[blob] feat: add useCache option to bypass CDN cache

[vvo]

Summary

Adds a useCache option to blob.get() that controls whether to fetch from CDN cache or directly from origin storage:

• useCache: true (default) - allows blob to be served from CDN cache
• useCache: false - fetches directly from origin storage

Note: Only effective for private blobs. Public blobs always use CDN cache.

Why

This is useful when you need the latest version of a blob immediately after an update, bypassing any cached responses.

Usage

const { stream, blob } = await get('my-file.txt', {
  access: 'private',
  useCache: false, // fetch directly from origin
});

Test plan

• Added tests for useCache: false appending ?cache=0
• Added tests for useCache: true and omitted not appending query param
• Added tests verifying returned downloadUrl doesn't include cache=0
• All SDK tests passing

🤖 Generated with Claude Code

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Latest commit: e121acd

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Project	Deployment	Review	Updated (UTC)
vercel-storage-next-integration-test-suite	Ready	Preview	Jan 28, 2026 4:58pm