flowio

flowio is a skill for Claude Code from K-Dense-AI/scientific-agent-skills. It costs 88 tokens per session (2,920 once invoked), scanned A, original, MIT.

A low-level reader and writer for Flow Cytometry Standard files, a common format for storing measurements from flow-cytometry experiments. It handles FCS versions 2.0, 3.0, and 3.1, their metadata, channels, and event data.

In plain words
What is it for?
Use it to inspect FCS metadata and channels, extract events into NumPy arrays, handle files with multiple datasets, export tables, and create FCS 3.1 files.
Why use it?
It makes it possible to inspect or convert cytometry files without treating file access as full biological analysis. It does not perform compensation, transformations, gating, clustering, or FlowJo workspace processing.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to inspect FCS metadata and channels, extract events into NumPy arrays, handle files with multiple datasets, export tables, and create FCS 3.1 files.

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Install with agentmods
npx agentmods add skills/k-dense-ai/scientific-agent-skills/flowio
About the project

Scientific Agent Skills is a collection of reusable procedures that give AI agents capabilities for scientific research across areas such as biology, chemistry, medicine, and drug discovery. It is used by researchers and by people building AI scientist workflows with compatible coding agents. The catalogue contains many of the project's skills and supporting instructions.

K-Dense-AI/scientific-agent-skills · 44,469 stars · on GitHub · arxiv.org

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 K-Dense-AI/scientific-agent-skills --skill flowio
Clone the repo
git clone --depth 1 https://github.com/K-Dense-AI/scientific-agent-skills

Made for: Claude Code.

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 flowio

README.md
[![agentmods](https://agentmods.dev/badge/skills/k-dense-ai/scientific-agent-skills/flowio/github.svg)](https://agentmods.dev/skills/k-dense-ai/scientific-agent-skills/flowio)
Your own site
<a href="https://agentmods.dev/skills/k-dense-ai/scientific-agent-skills/flowio"><img src="https://agentmods.dev/badge/skills/k-dense-ai/scientific-agent-skills/flowio/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 flowio

Your own site · 80×15
<a href="https://agentmods.dev/skills/k-dense-ai/scientific-agent-skills/flowio"><img src="https://agentmods.dev/badge/skills/k-dense-ai/scientific-agent-skills/flowio.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 88 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,920 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
  • Socket pass 9 Apr 2026
  • Snyk pass 9 Apr 2026
  • 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 $0.00088 $0.02920
Opus 5 $0.00044 $0.01460
Sonnet 5 $0.00018 $0.00584
Haiku 4.5 $0.00009 $0.00292

Measured 9d ago against content hash 69e87a334078, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

flowio 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 9d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/inspect_fcs.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/flowio/SKILL.md · 328 lines

How it starts

The opening of the file, as written. The whole thing — 328 lines — stays where its author put it; the contents beside it link to each section on GitHub.

FlowIO

Purpose

Use FlowIO as a lightweight, low-level reader and writer for Flow Cytometry Standard files. Examples in this skill target FlowIO 1.4.0, the current stable release verified on 2026-07-23.

FlowIO is appropriate for:

  • Reading FCS 2.0, 3.0, and 3.1 files
  • Inspecting HEADER, TEXT, ANALYSIS, and channel metadata
  • Retrieving event data as a two-dimensional NumPy array
  • Reading legacy files that contain multiple datasets
  • Writing list-mode, single-precision FCS 3.1 files
  • Preparing data for pandas, machine-learning, or downstream cytometry tools

FlowIO does not perform compensation, logicle/biexponential transforms, gating, clustering, or FlowJo workspace processing. Use FlowKit or another analysis package for those tasks.

Install

Create or activate a Python environment, then install the verified release:

uv pip install "flowio==1.4.0"

Confirm the runtime version:

uv run python -c "import flowio; print(flowio.__version__)"

FlowIO 1.4.0 supports Python 3.9 through 3.13 and depends on NumPy.

Operating Workflow

  1. Clarify the operation. Distinguish metadata inventory, event extraction, file repair, conversion, and downstream biological analysis.
  2. Inspect before loading events. Use only_text=True for metadata-only work, especially with large or unfamiliar files.
  3. Choose event semantics explicitly. Use as_array(preprocess=True) for gain/log/time scaling from FCS metadata, or preprocess=False for values as encoded in the DATA segment. Record the choice.
  4. Keep parsing strict by default. Do not automatically suppress offset errors. Relax checks only for a known vendor-format defect, and review the resulting event data.
  5. Treat metadata as potentially sensitive. FCS TEXT values can include sample, subject, operator, and instrument identifiers. Export only fields needed for the task.
  6. Validate writes by reopening them. Check event/channel counts, labels, metadata, and representative values after any FCS export.

Read the full file on GitHub · 328 lines

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago Changed · +17 lines 69e87a334078
  2. 13d ago First seen · 311 lines · 88 tokens per session scan A 2b92a5e59edd

Subscribe to this mod's changes

flowio is a skill published in the GitHub repository K-Dense-AI/scientific-agent-skills (44,469 stars, last pushed today), licensed MIT. It adds 88 tokens to every session and 2,920 once invoked, about $0.0004 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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