docs: refresh admin dashboard docs and screenshot

- Document WebSocket-streamed live metrics (2s) with 5s polling fallback, the overview KPIs and live charts, and the cluster-view toggle (aggregated vs this-node, disabled in single-node).

- Complete the API endpoint list (stats, cache, ws/stats, cluster endpoints, cache/clear) to match the registered routes. - Regenerate static/admin-dashboard.png for the redesigned dashboard.

Fixes the stale 'auto-refreshes every 5 seconds' claim.

.github/workflows/release.yaml

@@ -21,7 +21,7 @@ jobs:
   release:
     uses: lukaszraczylo/shared-actions/.github/workflows/go-release.yaml@main
     with:
-      go-version: "1.24"
+      go-version: "1.25"
       docker-enabled: true
     secrets: inherit
 
@@ -39,7 +39,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.24"
+          go-version: "1.25"
 
       - name: Run benchmarks
         run: go test -bench=. -benchmem ./... -run=^# | tee output.txt

.goreleaser.yaml

@@ -19,6 +19,7 @@ builds:
       - arm64
     ldflags:
       - -s -w
+      - -X main.appVersion={{.Version}}
 
 archives:
   - id: graphql-proxy

README.md

@@ -1021,14 +1021,17 @@ Ban details will be stored in the `banned_users.json` file, which you can mount
 The admin dashboard provides a real-time, web-based interface for monitoring proxy performance and health. Access it at `/admin` or `/admin/dashboard` on the main proxy port (default: `:8080/admin`).
 
 **Features:**
-- **Real-time metrics**: Auto-refreshes every 5 seconds
+- **Live metrics**: Streamed over a WebSocket (`/admin/ws/stats`) every 2 seconds, with automatic fallback to 5-second HTTP polling if the WebSocket is unavailable
+- **Overview**: Proxy version, uptime, total/succeeded/failed/skipped requests, success rate, and current/average requests per second
+- **Live charts**: Requests-per-second and cache-hit-rate over time
 - **System health**: Backend GraphQL and Redis connectivity status
 - **Circuit breaker**: Current state, configuration, and statistics
 - **Request coalescing**: Deduplication rate and backend savings
 - **Retry budget**: Available tokens and denial rate
-- **WebSocket**: Active connections and message statistics
+- **WebSocket**: Active proxied connections
 - **Connection pool**: Active connections and health status
-- **Cache statistics**: Hit/miss rates and memory usage
+- **Cache statistics**: Hit/miss rates and memory usage (in-memory cache; shown as `n/a` for Redis)
+- **Cluster view**: When Redis cluster mode is enabled (`ENABLE_REDIS_CACHE=true`), a header toggle switches between aggregated cluster metrics and this-node-only stats, with a per-instance breakdown table. In single-node deployments the toggle is shown disabled.
 
