Individual skill

prompt-optimizer

A/B test CLAUDE.md instruction changes against eval benchmarks. Capture baselines, test variants, compare results.

plugins/mycelium/skills/prompt-optimizer/SKILL.md

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Nov 6, 2026
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# Prompt Optimizer

Systematically improve Mycelium instructions through measurement. Adapted from n-trax.

## Commands

### `baseline` -- Capture current performance
1. Run `/mycelium:eval-runner run-split optimization` — record as optimization scores
2. Run `/mycelium:eval-runner run-split holdout` — record as holdout scores
3. Record both to `.claude/optimization/baseline.json`: timestamp, CLAUDE.md hash, optimization metrics, holdout metrics, overall and per-category metrics

### `test <variant>` -- Test a variant
1. Read variant from `.claude/optimization/variants/<variant>.md`
2. Apply the CLAUDE.md changes described