fix(agents): fix Brave llm-context empty snippets (#41387)

Merged via squash.

Prepared head SHA: 1e6f1d9d51
Co-authored-by: zheliu2 <15888718+zheliu2@users.noreply.github.com>
Co-authored-by: obviyus <22031114+obviyus@users.noreply.github.com>
Reviewed-by: @obviyus

CHANGELOG.md

@@ -41,6 +41,7 @@ Docs: https://docs.openclaw.ai
 - Agents/fallback: treat HTTP 499 responses as transient in both raw-text and structured failover paths so Anthropic-style client-closed overload responses trigger model fallback reliably. (#41468) thanks @zeroasterisk.
 - Plugins/context-engine model auth: expose `runtime.modelAuth` and plugin-sdk auth helpers so plugins can resolve provider/model API keys through the normal auth pipeline. (#41090) thanks @xinhuagu.
 - CLI/memory teardown: close cached memory search/index managers in the one-shot CLI shutdown path so watcher-backed memory caches no longer keep completed CLI runs alive after output finishes. (#40389) thanks @Julbarth.
+- Tools/web search: treat Brave `llm-context` grounding snippets as plain strings so `web_search` no longer returns empty snippet arrays in LLM Context mode. (#41387) thanks @zheliu2.
 
 ## 2026.3.8
 

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

@@ -23,6 +23,7 @@ const {
   resolveKimiBaseUrl,
   extractKimiCitations,
   resolveBraveMode,
+  mapBraveLlmContextResults,
 } = __testing;
 
 const kimiApiKeyEnv = ["KIMI_API", "KEY"].join("_");
@@ -393,3 +394,77 @@ describe("resolveBraveMode", () => {
     expect(resolveBraveMode({ mode: "invalid" })).toBe("web");
   });
 });
+
+describe("mapBraveLlmContextResults", () => {
+  it("maps plain string snippets correctly", () => {
+    const results = mapBraveLlmContextResults({
+      grounding: {
+        generic: [
+          {
+            url: "https://example.com/page",
+            title: "Example Page",
+            snippets: ["first snippet", "second snippet"],
+          },
+        ],
+      },
+    });
+    expect(results).toEqual([
+      {
+        url: "https://example.com/page",
+        title: "Example Page",
+        snippets: ["first snippet", "second snippet"],
+        siteName: "example.com",
+      },
+    ]);
+  });
+
+  it("filters out non-string and empty snippets", () => {
+    const results = mapBraveLlmContextResults({
+      grounding: {
+        generic: [
+          {
+            url: "https://example.com",
+            title: "Test",
+            snippets: ["valid", "", null, undefined, 42, { text: "object" }] as string[],
+          },
+        ],
+      },
+    });
+    expect(results[0].snippets).toEqual(["valid"]);
+  });
+
+  it("handles missing snippets array", () => {
+    const results = mapBraveLlmContextResults({
+      grounding: {
+        generic: [{ url: "https://example.com", title: "No Snippets" } as never],
+      },
+    });
+    expect(results[0].snippets).toEqual([]);
+  });
+
+  it("handles empty grounding.generic", () => {
+    expect(mapBraveLlmContextResults({ grounding: { generic: [] } })).toEqual([]);
+  });
+
+  it("handles missing grounding.generic", () => {
+    expect(mapBraveLlmContextResults({ grounding: {} } as never)).toEqual([]);
+  });
+
+  it("resolves siteName from URL hostname", () => {
+    const results = mapBraveLlmContextResults({
+      grounding: {
+        generic: [{ url: "https://docs.example.org/path", title: "Docs", snippets: ["text"] }],
+      },
+    });
+    expect(results[0].siteName).toBe("docs.example.org");
+  });
+
+  it("sets siteName to undefined for invalid URLs", () => {
+    const results = mapBraveLlmContextResults({
+      grounding: {
+        generic: [{ url: "not-a-url", title: "Bad URL", snippets: ["text"] }],
+      },
+    });
+    expect(results[0].siteName).toBeUndefined();
+  });
+});

src/agents/tools/web-search.ts

@@ -272,8 +272,7 @@ type BraveSearchResponse = {
   };
 };
 
-type BraveLlmContextSnippet = { text: string };
-type BraveLlmContextResult = { url: string; title: string; snippets: BraveLlmContextSnippet[] };
+type BraveLlmContextResult = { url: string; title: string; snippets: string[] };
 type BraveLlmContextResponse = {
   grounding: { generic?: BraveLlmContextResult[] };
   sources?: { url?: string; hostname?: string; date?: string }[];
@@ -1429,6 +1428,18 @@ async function runKimiSearch(params: {
   };
 }
 
+function mapBraveLlmContextResults(
+  data: BraveLlmContextResponse,
+): { url: string; title: string; snippets: string[]; siteName?: string }[] {
+  const genericResults = Array.isArray(data.grounding?.generic) ? data.grounding.generic : [];
+  return genericResults.map((entry) => ({
+    url: entry.url ?? "",
+    title: entry.title ?? "",
+    snippets: (entry.snippets ?? []).filter((s) => typeof s === "string" && s.length > 0),
+    siteName: resolveSiteName(entry.url) || undefined,
+  }));
+}
+
 async function runBraveLlmContextSearch(params: {
   query: string;
   apiKey: string;
@@ -1477,13 +1488,7 @@ async function runBraveLlmContextSearch(params: {
       }
 
       const data = (await res.json()) as BraveLlmContextResponse;
-      const genericResults = Array.isArray(data.grounding?.generic) ? data.grounding.generic : [];
-      const mapped = genericResults.map((entry) => ({
-        url: entry.url ?? "",
-        title: entry.title ?? "",
-        snippets: (entry.snippets ?? []).map((s) => s.text ?? "").filter(Boolean),
-        siteName: resolveSiteName(entry.url) || undefined,
-      }));
+      const mapped = mapBraveLlmContextResults(data);
 
       return { results: mapped, sources: data.sources };
     },
@@ -2122,4 +2127,5 @@ export const __testing = {
   extractKimiCitations,
   resolveRedirectUrl: resolveCitationRedirectUrl,
   resolveBraveMode,
+  mapBraveLlmContextResults,
 } as const;

src/agents/tools/web-tools.enabled-defaults.test.ts

@@ -694,7 +694,7 @@ describe("web_search external content wrapping", () => {
     const mockFetch = installBraveLlmContextFetch({
       title: "Context title",
       url: "https://example.com/ctx",
-      snippets: [{ text: "Context chunk one" }, { text: "Context chunk two" }],
+      snippets: ["Context chunk one", "Context chunk two"],
     });
 
     const tool = createWebSearchTool({