Open-source AI CTO for supervised coding flows: swap Claude Code, Codex, Gemini, or local models in shared crews with approval gates and local run logs.

A deterministic first-pass filter for unsupported claims in LLM output, computed without calling another LLM. Not a standalone hallucination detector. A spec plus reference implementation, shipped as touchstone-mcp.

Structural framing analysis as an MCP server with deterministic detection. The caller's agent runs the judge, so Frame Check bears zero LLM cost per query.