README.md

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title: README
emoji: 🔥
colorFrom: red
colorTo: yellow
sdk: static
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OpenVulcan

Open tools that let AI coding agents work fast without breaking things.

Website · GitHub

vulcan-decision-shell-v1

Small dedicated models that judge an AI coding agent's tool call before it runs: allow, review or block. Three sizes share one policy, one input format and the same three decisions.

Model	Size	Good for
vulcan-decision-shell-v1	0.75B	Best quality
vulcan-decision-shell-v1-flash	0.36B	Close to v1, faster
vulcan-decision-shell-v1-mini	0.2B	Machines short on memory or compute

• vulcan-decision-shell-v1-runtime: ONNX packages of all three for CUDA, WebGPU and CPU
• vulcan-decision-shell-v1-data: training and validation banks

Use it

• Vulcan Decision Guard: permission guard plugins for Claude Code and Codex. Every tool call is judged locally on ONNX or through OpenVulcan Cloud before it runs, and nothing is allowed when the judge cannot answer.
• VulcanCode: our coding and work platform uses these models for automatic approval.

The cloud decision model is free, permanently.

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OpenVulcan 为 AI 编码代理做开放工具：vulcan-decision-shell-v1 系列在工具调用执行前判定放行、复核或拦下， 三个尺寸同一套策略；Vulcan Decision Guard 把它接入 Claude Code 与 Codex。 云端判定模型永久免费。