# `ASM.ProviderBackend.SdkUnavailableError`
[🔗](https://github.com/nshkrdotcom/agent_session_manager/blob/v0.10.0/lib/asm/provider_backend/sdk_unavailable_error.ex#L1)

Stable cause category for explicit SDK-lane requests that cannot run.

The public ASM boundary still returns `%ASM.Error{}` for runtime/config
failures. This struct is stored in `ASM.Error.cause` so tests and callers can
distinguish SDK unavailability from unrelated configuration failures without
matching message text.

# `t`

```elixir
@type t() :: %ASM.ProviderBackend.SdkUnavailableError{
  __exception__: true,
  execution_mode: atom() | nil,
  lane: atom() | nil,
  message: String.t(),
  provider: atom() | nil,
  reason: atom(),
  runtime: module() | nil
}
```

---

*Consult [api-reference.md](api-reference.md) for complete listing*