MCP server giving Claude Code automated prompt optimization loops and regression test suites — iteratively improve a system prompt against a target answer, or validate it across a full test suite, alongside a web UI for entering queries, test cases, and system prompts.
1 file for Claude Code: prompt-lab-mcp CLAUDE.md — 3,552 tokens loaded in every session.
CLAUDE.md A 3,552 tok These files are jurek-f/prompt-lab-mcp's own configuration — they tell Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.