AiBizzAppsandClaude Opus 5.5
a45c8a41de
* DOCX: keep a .docm's macros on save; write .docm/.dotx/.dotm content types Saving a .docm deleted its VBA project and wrote the plain-docx main content type under the .docm name, which Word rejects; .dotx was written as a document, and .dotm could be opened but not saved. io_ext sent every Word extension to wordcraft_docx::write, which always emitted a .docx package, and the reader never kept the VBA parts. - wordcraft_docx::Flavor (docx/docm/dotx/dotm) picks the main part's content type; write_as(doc, flavor) writes it, write() stays .docx. - The reader keeps word/vbaProject.bin (and the vbaData.xml it relates to) as opaque bytes in Document::passthrough, the mechanism custom.xml already uses. Macro content is never parsed or run. The writer emits them, with their relationships and content types, only for .docm/.dotm; a .docx/.dotx leaves them out cleanly (as Word does) and the open document still holds them for a later Save As .docm. - Empty projects, missing or malformed VBA data, duplicate or odd relationships never panic and never stop the document from opening; part sizes stay under the existing package limits. - .dotm joins the open/save lists, and saving to .docm/.dotx/.dotm binds the session to that file like .docx. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * DOCX: carry vbaData.xml as opaque bytes, never parse it The first cut gated word/vbaData.xml through xml::parse on read and on write. That parser rejects UTF-16 (a valid XML encoding), so a UTF-16 vbaData.xml was silently dropped and the saved .docm kept vbaProject.bin without its VBA data; and it is lenient (no end-name check, auto-closes at EOF), so malformed data passed the gate anyway. WordCraft is a passthrough for macro parts: it should emit exactly what the user's file had. Now vbaProject.bin and vbaData.xml are both carried byte for byte (bounded by the reader's existing size limits); only the relationship part is read, to find the VBA data. A relationship to a missing VBA data part keeps the project and writes no dangling link. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * DOCX: read UTF-16 XML parts instead of dropping them xml::parse rejected any part with a UTF-16 BOM, and Package::rels swallowed that error as "no relationships". A UTF-16 word/_rels/vbaProject.bin.rels (valid per OPC) therefore hid vbaData.xml, and saving the .docm dropped it and its relationship. parse now transcodes UTF-16 LE/BE with a BOM to UTF-8 (lossy, bounded at 1.5x, never panics on odd lengths or unpaired surrogates), so every part benefits. Unreadable relationship parts are now logged rather than silently treated as empty; the macro project is still kept. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * Web Save keeps the opened Word format (.docm stays .docm) Browser Save (file.save without a path) always downloaded <stem>.docx, so an opened .docm/.dotm was written as a plain .docx and lost its macros on an ordinary Save. Save and the Save As suggestion now default to the opened file's extension when it is a Word package (.docx/.docm/.dotx/.dotm, via engine io::is_word_package), else .docx. Macros are only dropped on an explicit conversion to a macro-free name. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * DOCX: carry every part a VBA project relates to, so signatures survive A signed .docm/.dotm lost its VBA signature on save: the reader kept only vbaProject.bin and vbaData.xml, and the writer rebuilt vbaProject.bin.rels with the wordVbaData relationship alone. Under a "signed macros only" policy the macros then stop running, although the project bytes (which the signature covers) were unchanged. Generalised instead of special-casing signature types: the reader now keeps every internal part vbaProject.bin.rels points to (VBA data, the legacy/Agile/V3 signatures, anything else) as opaque bytes, with its relationship type and its content type from [Content_Types].xml, in a small manifest in Document::passthrough. .docm/.dotm re-emit them all; .docx/.dotx still drop the whole VBA set. Bounded at 64 parts; targets outside word/, relationship parts, the project itself, missing parts and parts the writer produces itself are skipped, never shadowed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * DOCX: match VBA part names case-insensitively; keep colon names relative Two edge cases in carrying a VBA project's related parts: - The reader's word/ prefix check was case-sensitive, so a relationship to /WORD/vbaData.xml (the same part under OPC's case-insensitive part names, and found by Package::get) was skipped and lost on save. The directory is now matched case-insensitively and normalised to word/, the name the writer uses. - Stripping word/ from /word/sig:legacy.bin gave Target="sig:legacy.bin", which parses as a URI scheme rather than a package part. A target whose first segment has a colon is now written as "./sig:legacy.bin"; ordinary names keep the plain form Word already accepts. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
WordCraft
Writing and document design; an open-source, clean-room reimplementation of Microsoft Word, rebuilt in pure Rust.
A fast, open-source word processor with the Word workflow you already know: the ribbon, styles,
tables, track changes, references and mail merge. It reads and writes .docx, runs natively on
macOS, Windows, Linux and BSD, and in the browser via WebAssembly.
