feat(tools): add GLM Search (智谱) web search provider (#1057)

* feat(config): add GLMSearchConfig for GLM Search provider

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* test(tools): add failing tests for GLM Search provider

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat(tools): add GLMSearchProvider for web search

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat(agent): wire GLM Search config into web search tool registration

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

pkg/agent/loop.go

@@ -118,6 +118,11 @@ func registerSharedTools(
 			PerplexityAPIKey:     cfg.Tools.Web.Perplexity.APIKey,
 			PerplexityMaxResults: cfg.Tools.Web.Perplexity.MaxResults,
 			PerplexityEnabled:    cfg.Tools.Web.Perplexity.Enabled,
+			GLMSearchAPIKey:      cfg.Tools.Web.GLMSearch.APIKey,
+			GLMSearchBaseURL:     cfg.Tools.Web.GLMSearch.BaseURL,
+			GLMSearchEngine:      cfg.Tools.Web.GLMSearch.SearchEngine,
+			GLMSearchMaxResults:  cfg.Tools.Web.GLMSearch.MaxResults,
+			GLMSearchEnabled:     cfg.Tools.Web.GLMSearch.Enabled,
 			Proxy:                cfg.Tools.Web.Proxy,
 		})
 		if err != nil {

pkg/config/config.go

@@ -547,11 +547,22 @@ type PerplexityConfig struct {
 	MaxResults int    `json:"max_results" env:"PICOCLAW_TOOLS_WEB_PERPLEXITY_MAX_RESULTS"`
 }
 
+type GLMSearchConfig struct {
+	Enabled bool   `json:"enabled"  env:"PICOCLAW_TOOLS_WEB_GLM_ENABLED"`
+	APIKey  string `json:"api_key"  env:"PICOCLAW_TOOLS_WEB_GLM_API_KEY"`
+	BaseURL string `json:"base_url" env:"PICOCLAW_TOOLS_WEB_GLM_BASE_URL"`
+	// SearchEngine specifies the search backend: "search_std" (default),
+	// "search_pro", "search_pro_sogou", or "search_pro_quark".
+	SearchEngine string `json:"search_engine" env:"PICOCLAW_TOOLS_WEB_GLM_SEARCH_ENGINE"`
+	MaxResults   int    `json:"max_results"   env:"PICOCLAW_TOOLS_WEB_GLM_MAX_RESULTS"`
+}
+
 type WebToolsConfig struct {
 	Brave      BraveConfig      `json:"brave"`
 	Tavily     TavilyConfig     `json:"tavily"`
 	DuckDuckGo DuckDuckGoConfig `json:"duckduckgo"`
 	Perplexity PerplexityConfig `json:"perplexity"`
+	GLMSearch  GLMSearchConfig  `json:"glm_search"`
 	// Proxy is an optional proxy URL for web tools (http/https/socks5/socks5h).
 	// For authenticated proxies, prefer HTTP_PROXY/HTTPS_PROXY env vars instead of embedding credentials in config.
 	Proxy           string `json:"proxy,omitempty"             env:"PICOCLAW_TOOLS_WEB_PROXY"`

pkg/config/defaults.go

@@ -343,6 +343,13 @@ func DefaultConfig() *Config {
 					APIKey:     "",
 					MaxResults: 5,
 				},
+				GLMSearch: GLMSearchConfig{
+					Enabled:      false,
+					APIKey:       "",
+					BaseURL:      "https://open.bigmodel.cn/api/paas/v4/web_search",
+					SearchEngine: "search_std",
+					MaxResults:   5,
+				},
 			},
 			Cron: CronToolsConfig{
 				ExecTimeoutMinutes: 5,

pkg/tools/web.go

@@ -395,6 +395,88 @@ func (p *PerplexitySearchProvider) Search(ctx context.Context, query string, cou
 	return fmt.Sprintf("Results for: %s (via Perplexity)\n%s", query, searchResp.Choices[0].Message.Content), nil
 }
 
