Give it a task like "fix pagination without changing the public API". It takes a snapshot of your repository, narrows it down locally, and then lets Jev judge which of the remaining files and snippets are actually needed.
Your coding model then writes the code with only that context. Comes as an agent skill for Codex Desktop and Claude Code, plus a separate harness for the Codex command line, with benchmarks you can inspect.
Instructions in English and Japanese.
What you get
- Full Python source code, MIT licensed
- Agent skills for Codex Desktop and Claude Code
- Codex command-line harness and benchmarks






