@sirdaspdf/core (library)

The runtime-agnostic engine behind the web app, the CLI and the MCP server. Depends only on pdf-lib and fflate; the PDF.js part receives an already-opened document so it runs the same in a browser (PDF.js worker build) and in Node (pdfjs-dist/legacy/build/pdf.mjs, no canvas needed).

import { anonymize, pdfToMarkdown, estimateTokens, parseRanges, mergePdfs, splitPdf, pageCount, organizePdf, compressLossless, classifyError } from "@sirdaspdf/core";
import * as pdfjs from "pdfjs-dist/legacy/build/pdf.mjs";   // Node

const doc = await pdfjs.getDocument({ data: bytes, isEvalSupported: false, verbosity: 0 }).promise;
const markdown = await pdfToMarkdown(doc);      // layout-aware Markdown
await doc.destroy();

const { text, findings } = anonymize(markdown); // consistent placeholders
console.log(estimateTokens(text), findings.length);

Subpath imports keep bundles small: @sirdaspdf/core/<module> for any module (anonymize, formats, extract, classify, segment, forms, chunk, ranges…).

Exports

Function	Purpose
`pdfToMarkdown(doc, onProgress?)`	Full pipeline: `extractLines` → `linesToMarkdown`.
`extractLines(doc, onProgress?)` / `linesToMarkdown(lines)`	The two halves, if you want to post-process lines.
`anonymize(text)`	`{ text, findings: { type, value, label }[] }`.
`estimateTokens(text)`	~4 characters per token.
`parseRanges("1-3, 5, 8-end", pageCount)`	0-based page groups; throws a user-facing error on bad input.
`mergePdfs(buffers)` · `splitPdf(buffer, groups)` · `pageCount(buffer)` · `organizePdf(buffer, edits)` · `compressLossless(buffer)`	pdf-lib operations returning `Uint8Array`.
`classifyError(err)` → `"encrypted" \| "corrupt" \| "generic"` · `PdfError`	Turn pdf-lib / PDF.js failures into actionable causes.
`convertToMarkdown(bytes, filename)` · `detectFormat` · `htmlToMarkdown` · `parseDelimited`	DOCX, XLSX, PPTX, ODT/ODS/ODP, EPUB, HTML, CSV, EML, RTF, JSON → `{ format, markdown, parts, tables, warnings }`.
`classifyDocument(text)` · `extractFields(markdown, type)`	Document type with visible signals; fields with `page` and `evidence`.
`chunkForAgents(markdown, maxTokens)` · `contentId(text)`	Chunks with stable `id`, `pages`, `section`. Use `pdfToMarkdown(doc, _, { pageMarkers: true })`.
`locateText(lines, text, page?)`	Bounding box (0–1, top-left origin) of a citation across up to three lines.
`segmentPages(pageTexts)`	Documents inside a batch PDF, with the reasons for each cut.
`readFormFields(bytes)` · `findTextCheckboxes(text)`	AcroForm fields and written checkboxes.
`buildRecords` · `toJsonl` · `datasetCard` · `DATASET_FORMATS`	Training/RAG datasets and the Hugging Face card.
`protectPdf` · `unlockPdf` · `lockState`	AES-256 via an injected qpdf WebAssembly module.
`deletePages` · `extractPages` · `rotatePages` · `addPageNumbers` · `addWatermark`	Page tools.

ESM, TypeScript types included. Node ≥ 20 or any modern browser.

#Exports

Exports