---
title: "AI diagram generator for Slack: from thread to architecture diagram"
slug: "ai-diagram-generator-slack"
description: "Use an AI diagram generator inside Slack: describe an architecture, flow or sequence and get an editable Mermaid diagram in the thread, versioned on every change."
author: "Andrii"
published_at: "2026-09-24T00:00:00.000Z"
updated_at: "2026-09-24T00:00:00.000Z"
---

# AI diagram generator for Slack: from thread to architecture diagram

AI diagram generators are good at the first draft. The problem is everything after it: the diagram sits in a separate tab, the team keeps talking in Slack, and a week later the two disagree.

> **Direct answer:** Arialine is an AI diagram generator that works inside Slack. Mention `@arialine` with a description (or type `/arialine` and describe it), and it writes Mermaid, validates it and posts the diagram in the channel as a PNG and interactive HTML. Replies in the thread edit the same diagram, and each change is saved as a version linked to the message that asked for it.

## Generate a diagram from one sentence

```text
@arialine architecture diagram: web app and mobile app call an API gateway; the gateway routes to auth, catalog and orders services; orders writes to Postgres and publishes to a Kafka topic consumed by billing
```

Arialine picks a suitable Mermaid diagram type, writes the source, checks it with the renderer and posts it. Good prompts name the components, the direction of calls, and any failure paths. See [better prompts for Slack diagrams](/blog/better-prompts-for-slack-diagrams).

## Generate it from the discussion instead

If the design was just discussed in a thread, you don't need to retype it:

```text
@arialine turn this into a diagram
```

Arialine reads the relevant recent discussion in that conversation and asks which topic you mean when two are plausible. It only reads messages when you address it.

## Keep it correct as the thread continues

- "@arialine add a Redis cache in front of catalog" → version 2.
- "@arialine undo the last change" → version 3, same content as version 1; nothing is erased.
- **Brainstorm**: ask for alternatives and adopt one in place or as a branch.
- In proposal mode, changes wait for **Apply**, so a reviewer stays in control.

## Why generate diagrams as Mermaid

Mermaid is text, so the result is editable, diffable and exportable. You can paste your own Mermaid too; valid code renders without AI.

## What it generates well

Architecture and service maps, flowcharts, sequence diagrams, state machines, ER diagrams, Gantt timelines and C4 views. Always review AI output before relying on it.

## FAQ

### Is my Slack content used to train models?

Arialine does not use Slack content to train AI models. Requested features send the relevant instruction and context to configured AI providers; see the [Privacy Policy](/privacy).

### How many AI generations are included?

Free workspaces get 10 AI generations per day; Team has no cap. One request counts once, even if several model calls are needed.

### Can it generate from a whiteboard photo?

Describe the photo or use the [whiteboard photo to Mermaid workflow](/blog/whiteboard-photo-to-mermaid-workflow).