Registry flowchart blocks render blank on 0.7.x: tl.labels is unreadable under the render compiler

[jurczykpawel]

Summary

The registry blocks flowchart and flowchart-vertical render blank (dotted-grid background only, no nodes/connectors) on every hyperframes@0.7.x render, and every render that mounts them pays the full 45 s sub_timeline_readiness_timeout.

Reproduction

1. hyperframes init a project (or take any existing one) and add the registry block:

   hyperframes add flowchart-vertical

2. Mount it as a sub-composition window in index.html:

   <div class="clip" data-composition-id="flowchart-vertical"
        data-composition-src="compositions/flowchart-vertical.html"
        data-start="1" data-duration="3" data-track-index="1"
        data-width="1920" data-height="1080"></div>

3. npx hyperframes@0.7.60 render

Expected: the flowchart animates inside its window.
Actual: only the dotted-grid background is captured for the whole window, and the render logs:

[sub_timeline_readiness_timeout] Sub-composition timelines did not become ready within 45000ms

With browser console visible, the root cause is explicit:

[Compiler] Composition script failed flowchart-vertical ... TypeError: Cannot read properties of undefined (reading 'hold5')

Root cause

registry/blocks/flowchart-vertical/flowchart-vertical.html (and the landscape flowchart twin) schedule the "Pythom" → "Python" typing correction by reading a label position back off the timeline:

tl.addLabel("hold5", "+=0.2");
// ...
const typingStart = tl.labels["hold5"];   // ← throws under the render compiler

The 0.7 render compiler executes composition <script>s under a GSAP proxy whose timeline exposes no readable .labels map, so this line throws before window.__timelines[...] = tl runs. The timeline is never registered → the readiness gate times out → the block ships blank.

Environment

Reproduced identically on:

• macOS 15 arm64, native npx hyperframes@0.7.60 render
• linux/amd64 (Docker), same version

The blocks work in Studio preview (real GSAP, .labels readable) — only the render compiler path breaks, which makes this easy to miss.

Fix

Use GSAP's own label-relative position syntax ("hold5+=<offset>") instead of reading .labels back — the idiom every other step in these files already uses. Timing is identical. PR incoming.