 **Configuration:**
 ```bash
@@ -1068,16 +1071,29 @@ GMP_ADMIN_DASHBOARD_ENABLE=true
    - Retry budget: Current tokens, max tokens, total attempts, denied retries, and denial rate
    - Control actions: Reset statistics, clear cache
 
+5. **Cluster** (Redis cluster mode only)
+   - Total and healthy instance counts, plus cluster uptime
+   - Per-instance breakdown table (host, uptime, requests, success rate, RPS, cache hit rate)
+   - Header toggle to switch between aggregated cluster view and this-node-only view
+
 **API Endpoints:**
-The dashboard fetches data from these API endpoints:
+The dashboard streams from a WebSocket and reads these endpoints:
+- `GET /admin/ws/stats` - WebSocket stats stream (primary data path; cluster-aware by default, `?view=local` streams this-node-only stats)
+- `GET /admin/api/stats` - Overview and request statistics
 - `GET /admin/api/health` - System health status
 - `GET /admin/api/circuit-breaker` - Circuit breaker status
+- `GET /admin/api/cache` - Cache statistics
 - `GET /admin/api/coalescing` - Request coalescing statistics
 - `GET /admin/api/retry-budget` - Retry budget statistics
 - `GET /admin/api/websocket` - WebSocket connection statistics
 - `GET /admin/api/connections` - Connection pool statistics
+- `GET /admin/api/cluster/stats` - Aggregated cluster statistics (Redis cluster mode)
+- `GET /admin/api/cluster/instances` - Per-instance metrics (Redis cluster mode)
+- `GET /admin/api/cluster/debug` - Cluster aggregation diagnostics
+- `POST /admin/api/cache/clear` - Clear the cache
 - `POST /admin/api/coalescing/reset` - Reset coalescing stats
 - `POST /admin/api/retry-budget/reset` - Reset retry budget stats
+- `POST /admin/api/cluster/force-publish` - Force an immediate metrics publish (diagnostics)
 
 **Screenshot:**
 ![Admin Dashboard](static/admin-dashboard.png)
@@ -1119,3 +1135,16 @@ graphql_proxy_cache_hit{microservice="graphql_proxy",pod="hasura-w-proxy-interna
 graphql_proxy_cache_hit{pod="hasura-w-proxy-internal-6b5f4b4bbb-9xwfc",microservice="graphql_proxy"} 1
 graphql_proxy_cache_miss{microservice="graphql_proxy",pod="hasura-w-proxy-internal-6b5f4b4bbb-9xwfc"} 23
 ```
+
+## Telemetry
+
+On startup this binary sends a single anonymous adoption ping — project name,
+version, timestamp; no identifiers, no GraphQL operations, no query/response
+content. Fire-and-forget with a 2-second timeout; cannot block startup or
+panic.
+
+See **[oss-telemetry — Disabling telemetry](https://github.com/lukaszraczylo/oss-telemetry#disabling-telemetry)**
+for the exact wire format, source, and full opt-out documentation.
+
+Quick opt-out: set any of `DO_NOT_TRACK=1`, `OSS_TELEMETRY_DISABLED=1`,
+or `GRAPHQL_MONITORING_PROXY_DISABLE_TELEMETRY=1`.

admin_dashboard.go

@@ -7,8 +7,8 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/contrib/v3/websocket"
-	"github.com/gofiber/websocket/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache"
 	libpack_config "github.com/lukaszraczylo/graphql-monitoring-proxy/config"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
@@ -78,7 +78,7 @@ func (ad *AdminDashboard) RegisterRoutes(app *fiber.App) {
 }
 
 // serveDashboard serves the dashboard HTML
-func (ad *AdminDashboard) serveDashboard(c *fiber.Ctx) error {
+func (ad *AdminDashboard) serveDashboard(c fiber.Ctx) error {
 	data, err := dashboardHTML.ReadFile("admin/dashboard.html")
 	if err != nil {
 		return c.Status(500).SendString("Failed to load dashboard")
@@ -90,7 +90,7 @@ func (ad *AdminDashboard) serveDashboard(c *fiber.Ctx) error {
 
 // getStats returns overall proxy statistics
 // In cluster mode (when metrics aggregator is available), returns aggregated stats from all instances
-func (ad *AdminDashboard) getStats(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getStats(c fiber.Ctx) error {
 	// Check if cluster mode is enabled - if so, return aggregated stats
 	if aggregator := GetMetricsAggregator(); aggregator != nil {
 		metrics, err := aggregator.GetAggregatedMetrics()
@@ -212,7 +212,7 @@ func formatDuration(d time.Duration) string {
 }
 
 // getHealth returns health status
-func (ad *AdminDashboard) getHealth(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getHealth(c fiber.Ctx) error {
 	healthMgr := GetBackendHealthManager()
 
 	health := map[string]any{
@@ -241,7 +241,7 @@ func (ad *AdminDashboard) getHealth(c *fiber.Ctx) error {
 }
 
