Waleed
2ba248472e
* fix(editor): restore caret alignment and the intended type scale across the panel
Four distinct defects, all surfaced while testing the workflow editor.
**Caret drift in the Start block's Description field.** Its overlay mirror was
built differently from every sibling field: `overflow-hidden` + `truncate` and
no scroll synchronisation, where the working fields use `overflow-x-auto` +
`whitespace-pre` + `syncOverlayScroll`. Once the value passed the visible width
the input scrolled and carried the caret with it while the overlay stayed pinned
at the first character, so the gap grew as you typed. It now has the same
plumbing as its siblings, on its own ref maps so it cannot collide with the value
overlay.
**Overlay mirrors left at 500 over 400 inputs.** #6291 dropped emcn Input and
Textarea to the inherited weight, but the canvas files that mirror them were
reverted from that PR, so 11 overlays kept a hardcoded `font-medium`. A mirror
that renders heavier than the input beneath it misaligns by the weight delta on
every character. All 11 realigned.
**Input text tracking differently from its label.** The UA stylesheet resets form
controls to `letter-spacing: normal`, so inside `.workspace-root` (0.02em) an
input diverged from surrounding text — and from its own overlay — by 0.28px per
character. emcn Input and Textarea now carry `[letter-spacing:inherit]`, which
fixes every mirrored input at the source rather than per call site.
**Weights and type sizes that changed meaning under #6241.** That PR deleted the
tailwind remap of `font-medium` (440 light / 480 dark) without migrating the
~505 call sites written against it, so untouched code jumped to a stock 500. The
panel's editor, toolbar, chat and connections surfaces are swept back to the
inherited weight. The Chat header was also visibly taller than Toolbar and Editor
purely because it used `text-[14px]` — font-size with no paired line-height —
against otherwise byte-identical containers; it and the panel's two other
arbitrary sizes now use named tokens.
Also fixes five JSX conditionals in the workflow MCP settings page that had lost
their braces, so `canManage && ()` rendered as literal text under the server
detail tab.
Verified: typecheck 0, biome clean, 18644/18645 vitest passing (the one failure
is a missing `rg` binary and predates this branch).
* fix(emcn): give chip text fields the same tracking as their mirrors
An audit of the previous commit found the letter-spacing fix was incomplete: it
landed on `Input`/`Textarea` but not on the chip family, so `ChipInput` and
`ChipTextarea` kept the UA `letter-spacing: normal` while any overlay mirroring
them inherited the ambient tracking.
The MCP server form modal is a live instance — its shared `FormattedInput` layers
a transparent `ChipInput` under a visible div, across the server URL and both
header fields, whose values are long by nature. The caret separated from the text
by roughly 0.28px per character.
Fixed on `chipFieldTextClass` rather than the call site, so every chip field
matches its mirror the way `Input`/`Textarea` already do.
* fix(editor): restore the strong-text variant a class sweep welded together
The font-weight sweep in 94c9f1f68 used a blanket sed, which turned
[&_strong]:font-medium [&_strong]:text-[var(--text-primary)]
into [&_strong]:[&_strong]:text-[var(--text-primary)] — a chained variant
matching a <strong> inside a <strong>, so ordinary strong text in trigger setup
instructions lost its color.
The removed weight was also load-bearing rather than decorative. Preflight sets
b/strong to font-weight: bolder, so against a 400 body a bare <strong> lands near
700; the class was holding it down to 500. Deleting it made that text heavier,
the inverse of the sweep's intent — the same UA-default trap as <th>. Both
variants are restored.
Swept for the same damage: no chained [&…]:[&…] variants remain across apps/sim
or packages, and this was the only variant-scoped weight the sed touched.
Found independently by Greptile and Cursor Bugbot.
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 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.
