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Vercel Serverless Function 10s Execution Timeout on LLM Streaming

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🎯 Target Goal & Friction

Goal: Increase Vercel Serverless Function maxDuration for long AI streams

Error Signature: FUNCTION_INVOCATION_TIMEOUT: Task timed out after 10.00 seconds

⚡ Direct Teleport Deep Link (0ms Navigation)

https://vercel.com/{team}/{project}/settings/functions →

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Verified Code / Configuration Diff

@@ app/api/chat/route.ts @@
+ export const maxDuration = 60; // Set timeout up to 60s (Pro) or 300s
+ export const dynamic = 'force-dynamic';

1-Line Instant CLI Fix

vercel deploy --prod

Root Cause & Explanation

Next.js Route Handlers on Vercel default to a 10s timeout on Hobby and 15s on Pro. Long LLM reasoning chains require `export const maxDuration`.