},
  journal={arXiv preprint arXiv:2604.01658},
  year={2026}
}

Acknowledgement

We thank the TNT Accelerator for their generous support of various API credits that have helped during the development of Coral. We would also like to thank many of the inspiring prior works such as OpenEvolve, autoresearch, TTT Discover, etc., that have led to the ideation of Coral.