Contrastive Skill Refinement

Refine a skill or harness edit with measured behavior, not judgment alone. Before an edit lands, run candidate versions of the skill on the SAME probe task, compare deliverables blind, and compose the surviving edit. Every recorded lesson carries an evidence line naming the observed contrast. This skill only changes skill definitions; for application code changes use build-review-loop.

Pattern source: Harness² (google-research/harness2, Apache-2.0, arXiv:2610.14224) — the Propose–Probe–Compose loop and the evidence-required lesson format, ported to Hermes skill dirs. See references/harness2-adaptation.md for what was ported and what was not.

When to Use