diff --git a/src/app/core/models/Trace.ts b/src/app/core/models/Trace.ts
index 939da50e..ddf19a31 100644
--- a/src/app/core/models/Trace.ts
+++ b/src/app/core/models/Trace.ts
@@ -265,18 +265,18 @@ function buildPromotedAttrsCandidate(raw: RawSpan): Record<string, unknown> {
 
 const InvokeAgentTightening = z.object({
   attrConversationId: z.string({
-    error: `'${GEN_AI_CONVERSATION_ID}' is required on '${
+    message: `'${GEN_AI_CONVERSATION_ID}' is required on '${
         OPERATION_INVOKE_AGENT}' spans`,
   }),
 });
 
 const GenerateContentTightening = z.object({
   attrEventId: z.string({
-    error: `'${GCP_VERTEX_AGENT_EVENT_ID}' is required on '${
+    message: `'${GCP_VERTEX_AGENT_EVENT_ID}' is required on '${
         OPERATION_GENERATE_CONTENT}' spans`,
   }),
   attrInvocationId: z.string({
-    error: `'${GCP_VERTEX_AGENT_INVOCATION_ID}' is required on '${
+    message: `'${GCP_VERTEX_AGENT_INVOCATION_ID}' is required on '${
         OPERATION_GENERATE_CONTENT}' spans`,
   }),
 });
@@ -400,7 +400,7 @@ export type ValidatedSpan =
  */
 function forwardIssues(
   ctx: { addIssue(arg: any): void },
-  issues: readonly z.core.$ZodIssue[],
+  issues: readonly z.ZodIssue[],
 ): void {
   for (const issue of issues) {
     ctx.addIssue(issue as any);
@@ -455,7 +455,7 @@ function parsePromotedAttrs<T extends z.ZodObject<any>>(
  * payload (rather than the post-validation typed projection, which
  * duplicates information and is unfamiliar to anyone outside ADK Web).
  */
-export const SpanValidator: z.ZodType<ValidatedSpan, unknown> =
+export const SpanValidator: z.ZodType<ValidatedSpan> =
     z.unknown().transform((rawInput, ctx): ValidatedSpan => {
       const parseResult = RawSpanValidator.safeParse(rawInput);
       if (!parseResult.success) {
@@ -529,7 +529,7 @@ export const SpanValidator: z.ZodType<ValidatedSpan, unknown> =
         ...(io !== undefined ? { io } : {}),
       };
       return result;
-    }) as z.ZodType<ValidatedSpan, unknown>;
+    }) as z.ZodType<ValidatedSpan>;
 
 // ---------------------------------------------------------------------------
 // UI-facing Span type — adds a `children` tree-structure helper on top of
diff --git a/src/app/core/models/trace/ExperimentalSemconv.ts b/src/app/core/models/trace/ExperimentalSemconv.ts
index 8507f660..f2a36274 100644
--- a/src/app/core/models/trace/ExperimentalSemconv.ts
+++ b/src/app/core/models/trace/ExperimentalSemconv.ts
@@ -191,7 +191,7 @@ export const CompletionDetailsLogAttributesValidator = z.object({
       ResponseFinishReasonsAttrValidator.optional(),
   [GEN_AI_USAGE_INPUT_TOKENS]: UsageTokensAttrValidator.optional(),
   [GEN_AI_USAGE_OUTPUT_TOKENS]: UsageTokensAttrValidator.optional(),
-}).loose();  // Unknown common attributes (e.g. `gen_ai.agent.name`,
+}).passthrough();  // Unknown common attributes (e.g. `gen_ai.agent.name`,
              // `gcp.vertex.agent.event_id`) are allowed through unchanged.
 
 export const CompletionDetailsLogValidator = z.object({
diff --git a/src/app/core/services/eval.service.spec.ts b/src/app/core/services/eval.service.spec.ts
index 554d3ec1..da054870 100644
--- a/src/app/core/services/eval.service.spec.ts
+++ b/src/app/core/services/eval.service.spec.ts
@@ -34,11 +34,11 @@ const EVAL_ID = 'eval1';
 const EVAL_RESULT_ID = 'result1';
 const USER_ID = 'user1';
 const SESSION_ID = 'session1';
-const EVAL_SETS_PATH = `/apps/${APP_NAME}/eval_sets`;
+const EVAL_SETS_PATH = `/dev/apps/${APP_NAME}/eval_sets`;
 const EVAL_SET_PATH = `${EVAL_SETS_PATH}/${EVAL_SET_ID}`;
 const EVAL_CASES_PATH = `${EVAL_SET_PATH}/evals`;
 const EVAL_CASE_PATH = `${EVAL_CASES_PATH}/${EVAL_CASE_ID}`;
-const EVAL_RESULTS_PATH = `/apps/${APP_NAME}/eval_results`;
+const EVAL_RESULTS_PATH = `/dev/apps/${APP_NAME}/eval_results`;
 const EVAL_RESULT_PATH = `${EVAL_RESULTS_PATH}/${EVAL_RESULT_ID}`;
 const ADD_SESSION_PATH = `${EVAL_SET_PATH}/add_session`;
 const RUN_EVAL_PATH = `${EVAL_SET_PATH}/run_eval`;
@@ -92,7 +92,7 @@ describe('EvalService', () => {
     it('should call POST /apps/{appName}/eval-sets with correct body', () => {
       service.createNewEvalSet(APP_NAME, EVAL_SET_ID).subscribe();
       const req = httpTestingController.expectOne(
-          API_SERVER_BASE_URL + `/apps/${APP_NAME}/eval-sets`,
+          API_SERVER_BASE_URL + `/dev/apps/${APP_NAME}/eval-sets`,
       );
       expect(req.request.method).toEqual('POST');
       expect(req.request.body).toEqual({
@@ -111,7 +111,7 @@ describe('EvalService', () => {
       const resultP = firstValueFrom(
           service.createNewEvalSet(APP_NAME, EVAL_SET_ID),
       );
-      const req = httpTestingController.expectOne(`/apps/${APP_NAME}/eval-sets`);
+      const req = httpTestingController.expectOne(`/dev/apps/${APP_NAME}/eval-sets`);
       req.flush(null);
       const result = await resultP;
       expect(result).toBeNull();
diff --git a/src/assets/config/runtime-config.json b/src/assets/config/runtime-config.json
index 71ca9149..c8f49d88 100644
--- a/src/assets/config/runtime-config.json
+++ b/src/assets/config/runtime-config.json
@@ -1,3 +1,3 @@
 {
-  "backendUrl": "http://127.0.0.1:8000"
+  "backendUrl": ""
 }
\ No newline at end of file