One registry line — `"openai": StaticKey`. The generic static-key adapter
already serves any vendor (accept is the vendor-independent seal, deliver is the
value unchanged, and refresh/identity/usage are not implemented), so a second
static-key vendor is data, not code. The shape-selection test now asserts
For("openai") reports static-key.
Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF