Félix Malfait
9e94045fa5
## Summary
App developers can now declare third-party OAuth integrations (GitHub,
Linear, Slack, etc.) in their manifest and the platform handles the full
authorize → callback → token-exchange → refresh → injection lifecycle.
The dev writes ~10 lines of config and reads tokens via
`useOAuth('linear')` inside any logic function.
```ts
// app/src/oauth-providers/linear.ts
export default defineOAuthProvider({
universalIdentifier: '...',
name: 'linear',
displayName: 'Linear',
authorizationEndpoint: 'https://linear.app/oauth/authorize',
tokenEndpoint: 'https://api.linear.app/oauth/token',
scopes: ['read', 'write'],
connectionMode: 'per-user',
clientIdVariable: 'LINEAR_CLIENT_ID',
clientSecretVariable: 'LINEAR_CLIENT_SECRET',
tokenRequestContentType: 'form-urlencoded',
});
// app/src/logic-functions/handlers/...
const { accessToken } = useOAuth('linear'); // throws OAuthNotConnectedError if missing
```
## Architecture
- **Storage**: extends the existing `connectedAccount` table — new
nullable `applicationOAuthProviderId` FK + new `app` value on the
`ConnectedAccountProvider` enum. Existing Google/Microsoft flows are
untouched.
- **OAuth flow**: a single `/apps/oauth/authorize` +
`/apps/oauth/callback` controller pair handles every app provider. State
travels in a JWT signed via the existing `JwtWrapperService` (new
`APP_OAUTH_STATE` token type).
- **Token exchange**: goes through
`SecureHttpClientService.createSsrfSafeFetch()` (so an installed app
can't point `tokenEndpoint` at internal hosts).
- **Refresh**: piggybacks on the existing
`ConnectedAccountRefreshTokensService` dispatch — Google/Microsoft
drivers untouched, new app driver lives engine-side under
`application-oauth-provider/refresh/`.
- **Injection**: the executor injects refreshed tokens as env vars
(`OAUTH_<NAME>_ACCESS_TOKEN`, `_HANDLE`, `_SCOPES`, `_CONNECTED`); the
SDK helpers `useOAuth` / `useOptionalOAuth` read them.
- **Frontend**: auto-rendered "OAuth Connections" section under each
app's settings tab (no custom front component needed). App-managed
connections are filtered out of `/settings/accounts` so the
email/calendar page stays focused.
- **Disconnect**: best-effort revoke against the manifest's
`revokeEndpoint` before deleting the row.
## Reference app
`packages/twenty-apps/internal/twenty-linear/` exercises the full
pipeline:
- `defineOAuthProvider` for Linear
- `POST /linear/create-issue` and `GET /linear/teams` HTTP-route logic
functions
- Vitest tests for the handlers
## Tests
- 14 server-side Jest tests: token-exchange util (form-urlencoded vs
JSON, PKCE, error paths), flow service (authorize URL shape, state
binding, ConnectedAccount upsert on first/reconnect, per-workspace mode,
invalid state)
- 8 app-level Vitest tests: handler error paths, GraphQL request shape,
Linear error propagation
- All 4 packages clean: `npx nx lint:diff-with-main` and `npx tsc
--noEmit`
## Test plan
- [ ] Apply migration on a dev DB: `npx nx run
twenty-server:database:migrate:prod`
- [ ] Regenerate frontend types: `npx nx run
twenty-front:graphql:generate --configuration=metadata`
- [ ] Create a Linear OAuth app at
https://linear.app/settings/api/applications/new with redirect URI
`<SERVER_URL>/apps/oauth/callback`
- [ ] Deploy + install `twenty-linear` on a workspace, paste the Linear
client id/secret into the app's variables
- [ ] Click "Connect Linear" in the app's settings tab → complete OAuth
→ verify `connectedAccount` row created with `provider = 'app'`
- [ ] Trigger `POST /linear/create-issue` with a valid teamId → verify
issue lands in Linear
- [ ] Disconnect → verify the row is deleted and (if Linear's revoke
endpoint is configured in the manifest) the revoke call fires
- [ ] Verify `/settings/accounts` does NOT show the Linear connection —
it appears only under the Linear app's settings tab
## Out of scope (deliberately)
- **Cron + per-user providers**: a cron-triggered function with a
per-user OAuth provider currently returns `CONNECTED=false` (no user
context). The follow-up design is `useOAuthForUser(name,
userWorkspaceId)` paired with a `POST /apps/oauth/connection-token`
endpoint, deferred to keep this PR focused.
- **Token encryption at rest**: tokens stored as plain `varchar`
matching the existing Google/Microsoft pattern. Worth a separate
cross-cutting PR.
- **Manifest endpoint pinning**: a malicious app upgrade could change
`tokenEndpoint` silently. Same trust model as logic-function source code
(which already runs arbitrary server-side); worth tightening across the
whole upgrade pipeline rather than just OAuth.
- **CLI helpers** (`twenty oauth show-callback-url`, `twenty oauth
connect`): manual setup for v1.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Linear for Twenty
Connect your Linear account to Twenty to create issues and look up teams straight from your workflows or the AI chat.
What you can do
Once installed and connected, two tools become available:
- Create Linear issue — from the AI chat, ask something like
"create a Linear issue in the Engineering team titled 'Fix login bug'"
and the AI will file it for you. From a workflow, add it as a step
with
teamId+title(and optionaldescription). - List Linear teams — discovers the teams in your Linear workspace,
useful when you need to pick a
teamIdfor the create-issue step.
Installing
- Open Settings → Applications in your Twenty workspace.
- Find Linear in the available apps and click Install.
- Open the app, go to the Connections tab, and click Add connection.
- Choose Just for me (your personal Linear account) or Workspace shared (a team-managed Linear account anyone in this workspace can act through), then complete the Linear sign-in.
That's it — you can now use the tools above.
If you see a "Linear OAuth is not yet set up by your server administrator" notice on the Connections tab, ask your Twenty admin to follow the Self-hosting setup below — they need to provide the OAuth credentials before connections can be added.
Self-hosting setup
This section is for Twenty server admins. If you're on Twenty Cloud, skip this — the OAuth credentials are already configured.
1. Register an OAuth app in Linear
- Visit https://linear.app/settings/api/applications/new.
- Set the Redirect URI to
<SERVER_URL>/apps/oauth/callback(for local dev:http://localhost:3000/apps/oauth/callback). - Copy the generated Client ID and Client Secret.
2. Wire the credentials into Twenty
- In Settings → Applications, find Linear, click into it, and go to the Application registration tab (admin-only).
- Paste your Linear Client ID into
LINEAR_CLIENT_IDand the Client Secret intoLINEAR_CLIENT_SECRET.
Workspace users will now be able to add Linear connections from the Connections tab as described above.
3. (Developers only) Building the app from source
If you're working on this app rather than installing the published version:
cd packages/twenty-apps/internal/twenty-linear
yarn twenty deploy
This serves as the reference implementation for Twenty's
defineConnectionProvider({ type: 'oauth' }) flow — useful as a template
when adding OAuth integrations for other providers.