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---
name: ztx9-motion-determinism
description: Animation fixture and playhead ownership for Codex Perfect_AI production websites. Additive to all previous skills.
---
# Animation fixture and playhead ownership
## Task-specific procedure
Expose a test-only seek(progress) hook that drives exactly one authoritative timeline and one Three.js render tick. Freeze random seed, wait for document.fonts.ready and loaded textures; create measurable renderComplete() contract.
## Integration
Read `.agents/ztx9-frame-space-device-lab/references/01-animation-frame-inspector.md` and execute its validation contract. Start by establishing baseline and technology versions; avoid forcing this Skill on unrelated routes or states. After integration, run browser/device tests applicable to this feature, compare evidence and provide the exact files changed.
## Completion criteria
Record screenshot/report or measurements, testing environment, pass/fail and unresolved issues. Preserve old skills and functions. The mere existence of this SKILL.md is not evidence of implementation.
