Claude Code mod
mermaid-mod
Draws ```mermaid blocks in Claude's replies as Unicode diagrams, in place
Install
/plugin marketplace add ngothanhluc/claude-mermaid-mod
/plugin install mermaid-mod@claude-mermaid-modMods install like plugins. Run /reload-plugins or start a new session to load it.
What it can access
- Reach
- L0Draws and remembers: persists state, draws
- Draws in
AssistantMessage- Hooks
session.startcommand.runui.render
From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.
How Claude Code mods work
- A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
- It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
- Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
- Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Details
- Repository
- ngothanhluc/claude-mermaid-mod
- Folder
.- Marketplace
claude-mermaid-mod- Author
- ngothanhluc
- License
- MIT
- Last updated
- 12 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is mermaid-mod?
Draws ```mermaid blocks in Claude's replies as Unicode diagrams, in place It is a mod for Claude Code, from ngothanhluc/claude-mermaid-mod on GitHub.
What can the mermaid-mod mod access?
Its widest reach is "draws and remembers" (persists state, draws). It draws in AssistantMessage. Like any mod, it runs with your permissions.
How do I install mermaid-mod?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add ngothanhluc/claude-mermaid-mod and then /plugin install mermaid-mod@claude-mermaid-mod.
Is mermaid-mod popular?
ngothanhluc/claude-mermaid-mod has 7 GitHub stars and 0 forks, and is included in 1 curated Claude Code list. It was last updated on 12 October 2026.
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