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Waleed
5686b7bb83
* fix(realtime): enforce room access continuously, not only at join File-doc, table, and workspace-list rooms authorized once at JOIN and never again, so a member whose workspace access was revoked or downgraded kept live collaborative write access — including durable Yjs document writes — for the whole lifetime of an already-open socket. The access-revalidation sweep explicitly skipped every non-workflow room. - sweep every room type, authorizing each against its own resource - share one membership policy (ROOM_MEMBERSHIP_ACTIONS) between the join check and the sweep, so a file-doc room keeps requiring write in both - gate file-doc document frames and table cell selections on the cached permission, evicting on a confirmed loss of access - re-check the cached decision before a join commits, so a join that authorized just before a revocation cannot re-enter the room - never let a join's own cache write clobber a revocation recorded mid-flight - surface room-access-revoked to clients; the file-doc editor falls back to read-only instead of accepting keystrokes that go nowhere * refactor(realtime): one shared eviction path for revoked room access The sweep and both per-frame gates each open-coded emit + leave + local-state cleanup. Route them all through evictSocketFromRoom so they cannot diverge on what eviction means; workflow keeps its historical access-revoked payload. * fix(realtime): re-check access before workspace-list room joins too The workspace-files / workspace-tables joins committed straight from their authorize result, so a join that authorized just before a revocation could put the socket back in a room the sweep had already evicted it from. Mirrors the guard the file-doc and table joins already had. * fix(realtime): order role-cache writes by read start, not write time Two authorizations can start in one order and finish in the other, so the decision written last can come from the older read. A join that authorized before a revocation but returned after the sweep's denial would bury it, handing the socket another full cache TTL of access. Every writer now takes a monotonic ticket before it queries and yields only to a later-started read. * chore(realtime): drop the test-only unguarded role-cache writer Tests can express the same setup with commitRoomPermission + a read ticket, so the cache has exactly one write path and no export without a production caller. * fix(realtime): keep handler-initiated table eviction retryable Evicting leaves the Socket.IO room synchronously, which is also how the sweep discovers work — so a presence removal failing in the per-frame path could never be retried and left a ghost collaborator until disconnect. Failed (or unconfirmed) removals now hand off to the sweep's existing cleanup lane instead of a second retry loop. * fix(realtime): re-resolve access at join commit instead of peeking the cache The pre-commit recheck peeked the role cache, which reports an EXPIRED entry as unknown and fails open — so a join stalled longer than the cache TTL could re-enter a room the sweep had already evicted it from, including a file-doc room where the next cold-cache frame is accepted as a durable write. All three joins now re-resolve the way the workflow join always has; it is normally a cache hit, since the join's own authorize just warmed it. * fix(realtime): keep the join generation guard after the access re-check The access re-resolve added in the previous commit sat AFTER the generation / superseded guard in the table and workspace-list joins, so a leave or a newer join landing during that await no longer cancelled the stale join — it would go on to leave the room the client had switched to and commit the abandoned one. The guard is now the last thing before the commit in all three handlers, as it already was for file-doc and workflow. * test(realtime): use the shared sleep helper in the new join tests check:utils bans the inline new Promise(setTimeout) form; the two stalled-join tests were the only new offenders. * fix(realtime): leave the prior table room only once the join is certain A table switch left the previous room before the access re-check ran, so a denial there aborted the join and left the client in no table room at all — silently dropped from one it may still be allowed to occupy. The leave now happens after the re-check, matching the file-doc and workspace-list joins. * fix(realtime): close the table join window between re-check and commit Moving the prior-room leave after the access re-check left Redis awaits between that check and socket.join, and superseded() only watches the join generation — so a sweep revocation landing in that window could still put a revoked socket back in the room. A synchronous cache peek immediately before the commit closes it without reintroducing the await; the authoritative resolve moments earlier wrote a fresh entry, so a differing read IS the revocation being guarded.
A workspace to build, deploy and manage AI agents and workflows.
Quickstart
Cloud-hosted: sim.ai
Self-hosted
git clone https://github.com/simstudioai/sim.git && cd sim
bun run setup
Capabilities
- Connect 1,000+ integrations and every major LLM
- Add Slack, Notion, HubSpot, Salesforce, databases, and more
- Build agents visually, conversationally, or with code
- Ingest files, knowledge bases, and structured table data
- Monitor runs, logs, schedules, and workflow activity
One workspace, every surface
Chat and workflows are just the start — tables, files, knowledge, and scheduled tasks all live in the same workspace.
Tables — a database, built in |
Files — one store for your team and every agent |
Knowledge — your agents' memory |
Scheduled tasks — runs on your schedule |
Self-hosting
bun run setup is an interactive wizard: it provisions the database, generates secrets, writes your .env files, connects a Chat API key, and starts Sim the way you choose:
- Local dev — run from source to contribute or hack on Sim
- Docker Compose — a self-contained instance for testing self-hosting
- Kubernetes (Helm) — deploy to a local cluster
When it finishes, open http://localhost:3000.
Manage your install with bun run sim:
bun run sim start | stop | restart # bring your install up / down / cycle
bun run sim status # what's installed and healthy
bun run sim logs # follow logs
bun run sim doctor # diagnose configuration problems
bun run sim down # remove containers (data kept)
bun run sim reset # archive .env and wipe managed data
sim detects how you're running (Docker Compose, local dev, or Kubernetes) and acts accordingly.
Prefer a bare sim? Run bun link once — but note sim lands in ~/.bun/bin, which Homebrew's bun doesn't add to your PATH, so you may need export PATH="$HOME/.bun/bin:$PATH" in your shell profile.
Sim also supports local models via Ollama and vLLM. See the self-hosting docs for details.
Chat API Keys
Chat is a Sim-managed service. bun run setup connects a Chat API key for you — sign in when it opens your browser and the key is stored automatically. To view, create, or revoke keys later, go to sim.ai/selfhost/settings/chat-keys.
Environment Variables
See the environment variables reference for the full list, or apps/sim/.env.example for defaults.
Tech Stack
Next.js · Bun · PostgreSQL · Drizzle · Better Auth · Tailwind — and the rest of the stack
- Framework: Next.js (App Router)
- Runtime: Bun
- Database: PostgreSQL with Drizzle ORM
- Authentication: Better Auth
- Schema Validation: Zod
- UI: Shadcn, Tailwind CSS
- Streaming Markdown: Streamdown
- State Management: Zustand, TanStack Query
- Flow Editor: ReactFlow
- Docs: Fumadocs
- Monorepo: Turborepo
- Realtime: Socket.io
- Background Jobs: Trigger.dev
- Remote Code Execution: E2B
- Isolated Code Execution: isolated-vm
Contributing
We welcome contributions! Please see our Contributing Guide for details.
License
This project is licensed under the Apache License 2.0 - see the LICENSE file for details.
