61_required-structure-hardening.md

id	61
title	Required Structure Rule Hardening
status	✅

Required Structure Rule Hardening

Goal

Improve MDS020 required-structure reliability and diagnostics so template-driven docs fail for real structure mismatches with clear, actionable messages.

Tasks

1. Audit current MDS020 behavior against rules/proto.md and identify mismatch classes not covered by tests (heading order/level, optional sections, sync fields).
2. Expand requiredstructure unit tests with focused fixtures for false positives and false negatives, including front matter/body sync scenarios.
3. Refine matching logic for required headings and sync points to reduce ambiguous comparisons and improve determinism.
4. Improve diagnostic messages to include expected vs actual structure details and precise heading context.
5. Update rules/MDS020-required-structure/README.md with clarified settings, examples, and diagnostics.

Acceptance Criteria

• MDS020 correctly detects missing, reordered, and wrong-level required headings from template input.
• Sync checks correctly validate heading/body placeholders against front matter fields without spurious matches.
• Diagnostics include actionable expected vs actual detail at stable line locations.
• Tests cover representative success/failure cases, including template config edge cases.
• All tests pass: go test ./...
• golangci-lint run reports no issues