Agent skill

Single Cell Annotation

by jaechang-hits in jaechang-hits/SciAgent-Skills

Best practices for single-cell RNA-seq cell type annotation including marker-based, reference-based, and automated classification approaches.

Custom licenceAuto-check passedResearch & Science

Install Single Cell Annotation

skills CLI
$ npx skills add jaechang-hits/SciAgent-Skills --skill single-cell-annotation -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install jaechang-hits/SciAgent-Skills single-cell-annotation --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/jaechang-hits/SciAgent-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/legacy/single-cell-annotation .claude/skills/single-cell-annotation && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
single-cell-annotation
GitHub stars
371
Used in
2 other repos
Token cost
~3.2k tokens
SKILL.md length
1,237 words
Files
1
Skills in repo
169
Repo updated
First seen
Licence
Custom licence

At a glance

Best practices for single-cell RNA-seq cell type annotation including marker-based, reference-based, and automated classification approaches.

  • Works in 7 steps: Manual Marker-Based Annotation → Automated Annotation → Reference-Based Label Transfer → …
  • Tasks that involve Bioinformatics
  • SKILL.md covers Metadata, Overview, Key Concepts and Decision Framework, plus 8 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Single Cell Annotation is an agent skill from jaechang-hits/SciAgent-Skills. Best practices for single-cell RNA-seq cell type annotation including marker-based, reference-based, and automated classification approaches.

Its SKILL.md is about 3.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Research & Science, covering Bioinformatics. The repository describes itself as: 197 bioinformatics & life science skills for Claude Code and AI agents — BixBench 92.0% accuracy. RNA-seq, single-cell, drug discovery, proteomics, and more. Powers OmicsHorizon.

When your agent uses it

  • Tasks that involve Bioinformatics

Example prompts

  • “/single-cell-annotation”

Requirements

  • Python 3

Workflow steps

7 steps, taken from the step headings in SKILL.md.

  1. Manual Marker-Based Annotation
  2. Automated Annotation
  3. Reference-Based Label Transfer
  4. Quality Control First
  5. Initial Marker-Based Assessment
  6. Use Automated Tools for Validation
  7. Reference-Based Refinement

What it can do on your machine

Read from SKILL.md and the folder at commit 82c862c. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are python).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • sc-best-practices.org
    • scanpy.readthedocs.io
    • celltypist.org
    • scarches.readthedocs.io
    • satijalab.org
    • panglaodb.se
    • bio-bigdata.hrbmu.edu.cn
    • humancellatlas.org

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Single Cell Annotation loads about 3.2k tokens when it runs. Until then it costs about 41 tokens; SKILL.md has 1,237 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~41
When it runs · the whole SKILL.md, loaded when a task matches
~3.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,237 words (~3,161 tokens).

“Short Description: Best practices for annotating cell types in single-cell RNA-seq data using marker-based, automated, and reference-based approaches.”

— opening of SKILL.md by jaechang-hits, Custom licence
name
single-cell-annotation
license
open

Read the full SKILL.md on GitHub

Files

Just SKILL.md in legacy/single-cell-annotation of jaechang-hits/SciAgent-Skills.

Open the folder on GitHubat commit 82c862c

Used in 2 other repositories

We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in jaechang-hits/SciAgent-Skills, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Single Cell Annotation next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Single Cell Annotation compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Single Cell Annotation this skilljaechang-hits/SciAgent-Skills3712 repos~3.2kAutomated safety check: PassCustom licence
Alphagenome Single Variant Analysisgoogle-deepmind/science-skills3.2k2 repos~3kAutomated safety check: NotesApache-2.0
13C Metabolic Flux AnalysisK-Dense-AI/scientific-agent-skills48k1 repos~3.2kAutomated safety check: PassMIT
Clinvar Databasegoogle-deepmind/science-skills3.2k2 repos~3.9kAutomated safety check: NotesApache-2.0
Metabolic Study Planneraiming-lab/AutoResearchClaw15k—~1.9kAutomated safety check: PassMIT
Dbsnp Databasegoogle-deepmind/science-skills3.2k2 repos~3.4kAutomated safety check: NotesApache-2.0

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Questions about Single Cell Annotation

What does Single Cell Annotation do?

Best practices for single-cell RNA-seq cell type annotation including marker-based, reference-based, and automated classification approaches. Single Cell Annotation is an agent skill from jaechang-hits/SciAgent-Skills. Best practices for single-cell RNA-seq cell type annotation including marker-based, reference-based, and automated classification approaches.

When should I use Single Cell Annotation?

Single Cell Annotation fits situations like: tasks that involve Bioinformatics.

How do I install Single Cell Annotation in Claude Code?

Run `npx skills add jaechang-hits/SciAgent-Skills --skill single-cell-annotation -a claude-code`. Or copy the skill folder (legacy/single-cell-annotation in jaechang-hits/SciAgent-Skills) into .claude/skills/single-cell-annotation in your project. Claude Code loads it when a task matches its description.

How do I install Single Cell Annotation in Codex?

Run `npx skills add jaechang-hits/SciAgent-Skills --skill single-cell-annotation -a codex`. Or copy the skill folder (legacy/single-cell-annotation in jaechang-hits/SciAgent-Skills) into .agents/skills/single-cell-annotation in your project. Codex loads it when a task matches its description.

Can I use Single Cell Annotation in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jaechang-hits/SciAgent-Skills --skill single-cell-annotation -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/single-cell-annotation, .gemini/skills/single-cell-annotation, .github/skills/single-cell-annotation and .opencode/skills/single-cell-annotation in your project.

What does Single Cell Annotation need to run?

SKILL.md names no scripts, command-line tools or credentials: Single Cell Annotation is instructions for the agent only. Our summary lists: Python 3.

Does Single Cell Annotation access the network?

SKILL.md names 8 domains. As links in the text: sc-best-practices.org, scanpy.readthedocs.io, celltypist.org, scarches.readthedocs.io, satijalab.org, panglaodb.se, bio-bigdata.hrbmu.edu.cn and humancellatlas.org. This is read from the text; nothing was executed.

Is Single Cell Annotation safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Single Cell Annotation use?

Single Cell Annotation has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Single Cell Annotation use?

About 3.2k tokens (SKILL.md is roughly 13k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Single Cell Annotation?

Skills that share tags, products or a category with Single Cell Annotation: Alphagenome Single Variant Analysis (google-deepmind/science-skills, 3.2k stars), 13C Metabolic Flux Analysis (K-Dense-AI/scientific-agent-skills, 48k stars), Clinvar Database (google-deepmind/science-skills, 3.2k stars) and Metabolic Study Planner (aiming-lab/AutoResearchClaw, 15k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Single Cell Annotation?

jaechang-hits (a GitHub user) maintains it in jaechang-hits/SciAgent-Skills, which has 371 GitHub stars. The repository holds 169 skills in this directory. The repository was last updated on September 29, 2026.

Source: jaechang-hits/SciAgent-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.