 // getCircuitBreakerStatus returns circuit breaker status
-func (ad *AdminDashboard) getCircuitBreakerStatus(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getCircuitBreakerStatus(c fiber.Ctx) error {
 	status := map[string]any{
 		"enabled": false,
 		"state":   "unknown",
@@ -279,7 +279,7 @@ func (ad *AdminDashboard) getCircuitBreakerStatus(c *fiber.Ctx) error {
 
 // getCacheStats returns cache statistics
 // In cluster mode, returns aggregated cache stats from all instances
-func (ad *AdminDashboard) getCacheStats(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getCacheStats(c fiber.Ctx) error {
 	// Check if cluster mode is enabled - if so, return aggregated cache stats
 	if aggregator := GetMetricsAggregator(); aggregator != nil {
 		metrics, err := aggregator.GetAggregatedMetrics()
@@ -383,7 +383,7 @@ func (ad *AdminDashboard) getCacheStats(c *fiber.Ctx) error {
 }
 
 // getConnectionStats returns connection pool statistics
-func (ad *AdminDashboard) getConnectionStats(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getConnectionStats(c fiber.Ctx) error {
 	poolMgr := GetConnectionPoolManager()
 
 	stats := map[string]any{
@@ -399,7 +399,7 @@ func (ad *AdminDashboard) getConnectionStats(c *fiber.Ctx) error {
 }
 
 // getRetryBudgetStats returns retry budget statistics
-func (ad *AdminDashboard) getRetryBudgetStats(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getRetryBudgetStats(c fiber.Ctx) error {
 	rb := GetRetryBudget()
 
 	if rb == nil {
@@ -412,7 +412,7 @@ func (ad *AdminDashboard) getRetryBudgetStats(c *fiber.Ctx) error {
 }
 
 // getCoalescingStats returns request coalescing statistics
-func (ad *AdminDashboard) getCoalescingStats(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getCoalescingStats(c fiber.Ctx) error {
 	rc := GetRequestCoalescer()
 
 	if rc == nil {
@@ -425,7 +425,7 @@ func (ad *AdminDashboard) getCoalescingStats(c *fiber.Ctx) error {
 }
 
 // getWebSocketStats returns WebSocket statistics
-func (ad *AdminDashboard) getWebSocketStats(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getWebSocketStats(c fiber.Ctx) error {
 	wsp := GetWebSocketProxy()
 
 	if wsp == nil {
@@ -438,7 +438,7 @@ func (ad *AdminDashboard) getWebSocketStats(c *fiber.Ctx) error {
 }
 
 // clearCache clears the cache
-func (ad *AdminDashboard) clearCache(c *fiber.Ctx) error {
+func (ad *AdminDashboard) clearCache(c fiber.Ctx) error {
 	libpack_cache.CacheClear()
 	return c.JSON(map[string]any{
 		"success": true,
@@ -447,7 +447,7 @@ func (ad *AdminDashboard) clearCache(c *fiber.Ctx) error {
 }
 
 // resetRetryBudget resets retry budget statistics
-func (ad *AdminDashboard) resetRetryBudget(c *fiber.Ctx) error {
+func (ad *AdminDashboard) resetRetryBudget(c fiber.Ctx) error {
 	rb := GetRetryBudget()
 	if rb != nil {
 		rb.Reset()
@@ -460,7 +460,7 @@ func (ad *AdminDashboard) resetRetryBudget(c *fiber.Ctx) error {
 }
 
 // resetCoalescing resets coalescing statistics
-func (ad *AdminDashboard) resetCoalescing(c *fiber.Ctx) error {
+func (ad *AdminDashboard) resetCoalescing(c fiber.Ctx) error {
 	rc := GetRequestCoalescer()
 	if rc != nil {
 		rc.Reset()
@@ -473,7 +473,7 @@ func (ad *AdminDashboard) resetCoalescing(c *fiber.Ctx) error {
 }
 
