Turn a database schema into a Mermaid erDiagram. Accepts SQL DDL, Prisma, Drizzle, TypeORM, or SQLAlchemy — pass a file path or the text directly. Returns the Mermaid source plus a ```mermaid fenced block you can paste straight into markdown.

Generate a Mermaid ERD from a schema and WRITE it to disk so it can be embedded directly in a document with no copy-paste. Writes out_path (.mmd), a sibling .md with the fenced block, and a self-contained .html preview.

Check whether an ERD embedded in a doc (a .mmd file or a markdown file with a ```mermaid erDiagram block) still matches the current schema. Reports tables/columns/relations added or removed since the diagram was written. Use this in CI or before shipping docs.

Turn a workflow spec into a Mermaid flowchart. Accepts a tiny text DSL (a -> b, a -> b : label, chains, ? decisions, start/end) or a JSON array of steps. Returns the Mermaid source + a ```mermaid fenced block.

Generate a Mermaid flowchart from a workflow spec and WRITE it to disk (.mmd + embeddable .md + .html preview). Same as render_erd but for workflows/pipelines.