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Animate foreground filters in CSS keyframes - #544
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This was referenced Sep 19, 2026
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Closes #543. Advances #242 and #235.
WebScene now carries bounded compatible foreground-filter lists through CSS keyframe parsing and host-clock interpolation, including Code OSS brightness and blur effects. Temporal values reach CSSOM and scene paint with correct identities, finite fill/events, visible-only frame demand, detach cleanup, and memory accounting while remaining paint-only.
Validation intentionally deferred under the current fast-merge instruction:
git diff --checkpassed; native temporal/lifecycle, Code OSS, browser performance, and pixel-reference regressions were authored but not executed.