What is mermaid-draw?
mermaid-draw is a Claude Code mod by galElmalah that mermaid diagrams in Claude Code: every ```mermaid block Claude writes is drawn as box art, in colour, right where the fence was in the transcript. Needs function hooks (early access) and. It is listed under Interface and has 4 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | galElmalah |
| Repository | galElmalah/claude-mods |
| Popularity | 4 GitHub stars |
| Category | Interface |
| Security | Low risk (100/100) |
| Rank | #720 of 5,272 Claude Code mods; #266 in Interface |
| License | MIT |
| Last commit | 2026-10-10 |
| Hooks | 3 events |
| Sees | only the events it hooks |
| Draws on | AssistantMessage |
Is mermaid-draw safe to install?
mermaid-draw scores 100/100 on the MCPMods security check: Low risk. No checks raised a concern. It passed 8 of 8 checks.
Mod footprints come from claude plugin validate, which lists every event a mod hooks and every API call it makes without running it.
| Check | Result |
|---|---|
| No network access | Pass |
| Starts no processes | Pass |
| Writes no files or config | Pass |
| Doesn't read environment variables | Pass |
| Only sees the events it hooks | Pass |
| Doesn't drive Claude | Pass |
| Passes claude plugin validate | Pass |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.command.register | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.invalidate | draws interface |
$.ui.log | draws interface |
$.ui.resolve | draws interface |
How do I install mermaid-draw?
- Check your Claude Code version. Mods need Claude Code 2.1.287 or later and are on by default.
claude --version
- Read its footprint. This lists every event it hooks and every API call it makes, without running it.
git clone https://github.com/galElmalah/claude-mods claude plugin validate ./claude-mods/claude-mermaid
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add galElmalah/claude-mods && claude plugin install mermaid-draw@gal-mods
Or ask Claude to set it up
Paste this into Claude Code and it installs mermaid-draw for you:
Install the "mermaid-draw" Claude Code mod from https://github.com/galElmalah/claude-mods/tree/main/claude-mermaid. Run claude plugin validate on it first and show me what it can access before you enable it.
More from galElmalah/claude-mods
This repository has 2 Claude Code mods on MCPMods.
- prompt-queue: A prompt typed while Claude is working is held in a stack above the prompt instead of landing in the running turn, and s (Low risk)