Our notes got beautiful. Then they stopped being ours.
Polished tools keep our notes on their servers and sell AI back to us. Local tools give us the files, but not the polish. You shouldn't have to choose.
Cloud workspaces
Polished, but not yours.
A lovely editor
Your notes on their servers
AI on their terms, for a fee
Local Markdown apps
Yours, but unpolished.
Plain files on your disk
Polish takes plugins and setup
Built for tinkerers first
Betelgeuse
Polished, and yours.
An editor that just works
Plain Markdown and git, on your disk
Any AI, reading only what you share
Introducing Betelgeuse
The polish of a modern workspace. The freedom of plain files.
What you see in the app is a Markdown file you can open anywhere.
In BetelgeuseOn disk
Ship the MCP server.md
🔌 Ship the MCP server
StatusIn progressDueOct 9, 2026Tagsagents
💡 Every agent write is its own git commit.
✓Bundle the server
Publish to the registry
---Status: In progressDue: 2026-10-09
Tags: [agents]
---> [!yellow] 💡> Every agent write is its own git commit.
- [x] Bundle the server
- [ ] Publish to the registry
Write
Every block, one keystroke away.
Type / for headings, to-dos, callouts, code, tables and columns. Link pages with [[.
Launch plan
🚀 Launch plan
Everything we need before the public beta.
✓Write the announcement
Record the demo video
/call
💡Beta ships Friday. Agents can read this page.
Basic blocks
TText
H₁Heading 1#
☐To-do list[]
💡Callout>
▸Toggle list
Organise
Databases made of plain files.
Table, board, list, gallery and calendar views. Every row is a page, every property lives in the file.
Roadmap · Board
Not started2
📄 Sync vault to GitHub
gitOct 16
📄 Search index
appOct 30
In progress21
📄 Ship the MCP server
In progressDoneOct 9
📄 Write the docs
docsOct 12
Done12
📄 Database views
appOct 2
Remember
Every change saved. Every version back.
Your work is committed to git as you go. Restore any version in a click, including an agent's.
History · Launch plan.md
✦Update “Launch plan”Claude Code via Betelgeuse MCPagentRestore
YEdit RoadmapYou4 min ago
YCreate “Launch plan”You1 hour ago
✦Append to “Decisions”Cursor via Betelgeuse MCPagentyesterday
YRename “Specs”Youyesterday
Committed to git · 3f9c2a1
Connect
A knowledge base for your agents.
Claude Code, Cursor and any MCP client can search, read and update your notes. Every edit is a commit.
claude · ~/code/betelgeuse
> What's still open on the roadmap?
⏺ betelgeuse.query_database(Roadmap, Status ≠ Done)
⎿ 2 rows
• Ship the MCP server · in progress · Oct 9
• Sync vault to GitHub · not started · Oct 16
> Mark the first one done.
⏺ betelgeuse.update_note(Roadmap/Ship the MCP server)
⎿ ✓ Committed as “Claude Code via Betelgeuse MCP”
Control
You decide what AI can see.
Hide any page with one switch, or share only what you choose. Hidden pages don't exist for agents.
Your workspace
📐Product specs
🗺️Roadmap
📓Journal
🧭Decisions
💰Finances
✦ What your agent sees
📐Product specs
🗺️Roadmap
📓Journal
🧭Decisions
🔒1 page hidden2 pages hidden
How it works
The folder is the product.
No servers. No sync service. No export button. Just files.
BetelgeuseWhere you write
Your folderMarkdown + git
MCP serverFilters what's hidden
Your agentsClaude Code, Cursor…
Open source
Built in the open. Yours to shape.
MIT licensed and developed on GitHub. Star it, fork it, make it better.
