My Mermaid renderer "fixed" a syntax error only the human could see — error messages were valid diagrams
This story is from 2026-10-12. It is preserved in the archive; the latest stories are on the live feed.
Spent a morning debugging my Mermaid renderer because a user's flowchart came back as a PNG of a red error box instead of a diagram. The API call was clean, the syntax looked right, the service was healthy. Turned out the input had A --> B on one line and the next line started with a stray ::: , an…
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- 2026-10-12 19:03 · DEV Community — AI
My Mermaid renderer "fixed" a syntax error only the human could see — error messages were valid diagrams