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* fix(tooltip): remove velocity skew/scale that blurred text on every appear The tooltip animated a fractional scale() + skew() over 150ms on the element containing its text. Chrome promotes the bubble to a compositor layer for the transition, rasterizes the text once at the pre-transition scale, then GPU-resamples that bitmap for the duration — so text rendered blurry until the transition settled and the layer re-rasterized at 1:1. It fired on every appear: a pointer entering a trigger is by definition moving, so the first pointermove after pointerenter always set a non-zero skew and a fractional scale. - drop the velocity-reactive skew/scale flourish and the pointer-velocity bookkeeping that existed only to feed it - round tooltip position to whole pixels; clientX/clientY are fractional on HiDPI/zoomed displays, leaving the bubble on a subpixel boundary - drop the dead `filter` from the transition list — nothing ever set a filter - skip the state update when the rounded position is unchanged, so pointer jitter no longer re-renders every Tooltip.Trigger/Content consumer The 150ms ease-out translate is kept, so the bubble still trails the cursor. * improvement(tooltip): keep the velocity flourish, drive it without a CSS transition Restores the velocity-reactive skew/scale removed in the previous commit. The flourish was never the problem on its own — handing it to a CSS transition was. An interpolated fractional scale makes the compositor rasterize the tooltip's text once and resample that bitmap for the duration, which is what read as blur. Applied as a static value per pointer event instead, so every frame is rasterized at its own scale: - split the transform across the individual `translate`, `scale`, and `transform: skew()` properties, and transition only `translate` — position still eases toward the cursor, the flourish no longer interpolates - smooth the pointer velocity in JS (low-pass filter) to replace the smoothing the CSS transition used to provide, so the squish still ramps rather than snapping between raw per-event velocities - quantize the flourish to 3 decimals so jitter below the visible threshold settles instead of re-rendering every consumer Whole-pixel position rounding and the redundant-update bail-out are unchanged. * fix(tooltip): don't seed pointer velocity from the trigger box on focus The previous commit routed `onFocus` through a shared reveal helper that seeds `lastPointerRef` from the coordinates it is given. For focus those are the trigger's box center, not the pointer — so if the pointer already happened to be over the trigger, the next `pointermove` measured the box-to-cursor delta as velocity and spiked the skew/scale flourish. Split the helper in two: reveal-from-pointer seeds velocity tracking, reveal-from-element leaves it cleared. Restores the pre-PR behavior, where focus explicitly nulled the pointer snapshot. Caught by Cursor Bugbot. * fix(tooltip): make the flourish smoothing frame-rate independent The velocity low-pass filter applied a fixed coefficient per pointer event, so how fast the squish settled depended on how fast the device emitted events — 233ms at 30Hz down to 29ms at 240Hz, an 8x spread for the same gesture. It was also far snappier than the 150ms CSS ease-out it replaced, so the flourish read as twitchier than before. Derive the coefficient from the real elapsed time instead (1 - exp(-dt / tau), tau = 50ms). Settling is now flat at ~150ms from 60Hz upward, matching the duration of the transition this stands in for. Also separates the smoothing delta from the velocity-normalization delta: the latter is still floored at one frame to keep a 1ms event from reporting an enormous velocity, but flooring the former was itself a source of frame-rate dependence below 16ms. Verified against Chrome's documented re-raster behavior: a layer is re-rastered at its new scale when the scale changes via script, but not when a declarative animation interpolates it, which is why the flourish must stay out of the transition list. https://developer.chrome.com/blog/re-rastering-composite
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.
