---
title: "FlowIO - Air Market"
description: "Cytometry files arrive as a format you cannot just open and read. This lets you look at the metadata and channels, get the events into arrays, and write files back out. Reach for it for the low-level…"
canonical: "https://airmarket.ai/app/flowio"
---

[Air Market](/) / [Data & Analytics](/category/data) / FlowIO

Skill by [K-Dense](/@k-dense-ai)

# FlowIO

Open a cytometry file and see exactly what is inside

## What this does

Cytometry files arrive as a format you cannot just open and read. This lets you look at the metadata and channels, get the events into arrays, and write files back out. Reach for it for the low-level reading and writing; a different tool handles compensation, transforms and gating.

### Top 3 things it does for you

- Inspect FCS metadata and channels
- Pull events out into NumPy arrays
- Handle files holding several datasets

## Information

**FlowIO at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [K-Dense](/@k-dense-ai) |
| Category | [Data & Analytics](/category/data) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Version | 2.0 |
| Size | 71 KB |
| Licence | MIT |
| Repository | [k-dense-ai/scientific-agent-skills](https://github.com/k-dense-ai/scientific-agent-skills/tree/81e316bc89f7fda176b092d2bceb959204710b0a/skills/flowio) |
| GitHub stars | 34,239 (as of Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of FlowIO and flagged nothing. AIR's verdict: **safe**.

**What FlowIO's check was run against**

|  |  |
| --- | --- |
| Commit | 81e316bc89f7fda176b092d2bceb959204710b0a |
| Content hash | 79f088f1efc7aceec34b62b8d10fb9a29da787b055a75fd8c3590a5e6c3e4cb1 |
| Files read | [Browse the files at this exact commit](https://github.com/k-dense-ai/scientific-agent-skills/blob/81e316bc89f7fda176b092d2bceb959204710b0a/skills/flowio/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for FlowIO](/security/flowio)

## About FlowIO

This reads, inspects and writes Flow Cytometry Standard files in versions 2.0, 3.0 and 3.1 with FlowIO. It suits low-level FCS metadata and channel inspection, NumPy event extraction, multi-dataset files, table export, and FCS 3.1 creation.

For compensation, cytometry transforms, gating or FlowJo workspaces, use FlowKit instead.

## What's inside

- SKILL.md - instructions
- references/api_reference.md - reference
- references/fcs_semantics.md - reference
- references/sources.md - reference
- references/troubleshooting.md - reference
- references/workflows.md - reference
- scripts/inspect_fcs.py - script

## Questions

### Is FlowIO safe to install?

AIR scanned this exact version of FlowIO and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit 81e316bc89f7, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/flowio.

### How do I install FlowIO?

Open https://airmarket.ai/app/flowio on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/k-dense-ai/scientific-agent-skills/tree/81e316bc89f7fda176b092d2bceb959204710b0a/skills/flowio. Install from that link, not the branch.

## Related on Air Market

- [More Data & Analytics listings](/category/data)
- [Everything by K-Dense](/@k-dense-ai)

---

Canonical URL: <https://airmarket.ai/app/flowio>