Why docgen

An agent can write a perfect invoice's HTML, a clean data table, or a filled-form field map as tokens — but it cannot emit bytes. docgen is the renderer that closes the gap: structured content in, a downloadable binary document out. It wraps no external API; the "service" is a bundled rendering stack (pdf-lib for PDF and form fill, exceljs for spreadsheets, marked for the markdown path). Every output is stored tenant-scoped with a short TTL and handed back as a stable resource URI plus inline base64 when small enough.

Tools

Four tools sharing one delivery shape — three renderers that write a stored document and one read that re-fetches by id. Every render/export/fill call returns a DocumentEnvelope (a documentId, a docgen://document/{id} resource URI, byte size, TTL, and inline base64 when the artifact is small enough); docgen_get_document returns the same envelope for an id you already hold.

docgen_render_pdf

Render content to a downloadable PDF.

• Provide exactly one source: { html } (raw HTML you compose — the recommended path), { markdown } (converted to HTML, then rendered), or { template, data } (a {{key}} template filled from a data object, with server-owned layout)
• pageOptions control size (A4 / Letter / Legal / A3 / A5, defau

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