Verify ctx changes

1. Inspect the requested behavior and changed surface. Read only the relevant section of CONTRIBUTING.md before selecting checks.
2. Run the smallest focused tests or deterministic checks that exercise the changed behavior first.
3. Escalate evidence in proportion to risk:
   • Small, localized change: focused tests, schemas, or diff checks.
   • Material repository change: scripts/no_mistakes_run.sh fast.
   • PR-level, contract, workflow, migration, packaging, security, or release change: run the fast gate, then python scripts/ci_preflight.py --profile pr.
   • Documentation navigation or linked public-asset change: follow the tracker contract in CONTRIBUTING.md; do not require tracker changes for ordinary prose-only edits.
   • Windows-sensitive change: follow the native-CI contract in CONTRIBUTING.md; local checks do not replace required Windows evidence.
4. Treat the fast gate as committed-history evidence. When the working tree is dirty, pair it with focused checks against the actual uncommitted changes.
5. If a gate cannot find its trusted pytest, Ruff, and mypy environment, report the environment failure. Do not silently install dependencies or weaken the trust check.
6. Use an independent validator only when semantic risk remains after deterministic checks, especially for material security, migration, or release work.
7. Report each check, its result, and any omitted or unavailable evidence.

Rubric

Mark each applicable criterion pass, fail, or not verified:

• Intent: The artifact satisfies the request without unrelated scope.
• Behavior: Fresh evidence covers the changed success path and relevant failure or regression paths.
• Static integrity: Applicable lint, formatting, and type checks pass.
• Repository contracts: Migration, changed-file, documentation, packaging, and platform requirements remain satisfied where relevant.
• Evidence quality: Results apply to the actual changed surface and are not stale or inapplicable.
• Handoff: Skipped checks and residual risks are stated plainly.

Do not claim completion while an applicable criterion fails. Treat missing required evidence as not verified, not as a pass.