mobile-and-power SKILL.md skillA
mobile-and-power from yuiseki/map-from-scratch is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add yuiseki/map-from-scratch/mobile-and-power@git:20261027.231c915Pins git:20261027.231c915 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- yuiseki/map-from-scratch
- Path
.agents/skills/mobile-and-power/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261027.231c915, committed Oct 27, 2026
- First version recorded
- Oct 26, 2026
- Size
- 32,034 bytes
- Repository stars
- 24
- License
- GPL-3.0
What map engines learnt about phones, tablets, battery-powered and always-on devices (idle cost, pixel budget, memory limits enforced by killing, GPU driver quirks, touch input, measuring on real devices), distilled for a map-from-scratch renderer. Load it when a request names a phone, tablet, iOS Safari, Android, a battery or always-on display, a kiosk or a small board, when a spec has a device_scale_factor above 1, cpu_throttle or a memory budget, or when a bench or user report shows idle…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Mobile and power: idle, pixels, memory, drivers and the bench On a phone the same renderer meets four limits a desktop hides. A frame nobody asked for still costs battery. Pixels cost the square of the device pixel ratio. Memory is not swapped: the OS or browser kills the tab, the canvas or the worker without warning. And the GPU driver is one of hundreds, some of which crash or render black on code that is valid. The 37 engines studied here all paid for these, and several reversed a decision more than once. The repository's own mobile example (02) is benched at 390x844, DPR 3 and 4x CPU throttle, draws one rAF per change, sizes its canvas at the full device pixel ratio, and treats `webglcontextlost` as a bench error rather than recovering [1]. Neighbouring skills: resolution and MSAA costs in `antialiasing-and-blending`, byte budgets and fetch queues in `tile-cache-and-loading`, shader precision in `float-precision`. Per-engine detail, the driver-quirk catalogue and native-app notes (backends, render threads, start-up, bundled archives) are in [references/engines.md](references/engines.md); it uses the numbering of the Sources list below. …
Read the whole file at its exact version.
How to install
mdr add yuiseki/map-from-scratch/mobile-and-power@sha256:46f98b076fe4f693The line at the top of this page pins the label git:20261027.231c915, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_rscjwun73octexpv)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Oct 26, 2026 and Oct 27, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261027.231c915 latest | 2026-10-27 | 231c915 | 32,034 B | A | view · diff |
| git:20261026.79a684e | 2026-10-26 | 79a684e | 32,032 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (32034 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
yuiseki/map-from-scratch · 24 stars · license GPL-3.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rscjwun73octexpv GET https://markdownregistry.com/api/v1/resolve?ref=yuiseki/map-from-scratch/mobile-and-power GET https://markdownregistry.com/api/v1/blob/46f98b076fe4f693594cffefa1bac44afcea466b5c28b316be6fd8d2c67d861c
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.