By the ArtCraft team.
WordCraft on getartcraft.com · ArtCraft · All Crafting Apps
The Open Studio Handbook, WordCraft's built-in sample: the ribbon, live Styles gallery, rulers and the Navigation pane.
Note
ArtCraft is a community of artists from all walks of life. Painters, photographers, filmmakers, illustrators, designers, animators, hobbyists, and people who picked up a pencil last week. If you make things, you're one of us. Come say hi on Discord.
A tour · Why WordCraft · What works today · Quick start · For agents · Architecture · Roadmap · Downloads · The Crafting Apps · License and credits
A tour
Every screenshot below is WordCraft itself, rendered offscreen by its own UI test harness
(cargo run -p wordcraft-ui-egui --example ui_shot).
 Review. Track changes, comment balloons in the margin, accept and reject, spelling and grammar as you type. |
 References. Tables of contents, footnotes, citations in APA, MLA, Chicago or IEEE, index and captions. |
 Design. Themes, style sets, paragraph spacing, watermarks, page colour and borders. |
 Dark mode with formatting marks, and the Insert tab: tables, pictures, shapes, links, headers, footers, fields and symbols. |
 Layout. Drop caps, text wrapping around pictures and shapes, automatic hyphenation, line numbers and page borders. |
|
 File. Start from a template, open recent documents, edit properties, export to PDF and other formats. |
|
Why WordCraft
- Familiar. Word's ribbon tabs, groups, shortcuts and behaviour: Enter continues a list, Tab demotes it, Ctrl/⌘+B bolds the word under the caret, the Styles gallery previews styles live, F4 repeats, F7 checks spelling, F8 extends the selection.
- Your files. Opens and saves .docx (OOXML), and also .odt, .rtf, .html, .md, .txt; exports PDF with real, selectable text, links and bookmarks.
- Fast. Paragraph layout is cached, so typing in a 188-page document re-lays it out in about 1.4 ms; pages render on demand.
- Everywhere. One Rust codebase for macOS, Windows, Linux, BSD and the web. No Electron, no Tauri: native egui on the GPU.
- Built for agents. Every action is a command with an id. The same 389 commands drive the ribbon, keyboard shortcuts, the command search, a command-line tool, a JSON control channel and an MCP server.
- Private. Spelling, grammar and everything else work offline.
- Open. MIT OR Apache-2.0. Clean-room: built from public specifications and observation, with every asset original or openly licensed.
What works today
| Area | Highlights |
|---|---|
| Writing | Fast typing with IME, smart quotes, AutoCorrect, list autoformat (* , 1. ), dashes; word, sentence, paragraph selection; drag-select; clipboard with formatting; undo/redo; find and replace with regex |
| Formatting | Fonts, sizes, bold/italic/underline styles, strike, sub/superscript, caps, highlight, colours, character spacing, Format Painter, Change Case, Clear Formatting |
| Paragraphs | Alignment, indents (draggable on the ruler), spacing, line spacing, tabs with leaders, borders, shading, keep with next, widow/orphan control |
| Styles | Built-in style set, live gallery, Styles pane, create/modify/update styles, style sets, themes |
| Lists | Bullets, numbering, multilevel, restart, set value, custom formats |
| Tables | Insert by grid, merge/split, styles with banded rows, borders, shading, header rows repeated across pages, rows that split across pages, sort, formulas, text ↔ table |
| Pages | Margins, orientation, size, columns, page/column/section breaks, headers and footers (first page, odd/even), page numbers, watermark, page borders, line numbers, vertical alignment, drop caps, automatic hyphenation |
| Objects | Pictures (resize, crop, recolour, brightness/contrast, transparency, background removal, picture styles, rotate), shapes, text boxes, floating position with text wrapping (square, top and bottom, behind or in front of text) |
| References | Table of contents, footnotes and endnotes, citations and bibliography (APA, MLA, Chicago, IEEE), captions, table of figures, cross-references, index, table of authorities |
| Review | Spelling and grammar with suggestions, thesaurus, word count, comments in margin balloons or a pane, track changes, accept/reject, compare documents, restrict editing, accessibility checker, document inspector |
| Mailings | Mail merge from CSV, merge fields, address block, greeting line, rules, preview, finish to a document; envelopes and labels |
| View | Print layout, web layout, draft, read mode, focus, zoom, one/multiple pages, page width, Navigation pane, rulers, gridlines, dark mode; interface in English, 简体中文, 繁體中文, 日本語 or Português (Brasil) (follows the system language by default) |
| Files | .docx read/write (opens in Word), PDF export, .odt, .rtf, .html, .md, .txt import/export, page images |
The honest picture, area by area, is in ROADMAP.md and the generated feature parity report.
