FIX: dont crash on startup on Node versions without std

[scott-huberty]

Requirement or Bug

#4097

Bug Reproduction Steps

1. Use Node 23.0–23.7 (reproduced on v23.6.0). This is inside the published engines range >=22.19.0.
2. npm install -g @moonshot-ai/kimi-code. The install succeeds.
3. Run kimi. It crashes immediately:

import zlib, { createZstdDecompress, gzip } from "node:zlib";
               ^^^^^^^^^^^^^^^^^^^^
SyntaxError: The requested module 'node:zlib' does not provide an export named 'createZstdDecompress'

Root Cause

Node added zlib.createZstdDecompress in v23.8.0 and backported it to v22.15.0 (LTS). So every 22.x from 22.15 on has it, but 23.0–23.7 don't. The package's engines (>=22.19.0) still accepts 23.0–23.7:

kimi-code/apps/kimi-code/package.json

Line 115 in 21406fb

"node": ">=22.19.0"

by the looks of it,apps/kimi-code/src/cli/update/native-stage.ts is meant to handle runtimes without zstd:

kimi-code/apps/kimi-code/src/cli/update/native-stage.ts

Line 498 in 21406fb

if (compressed !== undefined && typeof createZstdDecompress === 'function') {

But createZstdDecompress is imported at the top of the file, so on 23.0–23.7 this causes an error..

Code Changes

Replace the named import of createZstdDecompress with a default zlib import, so a runtime that lacks zstd proceeds through to the existing fallback instead of failing when the module loads.

Behavior Changes and Affected Users

Behavior	Before	After	Who relies on the old behavior	Escape hatch
kimi startup on Node 23.0–23.7	Crashes with SyntaxError	Starts normally	Nobody	N/A

Checklist

• I have read the CONTRIBUTING document.
• I have linked a related issue (external PRs: issue must have a maintainer's /approve).
• I have added tests that prove my feature works.
• The behavior-change table above is complete, and every removed behavior or flipped default is named in the changeset and either has an escape hatch or was explicitly approved by a maintainer in this PR.
• Ran gen-changesets skill, or this PR needs no changeset.
• Ran gen-docs skill, or this PR needs no doc update.

[changeset-bot]

🦋 Changeset detected

Latest commit: ba46744

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@moonshot-ai/kimi-code	Patch

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[scott-huberty]

I did not include a regression test.. Perhaps running the tests on a CI with Node 23.6.0 will suffice?