# user-engine application binding

| Field | Value |
|-------|--------|
| application id | `coulomb-social` (`USER_ENGINE_APPLICATION_ID`) |
| display name | coulomb.social |
| tenant (v1) | `binky` (client #1) |
| identity link | `(issuer, sub)` → `user_engine_user_id` on first login |
| local row | `members.Member` (no passwords) |

## Runtime

| Mode | Behavior |
|------|----------|
| `USER_ENGINE_BASE_URL` empty | `StubUserEngineClient` — deterministic user id from issuer+sub hash |
| URL set | `HttpUserEngineClient` placeholder (T04: wire real link/projection API) |

## Profile attributes (shell only)

- display name (from OIDC `name` / `preferred_username`)
- email (optional)

Bubble content fields are **not** part of this binding.