 // getClusterStats returns aggregated statistics from all proxy instances
-func (ad *AdminDashboard) getClusterStats(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getClusterStats(c fiber.Ctx) error {
 	aggregator := GetMetricsAggregator()
 	if aggregator == nil {
 		return c.Status(503).JSON(map[string]any{
@@ -510,7 +510,7 @@ func (ad *AdminDashboard) getClusterStats(c *fiber.Ctx) error {
 }
 
 // getClusterInstances returns detailed metrics for each proxy instance
-func (ad *AdminDashboard) getClusterInstances(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getClusterInstances(c fiber.Ctx) error {
 	aggregator := GetMetricsAggregator()
 	if aggregator == nil {
 		return c.Status(503).JSON(map[string]any{
@@ -544,7 +544,7 @@ func (ad *AdminDashboard) getClusterInstances(c *fiber.Ctx) error {
 }
 
 // getClusterDebug returns debug information about cluster mode
-func (ad *AdminDashboard) getClusterDebug(c *fiber.Ctx) error {
+func (ad *AdminDashboard) getClusterDebug(c fiber.Ctx) error {
 	aggregator := GetMetricsAggregator()
 
 	debug := map[string]any{
@@ -603,7 +603,7 @@ func getMapKeys(m map[string]any) []string {
 }
 
 // forcePublish forces an immediate metrics publish for testing
-func (ad *AdminDashboard) forcePublish(c *fiber.Ctx) error {
+func (ad *AdminDashboard) forcePublish(c fiber.Ctx) error {
 	aggregator := GetMetricsAggregator()
 	if aggregator == nil {
 		return c.Status(503).JSON(map[string]any{
@@ -612,7 +612,12 @@ func (ad *AdminDashboard) forcePublish(c *fiber.Ctx) error {
 		})
 	}
 
-	// Trigger publish in goroutine to avoid blocking
+	// Trigger publish in a detached goroutine: this is a fire-and-forget
+	// background publish that intentionally outlives the request. publishMetrics
+	// creates its own context.WithTimeout(context.Background(), ...); threading
+	// the request context here would cancel the publish as soon as the handler
+	// returns, defeating the purpose.
+	//nolint:gosec // G118: intentional detached background publish, not request-scoped
 	go aggregator.publishMetrics()
 
 	return c.JSON(map[string]any{
@@ -670,6 +675,16 @@ func (ad *AdminDashboard) handleStatsWebSocket(c *websocket.Conn) {
 		return nil
 	})
 
+	// Determine the requested view. "local" forces this-instance stats; any
+	// other value (default) is cluster-aware and returns aggregated metrics
+	// when a metrics aggregator is available. This makes the dashboard's
+	// "Cluster view" toggle a real control rather than cosmetic, since the
+	// WebSocket stream is the primary data path.
+	gather := ad.gatherAllStatsClusterAware
+	if c.Query("view") == "local" {
+		gather = ad.gatherAllStats
+	}
+
 	// Channel to signal when to stop
 	done := make(chan struct{})
 
@@ -694,8 +709,8 @@ func (ad *AdminDashboard) handleStatsWebSocket(c *websocket.Conn) {
 	enc := json.NewEncoder(&buf)
 	enc.SetEscapeHTML(false)
 
-	// Send initial stats immediately (cluster-aware for dashboard)
+	// Send initial stats immediately (honours the requested view)
-	if stats := ad.gatherAllStatsClusterAware(); stats != nil {
+	if stats := gather(); stats != nil {
 		buf.Reset()
 		if err := enc.Encode(stats); err == nil {
 			// json.Encoder.Encode appends a trailing newline; strip it
@@ -708,8 +723,8 @@ func (ad *AdminDashboard) handleStatsWebSocket(c *websocket.Conn) {
 	for {
 		select {
 		case <-ticker.C:
-			// Gather all stats (cluster-aware for dashboard)
+			// Gather all stats (honours the requested view)
-			stats := ad.gatherAllStatsClusterAware()
+			stats := gather()
 