+type GLMSearchProvider struct {
+	apiKey       string
+	baseURL      string
+	searchEngine string
+	proxy        string
+	client       *http.Client
+}
+
+func (p *GLMSearchProvider) Search(ctx context.Context, query string, count int) (string, error) {
+	searchURL := p.baseURL
+	if searchURL == "" {
+		searchURL = "https://open.bigmodel.cn/api/paas/v4/web_search"
+	}
+
+	payload := map[string]any{
+		"search_query":  query,
+		"search_engine": p.searchEngine,
+		"search_intent": false,
+		"count":         count,
+		"content_size":  "medium",
+	}
+
+	bodyBytes, err := json.Marshal(payload)
+	if err != nil {
+		return "", fmt.Errorf("failed to marshal payload: %w", err)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, "POST", searchURL, bytes.NewReader(bodyBytes))
+	if err != nil {
+		return "", fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Authorization", "Bearer "+p.apiKey)
+
+	resp, err := p.client.Do(req)
+	if err != nil {
+		return "", fmt.Errorf("request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(io.LimitReader(resp.Body, 1<<20))
+	if err != nil {
+		return "", fmt.Errorf("failed to read response: %w", err)
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("GLM Search API error (status %d): %s", resp.StatusCode, string(body))
+	}
+
+	var searchResp struct {
+		SearchResult []struct {
+			Title   string `json:"title"`
+			Content string `json:"content"`
+			Link    string `json:"link"`
+		} `json:"search_result"`
+	}
+
+	if err := json.Unmarshal(body, &searchResp); err != nil {
+		return "", fmt.Errorf("failed to parse response: %w", err)
+	}
+
+	results := searchResp.SearchResult
+	if len(results) == 0 {
+		return fmt.Sprintf("No results for: %s", query), nil
+	}
+
+	var lines []string
+	lines = append(lines, fmt.Sprintf("Results for: %s (via GLM Search)", query))
+	for i, item := range results {
+		if i >= count {
+			break
+		}
+		lines = append(lines, fmt.Sprintf("%d. %s\n   %s", i+1, item.Title, item.Link))
+		if item.Content != "" {
+			lines = append(lines, fmt.Sprintf("   %s", item.Content))
+		}
+	}
+
+	return strings.Join(lines, "\n"), nil
+}
+
 type WebSearchTool struct {
 	provider   SearchProvider
 	maxResults int
@@ -413,6 +495,11 @@ type WebSearchToolOptions struct {
 	PerplexityAPIKey     string
 	PerplexityMaxResults int
 	PerplexityEnabled    bool
+	GLMSearchAPIKey      string
+	GLMSearchBaseURL     string
+	GLMSearchEngine      string
+	GLMSearchMaxResults  int
+	GLMSearchEnabled     bool
 	Proxy                string
 }
 
@@ -420,7 +507,7 @@ func NewWebSearchTool(opts WebSearchToolOptions) (*WebSearchTool, error) {
 	var provider SearchProvider
 	maxResults := 5
 
-	// Priority: Perplexity > Brave > Tavily > DuckDuckGo
+	// Priority: Perplexity > Brave > Tavily > DuckDuckGo > GLM Search
 	if opts.PerplexityEnabled && opts.PerplexityAPIKey != "" {
 		client, err := createHTTPClient(opts.Proxy, perplexityTimeout)
 		if err != nil {
@@ -462,6 +549,25 @@ func NewWebSearchTool(opts WebSearchToolOptions) (*WebSearchTool, error) {
 		if opts.DuckDuckGoMaxResults > 0 {
 			maxResults = opts.DuckDuckGoMaxResults
 		}
+	} else if opts.GLMSearchEnabled && opts.GLMSearchAPIKey != "" {
+		client, err := createHTTPClient(opts.Proxy, searchTimeout)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create HTTP client for GLM Search: %w", err)
+		}
+		searchEngine := opts.GLMSearchEngine
+		if searchEngine == "" {
+			searchEngine = "search_std"
+		}
+		provider = &GLMSearchProvider{
+			apiKey:       opts.GLMSearchAPIKey,
+			baseURL:      opts.GLMSearchBaseURL,
+			searchEngine: searchEngine,
+			proxy:        opts.Proxy,
+			client:       client,
+		}
+		if opts.GLMSearchMaxResults > 0 {
+			maxResults = opts.GLMSearchMaxResults
+		}
 	} else {
 		return nil, nil
 	}

