Function isPlainObject

packages/opencode/src/provider/transform.ts:1331–1333

(value: unknown)

type JsonRecord = Record<string, unknown>

function isPlainObject(value: unknown): value is JsonRecord {
  return typeof value === "object" && value !== null && !Array.isArray(value)
}

// Mirrors Codex's Rust JSON schema compatibility lowering for OpenAI tool schemas.
function sanitizeOpenAISchema(value: unknown): unknown {