ncbi_sequence

ncbi_sequence is a skill for Claude Code, Codex from ai4protein/VenusFactory2. It costs 105 tokens per session (1,107 once invoked), scanned A, original, no licence file.

A tool guide for finding and working with biological DNA and protein sequences in NCBI, a major public database of biological information. It supports accession-based retrieval, sequence searches, BLAST comparisons, and DNA-to-protein translation.

In plain words
What is it for?
Use it to fetch FASTA sequences, find a gene's sequence in a species, run BLAST, or translate a coding DNA sequence into a protein sequence.
Why use it?
It removes the need to navigate NCBI manually for common sequence lookups and comparisons.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

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.

agentmods
npx agentmods add skills/ai4protein/venusfactory2/ncbi_sequence
Any agent
npx skills add ai4protein/VenusFactory2 --skill ncbi_sequence
Clone the repo
git clone --depth 1 https://github.com/ai4protein/VenusFactory2

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.

agentmods badge for ncbi_sequence

README.md
[![agentmods](https://agentmods.dev/badge/skills/ai4protein/venusfactory2/ncbi_sequence.svg)](https://agentmods.dev/skills/ai4protein/venusfactory2/ncbi_sequence)
Your own site
<a href="https://agentmods.dev/skills/ai4protein/venusfactory2/ncbi_sequence"><img src="https://agentmods.dev/badge/skills/ai4protein/venusfactory2/ncbi_sequence.svg" alt="Measured on agentmods" height="20"></a>
Per session 105 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,107 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00105 $0.01107
Opus 5 $0.00053 $0.00553
Sonnet 5 $0.00021 $0.00221
Haiku 4.5 $0.00011 $0.00111

Measured 6d ago against content hash cc594b97612c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

ncbi_sequence 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 6d 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.

src/agent/skills/ncbi_sequence/SKILL.md · 48 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 6d ago First seen · 48 lines · 105 tokens per session scan A cc594b97612c

Subscribe to this mod's changes

ncbi_sequence is a skill published in the GitHub repository ai4protein/VenusFactory2 (248 stars, last pushed 1mo ago), with no licence file. It adds 105 tokens to every session and 1,107 once invoked, about $0.0005 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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