[xunguangzlj-cloud]

Problem

A failed native binary download can leave an empty or partial file at the install path. The next postinstall sees that file and skips the download.

Change

Stream the response to a temporary file in the binary directory. Move it into place after the stream finishes and the file has content. Clean up the temporary file if the request or write fails.

Verification

• Reproduced the stale file on the base commit with an HTTP 404, an interrupted response, and an empty HTTP 200 response.
• Each regression retries through an HTTP redirect and verifies that the final file contains the complete response.
• All seven launcher and postinstall tests passed on Node 24.16.0 under Ubuntu. The three postinstall cases also passed on Windows. The tests use a loopback server and a temporary package directory.
• The version sync and diff checks passed.

Authored with OpenAI Codex (GPT-6).

[vercel]

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