[Copilot]

Summary

Coverage now runs as part of the release workflow when a release-please PR is opened or updated, in addition to the existing post-merge coverage in build-release-evidence.

Changes to .github/workflows/release.yml:

• Added pull_request trigger (targeting main, types: opened, synchronize, reopened) alongside the existing push trigger
• Added if: github.event_name == 'push' guard to the release-please job so it only fires on pushes — downstream jobs (build-release-evidence, build-documentation, deploy-documentation) are naturally skipped on PR events via needs propagation
• New release-coverage job runs only when github.event_name == 'pull_request' && startsWith(github.head_ref, 'release-please--'): installs deps, runs pytest with coverage (80% threshold), uploads to Codecov, posts a coverage comment on the PR, and uploads artifacts — mirroring the existing coverage.yml approach

Why

The coverage.yml workflow only triggers on changes to packages/core/src/** or packages/core/tests/**. Release-please PRs only touch changelogs, version files, and manifests, so coverage never ran during the release lifecycle. This meant coverage info in the README could go stale without a code change to force a refresh.

Validation

• python -m ruff check .
• python -m ruff format --check .
• python -m pytest
• python -m build --sdist --wheel
• Not applicable — workflow-only change; YAML syntax validated; no secrets detected

Documentation

• No documentation update was needed.

Scope

• This pull request is focused on one feature or fix.
• Tests were added or updated for functional changes.
• Assumptions, risks, or follow-up work are described below.

Risks or follow-up

• The release-coverage job uses github.head_ref to detect release-please branches (release-please--**). This assumes release-please follows its standard branch naming convention.
• Coverage threshold is hardcoded at 80% (matching coverage.yml) — if the threshold changes in one place it should be updated in both.

• Fixes Add coverage measurements to release workflows #65