Keeps coding agents on your design system: catches palette colors, native elements and APIs your system lacks, at every edit and pull request, with the fix. Set it up once in your design-system package; every app in your monorepo gets it.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add onsystem -- npx -y onsystem~/.codex/config.toml
[mcp_servers.onsystem]
command = "npx"
args = ["-y", "onsystem"]
# codex mcp add onsystem -- npx -y onsystem~/.cursor/mcp.json
{
"mcpServers": {
"onsystem": {
"command": "npx",
"args": [
"-y",
"onsystem"
]
}
}
}.vscode/mcp.json
{
"servers": {
"onsystem": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"onsystem"
]
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"onsystem": {
"command": "npx",
"args": [
"-y",
"onsystem"
]
}
}
}claude_desktop_config.json
{
"mcpServers": {
"onsystem": {
"command": "npx",
"args": [
"-y",
"onsystem"
]
}
}
}.trae/mcp.json
{
"mcpServers": {
"onsystem": {
"command": "npx",
"args": [
"-y",
"onsystem"
]
}
}
}