Quick start
git clone https://github.com/storytold/wordcraft
cd wordcraft
cargo run --release -p wordcraft -- --sample # the desktop app with the sample document
cargo run --release -p wordcraft -- report.docx # open a document
Command line:
wordcraft-cli convert report.docx report.pdf # docx, pdf, odt, rtf, html, md, txt, png
wordcraft-cli text report.docx # plain text
wordcraft-cli inspect report.docx # structure as JSON
wordcraft-cli run --template sample \
--cmd 'select.text={"text":"Membership"}' --cmd format.bold --save out.docx
Web: cd apps/wordcraft-web && trunk serve, then open http://127.0.0.1:8771/?sample.
For agents: CLI and MCP
WordCraft was designed to be driven by people and by AI agents.
claude mcp add wordcraft -- wordcraft-cli mcp # headless documents
wordcraft --control 7981 & # or drive the running app…
claude mcp add wordcraft-app -- wordcraft-cli mcp --connect 127.0.0.1:7981
Tools include list_commands, execute, batch, type_text, select_text, inspect_document,
render_page, save_document, and, with a running app, screenshot, click and key. Agents
can check their work through inspect_document without screenshots. See docs/mcp.md
and the control protocol. Macros record any sequence of commands and
play it back (tools.recordMacro, tools.macros).
Logs
The desktop app writes its log records to standard error and to logs/wordcraft.log next to its
preferences: on Linux $XDG_CONFIG_HOME/wordcraft/logs/ (by default ~/.config/wordcraft/logs/),
on macOS ~/Library/Application Support/WordCraft/logs/, on Windows %APPDATA%\WordCraft\logs\.
A start from a desktop menu or the Dock has no terminal, so this file is what to attach to a bug
report: unreadable parts of a .docx, pictures or fonts a PDF export had to leave out and panics the
command guard recovered from land there. Each launch moves the previous log to wordcraft.1.log
(and that one to wordcraft.2.log), so the log of a run that crashed survives the next start; a
log stops growing at 16 MiB. --version writes no file, and runs with WORDCRAFT_NO_PREFS (agents'
test runs) log to standard error only. Document text is never logged; a panic message leaves out
the text it quotes.
By default WordCraft's own crates log at info and everything else at warn. RUST_LOG replaces
that with env_logger-style directives, for example RUST_LOG=debug,
RUST_LOG=warn,wordcraft_docx=trace or RUST_LOG=info,wgpu_core=warn; a directive ending in *
covers every target starting with it (wordcraft*=debug). The logger is
apps/wordcraft/src/logging.rs.
Architecture
| Layer | Crate | Job |
|---|---|---|
| L0 | wordcraft-geom |
units and measurements |
| L1 | wordcraft-doc, wordcraft-fonts, wordcraft-proof |
document model and editing; fonts and shaping; spelling, grammar, hyphenation |
| L2 | wordcraft-layout, wordcraft-docx, wordcraft-formats |
line breaking, pagination, tables, notes, hit testing; OOXML; ODT/RTF/HTML/Markdown/TXT |
| L3 | wordcraft-render, wordcraft-pdf |
rasteriser (vello_cpu); PDF (krilla) |
| L4 | wordcraft-engine |
session, undo, 389 commands, Word feature catalog |
| L5 | wordcraft-mcp |
MCP server |
| L6 | wordcraft-ui-egui |
the Word-style front end (swappable) |
| apps | wordcraft, wordcraft-cli, wordcraft-web |
desktop, command line, browser |
cargo xtask ci runs formatting, clippy, ~250 tests, the asset-attribution check, the layering
check and the wasm build. Contributor and agent instructions: AGENTS.md.
Roadmap
WordCraft covers 87% of Word's ribbon features with commands today; counting depth and fidelity, we estimate about 62% of real feature parity. An alpha for everyday writing is close: the remaining work is mostly testing against real-world .docx files, native printing and the first signed builds. Charts, SmartArt, the equation editor and the Draw tab come after. Details and estimates: ROADMAP.md.
Downloads
Download WordCraft from GitHub: the latest release has every build listed below, and all releases has earlier versions and their notes. <ver> in the file names is the version number, and SHA256SUMS.txt lists a checksum for every file.
Windows
| Build | Installer | Portable |
|---|---|---|
| x64 (64-bit Intel/AMD) | wordcraft-<ver>-windows-x64.msi |
wordcraft-<ver>-windows-x64-portable.zip |
| arm64 (Snapdragon and other ARM PCs) | wordcraft-<ver>-windows-arm64.msi |
wordcraft-<ver>-windows-arm64-portable.zip |
| x86 (32-bit) | wordcraft-<ver>-windows-x86.msi |
wordcraft-<ver>-windows-x86-portable.zip |
Installers and executables are code-signed.
