fix: infer perplexity baseUrl from api key

src/agents/tools/web-search.test.ts

@@ -0,0 +1,59 @@
+import { describe, expect, it } from "vitest";
+
+import { __testing } from "./web-search.js";
+
+const { inferPerplexityBaseUrlFromApiKey, resolvePerplexityBaseUrl } = __testing;
+
+describe("web_search perplexity baseUrl defaults", () => {
+  it("detects a Perplexity key prefix", () => {
+    expect(inferPerplexityBaseUrlFromApiKey("pplx-123")).toBe("direct");
+  });
+
+  it("detects an OpenRouter key prefix", () => {
+    expect(inferPerplexityBaseUrlFromApiKey("sk-or-v1-123")).toBe("openrouter");
+  });
+
+  it("returns undefined for unknown key formats", () => {
+    expect(inferPerplexityBaseUrlFromApiKey("unknown-key")).toBeUndefined();
+  });
+
+  it("prefers explicit baseUrl over key-based defaults", () => {
+    expect(
+      resolvePerplexityBaseUrl(
+        { baseUrl: "https://example.com" },
+        "config",
+        "pplx-123",
+      ),
+    ).toBe("https://example.com");
+  });
+
+  it("defaults to direct when using PERPLEXITY_API_KEY", () => {
+    expect(resolvePerplexityBaseUrl(undefined, "perplexity_env")).toBe(
+      "https://api.perplexity.ai",
+    );
+  });
+
+  it("defaults to OpenRouter when using OPENROUTER_API_KEY", () => {
+    expect(resolvePerplexityBaseUrl(undefined, "openrouter_env")).toBe(
+      "https://openrouter.ai/api/v1",
+    );
+  });
+
+  it("defaults to direct when config key looks like Perplexity", () => {
+    expect(resolvePerplexityBaseUrl(undefined, "config", "pplx-123")).toBe(
+      "https://api.perplexity.ai",
+    );
+  });
+
+  it("defaults to OpenRouter when config key looks like OpenRouter", () => {
+    expect(resolvePerplexityBaseUrl(undefined, "config", "sk-or-v1-123")).toBe(
+      "https://openrouter.ai/api/v1",
+    );
+  });
+
+  it("defaults to OpenRouter for unknown config key formats", () => {
+    expect(resolvePerplexityBaseUrl(undefined, "config", "weird-key")).toBe(
+      "https://openrouter.ai/api/v1",
+    );
+  });
+});