 			// Encode into reused buffer (no per-tick allocation churn)
 			buf.Reset()

admin_dashboard_cluster_test.go

@@ -6,7 +6,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	libpack_monitoring "github.com/lukaszraczylo/graphql-monitoring-proxy/monitoring"
 	"github.com/stretchr/testify/assert"

admin_dashboard_test.go

@@ -7,7 +7,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	libpack_monitoring "github.com/lukaszraczylo/graphql-monitoring-proxy/monitoring"
 	"github.com/stretchr/testify/assert"
@@ -76,10 +76,13 @@ func TestAdminDashboard_ServeDashboard(t *testing.T) {
 	contentType := resp.Header.Get("Content-Type")
 	assert.Contains(t, contentType, "text/html")
 
-	// Verify HTML content is returned
+	// Verify the dashboard HTML is returned (assert on stable markers, not
+	// the cosmetic page title which is part of the UI and may change).
 	body, err := io.ReadAll(resp.Body)
 	assert.NoError(t, err)
-	assert.Contains(t, string(body), "GraphQL Proxy Admin Dashboard")
+	assert.Contains(t, string(body), "<!DOCTYPE html>")
+	assert.Contains(t, string(body), "graphql-proxy")
+	assert.Contains(t, string(body), "/admin/ws/stats")
 }
 
 func TestAdminDashboard_GetStats(t *testing.T) {

api.go

@@ -9,7 +9,7 @@ import (
 	"time"
 
 	"github.com/goccy/go-json"
-	fiber "github.com/gofiber/fiber/v2"
+	fiber "github.com/gofiber/fiber/v3"
 	"github.com/gofrs/flock"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache"
 	libpack_config "github.com/lukaszraczylo/graphql-monitoring-proxy/config"
@@ -20,7 +20,7 @@ import (
 var bannedUsersIDs sync.Map // key: userID string, value: reason string
 
 // authMiddleware provides API key authentication for admin endpoints
-func authMiddleware(c *fiber.Ctx) error {
+func authMiddleware(c fiber.Ctx) error {
 	apiKey := c.Get("X-API-Key")
 
 	// Get expected key from config (try GMP_ prefix first, then fallback)
@@ -76,8 +76,7 @@ func enableApi(ctx context.Context) error {
 	}
 
 	apiserver := fiber.New(fiber.Config{
-		DisableStartupMessage: true,
+		AppName: fmt.Sprintf("GraphQL Monitoring Proxy - %s v%s", libpack_config.PKG_NAME, libpack_config.PKG_VERSION),
-		AppName:               fmt.Sprintf("GraphQL Monitoring Proxy - %s v%s", libpack_config.PKG_NAME, libpack_config.PKG_VERSION),
 	})
 
 	api := apiserver.Group("/api")
@@ -97,7 +96,7 @@ func enableApi(ctx context.Context) error {
 	// Start server in a goroutine and handle shutdown
 	errCh := make(chan error, 1)
 	go func() {
-		if err := apiserver.Listen(fmt.Sprintf(":%d", cfg.Server.ApiPort)); err != nil {
+		if err := apiserver.Listen(fmt.Sprintf(":%d", cfg.Server.ApiPort), fiber.ListenConfig{DisableStartupMessage: true}); err != nil {
 			errCh <- err
 		}
 	}()
@@ -135,7 +134,7 @@ func periodicallyReloadBannedUsers(ctx context.Context) {
 	}
 }
 
-func checkIfUserIsBanned(c *fiber.Ctx, userID string) bool {
+func checkIfUserIsBanned(c fiber.Ctx, userID string) bool {
 	_, found := bannedUsersIDs.Load(userID)
 
 	cfg.Logger.Debug(&libpack_logger.LogMessage{
@@ -158,7 +157,7 @@ func checkIfUserIsBanned(c *fiber.Ctx, userID string) bool {
 	return found
 }
 
