tachi

AI-reasoning threat modeling harness for Claude Code covering STRIDE, LLM, agentic, and OWASP frameworks.

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tachi is a free, open-source threat modeling harness for Claude Code that reasons over a system's architecture to catch logic-level security issues traditional SAST tools miss, with full coverage across five OWASP frameworks including LLM and Agentic Top 10s. One command dispatches 14 specialized threat-detection agents and produces SARIF findings, attack trees, and a PDF security report. It's aimed at security and development teams who want AI-reasoning threat modeling built into their Claude Code workflow.

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