Builder.io Adding Workspace Apps
Classify The Ask First
When a user asks from Dispatch chat or through @agent-native in Slack or
Telegram to create, build, make, scaffold, or generate an "agent", classify
the ask first.
Simple Dispatch-native behavior such as a reminder, digest, monitor, routing
rule, saved instruction, or recurring workflow can stay in Dispatch as a
recurring job/resource/destination. Robust unique products or teammates that
need their own UI, data model, actions, integrations, or domain workflow should
become a separate workspace app under apps/<app-name>, mounted at
/<app-name>.
Where The App Lives
Do not implement a new app by adding a route, page, component, or file to
apps/chat or another existing app unless the user explicitly asks to modify
that existing app.
Vault Access
Dispatch vault access is workspace-wide by default: every saved vault key is available to every workspace app. Only create or request per-app vault grants when Dispatch's vault access setting is switched to manual mode.
When an app needs a provider credential, use the app's scoped secret or
workspace-connection resolver so Dispatch remains the source of truth. Do not
ask a non-admin builder to add a key to local project settings or .env; use
Dispatch's vault request workflow for a missing key and keep the value out of
app code.
Discovery, Links, And The UI Stack
Workspace apps are discovered from apps/<app-name>/package.json. There is no
separate workspace app registry to edit for Dispatch to list the app. Always
save a concise, human-readable description there; Dispatch lists and A2A
connected-agent context use the app name plus description so agents know what
the app does. Use relative workspace links like /<app-name> and never
hardcode localhost, 127.0.0.1, 8080, 8100, or any dev port in app
cards, instructions, redirects, or navigation; the active workspace
gateway/browser origin owns the port. React Router apps must preserve
APP_BASE_PATH / VITE_APP_BASE_PATH in
app/entry.client.tsx via appBasePath() so the app hydrates correctly when
mounted at /<app-name>. Use the framework/template UI stack for standard UI:
shadcn/ui components and @tabler/icons-react. Do not add lucide-react or
another icon library. Read .agents/skills/shadcn-ui/SKILL.md before adding,
updating, or debugging shadcn components.
App Data Goes Through Actions
Normal app data must flow through actions. For CRUD that the agent can perform,
create defineAction files in actions/, mark reads with
http: { method: "GET" }, and call them from React with useActionQuery /
useActionMutation. Do not add duplicate JSON CRUD routes under /api/* for
the same data unless the route is for uploads, streaming, webhooks, OAuth, or
another route-only concern. Do not add routes whose main job is to wrap,
proxy, or re-export an action; the action endpoint already exists at
/_agent-native/actions/:name. Action-backed UI is what makes agent-created or
agent-edited records appear without a manual refresh.
PostgreSQL Database
App database code targets local PGlite and hosted Postgres. Define schemas with
@agent-native/core/db/schema helpers and write app reads/writes with Drizzle's
PostgreSQL query builder and drizzle-orm operators. Do not import raw schema
drivers in app templates. Keep raw SQL
for additive migrations, health checks, or carefully scoped maintenance. Do not use SQL as object
storage; file bytes belong in upload/private-blob providers with only references
saved to app tables.
Scaffolding
In local development, run
pnpm exec agent-native create <app-name> --template=<template> from the
workspace root. In production, Dispatch posts new-app requests to Builder
branch creation; Builder should still scaffold the separate workspace app. The
workspace dev gateway (pnpm dev) detects new apps/<app-name> directories
automatically.
Finishing A Chat-Template App
When using the chat template, treat it as scaffolding only. The finished app
must be branded as the requested app, with its own home screen, navigation,
package metadata, manifest, and domain workflow. Do not leave visible
Chat, Starter, Blank app, Start building, or New app UI in a chat-derived
app.
Related Skills
- workspace-conventions — Shared workspace rules this workflow assumes.
- actions — How to define the app operations the agent and UI share.
- composable-mini-apps — Splitting work across focused sibling apps.
- portability — Keeping PostgreSQL and hosting assumptions explicit.
- shadcn-ui — Adding and upgrading the UI primitives.