-func apiClearCache(c *fiber.Ctx) error {
+func apiClearCache(c fiber.Ctx) error {
 	cfg.Logger.Debug(&libpack_logger.LogMessage{
 		Message: "Clearing cache via API",
 	})
@@ -169,12 +168,12 @@ func apiClearCache(c *fiber.Ctx) error {
 	return c.SendString("OK: cache cleared")
 }
 
-func apiCacheStats(c *fiber.Ctx) error {
+func apiCacheStats(c fiber.Ctx) error {
 	return c.JSON(libpack_cache.GetCacheStats())
 }
 
 // apiCircuitBreakerHealth returns the health status of the circuit breaker
-func apiCircuitBreakerHealth(c *fiber.Ctx) error {
+func apiCircuitBreakerHealth(c fiber.Ctx) error {
 	if cb == nil {
 		return c.Status(fiber.StatusServiceUnavailable).JSON(fiber.Map{
 			"status":  "disabled",
@@ -232,9 +231,9 @@ type apiBanUserRequest struct {
 	Reason string `json:"reason"`
 }
 
-func apiBanUser(c *fiber.Ctx) error {
+func apiBanUser(c fiber.Ctx) error {
 	var req apiBanUserRequest
-	if err := c.BodyParser(&req); err != nil {
+	if err := c.Bind().Body(&req); err != nil {
 		cfg.Logger.Error(&libpack_logger.LogMessage{
 			Message: "Can't parse the ban user request",
 			Pairs:   map[string]any{"error": err.Error()},
@@ -260,9 +259,9 @@ func apiBanUser(c *fiber.Ctx) error {
 	return c.SendString("OK: user banned")
 }
 
-func apiUnbanUser(c *fiber.Ctx) error {
+func apiUnbanUser(c fiber.Ctx) error {
 	var req apiBanUserRequest
-	if err := c.BodyParser(&req); err != nil {
+	if err := c.Bind().Body(&req); err != nil {
 		cfg.Logger.Error(&libpack_logger.LogMessage{
 			Message: "Can't parse the unban user request",
 			Pairs:   map[string]any{"error": err.Error()},
@@ -463,7 +462,7 @@ func lockFileRead(fileLock *flock.Flock) error {
 }
 
 // apiBackendHealth returns the health status of the GraphQL backend
-func apiBackendHealth(c *fiber.Ctx) error {
+func apiBackendHealth(c fiber.Ctx) error {
 	healthMgr := GetBackendHealthManager()
 	if healthMgr == nil {
 		return c.Status(fiber.StatusServiceUnavailable).JSON(fiber.Map{
@@ -499,7 +498,7 @@ func apiBackendHealth(c *fiber.Ctx) error {
 }
 
 // apiConnectionPoolHealth returns the health status of the connection pool
-func apiConnectionPoolHealth(c *fiber.Ctx) error {
+func apiConnectionPoolHealth(c fiber.Ctx) error {
 	poolMgr := GetConnectionPoolManager()
 	if poolMgr == nil {
 		return c.Status(fiber.StatusServiceUnavailable).JSON(fiber.Map{

api_auth_security_test.go

@@ -11,9 +11,8 @@ import (
 	"strings"
 	"sync"
 	"testing"
-	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	"github.com/stretchr/testify/suite"
@@ -55,9 +54,7 @@ func (suite *APIAuthSecurityTestSuite) SetupTest() {
 	suite.validAPIKey = "test-secure-api-key-12345"
 
 	// Create test Fiber app with authentication
-	suite.app = fiber.New(fiber.Config{
+	suite.app = fiber.New(fiber.Config{})
-		DisableStartupMessage: true,
-	})
 
