[lautaropaske]

Summary

The "exists error in production @ vercel (open-silver)" alert fired for /api/grade because AI Gateway started returning a deprecation warning for AI SDK 5. The SDK printed it to stderr, and Vercel tags stderr as ERROR. This PR fixes the cause: the SDK moves to v6, so the gateway no longer sends the warning.

-"ai": "^5.0.223"            +"ai": "^6.0.322"
-"@ai-sdk/gateway": "^4.0.115"  +"^3.0.228"   # v4 is the ai v7 line
-"@ai-sdk/react": "^4.0.154"    +"^3.0.325"   # v4 is the ai v7 line
-"@ai-sdk/google": "^2.0.86"    +"^3.0.141"
-"@ai-sdk/openai": "^2.0.117"   +"^3.0.136"
-"@ai-sdk/xai": "^2.0.84"       +"^3.0.149"

Every package is pinned to its ai-v6 dist-tag line. @ai-sdk/gateway and @ai-sdk/react were already on 4.x, which belongs to the v7 line, so they move to 3.x to match. That leaves one ai and one gateway in the tree.

The only breaking change that touched code: LanguageModelUsage now requires inputTokenDetails and outputTokenDetails. That's in a test fixture in tests/api/grade.test.ts. No app code changed.

Evidence

• Before (production, v5): since 2026-11-03 03:07 UTC, each graded request also logs at ERROR:
  (node:8) Warning: AI SDK Warning: AI Gateway support for AI SDK 5 is deprecated. Upgrade to AI SDK 6 or later…
  All 11 affected requests returned 200 with outcome: graded.
• After (this PR's preview, v6): POST /api/grade with public/a_resume.pdf returned 200, grade A, in 18s. Runtime logs show only {"http.route":"/api/grade","outcome":"graded",…,"finishReason":"stop"}, with no AI SDK warning and no stderr line.
• bunx tsc --noEmit, bun run lint and bun run test (195/195) all pass.

Merge Danger

Door: two-way

This is a dependency bump; reverting the commit undoes it.

Blast Radius: AI routes

/api/grade was checked live on the preview. Roast-me (streamObject and experimental_useObject) passes tsc and its tests, but wasn't run live.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated
open-silver	Ready	Preview	Nov 3, 2026 11:34am UTC