Proof SDK is the open-source editor, collaboration server, provenance model, and agent HTTP bridge that power collaborative documents in Proof.

If you want the hosted product, use Proof.

• Collaborative markdown editor with provenance tracking
• Comments, suggestions, and rewrite operations
• Realtime collaboration server
• Agent HTTP bridge for state, marks, edits, presence, and events
• A small example app under apps/proof-example

• packages/doc-core
• packages/doc-editor
• packages/doc-server
• packages/doc-store-sqlite
• packages/agent-bridge
• apps/proof-example
• server
• src

Requirements:

Install dependencies:

Start the editor:

Start the local server:

The default setup serves the editor on http://localhost:3000 and the API/server on http://localhost:4000.

Canonical Proof SDK routes:

• POST /documents
• GET /documents/:slug/state
• GET /documents/:slug/snapshot
• POST /documents/:slug/edit
• POST /documents/:slug/edit/v2
• POST /documents/:slug/ops
• POST /documents/:slug/presence
• GET /documents/:slug/events/pending
• POST /documents/:slug/events/ack
• GET /documents/:slug/bridge/state
• GET /documents/:slug/bridge/marks
• POST /documents/:slug/bridge/comments
• POST /documents/:slug/bridge/suggestions
• POST /documents/:slug/bridge/rewrite
• POST /documents/:slug/bridge/presence

Compatibility aliases remain mounted for the hosted product, but the routes above are the public SDK surface.

The build outputs the web bundle to dist/ and writes dist/web-artifact-manifest.json.

• AGENT_CONTRACT.md
• docs/agent-docs.md
• docs/proof.SKILL.md
• docs/adr/2026-03-proof-sdk-public-core.md

• Code: MIT in LICENSE
• Trademark guidance: TRADEMARKS.md