tile-cache-and-loading SKILL.md skillA
tile-cache-and-loading 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/tile-cache-and-loading@git:20261026.79a684ePins git:20261026.79a684e 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/tile-cache-and-loading/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261026.79a684e, committed Oct 26, 2026
- Size
- 24,913 bytes
- Repository stars
- 24
- License
- GPL-3.0
How map engines schedule, cancel, prioritise, cache and evict tiles or byte ranges, and what they reverted, distilled for a map-from-scratch renderer. Load it when a request's data does not fit in one baked file fetched once (streamed tiles, HTTP Range reads into PMTiles, GeoParquet or FlatGeobuf, live or refetched data), when writing a fetch queue, a tile or index cache, a memory budget or a persistent (Cache API, IndexedDB) cache, or when a bench shows request floods, blank tiles while…
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
# Tile cache and loading: what to fetch, in what order, and what to keep A streaming renderer repeatedly decides which tiles or byte ranges to request, how many at once, in what order, which in-flight requests to drop when the view moves, what to draw while they load, how many bytes of decoded tiles to keep, and under which key a cached copy is still valid. Each of these decisions has caused request floods, leaked memory, blank or stale tiles, or a cache that thrashed in at least one of the 47 engines in `ref-repos/`. Most map-from-scratch requests avoid all of this: every example so far bakes its data and loads it whole [2]. Load this skill when that stops being true. Per-engine detail, with more numbers, is in [references/engines.md](references/engines.md). Neighbouring skills: the archive layout and Range mechanics are in `data-range-requests`, parent and child placeholders and overzoom in `tile-lod-and-overzoom`. ## First: do you need any of it? - **One baked file that fits the memory budget, fetched once.** You need no tile cache, scheduler or persistent store. Give the file a stable or versioned URL and let the browser's HTTP cache work. maplibre-rs leaves …
Read the whole file at its exact version.
How to install
mdr add yuiseki/map-from-scratch/tile-cache-and-loading@sha256:982ba1565eb620fcThe line at the top of this page pins the label git:20261026.79a684e, 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_k7ydqqs2wng2irmi)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 26, 2026.
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 (24913 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_k7ydqqs2wng2irmi GET https://markdownregistry.com/api/v1/resolve?ref=yuiseki/map-from-scratch/tile-cache-and-loading GET https://markdownregistry.com/api/v1/blob/982ba1565eb620fc687ca66eb9f35e2b0be948f702c8c1197c89989300e7933a
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.