CompletionKit is a prompt testing platform that runs as a Rails engine or a standalone app. Run prompts against real datasets, score every output with an LLM judge against criteria you define, track prompt versions, and get AI-generated improvement suggestions grounded in your actual results. Includes a web UI, REST API, and a built-in MCP server with 34 tools.

Required Ruby Version

>= 3.2.0

Authors

Damien Bastin

Versions

  1. 0.28.38 August 05, 2026 (284 KB)
  2. 0.28.37 August 05, 2026 (284 KB)
  3. 0.28.36 August 05, 2026 (285 KB)
  4. 0.28.35 August 05, 2026 (285 KB)
  5. 0.28.34 August 05, 2026 (284 KB)
  6. 0.28.32 August 03, 2026 (284 KB)
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