anndata

anndata is a skill for Claude Code from jimmc414/Kosmos. It costs 67 tokens per session (2,745 once invoked), scanned A, original, no licence file.

A Python data format and toolkit for annotated data matrices, which store measurements together with information about samples, cells, or genes.

In plain words
What is it for?
Working with AnnData objects and h5ad files, handling experimental metadata, and processing single-cell RNA sequencing data.
Why use it?
It helps manage large biological datasets where the measurements and their metadata must stay linked, especially in single-cell analysis.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the scientific-skills plugin — 119 skills shipped together

Good fit Working with AnnData objects and h5ad files, handling experimental metadata, and processing single-cell RNA sequencing data.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jimmc414/kosmos/anndata
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 jimmc414/Kosmos --skill anndata
Clone the repo
git clone --depth 1 https://github.com/jimmc414/Kosmos

Made for: Claude Code.

Or install scientific-skills, the plugin that ships this one along with the rest of its 119 skills.

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.

agentmods badge for anndata

README.md
[![agentmods](https://agentmods.dev/badge/skills/jimmc414/kosmos/anndata.svg)](https://agentmods.dev/skills/jimmc414/kosmos/anndata)
Your own site
<a href="https://agentmods.dev/skills/jimmc414/kosmos/anndata"><img src="https://agentmods.dev/badge/skills/jimmc414/kosmos/anndata.svg" alt="Measured on agentmods" height="20"></a>
Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,745 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.
Origin unknown 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 $0.00067 $0.02745
Opus 5 $0.00034 $0.01373
Sonnet 5 $0.00013 $0.00549
Haiku 4.5 $0.00007 $0.00275

Measured 8d ago against content hash 70f40b01a184, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

anndata 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 8d 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.

kosmos-claude-scientific-skills/scientific-skills/anndata/SKILL.md · 395 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

5 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. 8d ago First seen · 395 lines · 67 tokens per session scan A 70f40b01a184

Subscribe to this mod's changes

anndata is a skill published in the GitHub repository jimmc414/Kosmos (579 stars, last pushed 5mo ago), with no licence file. It adds 67 tokens to every session and 2,745 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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