What it is
Prompt optimizer. Takes a target task and a candidate prompt, runs structured iteration cycles, returns an optimized prompt with variant analysis.
Functions as the build system for prompts: input is rough intent, output is a hardened prompt artifact. Used internally to harden Claude Code prompts before they go live in instruments.
Where it sits
FORGE is catalogued under Infrastructure & Platforms in the instrument registry. Instruments in this group share a concern and are frequently composed rather than used alone; the related entries below are the nearest ones.
This is a registry entry: a real instrument, documented here, without a public endpoint a stranger can open. Pages carrying source excerpts and measured results are marked as such in the catalog. If you want detail on this one specifically, ask about it directly.