eval

eval is a command for Claude Code from nextflow-io/agent-skills. It costs 7 tokens per session (281 once invoked), scanned A, original, Apache-2.0.

A command for evaluating the migrate-nextflow-code skill on a real Nextflow pipeline. Nextflow is a tool for running reproducible data and scientific workflows.

In plain words
What is it for?
Use it to evaluate strict-syntax, topic-channel, static-typing, or workflow-output migrations against a pipeline from a GitHub repository.
Why use it?
It provides a defined way to test whether a requested pipeline migration works in practice and to report where the process stops.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions subagents; positional $N argument.

Part of the nextflow plugin — 5 skills, 1 command, 1 MCP server shipped together

Good fit Use it to evaluate strict-syntax, topic-channel, static-typing, or workflow-output migrations against a pipeline from a GitHub repository.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/nextflow-io/agent-skills/eval
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.

Clone the repo
git clone --depth 1 https://github.com/nextflow-io/agent-skills

Made for: Claude Code.

Or install nextflow, the plugin that ships this one along with the rest of its 5 skills, 1 command, 1 MCP server.

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 eval

README.md
[![agentmods](https://agentmods.dev/badge/commands/nextflow-io/agent-skills/eval/github.svg)](https://agentmods.dev/commands/nextflow-io/agent-skills/eval)
Your own site
<a href="https://agentmods.dev/commands/nextflow-io/agent-skills/eval"><img src="https://agentmods.dev/badge/commands/nextflow-io/agent-skills/eval/github.svg" alt="Measured on agentmods" height="20"></a>

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.

agentmods 80×15 button for eval

Your own site · 80×15
<a href="https://agentmods.dev/commands/nextflow-io/agent-skills/eval"><img src="https://agentmods.dev/badge/commands/nextflow-io/agent-skills/eval.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 7 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 281 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 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 $0.00007 $0.00281
Opus 5.5 $0.00003 $0.00112
Sonnet 5.5 $0.00001 $0.00056
Haiku 4.5 $0.00001 $0.00028

Measured 16d ago against content hash 08a70b8f2576, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

eval 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 16d 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.

.claude/commands/eval.md · 21 lines

What it actually says

Clone a Nextflow pipeline. Have a subagent migrate it using the /migrate-nextflow-code skill and report back on its experience with the skill.

Arguments:

  • $1 — GitHub URL of the pipeline to migrate (required)
  • $2 — branch to check out (optional)
  • $3 — description of the migration to perform (required)

Procedure:

  1. Clone the pipeline repository into the evals directory as evals/<name>-<NNN>, where NNN is zero-padded increment to distinguish between repeated runs on the same pipeline. If a branch is not given, use the dev branch if the project has one, otherwise the default branch.

  2. Prompt a subagent with the repo, the skill, and the migration to perform.

  3. Have the agent report on its experience using the skill: how the migration went, what external resources it used, what worked or didn't work, etc. The agent should write a detailed REPORT.md to the repository, with inline code snippets as needed to explain issues. Offer to ask the agent follow-up questions if you have the tools to do so.

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. 16d ago Changed · -6 lines 08a70b8f2576
  2. 2mo ago First seen · 27 lines · 7 tokens per session scan A 6347ac490f39

Subscribe to this mod's changes

eval is a command published in the GitHub repository nextflow-io/agent-skills (25 stars, last pushed yesterday), licensed Apache-2.0. It adds 7 tokens to every session and 281 once invoked, about $0.0000 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 2026-08-30.