{
  "context": "Tests whether the agent proactively applies a broad range of PostgreSQL best practices -- pool configuration, parameterized queries, ANY for array filtering, unnest for bulk inserts, error code handling, proper migration patterns -- when building a content platform. The task describes only business requirements.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Pool with production settings",
      "description": "db.ts creates a pg Pool with max connections, at least one timeout setting, and keepAlive: true",
      "max_score": 7
    },
    {
      "name": "Parameterized queries throughout",
      "description": "ALL query functions use $1, $2 placeholders -- no string interpolation or concatenation of variables into SQL",
      "max_score": 10
    },
    {
      "name": "Bulk import uses unnest or multi-row VALUES",
      "description": "The bulk article import inserts all articles in a single query (or minimal queries) using unnest or multi-row VALUES -- NOT a loop of individual INSERTs",
      "max_score": 14
    },
    {
      "name": "ANY or overlap for tag search",
      "description": "Searching by tags uses && (overlap) with $1::text[] or ANY -- NOT a dynamically constructed IN clause",
      "max_score": 10
    },
    {
      "name": "ANY for multi-status filter",
      "description": "Filtering by multiple statuses uses ANY($1::text[]) with a single array parameter -- NOT dynamically building IN placeholders",
      "max_score": 10
    },
    {
      "name": "Foreign key violation handling",
      "description": "Creating an article catches PostgreSQL error code 23503 (foreign_key_violation) when author_id doesn't exist and returns a meaningful error",
      "max_score": 10
    },
    {
      "name": "RETURNING clause on INSERT/UPDATE",
      "description": "INSERT and UPDATE queries include RETURNING * or RETURNING with columns",
      "max_score": 5
    },
    {
      "name": "pool.query for single queries",
      "description": "Non-transactional query functions use pool.query() directly",
      "max_score": 5
    },
    {
      "name": "Pool error handler and shutdown",
      "description": "pool.on('error', ...) is registered AND pool.end() is called on SIGTERM/SIGINT",
      "max_score": 5
    },
    {
      "name": "TIMESTAMPTZ in migration",
      "description": "Migration uses TIMESTAMPTZ (not TIMESTAMP) for all time columns",
      "max_score": 5
    },
    {
      "name": "CHECK constraint on status",
      "description": "Migration includes a CHECK constraint on the articles.status column",
      "max_score": 5
    },
    {
      "name": "Index on foreign key",
      "description": "Migration creates an index on articles.author_id",
      "max_score": 5
    },
    {
      "name": "Unique constraint on author email",
      "description": "Migration includes a UNIQUE constraint on authors.email",
      "max_score": 5
    },
    {
      "name": "No individual Client instances",
      "description": "Code never uses new Client() -- only the Pool is used for all database access",
      "max_score": 4
    }
  ]
}