Surface the metric ADR 0004 says matters — the critical security/logic
core, currently 95% — as a README badge, distinct from the
informational global `coverage` badge.
- scripts/critical-modules.txt: single source of truth for the core
module list. scripts/coverage.sh now reads it (instead of a hardcoded
string) and update-badges.yml reads the same file, so the badge and
the `critical` report cannot drift.
- update-badges.yml: a `core coverage` step reuses the unit-coverage
data (every core module is unit-tested, so unit-only is accurate for
it) and sed-updates the new badge, like the existing ones.
- README: `core coverage 95%` badge linking to ADR 0004 so a reader can
find out what "core" means.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NkwFXLFff9PYPy4wgVBJp9
didericis
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