gen-scene SKILL.md skillA
gen-scene from partcad/partcad is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add partcad/partcad/gen-scene@git:20261106.8c298cbPins git:20261106.8c298cb in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- partcad/partcad
- Path
ai-agents/common/skills/gen-scene/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261106.8c298cb, committed Nov 6, 2026
- Size
- 33,858 bytes
- Repository stars
- 528
- License
- Apache-2.0
Generate a PartCAD scene - a placed arrangement of objects such as a room, a building inside or out, a workcell, a desk laid out, an outdoor or underwater setting, or a world for a simulation - from a description. It gives the scene a bottom surface at or above z = 0 (none, and no gravity, in space), models each object as a `basic` primitive unless more detail is called for, places everything with `location:` and fixes it to the world unless it is mobile, stands a building's inside on floor…
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
# pc:gen-scene Generate a PartCAD **scene**: a placed arrangement of objects, such as a living room, a house in its garden, a workcell, a table with things laid out on it, or a world for a simulation. The text after the command (`$ARGUMENTS`) is the description. *You* author the scene, and the parts it places, and prove the whole of it **passes `pc test`**. A scene uses the same ASSY file format as an assembly, and most of `/pc:gen-assembly` carries over. What changes is the intent: a scene says *where things are*, not how anything was put together. The rules below follow from that. **What a scene has to get right** is its surfaces: those seen from where the scene is looked at, and those the objects placed in it rest on, stand against or move through. It also has to get its physical conditions right: what is fixed and what is free, the gravity, the medium. It does not have to be right *inside*. A volume nothing sees or touches may be overlapping, rough or not manufacturable, and the effort goes into the surfaces instead. ## 1. Scene or assembly? | | Assembly | Scene | |---|---|---| | What it is | a product somebody put together | an arrangement: where things are | …
Read the whole file at its exact version.
How to install
mdr add partcad/partcad/gen-scene@sha256:28283609563c6b5aThe line at the top of this page pins the label git:20261106.8c298cb, 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_2uyecep7eaiy7sgq)
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Versions
The registry has recorded 1 version of this file, committed on Nov 6, 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 (33858 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
partcad/partcad · 528 stars · license Apache-2.0 · pushed 2026-11-08 · branch devel
API
GET https://markdownregistry.com/api/v1/artifacts/art_2uyecep7eaiy7sgq GET https://markdownregistry.com/api/v1/resolve?ref=partcad/partcad/gen-scene GET https://markdownregistry.com/api/v1/blob/28283609563c6b5a932d9d9b04a31158d374291cfc709214eca5b3419b46ceb6
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.