User mandate 2026-07-02: complete new movement + animation system,
verbatim retail equivalent, all entity classes, inbound + outbound, no
frozen code, no bandaids. Executed as a staged verbatim reconstruction
(R1 CSequence -> R8 cutover audit), each stage harness-gated with the
proven cdb-golden technique; legacy paths DELETED at each cutover.
Supersedes L.2g S3-S6; absorbs shipped S1/S2/S5 as components.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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