The office suite for developers
Open, edit and save real Word, Excel and Project files — in a TUI, in your IDE, or through your AI agent. Faithful OOXML in and out, real engines underneath.
$ cargo install docxy xlsxy yppxy
File Home Styles Insert Review View 0····+····1····+····2····+····3····+····4····+····5····+····6 Report¶ ──────────────────────────────────────────────────────────── A sharper, agent-written opening line.¶ Supporting detail follows here.¶ Appended via MCP.¶ report.docx F9 ribbon · ^S save · ^Z undo · ^F find — edited live by an agent over MCP; every change undoable
File Home Insert Review View D1 │ =SUM(A1:A5)*2 A B C D E F 1 10 300 2 20 3 30 recalculated 4 40 by a real 5 50 calc engine ⊞ 1/2 [ Data ] Calc Zone calc-refs.xlsx ^S save · ^Z undo · ^T sheet · F9 ribbon
File Task Schedule View Task Dur Slack │ 3/2 3/9 ▾ Phase 0d │ ▟▬▬▬▬▬▬▬▬▬▬▟ • A 3d 0d │ ███ • B 1d 0d │ █ • Ship it 2d 0d │ ██ summary * finish 2026-03-09 4 task(s), 3 critical — CPM scheduler: change a duration, watch dependents move
File Home Send / Receive View Inbox — 3 unread ● Corpus CI calc conformance: 538/538 green 9:12 ● Dependabot 3 PRs ready to merge 8:40 ○ OpenSSF Scorecard weekly report 7:05 ⏎ read · r reply · a archive · / search — lookxy: mail read + triage, in preview
The same zero-dependency Rust engines render your documents everywhere you work — no format converters, no cloud round-trips.
Four TUIs with ribbons, live formula recalculation, a real terminal Gantt, images over kitty/iTerm2/Sixel — and vim keys. SSH in and edit the quarterly report.
Every editor ships an MCP server and a live control surface. Agents read and edit the open document — changes land on the undo stack and repaint while you watch.
offxy for VS Code and JetBrains opens .docx and .xlsx as first-class editor tabs, powered by the same engines compiled to WebAssembly. Visual Studio: coming soon.
Each one opens the real file format — not an import, not an approximation — and saves it back losslessly.
Word processor: tables, styles, lists, images (WMF/EMF included), comments, footnotes, find & replace, PDF and Markdown export.
Spreadsheet with a real calculation engine — dynamic arrays, pivots, defined names — conformance-tested against Excel's own cached results across a 500-workbook corpus.
Project scheduler with a Critical Path Method engine: dependencies, slack, resource leveling, baselines — and a Gantt chart drawn in character cells.
Mail reading and triage for the terminal, with the same agent control surface as the rest of the suite.
Register once, and Claude Code (or any MCP client) can drive the live editor: read the open workbook, set a cell, tighten a paragraph, relink a schedule — while the pane repaints in front of you.
Edits go through each app's own edit path: undoable, recalculated, rescheduled. No stale files, no clobbered unsaved work.
claude mcp add docxy -- docxy --mcp
claude mcp add xlsxy -- xlsxy --mcp
claude mcp add yppxy -- yppxy --mcp
# the agent, editing a live spreadsheet → xlsxy_set {"ref":"D1","text":"=SUM(A1:A5)*2"} ← {"ok":true,"result":{"ref":"D1","value":300, "formula":"=SUM(A1:A5)*2","text":"300"}} # …and a live schedule → yppxy_link {"uid":4,"pred":3} ← {"ok":true,"result":{"name":"Ship it", "start":"2026-03-04 08:00","critical":true}} # the pane in your terminal just repainted. undo works.
The core crates — OPC/ZIP, WordprocessingML, SpreadsheetML, scheduling — are dependency-free Rust: hand-written ZIP, XML, and PDF, nothing in the supply chain but the standard library.