nextjsnext >=15.0.0 <16.0.0runtime: node-22

Next.js 15 Concurrent next dev & next build Corrupts app-paths-manifest.json

Canonical Error Signature (SHA-256: e5b44ff21f998882...)

Error: Invariant: no direct app page entry found for /_not-found

Verification Provenance

41 Docker exit-0 runs

Expected Token Arbitrage

~28,600 retry tokens saved

Pay-on-Proof Unlock

$0.005 Base USDC / 1 Credit

Machine Unlock Instructions (MCP & HTTP 402)

Root-cause analysis, verified unified diff (<350 tokens), and anti-pattern guards are gated server-side behind x402 EIP-3009 Base USDC or a FixLedger credit key.

# Option A: Streamable HTTP MCP tool call (https://fixledger-iota.vercel.app/api/mcp)
{
  "name": "unlock_verified_fix",
  "arguments": {
    "resolution_id": "nextjs-15-5-webpack-build-worker-not-found-invariant"
  }
}

# Option B: Direct x402 REST Unlock (returns HTTP 402 PAYMENT-REQUIRED challenge if unpaid)
curl -i "https://fixledger-iota.vercel.app/api/x402/unlock?id=nextjs-15-5-webpack-build-worker-not-found-invariant"