[user-github-me]

Cancelling a large download from the CLI's local project server unpipes the response but leaves its paused ReadStream and file handle open. Destroy the stream when the response closes, covering cancelled and completed requests through the same file-serving helper. Native and cached proxy assets both use this path.

The current-main integration preserves its new in-process server behavior and tests.

Validation:

• All 51 static-server and play tests pass, including full, open-ended Range, bounded Range and proxy download cancellation.
• Prior source and built CLI checks with real 32 MiB files confirm cancelled streams close and release their descriptors; completed 200 and 206 responses return all expected bytes.
• Full workspace build, CLI typecheck, lint, formatting, comment gates and normal commit hooks pass.

[jrusso1020]

serveFileWithRange pipes a ReadStream into the response, and when the client disconnects pipe unpipes but leaves the paused stream and its fd open; destroying the stream on the response's close fixes that for full, ranged and cached-proxy responses, which all funnel through this helper. Main still lacks the listener. On a normal completion close fires after finish, when the stream has already ended, so the destroy is a no-op and cannot truncate output, including on the in-process socket-pair path. The test spies createReadStream, disconnects after the first chunk, and polls until the stream is closed and destroyed for all four request shapes, then checks the server still answers. Need: yes · Size: ok · Reuse: n/a · Simpler: one line, already minimal.

— Rames