Rule handbook metadata

Rule: DET.SECTION.HEADING · lane deterministic
Page status: current
page_version: 2ff2b812e0500ea93c7a80ee609376e1d41b1bd16fb3663295dd87736c8c4226
generated_at: 2026-05-23T13:24:10Z
registry_fingerprint: 2ce40848effce579d3e4879f6ca85535183a14db201870a6c007da424624550c

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-section-heading. 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-section-heading.check.js.

Passing signals

After example satisfies the rule on audit.

Failing signals

Before example triggers DET.SECTION.HEADING on the defect fixture.

Before example

Before (failing example)

Page title

Skipped level

Heading hierarchy jumps from h1 to h3.

After example

After (passing example)

Forge UX rule handbook for section headings

Section

Sequential heading levels.

Evidence and remediation

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