# HyperFrame Schema Compliance Review

## Executive Summary

- Total files reviewed: 4
- Critical issues: 0
- Overall compliance status: PASS

## Critical Issues

None. The compositions follow the core requirements for deterministic execution, finite timelines, and proper registration.

## Compliance Checklist

- [x] All compositions have `data-width` and `data-height` attributes
- [x] All timelines are finite with duration > 0
- [x] All compositions registered in `window.__timelines`
- [x] No use of `Math.random()`, `Date.now()`, or non-deterministic code
- [x] Primitive clips have required data attributes (`id`, `data-start`, `data-track`)
- [x] `data-duration` specified for all `<img>` clips (N/A - no images used)
- [x] No manual media playback control (`video.play()`, `audio.pause()`, etc.)
- [x] No manual clip mounting/unmounting in scripts
- [x] Relative timing references are valid (N/A - absolute timing used)
- [x] Clips on same track don't overlap in time
- [x] Reusable compositions in separate HTML files
- [x] Composition files use `<template>` tags
- [x] External compositions loaded via `data-composition-src`
- [x] All script-animated content wrapped in compositions
- [x] No infinite or zero-duration timelines

### index.html

**Status**: COMPLIANT

**Issues Found**:

- None. The root composition correctly orchestrates sub-compositions and the A-roll video.

### compositions/background-grid.html

**Status**: COMPLIANT

**Issues Found**:

- None. Uses deterministic loops and index-based calculations for animations. Correctly registers its timeline.

### compositions/stats-overlay.html

**Status**: COMPLIANT

**Issues Found**:

- None. Uses a static transcript for timing and follows the schema for sub-compositions.

### compositions/captions.html

**Status**: COMPLIANT

**Issues Found**:

- None. Correctly wraps dynamic caption groups within a composition and manages them via script.
