chore: auto-commit (4 archivos)

- integration_test.go
- main.go
- tool_search.go
- tool_proposal.go

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

integration_test.go

@@ -199,3 +199,68 @@ func min(a, b int) int {
 	}
 	return b
 }
+
+func TestIntegration_SearchByTag(t *testing.T) {
+	root := findRegistryRoot(t)
+	p := newPipePair()
+	stop := startServer(t, root, p)
+	defer stop()
+
+	br := bufio.NewReader(p.clientFromServer)
+
+	sendJSON(t, p.clientToServer, map[string]any{
+		"jsonrpc": "2.0", "id": 1, "method": "initialize",
+		"params": map[string]any{
+			"protocolVersion": "2025-06-18",
+			"capabilities":    map[string]any{},
+			"clientInfo":      map[string]any{"name": "test", "version": "0"},
+		},
+	})
+	_ = recvJSONUntilID(t, br, 1)
+
+	sendJSON(t, p.clientToServer, map[string]any{
+		"jsonrpc": "2.0", "method": "notifications/initialized",
+	})
+
+	// Single tag filter: 'notebook' must include the jupyter_* family.
+	sendJSON(t, p.clientToServer, map[string]any{
+		"jsonrpc": "2.0", "id": 2, "method": "tools/call",
+		"params": map[string]any{
+			"name":      "fn_search",
+			"arguments": map[string]any{"query": "", "tag": "notebook", "limit": 20},
+		},
+	})
+	msg := recvJSONUntilID(t, br, 2)
+	text := msg["result"].(map[string]any)["content"].([]any)[0].(map[string]any)["text"].(string)
+	if !strings.Contains(text, "jupyter_discover_py_notebook") {
+		t.Errorf("tag=notebook should return jupyter_discover_py_notebook:\n%s", text[:min(800, len(text))])
+	}
+
+	// CSV tags: AND across — narrower result.
+	sendJSON(t, p.clientToServer, map[string]any{
+		"jsonrpc": "2.0", "id": 3, "method": "tools/call",
+		"params": map[string]any{
+			"name":      "fn_search",
+			"arguments": map[string]any{"query": "", "tags": "notebook,jupyter", "limit": 20},
+		},
+	})
+	msg = recvJSONUntilID(t, br, 3)
+	text = msg["result"].(map[string]any)["content"].([]any)[0].(map[string]any)["text"].(string)
+	// Should still match jupyter_* since they have both tags (if tagged).
+	// If 'jupyter' tag does not exist this just returns 0 — accept either as valid.
+	_ = text
+
+	// Bogus tag: must return 0.
+	sendJSON(t, p.clientToServer, map[string]any{
+		"jsonrpc": "2.0", "id": 4, "method": "tools/call",
+		"params": map[string]any{
+			"name":      "fn_search",
+			"arguments": map[string]any{"query": "", "tag": "this-tag-does-not-exist-xyz", "limit": 5},
+		},
+	})
+	msg = recvJSONUntilID(t, br, 4)
+	text = msg["result"].(map[string]any)["content"].([]any)[0].(map[string]any)["text"].(string)
+	if !strings.Contains(text, "\"count\": 0") {
+		t.Errorf("bogus tag should return count=0:\n%s", text[:min(400, len(text))])
+	}
+}