Waleed
74d0a47525
* fix(trigger): auto-detect header row and rename lastKnownRowCount to lastIndexChecked - Replace hardcoded !1:1 header fetch with detectHeaderRow(), which scans the first 10 rows and returns the first non-empty row as headers. This fixes row: null / headers: [] when a sheet has blank rows or a title row above the actual column headers (e.g. headers in row 3). - Rename lastKnownRowCount → lastIndexChecked in GoogleSheetsWebhookConfig and all usage sites to clarify that the value is a row index pointer, not a total count. - Remove config parameter from processRows() since it was unused after the includeHeaders flag was removed. * fix(trigger): combine sheet state fetch, skip header/blank rows from data emission - Replace separate getDataRowCount() + detectHeaderRow() with a single fetchSheetState() call that returns rowCount, headers, and headerRowIndex from one A:Z fetch. Saves one Sheets API round-trip per poll cycle when new rows are detected. - Use headerRowIndex to compute adjustedStartRow, preventing the header row (and any blank rows above it) from being emitted as data events when lastIndexChecked was seeded from an empty sheet. - Handle the edge case where the entire batch falls within the header/blank window by advancing the pointer and returning early without fetching rows. - Skip empty rows (row.length === 0) in processRows rather than firing a workflow run with no meaningful data. * fix(trigger): preserve lastModifiedTime when remaining rows exist after header skip When all rows in a batch fall within the header/blank window (adjustedStartRow > endRow), the early return was unconditionally updating lastModifiedTime to the current value. If there were additional rows beyond the batch cap, the next Drive pre-check would see an unchanged modifiedTime and skip polling entirely, leaving those rows unprocessed. Mirror the hasRemainingOrFailed pattern from the normal processing path. * chore(trigger): remove verbose inline comments from google-sheets poller * fix(trigger): revert to full-width A:Z fetch for correct row count and consistent column scope * fix(trigger): don't count skipped empty rows as processed
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
Background worker note
The Docker Compose stack starts a dedicated worker container by default. If REDIS_URL is not configured, the worker will start, log that it is idle, and do no queue processing. This is expected. Queue-backed API, webhook, and schedule execution requires Redis; installs without Redis continue to use the inline execution path.
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, realtime socket server, and the BullMQ worker
If REDIS_URL is not configured, the worker will remain idle and execution continues inline.
Or run separately: bun run dev (Next.js), cd apps/sim && bun run dev:sockets (realtime), and cd apps/sim && bun run worker (BullMQ worker).
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
- UI: Shadcn, Tailwind CSS
- State Management: Zustand
- Flow Editor: ReactFlow
- Docs: Fumadocs
- Monorepo: Turborepo
- Realtime: Socket.io
- Background Jobs: Trigger.dev
- Remote Code Execution: E2B
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