ascii-city-engine SKILL.md skillA
ascii-city-engine from magnus919/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add magnus919/agent-skills/ascii-city-engine@git:20260823.81b104bPins git:20260823.81b104b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- magnus919/agent-skills
- Path
ascii-city-engine/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260823.81b104b, committed Aug 23, 2026
- First version recorded
- Aug 16, 2026
- Size
- 4,411 bytes
- Repository stars
- 166
- License
- MIT
Build portable, first-person colored ASCII city engines and small GIS-derived city packs. Use when designing terrain-following walking, raycast character rendering, city-provider schemas, or reproducible public-GIS ingestion. Do not use for conventional 3D/WebGL games, multi-level interiors, general GIS analysis, or committing full-resolution GIS archives.
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
# ASCII City Engine Build a portable city experience in three layers: an engine, a city-provider contract, and a city pack. Keep city-specific facts out of engine code. ## Workflow 1. Define the pack boundary and local meter-based CRS. 2. Acquire elevation, building, and road/path data from public sources. 3. Verify downloads, licenses, units, and provenance before conversion. 4. Reproject all geometry to local meters and emit the manifest plus world tiles. 5. Validate the pack offline: ```sh python3 scripts/validate-city-pack.py path/to/city-pack ``` 6. Load the pack's first tile in `assets/ascii-city-engine.html` and test movement, grade following, and solid footprints. 7. Record data limitations and human acceptance evidence. ## Required invariants - Compute `feet_z` from terrain and `eye_z` from feet plus eye height. - Reject null terrain, over-steep steps, and movement touching a solid footprint. - Use deterministic building colors and clear missed rays every frame. - Treat v1 as one ground height per `(x, y)` column; reserve, but do not implement, a surface graph. - Keep the engine independent of any city, vendor, agent harness, or private infrastructure. …
Read the whole file at its exact version.
How to install
mdr add magnus919/agent-skills/ascii-city-engine@sha256:dc1a22de79980ef1The line at the top of this page pins the label git:20260823.81b104b, 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_xiyenseefdcmhc7k)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Aug 16, 2026 and Aug 23, 2026, about one every 7 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260823.81b104b latest | 2026-08-23 | 81b104b | 4,411 B | A | view · diff |
| git:20260816.b6a96eb | 2026-08-16 | b6a96eb | 2,885 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 (4411 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
magnus919/agent-skills · 166 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xiyenseefdcmhc7k GET https://markdownregistry.com/api/v1/resolve?ref=magnus919/agent-skills/ascii-city-engine GET https://markdownregistry.com/api/v1/blob/dc1a22de79980ef1e8ca972eac336f7a43dca90522c026f0e7eebfef33b64920
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.