fetchngs

Fetch sequencing metadata and FastQ files from accession lists.

1|Updated Jun 19, 2026
One-click install
npx skills add https://github.com/danilomonge/nf-claw --skill fetchngs
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: fetchngs
Source: https://github.com/danilomonge/nf-claw/tree/main/pipelines/fetchngs
Command: npx skills add https://github.com/danilomonge/nf-claw --skill fetchngs

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

fetchngs removes the manual overhead of turning public sequencing accessions into downloadable metadata and raw FastQ files, while keeping runs reproducible and schema-validated.

Core Features & Use Cases

  • Accession-driven retrieval: Download data for SRA, ENA, DDBJ, GEO, and related public identifiers from a single input list.
  • Reproducible pipeline runs: Run pinned nf-core/fetchngs releases with Nextflow-aware version control and recorded provenance.
  • Downstream-ready outputs: Generate cleaned output directories, pipeline reports, and optional samplesheets for supported nf-core pipelines.
  • Use Case: A researcher has a list of accessions and wants one command to collect metadata, FastQ files, and run logs without guessing parameters.

Quick Start

Ask the fetchngs skill to process your accession list into an output directory using the desired profile, and specify a pipeline version only when you need a non-latest release.

Frequently Asked Questions about fetchngs

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I download FASTQ files from SRA and GEO accession lists?

You can bulk download FASTQ files from SRA, ENA, DDBJ, and GEO by supplying a validated input accession list and an output directory, which automatically retrieves raw data and associated metadata.

Can I generate a samplesheet for nf-core pipelines from public sequencing data?

Yes, you can generate a samplesheet for nf-core pipelines from public sequencing data. The skill creates optional samplesheets during the retrieval process to prepare outputs for downstream nf-core analysis workflows.

Does fetchngs support ENA and DDBJ database identifiers for raw data retrieval?

Yes, fetchngs supports ENA and DDBJ database identifiers for raw data retrieval. It processes SRA, ENA, DDBJ, and GEO accession numbers from your input list to fetch the corresponding FastQ files and metadata.

How do I pin an nf-core pipeline version to ensure reproducible sequencing downloads?

To pin an nf-core pipeline version for reproducible sequencing downloads, you specify the desired pipeline release version when initiating the run. This applies Nextflow-aware version control and records run provenance with schema-checked parameters.

What is the best way to retrieve public sequencing metadata with provenance tracking?

The best way to retrieve public sequencing metadata with provenance tracking is using a schema-validated pipeline that pins Nextflow versions and records run logs. This approach removes manual overhead while keeping runs fully reproducible.

Do I need a specific input file format to fetch raw FastQ data from accession numbers?

Yes, you need a validated input file containing the accession numbers to fetch raw FastQ data. The input list is processed alongside a specified output directory to properly retrieve and organize the sequencing files and metadata.