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Simon Willison

Mermaid to ASCII art (mermaid-ascii)

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Tool: Mermaid to ASCII art (mermaid-ascii) After building the Mermaid to ASCII tool based on Grok Build's Rust code I learned that there's an older, more fully-featured Go library called AlexanderGrooff/mermaid-ascii that implements a similar pattern, so I had Claude Fable 5 compile that one to WebAssembly as well so I could compare the two. This one includes support for colors! Tags: go, tools, webassembly, mermaid

Tool: Mermaid to ASCII art (mermaid-ascii)

After building the Mermaid to ASCII tool based on Grok Build's Rust code I learned that there's an older, more fully-featured Go library called AlexanderGrooff/mermaid-ascii that implements a similar pattern, so I had Claude Fable 5 compile that one to WebAssembly as well so I could compare the two.

This one includes support for colors!

Screenshot of a Mermaid diagram editor web app. A row of tab buttons reads: Flowchart, Multiple links, Subgraphs, Multi-line labels, Colors (selected, highlighted blue), Sequence, Alt fragment, Loop + note, Parallel. Below is a text input area containing: "graph LR / Build:::good --> Test:::good / Test --> Deploy:::warn / Deploy --> Rollback:::bad / classDef good color:#3fb950 / classDef warn color:#e3b341 / classDef bad color:#ff7b72". A control row shows an unchecked "ASCII only" checkbox, "Padding X: 5", "Padding Y: 5", "Box padding: 1", and buttons "Copy as text" and "Copy link to this diagram". At the bottom on a black background is the rendered left-to-right flowchart with four connected boxes: "Build" (green text), "Test" (green text), "Deploy" (yellow text), "Rollback" (red text), each linked by arrows.

Tags: go, tools, webassembly, mermaid