require-vercel-valid-json

Require vercel.json to be valid JSON.

Targeted pattern scope

JSON syntax validity of vercel.json.

What this rule reports

This rule reports parse-invalid vercel.json configuration files.

Why this rule exists

Syntax-invalid provider config often slips through reviews and then fails at runtime/deploy time. Catching it in lint keeps config quality gates local.

❌ Incorrect

{"buildCommand": "npm run build",}

✅ Correct

{
  "buildCommand": "npm run build"
}

When not to use it

Disable this rule if vercel.json is generated and validated by another trusted step before deployment.

Rule catalog ID: R092

Targeted pattern scope​

What this rule reports​

Why this rule exists​

❌ Incorrect​

✅ Correct​

When not to use it​

Further reading​