vector-tile-encoding SKILL.md skillA
vector-tile-encoding 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/vector-tile-encoding@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/vector-tile-encoding/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261027.231c915, committed Oct 27, 2026
- First version recorded
- Oct 26, 2026
- Size
- 28,862 bytes
- Repository stars
- 24
- License
- GPL-3.0
How 37 map engines lay out vector geometry and attributes in a tile or baked binary (integer grid and extent, framing and versioning, columnar vs record layout, which encodings pay, pre-triangulation, ids, clipping at bake time), and how they decode foreign tiles (MVT, MLT, PMTiles) at run time. Load it when a map-from-scratch request needs tiles or a multi-zoom baked format, when bake.ts must clip data into tiles, when a renderer must read MVT/MLT/PMTiles at run time, or when choosing…
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
# Vector tile encoding: what to put in a tile, and what to leave out Every engine that draws vector data splits it into pieces the client can fetch, keep and draw independently, and every one of them then has to decide the same things: how coordinates are quantised, how a reader finds features and vertices, how attributes and strings are stored, whether triangles ship or are rebuilt, what happens to features cut at tile edges, and how the format can change later. General engines must also read formats they did not design (MVT, MLT, PMTiles), and much of their effort goes into undoing those formats' choices at run time. A renderer here owns its bake step (the rule in skills/map-from-scratch/SKILL.md), so most of those run-time costs can be paid once in `bake.ts`. This skill says which choices the engines measured, which paid, and which they reverted. It does not repeat patterns.md (projection at bake time, 16-bit quantisation over the bounding box, delta coding, Morton order, draw order at bake time); read that first. Per-engine detail: [references/engines.md](references/engines.md). ## Decision 0: do you need tiles at all? …
Read the whole file at its exact version.
How to install
mdr add yuiseki/map-from-scratch/vector-tile-encoding@sha256:2e70e4b50684bc9cThe 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_mngewjsq3o7234al)
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 | 28,862 B | A | view · diff |
| git:20261026.79a684e | 2026-10-26 | 79a684e | 28,853 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 (28862 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_mngewjsq3o7234al GET https://markdownregistry.com/api/v1/resolve?ref=yuiseki/map-from-scratch/vector-tile-encoding GET https://markdownregistry.com/api/v1/blob/2e70e4b50684bc9c0de414f4e60ee63cc1968e16305e7e8a8ebcd8b41a97e3a1
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.