Collaborative Document Editor (CRDT)

• What it is: A collaborative document-editing server (package name tiptap_editor) — several users edit the same document in real time via CRDT (Yjs). Part of the healthcare-platform health ecosystem (likely editing of lab/medical reports; the TipTap schema has SVG nodes for visual templates). Persistence in Postgres, synchronization across instances via Redis.
• Type / status / role: api (real-time backend) / maintained / solo — all 83 commits authored by Davron Yuldashev (two identities davr@Davrons-MacBook-Pro.local 82 + yul.davron.93 1 — both his).
• Activity period: 2025-01-22 → 2025-04-19 (~3 months), 83 commits.

• Languages: TypeScript (Bun runtime).
• Real-time/collab: @hocuspocus/server 2.15 + extensions database / redis / webhook / logger, Yjs 13.6 (+ y-protocols, y-websocket, y-webrtc), TipTap 2.11 (core + starter-kit + collaboration), @hocuspocus/transformer (TiptapTransformer).
• API/infra: Elysia (+ CORS) and Express, REST (rest.ts) + Swagger/OpenAPI, ws (websocket). BullMQ (queue + queue_processors), ioredis. JWT authorization via jose (+ jsonwebtoken) — jwtVerify with JWT_SECRET.
• Data: PostgreSQL (Drizzle ORM + pg/postgres, db/schema table documents), Redis (Hocuspocus synchronization across nodes + queues).
• Build: Bun, drizzle-kit migrations.

Solo, 83 commits. From the code:

• Hocuspocus server (hocuspocus.ts, 11.6 KB) with document persistence in Postgres (load/store via @hocuspocus/extension-database), Redis extension for scaling, webhook/logger extensions.
• JWT authentication at the Hocuspocus level (jwtVerify, jose) — token verification on connection to a document room.
• Custom TipTap schema — bespoke nodes CustomDiv, CustomSVG (block-level SVG with xmlns), custom attributes (class/style/id/onclick) — editor extension for domain templates (medical documents with graphics).
• REST + Swagger (rest.ts, swagger/) — an HTTP surface on top of the collab server.
• Queues (queue.ts, queue_processors/, BullMQ) — background processing (document export/conversion?).

Confirmed by code (hocuspocus.ts, package.json).

• Real-time collaboration on CRDT → Yjs + Hocuspocus: conflict-free merging of edits from multiple users without manual operational transformations. Non-trivial area (CRDT) — a strong engineering signal.
• Horizontal scaling of the collab server → @hocuspocus/extension-redis: Yjs updates synchronized across instances via Redis pub/sub (not a single node). Understanding of distributed real-time.
• Yjs document persistence → extension-database + Drizzle/Postgres: load/store of the binary Yjs state into the documents table.
• Room security → JWT verification (jose) on connection — only authorized users can edit a document.
• Domain extension of the editor → custom TipTap nodes (SVG/div with arbitrary attributes) for medical templates; TiptapTransformer for HTML↔Yjs.
• Webhook integration → extension-webhook notifies external services of document changes (likely the healthcare-platform backend).

• Sessions found: 0 (no matches for the full key). The period (early 2025) predates the user's active use of CC.
• What was done with AI: no data.
• AI-workflow patterns: none.

• Full real-time collab backend: CRDT + persistence + Redis scaling + JWT + queues.
• 83 commits solo over ~3 months.
• Custom editor schema (SVG/div nodes) for medical documents.
• Integrations: Postgres, Redis, webhooks, Swagger API.