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018283b29e
* fix(rich-md-editor): fix raw-HTML-block fragmentation and styling - RawHtmlBlock previously delegated to marked's built-in block-HTML tokenizer, which (per CommonMark's HTML-block-type-6 rule) stops at the first blank line. A real <details> with a paragraph inside — the common case — fragmented into a raw chip, an ordinary rendered paragraph, and a second raw chip, stranding real content in between. - Fixed with a custom block-level tokenizer that scans to the tag's matching close (reusing the balanced open/close depth-tracking already built for nested inline HTML), spanning blank lines, restricted to CommonMark's own block-tag whitelist (details, div, table, section, etc.) so tags that can legitimately start a paragraph (em, a, span, code, kbd) are left untouched. - Dropped the warning-colored tint on raw HTML/footnote blocks (color-mix with --warning read as an error state) in favor of the same neutral surface as existing code blocks — the hover badge alone now signals "this is raw, unrendered text". * fix(rich-md-editor): fix indented HTML, quoted attributes, and code-mention edge cases - CommonMark allows up to 3 leading spaces before a block-HTML opening line; the new block tokenizer required column 0, so an indented <details>/<div> still fragmented across blank lines. Fixed by splitting off the leading indent, matching against the rest, and stitching the indent back onto raw. - The open-tag and balanced-close regexes stopped at the first `>`, even inside a quoted attribute value (e.g. data-example="a > b"), producing wrong match lengths and miscounting a same-tag mention inside the quoted value as a real nested tag. Replaced with an attribute-aware pattern that treats a full quoted value (including any interior >) as one unit. - The balanced-tag scan couldn't distinguish real markup from a tag name mentioned inside inline code or a fenced code block. Now masks code regions (same-length filler, positions preserved) before scanning, so a properly-escaped mention (backticks or a fenced example) is never miscounted. A genuinely bare, unescaped mention outside code remains a known, inherent limitation of regex-based tag matching (shared by real HTML parsers given the same ambiguous input) — verified this can never lose data or hang, only reflow to a stable fixpoint on save. * fix(rich-md-editor): fix blockquoted-fence masking and void-tag balance scan - maskCodeRegions's fenced-code regex required fence markers at column 0, so a fence quoted inside a markdown blockquote (each line prefixed with `> `) wasn't recognized, leaving tag mentions inside it visible to the balance scanner. Extended the fence pattern to tolerate an optional blockquote prefix on both the opening and closing fence line. - BLOCK_HTML_TAG_NAMES includes several void elements (link, meta, base, hr, ...) that have no closing tag at all. The block tokenizer only treated an explicit self-closing `/>` as complete, so a void tag without one would scan the rest of the document for a `</meta>` that will never appear, risking a false match on a later same-name mention. Now reuses the existing VOID_TAGS set (already used by the inline tokenizer) to treat these as complete right after the open tag. Also restored `hr` to the whitelist, which was accidentally dropped when transcribing marked's tag list. * fix(rich-md-editor): tolerate an indented (non-blockquoted) fence in code masking maskCodeRegions's fence pattern handled a blockquoted fence (`> \`\`\``) but still required the fence marker at column 0 otherwise, missing CommonMark's independent up-to-3-space fence indent tolerance this codebase already relies on elsewhere (FENCE_OPEN/FENCE_CLOSE in markdown-parse.ts). An indented fence's tag-name mention could still end a whitelisted block early. Fixed by combining both allowances in one prefix pattern (zero-or-more blockquote levels, each independently followed by up to 3 more spaces of indent). * fix(rich-md-editor): mask HTML comments in balanced-tag scan A tag-name mention inside an HTML comment (e.g. `<!-- see </div> below -->`) inside a whitelisted raw HTML block could still be matched by the balance scan and end the block early, fragmenting it. maskCodeRegions already masked fenced/inline code the same way; extend it to mask comments too.
A workspace to build, deploy and manage AI agents and workflows.
Quickstart
Cloud-hosted: sim.ai
Self-hosted
npx simstudio
Docker must be installed and running. Use -p, --port <port> to run Sim on a different port, or --no-pull to skip pulling the latest Docker images.
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
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.
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).
Chat API Keys
Chat is a Sim-managed service. To use Chat on a self-hosted instance:
- Go to https://sim.ai → Settings → Chat keys and generate a Chat 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
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.
