perf-baseline-manager

Manage baseline storage and comparison.

Follow docs/perf-requirements.md as the canonical contract.

Required Rules

• One baseline JSON per version.
• Store under {state-dir}/perf/baselines/<version>.json.
• Record metrics + environment metadata.

Output Format

baseline_version: <version>
metrics: <summary>
file: <path>

Constraints

• Overwrite older baseline for the same version.
• Do not create multiple files for one version.