cellxgene-census SKILL.md skillA
cellxgene-census from marielynneblock/arcanum-artifex is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add marielynneblock/arcanum-artifex/cellxgene-census@git:20260710.0115f49Pins git:20260710.0115f49 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- marielynneblock/arcanum-artifex
- Path
skills/scientific/cellxgene-census/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260710.0115f49, committed Jul 10, 2026
- First version recorded
- Apr 6, 2026
- Size
- 15,438 bytes
- Repository stars
- 4
- License
- none declared
Query the CELLxGENE Census (61M+ cells) programmatically. Use when you need expression data across tissues, diseases, or cell types from the largest curated single-cell atlas. Best for population-scale queries, reference atlas comparisons. For analysing your own data use scanpy or scvi-tools.
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
# CZ CELLxGENE Census ## Overview The CZ CELLxGENE Census provides programmatic access to a comprehensive, versioned collection of standardised single-cell genomics data from CZ CELLxGENE Discover. This skill enables efficient querying and analysis of millions of cells across thousands of datasets. The Census includes: - **61+ million cells** from human and mouse - **Standardised metadata** (cell types, tissues, diseases, donors) - **Raw gene expression** matrices - **Pre-calculated embeddings** and statistics - **Integration with PyTorch, scanpy, and other analysis tools** ## When to Use This Skill This skill should be used when: - Querying single-cell expression data by cell type, tissue, or disease - Exploring available single-cell datasets and metadata - Training machine learning models on single-cell data - Performing large-scale cross-dataset analyses - Integrating Census data with scanpy or other analysis frameworks - Computing statistics across millions of cells - Accessing pre-calculated embeddings or model predictions ## Installation and Setup Install the Census API: ```bash uv pip install cellxgene-census ``` …
Read the whole file at its exact version.
How to install
mdr add marielynneblock/arcanum-artifex/cellxgene-census@sha256:5ce1cd2bfc7545acThe line at the top of this page pins the label git:20260710.0115f49, 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_zaw2ceyn3wu5acgl)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Apr 6, 2026 and Jul 10, 2026, about one every 24 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260710.0115f49 latest | 2026-07-10 | 0115f49 | 15,438 B | A | view · diff |
| git:20260710.d1b3aa8 | 2026-07-10 | d1b3aa8 | 15,438 B | A | view · diff |
| git:20260710.ffb3400 | 2026-07-10 | ffb3400 | 15,438 B | A | view · diff |
| git:20260515.b861afb | 2026-05-15 | b861afb | 15,438 B | A | view · diff |
| git:20260406.05dff34 | 2026-04-06 | 05dff34 | 15,439 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 (15438 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
marielynneblock/arcanum-artifex · 4 stars · license none declared · pushed 2026-09-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_zaw2ceyn3wu5acgl GET https://markdownregistry.com/api/v1/resolve?ref=marielynneblock/arcanum-artifex/cellxgene-census GET https://markdownregistry.com/api/v1/blob/5ce1cd2bfc7545ac12abe1372a402507b86dcc6927645cb585384473a32719c4
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.
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