# `LangExtract.Runner.Request`
[🔗](https://github.com/mdepolli/lang_extract/blob/v0.10.0/lib/lang_extract/runner/request.ex#L1)

A single chunk request through the runner's budget, with the runner's
retry policy.

Every attempt acquires from the Limiter first and releases after. The
policy per outcome:

  * `429` — pause the limiter globally until the server's `retry-after`
    deadline and retry. Rate-limit waits never consume the chunk's retry
    budget: the server asked us to wait, not to give up. When
    `retry-after` is absent the pause escalates exponentially from one
    backoff period (capped at 30s), and after `:rate_limit_retries`
    429s on one chunk (default 10) the chunk fails with the rate-limit
    error — bounded, unlike a budget, only by persistence of the 429s.
  * `5xx` / transport error — jittered exponential backoff, consumes one
    unit of `chunk_retries`; budget exhausted returns the last error.
  * any other error (4xx, parse-level) — returned immediately; a bad
    request never gets better by retrying.

Emits `[:lang_extract, :chunk, :retry]` before each retry with the
`attempt` number and a compact `reason`
(`:rate_limited` | `:server_error` | `:transport_error`).

Internal — no stability guarantees; see the README's "Stability"
section. Documented because it explains how the library works, not
because it is API.

# `infer`

```elixir
@spec infer(GenServer.server(), LangExtract.Client.t(), String.t(), keyword()) ::
  {:ok, LangExtract.Provider.Response.t()}
  | {:error, LangExtract.Provider.error()}
```

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