Performance Craft
Design that holds its frame rate — because janky motion is failed design, not a separate engineering concern. Per-platform rendering discipline: compositor-friendly CSS and GPU layers on the web; ProMotion/adaptive-refresh timing, Metal particle/overdraw budgets, and efficiency-core scheduling on Apple platforms; draw-call and fill-rate budgets in game engines. Includes the graceful-degradation l…
Install
$ agentstack add skill-jangles-byte-atelier-performance-craft ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-jangles-byte-atelier-performance-craft) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Performance Craft
A dropped frame is a design defect the user feels before they can name it. This skill treats the frame budget as a design material: know the budget, spend it on what the philosophy values, and degrade in the order that does the least visual damage.
The budget
Frame time = 1000 / refresh rate: 8.3ms at 120Hz, 16.6ms at 60Hz — minus the platform's own compositing overhead. Design for the display the audience has: ProMotion phones and most gaming displays are 120Hz; never hardcode 60. Measure before and after any motion work — profilers, not vibes (DevTools Performance / Instruments' Animation Hitches / engine profilers).
Which reference to load
| Situation | Load | |---|---| | Web: CSS/JS/canvas/WebGL animation, scroll jank, layout thrash | references/web-rendering.md | | Apple: SwiftUI/UIKit hitches, Metal, ProMotion, battery/thermals | references/apple-silicon.md | | Game engines, particles at scale, and the degradation ladder | references/budgets-and-degradation.md |
Non-negotiables
- Animate compositor-friendly properties (transform, opacity — and their platform
equivalents) unless a measured reason says otherwise.
- Timing from delta-time or the platform's frame callback, never a hardcoded
1/60 assumption.
- Always-on ambient animation must be provably cheap: paused off-screen, GPU-only,
and off the performance cores / not preventing CPU idle.
prefers-reduced-motion(and platform equivalents) is also the low-power path —
wire them together.
- When the budget is blown, cut by the degradation ladder — never ship the stutter,
and never fix it by cutting the design's primary feedback motion first.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: jangles-byte
- Source: jangles-byte/atelier
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.