* perf(tools): move mergeToolParameters into a registry-free leaf module
`providers/utils.ts` imports exactly one thing from `@/tools/params`:
`mergeToolParameters`. That function performs no tool lookup at all — it merges
two plain param objects. But `params.ts` imports `getTool` from `@/tools/utils`,
which statically imports the 4,300-entry `@/tools/registry` barrel, so that
one-symbol import was dragging the entire tool registry into every module graph
that reached it.
Measured with a module-graph walk from each entry:
tools/params.ts 4,926 modules (registry reachable)
providers/utils.ts 4,926 modules (registry reachable) -> 22 modules ✅
tools/merge-params.ts 2 modules (registry NOT reachable)
`mergeToolParameters`, `deepMergeInputMapping` and `isNonEmpty` move to
`@/tools/merge-params`, which is forbidden from importing `@/tools/utils`,
`@/tools/registry` or `@/tools/params`. `params.ts` now imports `isNonEmpty`
from there; its `isRecordLike` and `isEmptyTagValue` imports became unused and
are dropped. The two consumers (`providers/utils.ts`,
`executor/handlers/pi/sim-tools.ts`) import from the new module directly rather
than via a re-export, per the no-re-exports rule.
This is preparation, not the payoff. The canvas route still reaches the registry
through three other edges (block-outputs, serializer, sanitization/validation) —
all four are redundant paths and must all be cut before the route's module count
moves. Those follow in the metadata-manifest PRs.
Behaviour is unchanged: the moved functions are copied verbatim.
* refactor(tools): make deepMergeInputMapping module-private
It was exported from `@/tools/params` and imported by nothing — a private helper
of `mergeToolParameters` that had leaked into the public surface. Since this move
created the module, the export goes with it rather than being carried forward.
Verified zero consumers repo-wide before dropping it.
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.





