Parse error
The source could not be parsed. Preserve the source and point to the line/column when available.
The source is not valid Mermaid for any known family, so it never became a diagram. Preserve the original text and surface the parser’s line/column; fix the offending line, or return the failure untouched rather than guessing a rewrite that changes intent.
Often pairs with UNSUPPORTED_SYNTAX when syntax parses in mermaid.js but not the structured model.
am verify diagram.mmd --jsonReturn the structured error to the caller when a safe automatic fix is not obvious.
Machine-readable: this page as Markdown.
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