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 agentmods add skills/athevon/genjutsu/compose-motionnpx skills add AThevon/genjutsu --skill compose-motiongit clone --depth 1 https://github.com/AThevon/genjutsuWrote 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/athevon/genjutsu/compose-motion)<a href="https://agentmods.dev/skills/athevon/genjutsu/compose-motion"><img src="https://agentmods.dev/badge/skills/athevon/genjutsu/compose-motion.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 | $0.00029 | $0.03294 |
| Opus 5 | $0.00015 | $0.01647 |
| Sonnet 5 | $0.00006 | $0.00659 |
| Haiku 4.5 | $0.00003 | $0.00329 |
Grade A, and why
compose-motion 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 4d 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.
This is a copy
92% identical to compose-motion — 4 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 360 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Compose Motion - Sub-skill
Jetpack Compose animation core. Loaded for Android Compose and Compose Multiplatform projects. Concise rules here. Deep-dive in
references/. Baseline: current stable Jetpack Compose (1.7+). Modern stable APIs only - noswipeable, noanimateContentSizehacks whereAnimatedContentis correct.
API Decision Tree
| Need | API |
|---|---|
| Single value over time | animateFloatAsState, animateDpAsState, animateColorAsState, etc. |
| Visibility / mount-unmount | AnimatedVisibility(visible) { ... } |
| Crossfade between states | Crossfade(target) { state -> ... } |
| Multi-state coordinated | updateTransition(target).animateFloat { ... } |
| Manual control / interruption | Animatable(initialValue) + animateTo(...) |
| Looping / infinite | rememberInfiniteTransition().animateFloat(...) |
| Shared elements | SharedTransitionLayout + Modifier.sharedElement(...) (Compose 1.7+) |
| Layout swap with anim | AnimatedContent(target) { ... } |
| Drag / swipe | Modifier.draggable + Animatable.snapTo/animateTo, or Modifier.anchoredDraggable for snap-points |
Rule: climb the ladder only when needed. animate*AsState covers 70% of cases. Reach for Animatable only when you need to interrupt, chain, or read velocity.
Spring API (opinionated defaults)
| Use | Spec |
|---|---|
| UI snap (modal, drawer, tab) | spring(stiffness = Spring.StiffnessMediumLow, dampingRatio = Spring.DampingRatioNoBouncy) |
| Tactile (button press release, toggle) | spring(stiffness = Spring.StiffnessMedium, dampingRatio = 0.85f) |
| Bouncy reveal (toast, FAB, success) | spring(stiffness = Spring.StiffnessLow, dampingRatio = Spring.DampingRatioMediumBouncy) |
| Drag follow (1:1 finger tracking) | spring(stiffness = Spring.StiffnessHigh, dampingRatio = 1f) |
Stiffness constants: VeryLow 200, Low 400, MediumLow 700, Medium 1500, High 10000. Higher = faster settle. Damping constants: HighBouncy 0.2, MediumBouncy 0.5, LowBouncy 0.75, NoBouncy 1.0. Below 1.0 overshoots. Springs ignore durationMillis; if you need a deterministic duration, use tween(...) instead.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 4d ago First seen · 360 lines · 29 tokens per session scan A e20a68002e3c
compose-motion is a skill published in the GitHub repository AThevon/genjutsu (316 stars, last pushed 1mo ago), licensed MIT. It adds 29 tokens to every session and 3,294 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to compose-motion, differing in 4 lines, and is treated as a copy.
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