Codecs

All four are pure Dart and work on the canonical model (types.dart). Guide: tutorial step 6.

DOCX

Type	Purpose	Key members
`DocxCodec`	Word import and export	`DocxCodec(elementRegistry:, resolveImageBytes:, contributions:, packageLimits:)`, `decode`, `decodeDocument(bytes, onProgress:)`, `decodeWithReport(bytes)`, `encode(document)`, `encodeWithReport(document)`, `encodeValidated(envelope)`, `inspectFidelity`, `canDecode`
`DocxDecodeResult`	Import outcome	`document`, `issues`, `receipts`, `sourcePagination`
`DocxEncodeResult`	Export outcome	`bytes`, `supportReport`
`DocxFidelityIssue`	One approximation or omission	`code`, `impact`, `partPath`, `message`
`DocxCodecContributionRegistry`	Element mappings	`.fixed([...])`, `.empty`
`DocxExportValidationEnvelope`	Pairs a state with its resolved layout for validated export	`state`, `generation`
`DocxDecodeProgress`, `DocxPackageLimits`, `DocumentCodec<T>`	Progress, limits, the codec interface

PDF

Type	Purpose	Key members
`ResolvedPdfPainter`	Paints the resolved pages into PDF bytes	`ResolvedPdfPainter(registry:, fontResourceTimeout:, imageResourceTimeout:)`, `paintValidated(envelope, resolveBytes:, resolveFontBytes:)`
`ResolvedPdfExportValidationEnvelope`	A state and its complete layout generation	`state`, `generation`, `validate()`
`ResolvedDocumentPrintService`	A print spool from the same lane	`preparePrintSpool(envelope)`
`PdfElementRegistry`, `createCorePdfElementRegistry(...)`, `pdfElementsOf(extensions)`	Element painters
`PdfFontBytesResolver`	`(family, {weight, italic})` to font bytes

Markdown

Type	Purpose	Key members
`MarkdownCodec`	CommonMark/GFM import and export	`decode(source, title:, dialect:, extensions:)`, `encode(document, dialect:, extensions:)`
`MarkdownDecodeResult`, `MarkdownEncodeResult`	Results with diagnostics	`document`, `source`
`MarkdownDialect`	`commonMark`, `gfm`
`MarkdownExtensionRegistry`	Element syntax	`.fromExtensions(extensions, fencedBlocks:, math:)`, `.none`
`MarkdownDiagnostic`, `MarkdownSourceMap`, `MarkdownTargetProfile`	Diagnostics, source mapping, export profile
`MarkdownFencedBlockExtension`, `MarkdownMathExtension`, `MarkdownBlockSyntaxExtension`, `MarkdownInlineFieldExtension`	Extension points

HTML

Type	Purpose	Key members
`HtmlCodec`	HTML import	`decode(html, title:, allowImages:, extensions:)`
`HtmlDecodeResult`	Result	`document`, `diagnostics`
`HtmlExtensionRegistry`	Element mappings	`.fromExtensions(extensions)`
`parseHtmlToBlocks`, `HtmlBlockElementExtension`, `HtmlInlineFieldExtension`	Lower-level parsing and extension points