If the app doesn't open on Windows: the desktop app initializes only DirectX 12 by default.
Letting wgpu also create an OpenGL instance can crash some graphics drivers (AMD's
atio6axx.dll) before the window appears, so the app would flash in Task Manager and quit.
WGPU_BACKEND overrides the default for troubleshooting (for example dx12 or vulkan). In
PowerShell, from the folder containing the executable:
$env:WGPU_BACKEND = "vulkan"
& .\wordcraft.exe
Remove-Item Env:WGPU_BACKEND # restore the default for later launches
An explicit gl override can bring the driver crash back on affected systems. The macOS, Linux
and web backend defaults are unchanged.
macOS
| Build | File | Notes |
|---|---|---|
| App, universal (Apple silicon + Intel) | wordcraft-<ver>-macos-universal.dmg |
Signed and notarized |
| Command-line tool, universal | wordcraft-cli-<ver>-macos-universal.zip |
Signed and notarized |
Linux
| Format | x86_64 | aarch64 (ARM64) | Notes |
|---|---|---|---|
| AppImage | wordcraft-<ver>-linux-x86_64.AppImage |
wordcraft-<ver>-linux-aarch64.AppImage |
Runs anywhere; updates itself with AppImageUpdate (.zsync files) |
| Flatpak | wordcraft-<ver>-linux-x86_64.flatpak |
wordcraft-<ver>-linux-aarch64.flatpak |
Sandboxed; flatpak install --user <file> |
| Debian/Ubuntu | wordcraft-<ver>-linux-x86_64.deb |
wordcraft-<ver>-linux-aarch64.deb |
|
| Fedora/RHEL/openSUSE | wordcraft-<ver>-linux-x86_64.rpm |
wordcraft-<ver>-linux-aarch64.rpm |
|
| Tarball | wordcraft-<ver>-linux-x86_64.tar.gz |
wordcraft-<ver>-linux-aarch64.tar.gz |
Unpack anywhere |
FreeBSD
| Build | File |
|---|---|
| x86_64 | wordcraft-<ver>-freebsd-x86_64.tar.gz |
Web (WebAssembly)
| Build | File | Notes |
|---|---|---|
| Static site | wordcraft-web-<ver>.zip |
Runs in a modern browser; host it on any static server |
The Crafting Apps
WordCraft is one of the Crafting Apps: free, open-source creative tools from the ArtCraft team, each written from scratch in Rust and each able to stand on its own.
| App | What it's for | Code | Learn more | |
|---|---|---|---|---|
 |
PhotoCraft | Image editing: layers, masks, type and real PSD files | GitHub | Website |
 |
VectorCraft | Vector illustration | GitHub | Website |
 |
FilmCraft | Video editing, color and sound | GitHub | Website |
 |
LightCraft | Photo library and raw development | GitHub | Website |
 |
PdfCraft | Reading, organizing and protecting PDFs | GitHub | Website |
 |
EffectCraft | Motion graphics and visual effects | GitHub | Website |
 |
DesignCraft | Page layout and publishing | GitHub | Website |
 |
WordCraft | Writing and document design · you are here | GitHub | Website |
And ArtCraft itself, our AI image and video studio for artists who want real control.
Come make things with us
Our Discord is where artists of every kind hang out: people who paint, shoot, draw, cut film, set type, and people still figuring out what they like to make. Share what you're working on, ask for help, tell us what's broken, or tell us what you wish these tools could do. Whatever your medium and however long you've been at it, you're welcome here.
discord.gg/artcraft · getartcraft.com · The Crafting Apps · WordCraft
License and credits
WordCraft is dual-licensed under MIT or Apache-2.0, at your option. Copyright (c) 2026 ArtCraft Team and the WordCraft contributors. Required notices are in NOTICE.
Bundled fonts, icons, images and other assets keep their own open licenses; each one is listed with its author, source and license in ATTRIBUTION.md.
The spelling dictionary and hyphenation come from Grady Ward's public-domain Moby Hyphenator II word list. The sample documents and templates are original text written for WordCraft.
The ArtCraft name, wordmark and logos in docs/brand/ are trademarks of the
ArtCraft Team and are not covered by this license. They may be used only unmodified, and only as
part of this repository and WordCraft, under docs/brand/LICENSE-brand.txt.
Forks and modified versions must remove them.
Microsoft and Microsoft Word are trademarks of the Microsoft group of companies. Adobe, Photoshop, Illustrator, Premiere Pro, Lightroom, Acrobat, After Effects and InDesign are trademarks or registered trademarks of Adobe Inc. in the United States and/or other countries. WordCraft is an independent, open-source project and is not affiliated with, sponsored by or endorsed by Microsoft Corporation or Adobe Inc.; these names are used only to describe the workflows it is compatible with.
Made by the ArtCraft team and community.