F Kitchen Sink

UX audit rules

Py Optional Regions

Rule handbook metadata

Rule
DET.PY.OPTIONAL_REGIONS · lane deterministic
Page status
current
page_version
e40887ce72864aca941a8a7fc73ad0ce61bdd4ec1233901831b0ccc61deffc87
generated_at
2026-05-23T13:24:10Z
registry_fingerprint
aef1de6082cf0f50d463783c843dee0ffb9132fbd5ed4ea6e5bb3f031f359c72

How this rule is fixed

Pilot deterministic fixer: handbook_after · harness mode standalone · verify expect_rule_clean.

  • Harness: apply-harness-fixture-remediation.py copies the After example HTML from this handbook page onto the defect fixture, then invoke-det-ruleset-remediation-verify.sh re-audits and expects zero findings for this rule.
  • Production sites: run-website-ux-remediation-loop.sh runs handbook_html_patch (HTML patches in lib/ux-deterministic-fixers/fixers/patches/) before invoking the Cursor agent when the quality gate still fails.

Detection module: docs/design/ux-audit/deterministic-design-rules.md#det-py-optional_regions. Scroll down for Before / After examples and Evidence and remediation steps.

Purpose

Bootstrap page for the DET ruleset harness. Examples are minimal Kitchen Sink markup aligned with design-rules/deterministic/generated/det-py-optional-regions.check.js.

Passing signals

  • After example satisfies the rule on audit.

Failing signals

Before example

Before (failing example)

Announcement

After example

After (passing example)

Evidence and remediation

Run generator/build_rule_defect_fixtures.py and auditor-tests/invoke-det-ruleset-harness.sh --only-rule DET.PY.OPTIONAL_REGIONS.