Add Vertex AI routing support (#753)

* add Vertex AI routing support

* include Vertex smokes in action CI

test/crossagent/vertexClaude.ts

@@ -0,0 +1,39 @@
+import type { AgentResult, TestRunnerOptions, ValidationCheck } from "../utils.ts";
+import { defineFixture } from "../utils.ts";
+
+const fixture = defineFixture(
+  {
+    prompt: `Call set_output with "VERTEX CLAUDE SMOKE PASSED".`,
+  },
+  { localOnly: true }
+);
+
+function validator(result: AgentResult): ValidationCheck[] {
+  const output = result.structuredOutput;
+  const setOutputCalled = output !== null;
+  const correctValue = setOutputCalled && /VERTEX CLAUDE SMOKE PASSED/i.test(output);
+
+  return [
+    { name: "set_output", passed: setOutputCalled },
+    { name: "correct_value", passed: correctValue },
+  ];
+}
+
+export const test: TestRunnerOptions = {
+  name: "vertex-claude",
+  agents: ["claude"],
+  fixture,
+  validator,
+  env: {
+    PULLFROG_DISABLE_SECURITY_INSTRUCTIONS: "1",
+    PULLFROG_MODEL: "vertex/byok",
+    VERTEX_MODEL_ID: "claude-haiku-4-5@20251001",
+    VERTEX_LOCATION: "global",
+  },
+  coverage: [
+    "action/models.ts",
+    "action/main.ts",
+    "action/agents/claude.ts",
+    "action/utils/{agent,apiKeys,vertex}.ts",
+  ],
+};

test/crossagent/vertexOpencode.ts

@@ -0,0 +1,39 @@
+import type { AgentResult, TestRunnerOptions, ValidationCheck } from "../utils.ts";
+import { defineFixture } from "../utils.ts";
+
+const fixture = defineFixture(
+  {
+    prompt: `Call set_output with "VERTEX OPENCODE SMOKE PASSED".`,
+  },
+  { localOnly: true }
+);
+
+function validator(result: AgentResult): ValidationCheck[] {
+  const output = result.structuredOutput;
+  const setOutputCalled = output !== null;
+  const correctValue = setOutputCalled && /VERTEX OPENCODE SMOKE PASSED/i.test(output);
+
+  return [
+    { name: "set_output", passed: setOutputCalled },
+    { name: "correct_value", passed: correctValue },
+  ];
+}
+
+export const test: TestRunnerOptions = {
+  name: "vertex-opencode",
+  agents: ["opencode"],
+  fixture,
+  validator,
+  env: {
+    PULLFROG_DISABLE_SECURITY_INSTRUCTIONS: "1",
+    PULLFROG_MODEL: "vertex/byok",
+    VERTEX_MODEL_ID: "gemini-2.5-flash",
+    VERTEX_LOCATION: "global",
+  },
+  coverage: [
+    "action/models.ts",
+    "action/main.ts",
+    "action/agents/opencode.ts",
+    "action/utils/{agent,apiKeys,vertex}.ts",
+  ],
+};