agent-skills: Instructions file for Claude Code

AGENTS.md

agent-skills AGENTS.md is an instructions file for Claude Code, Codex, OpenCode from nextflow-io/agent-skills. It costs 1,045 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for a plugin containing reusable guides, called agent skills, for building and running Nextflow scientific data pipelines. They explain the repository layout, skill format, release rules, and validation tools.

In plain words
What is it for?
Use them when editing the plugin's skill documents, manifest, validation scripts, or migration evaluation workflow for Nextflow pipelines.
Why use it?
The repository mainly contains instruction files rather than application code, so normal software-project assumptions can lead to the wrong edits or checks. These instructions show how to change and validate the skills.

Instructions file for Claude CodeCodexOpenCode

Written for Claude Code and Codex and OpenCode: ${CLAUDE_PLUGIN_ROOT} variable, but also the file is AGENTS.md. Also seen: reads .claude/ paths; mentions .claude-plugin; mentions Claude Code.

This is nextflow-io/agent-skills's own configuration. It tells Claude Code, Codex and OpenCode how to work on agent-skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agent-skills configures →

Runs only inside a plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else, and the catalogue could not identify which plugin ships it.

Reuse

Borrowing it

Nothing to install: this file belongs to nextflow-io/agent-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/nextflow-io/agent-skills/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/nextflow-io/agent-skills

Made for: Claude Code, Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Per session 1,045 This file is loaded in full into every session.
When invoked 1,045 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.01045 $0.01045
Opus 5.5 $0.00418 $0.00418
Sonnet 5.5 $0.00209 $0.00209
Haiku 4.5 $0.00104 $0.00104

Measured 6d ago against content hash d16b09f1c3c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agent-skills AGENTS.md 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.

AGENTS.md · 50 lines

How it starts

The opening of the file, as written. The whole thing — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This file provides guidance to coding agents (Claude Code and other Agent Skills-compatible tools) when working with code in this repository.

What this repo is

A Claude Code plugin that bundles agent skills for building and running Nextflow pipelines with modules from the Nextflow Registry. There is no application code, build step, or test suite — the deliverable is the set of SKILL.md files, each a Markdown document with YAML frontmatter that instructs an agent how to perform a task.

Skills follow the Agent Skills specification so they work in any compatible agent (Claude Code, Codex, Cursor, OpenCode).

Layout

  • .claude/commands/ — repo-local dev tooling, not shipped to plugin users. eval.md (/eval <github-url> [branch] <description>) exercises a migrate-nextflow-code migration against a real pipeline and reports where the skill's instructions fall short.
  • .claude-plugin/plugin.json — plugin manifest (name, version, keywords). Bump version when releasing.
  • skills/<name>/SKILL.md — one skill per directory; the directory name must match the name: in frontmatter.
  • Skills may bundle resources: references/*.md (loaded on demand). Shared executable helpers live in the top-level scripts/, referenced from skills via ${CLAUDE_PLUGIN_ROOT}/scripts/....
  • .mcp.json — declares the Seqera MCP server, which allows the agent to interact with Seqera Platform.

The skills and how they relate

  • install-nextflow — installs/upgrades Nextflow and the Java 17+ prerequisite (via SDKMAN). Other skills require Nextflow 26.04+.
  • run-module — runs a single Registry module via nextflow module search/view/run. Self-contained (no MCP). Covers both process modules and workflow modules (Kind: Workflow).
  • create-workflow — composes multiple modules into a pipeline. Delegates to run-module (via the Skill tool) to validate each module before composing.
  • launch-workflow — launches pipelines on Seqera Platform for cloud/HPC execution. Requires the seqera MCP (mcp__seqera__* tools) — declared in allowed-tools.
  • migrate-nextflow-code — migrates pipeline code to newer language features.

Read the full file on GitHub · 50 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. 6d ago Changed · +41 tokens per session d16b09f1c3c2
  2. 12d ago First seen · 50 lines · 1,004 tokens per session scan A 3724a05474d2

Subscribe to this mod's changes

agent-skills AGENTS.md is an instructions file published in the GitHub repository nextflow-io/agent-skills (24 stars, last pushed 6d ago), licensed Apache-2.0. It adds 1,045 tokens to every session, about $0.0042 per session on Opus 5.5. 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 2026-10-08.

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