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* feat(tables): freeze columns * fix(tables): sticky meta-header row for frozen workflow groups, remove dead handleChangeType * fix(tables): scope frozenOffsets dep to frozen column widths only * fix(tables): restore frozenColumns on delete-column undo/redo * fix(tables): restore useMemo for isAllRowsSelected (O(n) computation) * fix(tables): use current frozenColumns on delete-column redo, not stale snapshot * fix(tables): clean up frozenColumns on create-column undo * fix(tables): merge frozen state on delete-column undo instead of overwriting * fix(tables): add previousFrozenColumns to test fixture for delete-column action * fix(tables): skip frozen state update on delete-column redo when column was not frozen * refactor(tables): rename frozen columns to pinned, fix sticky-zone UX - rename frozenColumns → pinnedColumns across types, contract, undo actions, grid state/refs/props, and dropdown labels - add Pin / PinOff emcn icons; use them in the column menu in place of Lock / Unlock - pinned body cells render at z-[6], above the cell selection border (z-[5]), so the blue selection border can't draw on top of the sticky-left zone - restrict column drag-reorder to within the pinned or unpinned zone in both handleColumnDragOver and handleScrollDragOver; cross-zone drop indicators are suppressed - on unpin, slide the column to the first unpinned slot so the sticky zone stays contiguous; consolidates pin and unpin into one branch that always re-enforces pinned-at-front Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * fix(tables): biome formatting + tighten pinned-zone comments - collapse two onPinToggle JSX props that biome wanted on a single line - drop a WHAT comment in handleScrollDragOver; tighten the why-comments in handlePinToggle, handleColumnDragOver, and handleColumnDragEnd so they describe the invariant being protected instead of narrating the recent change Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * fix(tables): re-sort reorder-columns undo to keep pinned-at-front If the user reordered, then pinned a column, then undid the reorder, the restored snapshot could leave a currently-pinned column in the middle of columnOrder. pinnedOffsets walks displayColumns left→right and assigns sticky `left` from checkboxColWidth — a pinned column in the middle gets a sticky offset as if it were at the front, causing it to jump over its left neighbors on horizontal scroll. Re-sort the restored order with pinned entries pulled to the front before applying. Mirrors the belt-and-suspenders re-sort in handleColumnDragEnd. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Theodore Li <theo@sim.ai> Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The open-source platform to build AI agents and run your agentic workforce. Connect 1,000+ integrations and LLMs to orchestrate agentic workflows.
Build Workflows with Ease
Design agent workflows visually on a canvas—connect agents, tools, and blocks, then run them instantly.
Supercharge with Copilot
Leverage Copilot to generate nodes, fix errors, and iterate on flows directly from natural language.
Integrate Vector Databases
Upload documents to a vector store and let agents answer questions grounded in your specific content.
Quickstart
Cloud-hosted: sim.ai
Self-hosted: NPM Package
npx simstudio
Note
Docker must be installed and running on your machine.
Options
| Flag | Description |
|---|---|
-p, --port <port> |
Port to run Sim on (default 3000) |
--no-pull |
Skip pulling latest Docker images |
Self-hosted: Docker Compose
git clone https://github.com/simstudioai/sim.git && cd sim
docker compose -f docker-compose.prod.yml up -d
Sim also supports local models via Ollama and vLLM — see the Docker self-hosting docs for setup details.
Self-hosted: Manual Setup
Requirements: Bun, Node.js v20+, PostgreSQL 12+ with pgvector
- Clone and install:
git clone https://github.com/simstudioai/sim.git
cd sim
bun install
bun run prepare # Set up pre-commit hooks
- Set up PostgreSQL with pgvector:
docker run --name simstudio-db -e POSTGRES_PASSWORD=your_password -e POSTGRES_DB=simstudio -p 5432:5432 -d pgvector/pgvector:pg17
Or install manually via the pgvector guide.
- Configure environment:
cp apps/sim/.env.example apps/sim/.env
# Create your secrets
perl -i -pe "s/your_encryption_key/$(openssl rand -hex 32)/" apps/sim/.env
perl -i -pe "s/your_internal_api_secret/$(openssl rand -hex 32)/" apps/sim/.env
perl -i -pe "s/your_api_encryption_key/$(openssl rand -hex 32)/" apps/sim/.env
# DB configs for migration
cp packages/db/.env.example packages/db/.env
# Edit both .env files to set DATABASE_URL="postgresql://postgres:your_password@localhost:5432/simstudio"
- Run migrations:
cd packages/db && bun run db:migrate
- Start development servers:
bun run dev:full # Starts Next.js app and realtime socket server
Or run separately: bun run dev (Next.js) and cd apps/sim && bun run dev:sockets (realtime).
Copilot API Keys
Copilot is a Sim-managed service. To use Copilot on a self-hosted instance:
- Go to https://sim.ai → Settings → Copilot and generate a Copilot API key
- Set
COPILOT_API_KEYenvironment variable in your self-hosted apps/sim/.env file to that value
Environment Variables
See the environment variables reference for the full list, or apps/sim/.env.example for defaults.
Tech 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.
Made with ❤️ by the Sim Team