Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add LiuYihey/Agent-Engineering --skill hero-motion-sync-uxgit clone --depth 1 https://github.com/LiuYihey/Agent-EngineeringWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/liuyihey/agent-engineering/hero-motion-sync-ux)<a href="https://agentmods.dev/skills/liuyihey/agent-engineering/hero-motion-sync-ux"><img src="https://agentmods.dev/badge/skills/liuyihey/agent-engineering/hero-motion-sync-ux.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00058 | $0.00626 |
| Opus 5 | $0.00029 | $0.00313 |
| Sonnet 5 | $0.00012 | $0.00125 |
| Haiku 4.5 | $0.00006 | $0.00063 |
Grade A, and why
hero-motion-sync-ux scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Hero Motion Sync UX
Goal
Make landing hero feel coherent: text and molecule switch on the same beat, use the same float-in feel, and avoid overlap/blank-frame/white-flash artifacts.
Apply When
- User asks to sync hero text and molecule transitions.
- User reports visual issues like overlap, flicker, white frame, or blank gap.
- User asks to tune float-in speed/easing and keep both sides consistent.
Implementation Pattern
-
Use one shared motion config
- Keep cadence and motion tokens in one file (for example
heroMotionConfig.js). - Put at least: interval, float duration, easing, offset, opacity/scale start.
- Both text and molecule components must import these shared constants.
- Keep cadence and motion tokens in one file (for example
-
Use one shared timeline source
- Drive switching with one index in the page container (for example
heroCycleIndex). - Pass the same index to text and molecule components.
- Avoid independent timers per component in controlled mode.
- Drive switching with one index in the page container (for example
-
Prefer single-viewer molecule swap
- Keep one 3D viewer/canvas; replace model in place after next data is ready.
- Do not use layered cross-fade canvases unless required.
- On fetch failure, keep current molecule visible and retry later.
-
Use no-gap single-word text switch
- Avoid multi-word overlap rendering.
- Avoid "old word disappears, then blank, then new word" gap.
- At switch point, update word immediately, then run float-in on the new word.
-
Tune by adjusting shared constants only
- Slow down/speed up by changing shared duration once.
- Keep text and molecule motion parity by avoiding per-component magic numbers.
UX Guardrails
- No overlap: old/new text should not be simultaneously readable.
- No blank flash: no empty frame between text swaps.
- No white screen: molecule area should not flash white during switch.
- No drift: text and molecule switch timestamps stay aligned over time.
Validation Checklist
- Text and molecule switch on the same tick.
- Float-in duration/easing feel identical on both.
- Repeated cycles show no timing drift.
- Network slowdown does not blank the molecule area.
- Build and lints pass after edits.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 62 lines · 58 tokens per session scan A dea597ef8c1c
hero-motion-sync-ux is a skill published in the GitHub repository LiuYihey/Agent-Engineering (5 stars, last pushed 1mo ago), licensed MIT. It adds 58 tokens to every session and 626 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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