Waleed
75718ab39f
* fix(execution): stop a cancelled run reporting success when its wait swallows the cancellation Cancellation reaches a running execution over Redis pub/sub, which is at-most-once. The engine turns that into `status: 'cancelled'` via `signalCancelled`. But the wait handler also polled the durable Redis cancellation key itself, and on a hit it broke out of its sleep and returned an ordinary successful block output. The engine's `cancelledFlag` stayed false, so a cancelled run finished as `success: true` — and with a block after the wait, kept executing. Whichever detector fired first won. The engine's pub/sub path normally wins by about one round trip; when the wait's own 500ms poll landed inside that window the cancellation was lost. Consolidate detection in the engine, which is the only component that can project run status: extend the once-at-start durable backstop into a poll that runs for the life of the run and routes through `signalCancelled`. The wait handler and loop orchestrator now observe only `ctx.abortSignal`, which the engine aborts, so no leaf can observe a cancellation the engine has not seen. The loop orchestrator additionally used to ignore `abortSignal.aborted` whenever Redis was enabled, so a mid-loop timeout or client disconnect was invisible to it, and it awaited a Redis round trip on every iteration. Handlers that abort their own I/O off `ctx.abortSignal` are unaffected: that surfaces as a throw, which the cancelled branch of `run` already classifies. * docs(wait): correct the in-line wait ceiling to 5 minutes The Wait page claimed a 10-minute cap for a synchronous wait in three places. `MAX_INPROCESS_WAIT_MS`, the block description, the sub-block hint, and the validation error all say 5 minutes.
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 install
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, and knowledge all live in the same workspace.
Tables — a database, built in |
Files — one store for your team and every agent |
Knowledge — your agents' memory |
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.
Reconfigure an optional capability without rerunning the full wizard:
bun run setup status
bun run setup email
bun run setup storage
bun run setup sandbox
bun run setup jobs
bun run setup cache
bun run setup knowledge
bun run setup llm
bun run setup integration slack
bun run setup status detects the effective local-dev, Docker Compose, or current-context
Helm configuration and reports configured, missing, or invalid capabilities and OAuth
integrations without printing credential values. This is separate from bun run sim status,
which reports whether installed services are running and healthy.
Manage your install with bun run sim:
bun run sim start | stop | restart # bring your install up / down / cycle
bun run sim update # pull/rebuild and apply Compose images
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.
