# ADR-0003 Baseline metrics

## Context
Refactor progress needs a fixed baseline.

## Decision
Record repository baseline metrics as build output.

See `tools/validate_calibration_registry_v1.py` and `spec/08_scoring_rules.yaml` for baseline-linked validation context.

## Alternatives
- Report metrics manually in review notes

## Consequences
- Delta tracking becomes deterministic

## Rollback
Regenerate from a prior commit if needed.

## Affected files
- Temp/refactor_baseline_metrics_v1.json
- tools/validate_calibration_registry_v1.py
- spec/08_scoring_rules.yaml
