A single-file relational spreadsheet, for you and your agent.

Eidos File is an open, single-file format built on standard SQLite.
Eidos Lite is the desktop app for working with Eidos Files and ordinary files in a local folder.

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Get started

• Desktop: Download Eidos Lite to work with a local folder. No account is required for local use.
• Browser: Open editor.eidos.space to create or edit a local .eidos file without installing anything.
• CLI: Install eidos to create, inspect, query, update, and serve Eidos Files.

macOS or Linux:

curl -fsSL https://download.eidos.space/cli/install.sh | sh

Windows PowerShell:

irm https://download.eidos.space/cli/install.ps1 | iex

Create a file and open it locally:

eidos create example.eidos \
  --table Tasks \
  --label-field Title \
  --fields '[{"name":"Title","type":"text"},{"name":"Status","type":"select"}]'
eidos serve example.eidos --open

See the Eidos CLI guide for agent and automation workflows.

Repository

• packages/eidos-file implements the Eidos File format and Runtime.
• packages/eidos-file-ui provides the shared React editor UI.
• apps/eidos-lite-desktop is the desktop app.
• apps/eidos-file-web powers the browser editor.
• apps/cli contains the agent-first CLI and local server.
• apps/sqlite-web-viewer is a standalone, read-only SQLite viewer.

Eidos Lite uses Graft for local version history and optional Sync. Graft is developed as an independent, developer-facing version-control system for application state.

Development

Requirements: Node.js 22.23.1, Corepack, and Rust stable for CLI work.

corepack enable
pnpm install --frozen-lockfile

pnpm dev:eidos-lite
pnpm dev:eidos-file-web
pnpm test:eidos-file

CLI development stays in its Rust workspace:

cd apps/cli
cargo test --workspace --locked

See the documentation site and the normative Eidos File specifications for more detail.

License

The repository is licensed under AGPL v3. The reusable @eidos.space/eidos-file and @eidos.space/eidos-file-ui packages are released under MIT.