Flyfish Viewer documents what is fully rendered, what is structurally inspected, and which formats need specialist engines for perfect fidelity.
## High-confidence Preview Lines - PDF, OFD, images, audio, video, Markdown, source code, text, JSON/YAML/TOML/XML/SQL, archives, email, EPUB, Mermaid, Excalidraw, draw.io, and common Office/OpenDocument files. - CAD preview is powered by `@flyfish-dev/cad-viewer` through `@file-viewer/renderer-cad`; DWG, DXF, DWF, and DWFx assets stay self-hostable. - Word preview uses `@file-viewer/renderer-word` and the self-maintained `@file-viewer/docx` path for readable stream-style DOCX rendering. - Presentation preview uses `@file-viewer/renderer-presentation` and the standalone `@file-viewer/pptx` engine. ## Structure-first Lines Some engineering formats are intentionally conservative: | Format family | Current behavior | | --- | --- | | OLB / DRA | Safe structure preview for common OrCAD / Allegro containers and readable metadata | | OAS / OASIS | Readable fixtures render; complex binary OASIS stays structure-index focused until the dedicated layout kernel matures | | STEP / IGES / IFC / 3DM / BREP | Signature detection and conversion guidance, with visual support delegated to dedicated WASM engines | | PlantUML | Offline source/SVG-style preview by default; configure an intranet PlantUML service for full server-rendered SVG | ## Verification Use the built-in checks when the format matrix changes: ```bash pnpm verify:format-support pnpm verify:smoke-matrix pnpm verify:renderer-assets ```