metrics.md

PR / build metrics

Status: not yet implemented. This file records the intent honestly and does not make it up. There is no metrics pipeline here today.

What already exists

• .github/green-criteria.yml tracks snapshots of the status of each criterion over time (status_<date> fields). This is the closest thing to a trend line TunaOS has right now — see docs/quality.md.
• .github/workflows/matrix-status.yml and weekly-boot-report.yml produce point-in-time build/boot reports.

What's missing

A real PR-acceptance metric (time-to-merge, revert rate, CI-failure rate by category) would need a script. That script would read the GitHub API on a schedule and write a report. None of that exists yet. If this becomes worth the work, model it on scripts/gen-matrix-status.py, which already does the equivalent aggregation for build status.