single-cell-foundation-model-geneformer

single-cell-foundation-model-geneformer is a skill for Claude Code, Codex from PharMolix/OpenBioMed. It costs 65 tokens per session (722 once invoked), scanned A, original, MIT.

A workflow guide for Geneformer, a research model that analyzes single-cell gene-expression data. It covers converting data into Geneformer's format, classification, embedding extraction, and simulated gene or treatment perturbations.

In plain words
What is it for?
Use it to tokenize scRNA-seq data, classify cells or genes, extract cell or gene representations, or study simulated perturbations.
Why use it?
It helps ensure the data has the fields Geneformer needs and that the correct workflow is chosen. This avoids confusing raw data preparation, model fine-tuning, and pretrained analysis.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to tokenize scRNA-seq data, classify cells or genes, extract cell or gene representations, or study simulated perturbations.

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Install with agentmods
npx agentmods add skills/pharmolix/openbiomed/single-cell-foundation-model-scrna-seq-geneformer
About the project

OpenBioMed is an agent platform and toolkit collection for biomedical research and drug discovery, covering areas such as molecular design, protein analysis, and single-cell data analysis. It is intended for researchers and provides the biomedical skills listed in the catalogue as workflows for Claude Code.

PharMolix/OpenBioMed · 1,105 stars · on GitHub

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add PharMolix/OpenBioMed --skill single-cell-foundation-model-scrna-seq-geneformer
Clone the repo
git clone --depth 1 https://github.com/PharMolix/OpenBioMed

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

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README.md
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Your own site
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Your own site · 80×15
<a href="https://agentmods.dev/skills/pharmolix/openbiomed/single-cell-foundation-model-scrna-seq-geneformer"><img src="https://agentmods.dev/badge/skills/pharmolix/openbiomed/single-cell-foundation-model-scrna-seq-geneformer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 722 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00065 $0.00722
Opus 5 $0.00032 $0.00361
Sonnet 5 $0.00013 $0.00144
Haiku 4.5 $0.00006 $0.00072

Measured 12d ago against content hash 759724804de4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

single-cell-foundation-model-geneformer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/single-cell-foundation-model-scrna-seq-geneformer/SKILL.md · 99 lines

How it starts

The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Geneformer

Use This Skill When

Use this skill when the task involves official Geneformer workflows such as:

  • converting raw scRNA-seq data into Geneformer tokenized datasets
  • fine-tuning Geneformer for cell or gene classification
  • extracting cell or gene embeddings
  • generating state embeddings for downstream perturbation analysis
  • running in silico perturbation or in silico treatment style analyses
  • distinguishing pretrained zero-shot usage from fine-tuned classifier usage

This skill is for Geneformer-specific workflows, not generic single-cell model use.

Start Here

  1. Confirm the input is raw-count scRNA-seq data and still suitable for tokenization.
  2. Check that ensembl_id and n_counts are available.
  3. Tokenize first unless the user already has a Geneformer .dataset.
  4. Decide whether the task is classification, embedding extraction, or in silico perturbation.

Choose A Path

Tokenization

Use TranscriptomeTokenizer first for almost every Geneformer workflow. This step converts raw-count .loom or .h5ad data into tokenized datasets used by the downstream APIs.

Geneformer expects:

  • row attribute ensembl_id
  • cell attribute n_counts

Optional metadata can be passed through during tokenization.

Classification

Use Classifier for:

  • cell state classification
  • cell type annotation
  • gene classification tasks

The input is a tokenized Geneformer .dataset object, not raw AnnData.

Embedding extraction

Use EmbExtractor when the task is to:

  • extract CLS, cell, or gene embeddings
  • plot or inspect cell embeddings
  • generate state embeddings for later perturbation analysis

In silico perturbation

Use InSilicoPerturber for zero-shot or model-based perturbation analyses such as:

  • deleting or shifting genes
  • modeling start and goal cell states
  • ranking perturbations by movement toward a desired cell state

This is one of Geneformer's defining workflows and should be treated as more than ordinary classifier inference.

Read the full file on GitHub · 99 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 99 lines · 65 tokens per session scan A 759724804de4

Subscribe to this mod's changes

single-cell-foundation-model-geneformer is a skill published in the GitHub repository PharMolix/OpenBioMed (1,105 stars, last pushed 1mo ago), licensed MIT. It adds 65 tokens to every session and 722 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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