brent.edwards 4629c44fc0 perf(tests): optimize coverage instrumentation and reporting pipeline ...

Replace coverage.py (sys.settrace-based) with slipcover (bytecode-based
instrumentation) for significantly faster coverage collection:

- Each behave-parallel worker runs under slipcover, producing per-feature
  JSON coverage files with unique UUIDs to avoid write contention.
- After all workers finish, slipcover --merge combines per-worker data
  into a single build/coverage.json report.
- XML report generated via slipcover --merge --xml for CI tooling.
- Terminal report with --fail-under=97 threshold enforcement.
- Robust JSON key-fallback logic handles both slipcover ('summary') and
  coverage.py ('totals') output formats.

CI workflow fixes:
- ci.yml 'Surface coverage summary' step uses defensive key lookup
  instead of hardcoded ['totals']['percent_covered'].
- nightly-quality.yml applies same fallback pattern.

Documentation updated to reflect slipcover as the coverage tool.

Part of #478. Closes #482.

2026-03-01 02:57:36 +00:00

..

ci-cd.md

feat(ci): add nox-based PR validation workflow

2026-02-12 22:01:51 +00:00

quality-automation.md

feat(qa): align security scans with nox

2026-02-13 19:24:24 +00:00

review_playbook.md

docs(qa): add review playbook and priority matrix

2026-02-19 22:00:53 +00:00

scale_testing.md

test(perf): add scale test fixtures

2026-02-20 03:31:43 +00:00

testing.md

perf(tests): optimize coverage instrumentation and reporting pipeline

2026-03-01 02:57:36 +00:00