v0.0.3: add built-in web tools

Add no-key web_search and web_fetch tools.
Fetch pages with net/http and parse HTML content.
Document built-in web capabilities.

internal/tools/tools_test.go

@@ -84,6 +84,27 @@ func TestReadOnlyBuiltinsExposeOpenAICompatibleNamesAndAliases(t *testing.T) {
 	}
 }
 
+func TestRegistryCanExposeWebSearch(t *testing.T) {
+	registry := ReadOnlyBuiltins(t.TempDir())
+	registry.Register(NewBuiltinSearchTool(nil))
+	registry.Register(NewBuiltinFetchTool(nil))
+
+	var names []string
+	for _, def := range registry.Definitions() {
+		names = append(names, def.Function.Name)
+	}
+	for _, want := range []string{"web_search", "web_fetch"} {
+		if !slices.Contains(names, want) {
+			t.Fatalf("definitions missing %s: %#v", want, names)
+		}
+	}
+	for _, want := range []string{"web_search", "web_fetch"} {
+		if _, ok := registry.Get(want); !ok {
+			t.Fatalf("%s missing", want)
+		}
+	}
+}
+
 func TestBuiltinsExposeYoloTools(t *testing.T) {
 	registry := Builtins(t.TempDir())
 	for _, name := range []string{"file_write", "shell_run", "file.write", "shell.run"} {
@@ -108,3 +129,12 @@ func TestAgentInstructionsExplainCommandModes(t *testing.T) {
 		}
 	}
 }
+
+func TestAgentInstructionsExplainWebSearch(t *testing.T) {
+	withSearch := AgentInstructions("/tmp/project", false)
+	for _, want := range []string{"use web_search", "Use web_fetch", "latest information", "source URLs", "Available tools: file_list, file_read, file_search, web_search, web_fetch"} {
+		if !strings.Contains(withSearch, want) {
+			t.Fatalf("web search instructions missing %q:\n%s", want, withSearch)
+		}
+	}
+}