Normalize legacy frameset navigation

[chubes4]

Summary

• Finalized Homeboy agent-task cook run blocks-engine-606-legacy-frameset into review-ready branch fix/606-legacy-frameset.

Proof provenance

• Proof runner: Homeboy agent-task cook loop
• Proof ID: agent-task-finalization:blocks-engine-606-legacy-frameset
• Homeboy run ID: blocks-engine-606-legacy-frameset
• Manual proof: none recorded by this Homeboy finalization

Publication intent

• Schema: homeboy/agent-task-publication-intent/v1
• Action: review_request
• Target kind: code_review
• Adapter: github_pull_request
• Base: trunk
• Head: fix/606-legacy-frameset

Source refs

• Normalize legacy frameset navigation before transformation #606

Attempt summary

green deterministic gates completed

Gate results

• php-transformer: passed (targeted)
• diff-check: passed (targeted)

Verification capability

• targeted_checks_run: cd php-transformer && composer test, git diff --check
• targeted_checks_unavailable: none recorded
• ci_expected: none recorded
• manual_reviewer_check: Run isolated SSI fixture 30-cursed-pangolin-fanwiki and confirm editor/frontend navigation complete without recursive frame resource amplification.

CI-equivalent coverage

• CI-equivalent required gate: CI-equivalent required gate was not recorded; targeted proof must not be treated as full CI coverage

Changed files

• php-transformer/src/HtmlToBlocks/DocumentNormalizationPolicy.php
• php-transformer/src/HtmlToBlocks/FallbackDiagnostic.php
• php-transformer/src/HtmlToBlocks/HtmlTransformer.php
• php-transformer/tests/contract/finding-contract.php
• php-transformer/tests/fixtures/parity/html-legacy-frameset-noframes-fallback.json

Artifact refs

• none recorded

Final status

• Status: review-ready
• Base: trunk
• Head: fix/606-legacy-frameset
• Merge/deploy: not performed

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode orchestrated by Homeboy
• Model: openai/gpt-5.6-sol
• Used for: Diagnosed recursive legacy frame navigation, implemented generic noframes normalization and typed diagnostics, and added deterministic coverage with Chris.

[chubes4]

Closing after live candidate validation. The diagnostic and normalization behaved as implemented, but the intentionally cursed fanwiki fixture remained a deliberate stress timeout and is not a supported target. We are not shipping production scope solely to make this adversarial fixture pass.