metaharness

About

Scaffold your own focused AI agent harness — like ruflo, uniquely yours.

Proven at the cost-Pareto frontier. Same "evolve the harness" thesis, measured: the Darwin harness resolves real SWE-bench Lite issues at 34.0% single-trajectory ($0.005/inst) and 39.7% Best-of-3 ($0.015/inst) — conformant, official harness. Live Cost–Performance leaderboard · @metaharness/darwin.

Published as metaharness (the metaharness and harness CLIs). Earlier versions were published as create-agent-harness.

You'll be prompted for template, host, description. Out comes a complete npm package ready to npm publish.

--host selects which host adapter ships with your harness:

If you've been using ruflo and want…