AW3 — Finalize conformance baseline, WPT-style coverage, and expected-result metadata

[joris97jansen]

Description

Finalize the conformance baseline for the static no-JavaScript engine.

This issue should gather AG fixtures, WPT-style imports, regression fixtures, static reftests, parser/CSS/layout/paint/accessibility snapshots, and expected-result metadata into one release baseline.

The goal is to make conformance reproducible and honest.

Requirements

• Add a release conformance baseline manifest.

• Include parser/DOM fixtures.

• Include CSS selector/cascade/computed-style fixtures.

• Include URL/fetch/document-loading fixtures.

• Include image/resource fixtures.

• Include layout fixtures:

  • normal flow;

  • positioning/floats/fragments;

  • advanced layout systems.

• Include typography fixtures.

• Include paint/visual fixtures.

• Include responsive/print fixtures.

• Include forms/native interaction fixtures.

• Include accessibility fixtures.

• Include cache/cookie/network/storage fixtures.

• Include compositor/display-list/damage fixtures.

• Include real-world regression fixtures promoted from AU.

• Classify each test:

  • expected pass;

  • expected fail;

  • unsupported;

  • flaky;

  • backend-specific;

  • release blocker.

• Freeze expected-result metadata for the release candidate.

• Add conformance summary report.

• Add test-count and pass-rate reporting by subsystem.

• Ensure unsupported JavaScript-dependent WPT cases are classified, not counted as static failures.

• Add deterministic report output.

• Document how to update expected results after release.

Exit Criteria

• Release conformance baseline exists.

• Expected-result metadata is frozen for the release candidate.

• Test results are grouped by subsystem.

• Unsupported/deferred tests are classified honestly.

• Release blockers are visible.

• Conformance summary report is deterministic.

• The issue is closeable without requiring full WPT pass status.