# libtmux.async/completion-stage

- **Module:** libtmux.async
- **Package:** io.github.libtmux:libtmux-clojure
- **Language:** Clojure
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-java/blob/5f88402151ff08fc0390dd438b90963692ec3fe4/libtmux-clojure/src/main/clojure/libtmux/async.clj#L101
- **Public owner:** libtmux.async
- **Page:** https://libtmux.org/en/clojure/latest/reference/libtmux-async-completion-stage/

```
(completion-stage task)
```

Returns a read-only CompletionStage completed after worker cleanup.

Completing or cancelling a derived CompletableFuture does not control the
task; use [[cancel!]]. Caller-attached callbacks follow Java stage scheduling.
[[then!]] schedules bounded continuations; [[task-state]] exposes pending cleanup.

## Parameters

- `task` (`libtmux.async.Task`)