chore: import upstream snapshot with attribution

apps/sim/lib/copilot/tools/server/generated-schema.ts

@@ -0,0 +1,49 @@
+import Ajv, { type ErrorObject, type ValidateFunction } from 'ajv'
+import { TOOL_RUNTIME_SCHEMAS } from '@/lib/copilot/generated/tool-schemas-v1'
+
+const ajv = new Ajv({
+  allErrors: true,
+  strict: false,
+})
+
+const validatorCache = new Map<string, ValidateFunction>()
+
+function formatErrors(errors: ErrorObject[] | null | undefined): string {
+  if (!errors || errors.length === 0) return 'unknown validation error'
+  return errors
+    .slice(0, 5)
+    .map((error) => `${error.instancePath || '/'} ${error.message || 'is invalid'}`.trim())
+    .join('; ')
+}
+
+function getValidator(
+  toolName: string,
+  schemaKind: 'parameters' | 'resultSchema'
+): ValidateFunction | null {
+  const cacheKey = `${toolName}:${schemaKind}`
+  const cached = validatorCache.get(cacheKey)
+  if (cached) return cached
+
+  const schema = TOOL_RUNTIME_SCHEMAS[toolName]?.[schemaKind]
+  if (!schema) return null
+
+  const validator = ajv.compile(schema as object)
+  validatorCache.set(cacheKey, validator)
+  return validator
+}
+
+export function validateGeneratedToolPayload<T>(
+  toolName: string,
+  schemaKind: 'parameters' | 'resultSchema',
+  payload: T
+): T {
+  const validator = getValidator(toolName, schemaKind)
+  if (!validator) return payload
+
+  if (!validator(payload)) {
+    const label = schemaKind === 'parameters' ? 'input' : 'output'
+    throw new Error(`${toolName} ${label} validation failed: ${formatErrors(validator.errors)}`)
+  }
+
+  return payload
+}