pkg/tools/web_test.go

@@ -681,3 +681,135 @@ func TestWebTool_TavilySearch_Success(t *testing.T) {
 		t.Errorf("Expected 'via Tavily' in output, got: %s", result.ForUser)
 	}
 }
+
+func TestWebTool_GLMSearch_Success(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != "POST" {
+			t.Errorf("Expected POST request, got %s", r.Method)
+		}
+		if r.Header.Get("Content-Type") != "application/json" {
+			t.Errorf("Expected Content-Type application/json, got %s", r.Header.Get("Content-Type"))
+		}
+		if r.Header.Get("Authorization") != "Bearer test-glm-key" {
+			t.Errorf("Expected Authorization Bearer test-glm-key, got %s", r.Header.Get("Authorization"))
+		}
+
+		var payload map[string]any
+		json.NewDecoder(r.Body).Decode(&payload)
+		if payload["search_query"] != "test query" {
+			t.Errorf("Expected search_query 'test query', got %v", payload["search_query"])
+		}
+		if payload["search_engine"] != "search_std" {
+			t.Errorf("Expected search_engine 'search_std', got %v", payload["search_engine"])
+		}
+
+		response := map[string]any{
+			"id":      "web-search-test",
+			"created": 1709568000,
+			"search_result": []map[string]any{
+				{
+					"title":        "Test GLM Result",
+					"content":      "GLM search snippet",
+					"link":         "https://example.com/glm",
+					"media":        "Example",
+					"publish_date": "2026-03-04",
+				},
+			},
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		json.NewEncoder(w).Encode(response)
+	}))
+	defer server.Close()
+
+	tool, err := NewWebSearchTool(WebSearchToolOptions{
+		GLMSearchEnabled: true,
+		GLMSearchAPIKey:  "test-glm-key",
+		GLMSearchBaseURL: server.URL,
+		GLMSearchEngine:  "search_std",
+	})
+	if err != nil {
+		t.Fatalf("NewWebSearchTool() error: %v", err)
+	}
+
+	result := tool.Execute(context.Background(), map[string]any{
+		"query": "test query",
+	})
+
+	if result.IsError {
+		t.Errorf("Expected success, got IsError=true: %s", result.ForLLM)
+	}
+	if !strings.Contains(result.ForUser, "Test GLM Result") {
+		t.Errorf("Expected 'Test GLM Result' in output, got: %s", result.ForUser)
+	}
+	if !strings.Contains(result.ForUser, "https://example.com/glm") {
+		t.Errorf("Expected URL in output, got: %s", result.ForUser)
+	}
+	if !strings.Contains(result.ForUser, "via GLM Search") {
+		t.Errorf("Expected 'via GLM Search' in output, got: %s", result.ForUser)
+	}
+}
+
+func TestWebTool_GLMSearch_APIError(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		w.WriteHeader(http.StatusUnauthorized)
+		w.Write([]byte(`{"error":"invalid api key"}`))
+	}))
+	defer server.Close()
+
+	tool, err := NewWebSearchTool(WebSearchToolOptions{
+		GLMSearchEnabled: true,
+		GLMSearchAPIKey:  "bad-key",
+		GLMSearchBaseURL: server.URL,
+		GLMSearchEngine:  "search_std",
+	})
+	if err != nil {
+		t.Fatalf("NewWebSearchTool() error: %v", err)
+	}
+
+	result := tool.Execute(context.Background(), map[string]any{
+		"query": "test query",
+	})
+
+	if !result.IsError {
+		t.Errorf("Expected IsError=true for 401 response")
+	}
+	if !strings.Contains(result.ForLLM, "status 401") {
+		t.Errorf("Expected status 401 in error, got: %s", result.ForLLM)
+	}
+}
+
+func TestWebTool_GLMSearch_Priority(t *testing.T) {
+	// GLM Search should only be selected when all other providers are disabled
+	tool, err := NewWebSearchTool(WebSearchToolOptions{
+		DuckDuckGoEnabled:    true,
+		DuckDuckGoMaxResults: 5,
+		GLMSearchEnabled:     true,
+		GLMSearchAPIKey:      "test-key",
+		GLMSearchBaseURL:     "https://example.com",
+		GLMSearchEngine:      "search_std",
+	})
+	if err != nil {
+		t.Fatalf("NewWebSearchTool() error: %v", err)
+	}
+
+	// DuckDuckGo should win over GLM Search
+	if _, ok := tool.provider.(*DuckDuckGoSearchProvider); !ok {
+		t.Errorf("Expected DuckDuckGoSearchProvider when both enabled, got %T", tool.provider)
+	}
+
+	// With DuckDuckGo disabled, GLM Search should be selected
+	tool2, err := NewWebSearchTool(WebSearchToolOptions{
+		DuckDuckGoEnabled: false,
+		GLMSearchEnabled:  true,
+		GLMSearchAPIKey:   "test-key",
+		GLMSearchBaseURL:  "https://example.com",
+		GLMSearchEngine:   "search_std",
+	})
+	if err != nil {
+		t.Fatalf("NewWebSearchTool() error: %v", err)
+	}
+	if _, ok := tool2.provider.(*GLMSearchProvider); !ok {
+		t.Errorf("Expected GLMSearchProvider when only GLM enabled, got %T", tool2.provider)
+	}
+}