CTX Fit

Judgement

What it is

Developer tool

What it does

A command line tool that tries several AI coding agent configurations against real tasks in your repository, picks the cheapest one that passes your tests reliably, and applies it as a reviewable change or pull request.

Adopt it when

You use a coding agent on a repository with a working test suite and want evidence for which setup to pay for.

Watch out

It runs paid coding agent sessions to compare setups, compares configurations within one agent only, and is built mainly around Claude Code.

Ready for

Experimental

Runs as

Command line

Built with

Python

How established

Young: started 7 months ago, latest release v1.0.21.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: CTX Fit → CPython → GCC → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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