map-from-scratch SKILL.md skillA
map-from-scratch 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/map-from-scratch@git:20261105.a3ec914Pins git:20261105.a3ec914 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/map-from-scratch/SKILL.md- Versions recorded
- 8
- Latest version
- git:20261105.a3ec914, committed Nov 5, 2026
- First version recorded
- Oct 26, 2026
- Size
- 11,696 bytes
- Repository stars
- 24
- License
- GPL-3.0
Build the smallest, fastest map renderer for one request ("I want to do X, so make me a map"), almost from scratch, drawing on the map engines collected in ref-repos, and prove it with measurements. Use when someone wants a map front end for a specific purpose, data set, device or performance target, rather than a general-purpose map engine.
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
# /map-from-scratch: a renderer made for one request A general map engine pays for every feature it might need. A renderer made for one request pays only for that request. This skill writes such a renderer in `examples/<nn>-<slug>/` of the map-from-scratch repository, defines it in `spec.yaml`, measures it with the harness, and keeps changing it until the numbers say it is small and fast enough for what was asked. Repository: `~/Workspaces/repos/__yuiseki/map-from-scratch` (below: the repo). Everything runs in Docker through `bin/mfs`; the host needs only docker and, for GPU examples, the nvidia container runtime. The repo is GPL-3.0-or-later. ## Rules - One request, one renderer. Do not grow an earlier example into a shared engine. Copy the closest example and cut it down. - Learn from the engines in `ref-repos/` (MapLibre GL JS and Native, Cesium, deck.gl, OpenLayers, QGIS, Mapnik, Organic Maps, ortho-earth and ~40 more; `ref-repos/clone.sh` fetches them). Read how they solve the sub-problem in front of you, then write only the part this request needs. Code under GPL-3, GPL-2.0-or-later, LGPL or a permissive licence may be adapted with a comment …
Read the whole file at its exact version.
How to install
mdr add yuiseki/map-from-scratch/map-from-scratch@sha256:ab470edda8a32420The line at the top of this page pins the label git:20261105.a3ec914, 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_kyybi4dmgzklh7kp)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 8 versions of this file, between Oct 26, 2026 and Nov 5, 2026, about one every day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261105.a3ec914 latest | 2026-11-05 | a3ec914 | 11,696 B | A | view · diff |
| git:20261103.49f0b17 | 2026-11-03 | 49f0b17 | 11,677 B | A | view · diff |
| git:20261030.bd411ee | 2026-10-30 | bd411ee | 11,219 B | A | view · diff |
| git:20261030.5255728 | 2026-10-30 | 5255728 | 11,204 B | A | view · diff |
| git:20261030.8e38551 | 2026-10-30 | 8e38551 | 10,852 B | A | view · diff |
| git:20261027.80aa384 | 2026-10-27 | 80aa384 | 10,645 B | A | view · diff |
| git:20261027.231c915 | 2026-10-27 | 231c915 | 10,624 B | A | view · diff |
| git:20261026.a57b65f | 2026-10-26 | a57b65f | 10,623 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 (11696 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_kyybi4dmgzklh7kp GET https://markdownregistry.com/api/v1/resolve?ref=yuiseki/map-from-scratch/map-from-scratch GET https://markdownregistry.com/api/v1/blob/ab470edda8a32420d600ac4c1dbf2787581417342703e2f787b24c5d3aa3951c
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.