[chubes4]

Summary

Fix #3565 in php-transformer/. Read the issue and its acceptance comment first.

What changed

• Updated php-transformer/composer.json in the delivered candidate.
• Updated php-transformer/src/HtmlToBlocks/HtmlCompilation.php in the delivered candidate.
• Updated php-transformer/src/HtmlToBlocks/Style/AuthorStyleRuleProjector.php in the delivered candidate.
• Updated php-transformer/src/HtmlToBlocks/Style/AuthorStylesheetProjectionContext.php in the delivered candidate.
• Updated php-transformer/src/HtmlToBlocks/Style/AuthorStylesheetProjector.php in the delivered candidate.
• Updated php-transformer/src/HtmlToBlocks/Style/CascadeLayer.php in the delivered candidate.
• Updated php-transformer/src/HtmlToBlocks/Style/ContentBoxRestatements.php in the delivered candidate.
• Updated php-transformer/tests/unit/artifact-author-stylesheet-projection.php in the delivered candidate.
• Updated php-transformer/tests/unit/content-box-min-max-size.php in the delivered candidate.
• Updated php-transformer/tests/unit/content-box-support-sheet.php in the delivered candidate.
• Updated php-transformer/tests/unit/css-comment-in-declarations.php in the delivered candidate.
• Updated php-transformer/tests/unit/html-transformer-session-state.php in the delivered candidate.
• Delivered candidate verified with 1 deterministic Cook gate(s); no separate compatibility assessment was recorded by the implementation attempt.

Verification

• passed on faeec3f. Base trunk@e392171 unchanged.

cd php-transformer || exit 1
echo "== composer install"; composer install --no-interaction --no-progress --quiet || exit 1
echo "== phpstan"; composer run-script lint:types || exit 1
echo "== phpcs"; vendor/bin/phpcs --standard=phpcs.xml.dist -p --report=summary || exit 1
echo "== acceptance (issue #3565; readable source in the issue comments)"
echo 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| php -r '$f = tempnam(sys_get_temp_dir(), "acc"); file_put_contents($f, hex2bin(trim(stream_get_contents(STDIN)))); $c = 0; passthru(PHP_BINARY . " " . escapeshellarg($f), $c); unlink($f); exit($c);' || exit 1
echo "== new test"; php tests/unit/content-box-support-sheet.php || exit 1
grep -q 'tests/unit/content-box-support-sheet.php' composer.json || { echo "content-box-support-sheet.php is not registered in test:unit"; exit 1; }
echo "== unit + canonical suites"
tests=$(php -r '$s=json_decode(file_get_contents("composer.json"),true)["scripts"]; foreach(array_merge($s["test:unit"],$s["test:canonical"]) as $c) if ($c[0] !== "@") echo $c,"\n";' | sort -u | grep -v 'generated-artifact-provenance')
failed=0
while read -r c; do
  if out=$(timeout 300 bash -c "$c" 2>&1); then echo "ok   $c"; else echo "FAIL $c"; echo "$out" | tail -20; failed=1; fi
done <<TESTS
$tests
TESTS
[ "$failed" = 0 ] || exit 1
echo "== parity"; composer run-script test:parity || exit 1
echo "all gates passed"

• CI: pending

Cook run

• Gate 1: tree 08ef6e37adcf947acf66a95c88f3eac3e62a2803, fingerprint 1c44a5c4fc036f0b7cb6ab5c9d100a66b8819a817001f75cd02941c0b50d841f
• Publication identity: ambient_gh

AI assistance

Tool: Implementation: Homeboy (pi); review form: Homeboy (pi) · Model: Implementation: claude-opus-5-5 (tier roadie/anthropic-claude-opus-5-5); review form: claude-opus-5-5 (tier roadie/anthropic-claude-opus-5-5) · Used for: Implementation: Homeboy (pi) authored the delivered candidate changes and deterministic verification evidence. Review form: Homeboy (pi) reviewed the validated candidate and supplied the reviewer metadata.

Closes #3565

[chubes4]

Context for this merge

The first commit came from the Homeboy cook. Its first attempt ended candidate_recoverable after composer install stalled during gate setup. The recovery commands reported a no-op, so the operator authorized finishing outside Homeboy. A second cook attempt then opened this PR. Two later commits were added by hand:

• Group-class guard (450eb5418). A source box that already carries wp-block-group gets no box-sizing:content-box restatement. On the source WordPress, core's .wp-block-group{box-sizing:border-box} already renders it border-box, as the output does. Without the guard, the pet-store product cards (raw HTML wp-block-group paw-card, height:100%; padding:1.5rem) ran 50px past their columns at 390px. A test case was added in tests/unit/content-box-support-sheet.php. It fails without the guard.
• Merges of trunk and the cook's branch tip. Neither changed the tree.

Pixel difference against the source on a pet-store block theme. The host keeps the theme stylesheet and installs only the support sheets.

Page	trunk	merged
home 1280	0.40%	0.06%
shop 1280	0.55%	0.09%
home / shop 390	0.54% / 0.54%	0.54% / 0.54%

Before merge, the following passed: all 627 test:unit + test:parity scripts, the 13-check acceptance script on #3565, phpcs, phpstan and 15/15 CI checks.

---

How AI was used: Claude (via the Pi coding agent in a Roadie session) wrote the guard and its test, measured the theme and merged; the cook (Homeboy, Pi) wrote the first commit. Reviewed by a human.