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Miguel ÁngelandClaude Sonnet 4.6
9e51f5cfaa
Detects when an element has CSS `opacity: 0` (inline or style block) AND
is targeted by gsap.from({opacity: 0}). Since from() animates FROM the
specified value TO the CSS value, this produces a 0→0 animation where
the element never becomes visible.
Root cause of all-black renders from the product-launch-video skill:
every text element had opacity:0 in CSS + gsap.from({opacity:0}),
making all text permanently invisible despite the timeline "working."
Fires as error (not warning) to block the render pipeline. Includes
actionable fix hint. 4 test cases: inline style, style block, clean
code (no false positive), and gsap.to() exit (no false positive).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>