Pacenote
activeAn open-source Python framework for building coding agents. Pick your provider, pick your tools, pick your loop — then race whole agents against each other on the same task.
Pacenote
An open-source Python framework for building coding agents. Pick your provider, pick your tools, pick your loop, and it wires them together. Recreate SWE-Agent, Aider, Cline or Codex in a few lines each, or design something that doesn’t exist yet.
Shipping as
chimera-runon PyPI while the rename lands — the repository and package still carry the old name.
Why
Every coding agent is the same four parts: a provider, a set of tools, a reasoning loop, and an environment where code runs. Monoliths bolt those together and make each one impossible to swap. Decomposing them turns “what if this agent used a different loop?” into a one-line experiment instead of a fork of a 50,000-line repo.
What’s in it
- Seven sibling CLIs built from the same primitives, each with its own character
- 27 benchmark adapters and a grid runner — thirteen agents across seven benchmarks
- A TUI multiplexer that races N complete agents on one task, each in an isolated git worktree, with a live scoreboard
- Modal integration for fan-out: thousands of graded task attempts as concurrent cloud functions
- An honest harness — errored runs are not graded as passes