fix(edge): meter and size-cap knowledge embeddings in embed-chunks and search-knowledge

server/supabase/functions/_shared/json-response.ts

@@ -0,0 +1,30 @@
+// server/supabase/functions/_shared/json-response.ts
+// JSON response + auth-error mapping shared by the knowledge functions.
+
+import { corsHeaders } from './cors.ts'
+import type { AuthError } from './auth.ts'
+
+export function jsonResponse(status: number, body: Record<string, unknown>): Response {
+  return new Response(JSON.stringify(body), {
+    status,
+    headers: { ...corsHeaders, 'Content-Type': 'application/json' },
+  })
+}
+
+export function isAuthError(error: unknown): error is AuthError {
+  return Boolean(
+    error
+    && typeof error === 'object'
+    && 'status' in error
+    && (error.status === 401 || error.status === 403)
+    && 'message' in error
+    && typeof error.message === 'string',
+  )
+}
+
+/** Map a thrown value to a response: auth errors keep their status, anything else is a 500. */
+export function errorResponse(error: unknown): Response {
+  // Same shape as auth.ts authErrorResponse, without loading the Supabase client.
+  if (isAuthError(error)) return jsonResponse(error.status, { error: error.message })
+  return jsonResponse(500, { error: 'internal_error' })
+}