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Preserve CSS property IDs while updating metadata contract - #620
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This was referenced Sep 19, 2026
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Closes #617. Advances #235 and #227.
Restores append-only CSS property identity after
aspect-ratiowas inserted into the managed and native ordered registries and renumbered every later ID. Moves it to the append boundary, regenerates both property tables, and strengthens the metadata contract with fingerprints for the immutable original prefixes plus explicit appended entries. Also reconciles the deliberately expanded mask/property/accessor boundaries.Validation: generated outputs were produced and
git diff HEAD^..HEAD --checkpassed. Generator check mode, focused unit tests, managed/native builds, and Linux/macOS CI remain unexecuted under the current implementation-throughput directive.