What is compose-motion?

A guide to the standard animation tools in Jetpack Compose, Android's system for building interfaces with Kotlin. It covers animations for values, visibility, state changes, shared elements, layouts, and gestures.

Use it to animate Android or Compose Multiplatform interfaces, including appearing content, crossfades, coordinated state changes, drag interactions, and shared elements.

It helps choose the appropriate built-in Compose tool for each animation instead of using unsuitable or outdated approaches.

How Jwuthri/Tracely-ai configures Claude Code and Codex

About the project

Tracely is a CI/CD system for AI agents that turns failed production traces into replayable regression tests. Development teams use it to detect and group agent failures, run the resulting cases on pull requests, and block changes that reproduce those failures. The catalogue entries provide skills for operating this trace-based testing and observability workflow.

Jwuthri/Tracely-ai · 1,311 stars · on GitHub · tracely-ai.com

Reuse

Borrowing it

Nothing to install: this file belongs to Jwuthri/Tracely-ai. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Jwuthri/Tracely-ai/master/.agents/skills/compose-motion/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/Jwuthri/Tracely-ai

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/jwuthri/tracely-ai/compose-motion/github.svg)](https://agentmods.dev/skills/jwuthri/tracely-ai/compose-motion)

Your own site

<a href="https://agentmods.dev/skills/jwuthri/tracely-ai/compose-motion"><img src="https://agentmods.dev/badge/skills/jwuthri/tracely-ai/compose-motion/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/jwuthri/tracely-ai/compose-motion"><img src="https://agentmods.dev/badge/skills/jwuthri/tracely-ai/compose-motion.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,273 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

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	$0.00029	$0.03273
Opus 5.5	$0.00012	$0.01309
Sonnet 5.5	$0.00006	$0.00655
Haiku 4.5	$0.00003	$0.00327

Measured 2mo ago against content hash f1673ec03144, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 2mo 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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

compose-motion — 92% identical, 4 lines differ
compose-motion — 92% identical

.agents/skills/compose-motion/SKILL.md · 360 lines

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: Compose 1.7+ (April 2026 stable). Modern stable APIs only - no swipeable, no animateContentSize hacks where AnimatedContent is 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.

Read the full file on GitHub · 360 lines

Files

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.

Changes

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.

2mo ago First seen · 360 lines · 29 tokens per session scan A f1673ec03144

Subscribe to this mod's changes

compose-motion is a skill published in the GitHub repository Jwuthri/Tracely-ai (1,311 stars, last pushed yesterday), licensed MIT. It adds 29 tokens to every session and 3,273 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.

CI and CD Creative and media ai-agents evals llm-evaluation llm-observability llm-ops

compose-motion next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
compose-motionJwuthri/Tracely-ai	Skill	1.3k	yesterday	MIT	A	29	Claude Code, Codex
factory-releasetikalk/adlc-team-skills	Skill	145	yesterday	MIT	A	72	Claude Code, Codex
pin-mcp-serversyotambraun/Toolscore	Skill	6	6d ago	Apache-2.0	A	107	Claude Code
Prompt Version Control WorkflowNotysoty/openagentskills	Skill	9	2mo ago	MIT	A	30	Claude Code, Codex
llm-testerbuiphucminhtam/forgewright	Skill	49	2d ago	none	A	49	Claude Code
report-repairastandrik/my_instructions	Skill	6	1mo ago	MIT	A	16	Claude Code
local-validatorastandrik/my_instructions	Skill	6	1mo ago	MIT	A	20	Claude Code

Tracely-ai: Skill for Claude Code