alterlab-rnaseq-quant

alterlab-rnaseq-quant is a skill for Claude Code from AlterLab-IEU/AlterLab-Academic-Skills. It costs 214 tokens per session (3,553 once invoked), scanned A, original, MIT.

A bioinformatics workflow that measures how much of each RNA transcript appears in bulk RNA sequencing data. It uses salmon or kallisto to turn raw FASTQ reads into transcript and gene abundance estimates.

In plain words
What is it for?
Use it to quantify bulk RNA-seq FASTQ files, build a decoy-aware reference index, produce transcript counts and TPM values, and create a gene-level matrix for DESeq2-style analysis.
Why use it?
It removes the manual work of building a reference index, quantifying each sample, and combining transcript results into a gene-level count table. That table can then be passed to differential-expression analysis, which finds genes that differ between conditions.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the alterlab-bioinformatics plugin — 38 skills shipped together

Good fit Use it to quantify bulk RNA-seq FASTQ files, build a decoy-aware reference index, produce transcript counts and TPM values, and create a gene-level matrix for DESeq2-style analysis.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/alterlab-ieu/alterlab-academic-skills/alterlab-rnaseq-quant
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 AlterLab-IEU/AlterLab-Academic-Skills --skill alterlab-rnaseq-quant
Clone the repo
git clone --depth 1 https://github.com/AlterLab-IEU/AlterLab-Academic-Skills

Made for: Claude Code.

Or install alterlab-bioinformatics, the plugin that ships this one along with the rest of its 38 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 alterlab-rnaseq-quant

README.md
[![agentmods](https://agentmods.dev/badge/skills/alterlab-ieu/alterlab-academic-skills/alterlab-rnaseq-quant/github.svg)](https://agentmods.dev/skills/alterlab-ieu/alterlab-academic-skills/alterlab-rnaseq-quant)
Your own site
<a href="https://agentmods.dev/skills/alterlab-ieu/alterlab-academic-skills/alterlab-rnaseq-quant"><img src="https://agentmods.dev/badge/skills/alterlab-ieu/alterlab-academic-skills/alterlab-rnaseq-quant/github.svg" alt="Measured on agentmods" height="20"></a>

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agentmods 80×15 button for alterlab-rnaseq-quant

Your own site · 80×15
<a href="https://agentmods.dev/skills/alterlab-ieu/alterlab-academic-skills/alterlab-rnaseq-quant"><img src="https://agentmods.dev/badge/skills/alterlab-ieu/alterlab-academic-skills/alterlab-rnaseq-quant.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 214 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,553 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 $0.00214 $0.03553
Opus 5 $0.00107 $0.01776
Sonnet 5 $0.00043 $0.00711
Haiku 4.5 $0.00021 $0.00355

Measured 11d ago against content hash 765f40d3631e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

alterlab-rnaseq-quant 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 11d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/build_tx2gene.py, scripts/import_quant.py, scripts/make_decoys.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/bioinformatics/alterlab-rnaseq-quant/SKILL.md · 271 lines

How it starts

The opening of the file, as written. The whole thing — 271 lines — stays where its author put it; the contents beside it link to each section on GitHub.

RNA-seq Quantification — salmon & kallisto Transcript Abundance

The command-line quantification entry point for bulk RNA-seq: take raw FASTQ reads plus a reference transcriptome and produce transcript-level abundance estimates (counts + TPM) with salmon (selective alignment) or kallisto (pseudoalignment via kb-python), then aggregate to the gene level with tximport/tximeta and hand off to alterlab-pydeseq2 for differential expression. It is the raw-data-to-count-matrix pipeline that the repo's Python analysis skills assume already ran.

Quick Start

Quantify these RNA-seq FASTQs with salmon and a decoy-aware index
Build a salmon gentrome index from this transcriptome + genome
Run kallisto / kb count on my paired-end reads
Turn my salmon quant.sf files into a gene-level count matrix for DESeq2

→ Build a decoy-aware index once, run salmon quant (or kb count) per sample, then run scripts/build_tx2gene.py + scripts/import_quant.py to make the tximport gene matrix and route it to alterlab-pydeseq2.


When to Use This Skill

Use this skill when the request is about getting from FASTQ to transcript or gene abundance with a lightweight quantifier:

  • "Quantify my RNA-seq with salmon / kallisto."
  • "Build a decoy-aware salmon index (gentrome + decoys.txt)."
  • "Run selective alignment with --validateMappings --gcBias."
  • "I have quant.sf files — make me a gene-level count matrix for DESeq2."
  • "Set up tximport / tximeta with a tx2gene map."
  • "Use kb-python / kb count to pseudoalign these reads."

Does NOT Trigger — route these to the right sibling

The request is really about… Route to
Differential expression on a count matrix (DESeq2 Wald tests, FDR, volcano) alterlab-pydeseq2
Single-cell RNA-seq quantification (was salmon alevin) piscem + alevin-fry — see references/single_cell_alevin.md; downstream → alterlab-scanpy / alterlab-scvi-tools
FASTQ-to-VCF germline/somatic variant calling alterlab-nf-core-sarek
16S/ITS amplicon (microbiome) FASTQ-to-feature-table alterlab-qiime2-amplicon
Spatial transcriptomics (Visium/Xenium) neighborhood analysis alterlab-squidpy-spatial
Loading/manipulating the resulting matrix as an AnnData object alterlab-anndata
BLAST/DIAMOND sequence similarity search alterlab-blast
Quick gene/transcript ID lookups & reference fetch (Ensembl/RefSeq) alterlab-gget
Aligned BAM manipulation, coverage, read counting from alignments alterlab-pysam

Read the full file on GitHub · 271 lines

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. 11d ago First seen · 271 lines · 214 tokens per session scan A 765f40d3631e

Subscribe to this mod's changes

alterlab-rnaseq-quant is a skill published in the GitHub repository AlterLab-IEU/AlterLab-Academic-Skills (66 stars, last pushed 6d ago), licensed MIT. It adds 214 tokens to every session and 3,553 once invoked, about $0.0011 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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