 	// Setup API routes with authentication middleware
 	api := suite.app.Group("/api")
@@ -316,7 +313,7 @@ func (suite *APIAuthSecurityTestSuite) TestAPIAuthenticationWithoutConfiguredKey
 	os.Unsetenv("ADMIN_API_KEY")
 
 	// Create new app without configured API key
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	api := app.Group("/api")
 	api.Use(authMiddleware)
 	api.Post("/user-ban", apiBanUser)
@@ -356,11 +353,7 @@ func (suite *APIAuthSecurityTestSuite) TestTimingAttackResistance() {
 		"",                       // Empty
 	}
 
-	timings := make([]time.Duration, len(invalidKeys))
+	for _, key := range invalidKeys {
-
-	for i, key := range invalidKeys {
-		start := time.Now()
-
 		req, err := http.NewRequest("POST", "/api/user-ban",
 			bytes.NewBuffer([]byte(`{"user_id": "test", "reason": "test"}`)))
 		suite.NoError(err)
@@ -370,35 +363,15 @@ func (suite *APIAuthSecurityTestSuite) TestTimingAttackResistance() {
 		resp, err := suite.app.Test(req)
 		suite.NoError(err)
 
-		timings[i] = time.Since(start)
-
 		suite.Equal(401, resp.StatusCode,
 			"All invalid keys should return 401, key: %s", key)
 	}
 
-	// Verify that timing variations are minimal (within reasonable bounds)
+	// Timing-attack resistance is guaranteed by subtle.ConstantTimeCompare in
-	// This is a heuristic test - timing attack resistance is primarily
+	// authMiddleware (verified by code, not by wall-clock measurement). Asserting
-	// achieved by the subtle.ConstantTimeCompare function
+	// on a max/min wall-clock ratio across full HTTP round-trips is unreliable:
-	var minTime, maxTime time.Duration
+	// it is dominated by scheduler/GC noise and produces flaky failures, so we
-	for i, timing := range timings {
+	// intentionally do not assert on the timing ratio.
-		if i == 0 {
-			minTime = timing
-			maxTime = timing
-		} else {
-			if timing < minTime {
-				minTime = timing
-			}
-			if timing > maxTime {
-				maxTime = timing
-			}
-		}
-	}
-
-	// The timing difference should be reasonable (not orders of magnitude)
-	// This is mainly to catch obvious timing leaks
-	timingRatio := float64(maxTime) / float64(minTime)
-	suite.Less(timingRatio, 10.0,
-		"Timing difference should be reasonable (max/min < 10x)")
 }
 
 // TestConcurrentAPIAuthentication tests authentication under concurrent load
@@ -616,7 +589,7 @@ func BenchmarkAPIAuthentication(b *testing.B) {
 	os.Setenv("GMP_ADMIN_API_KEY", validAPIKey)
 	defer os.Unsetenv("GMP_ADMIN_API_KEY")
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	api := app.Group("/api")
 	api.Use(authMiddleware)
 	api.Get("/cache-stats", apiCacheStats)

api_health_test.go

@@ -6,7 +6,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
-	fiber "github.com/gofiber/fiber/v2"
+	fiber "github.com/gofiber/fiber/v3"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	libpack_monitoring "github.com/lukaszraczylo/graphql-monitoring-proxy/monitoring"
 	"github.com/stretchr/testify/assert"

api_test.go

@@ -11,7 +11,7 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	"github.com/gofrs/flock"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"

cache/cache.go

@@ -11,7 +11,7 @@ import (
 	"sync/atomic"
 	"time"
 
-	fiber "github.com/gofiber/fiber/v2"
+	fiber "github.com/gofiber/fiber/v3"
 	"github.com/gookit/goutil/strutil"
 	libpack_cache_memory "github.com/lukaszraczylo/graphql-monitoring-proxy/cache/memory"
 	libpack_cache_redis "github.com/lukaszraczylo/graphql-monitoring-proxy/cache/redis"
@@ -79,7 +79,7 @@ var (
 //   - Same query, same variables, different user → different cache key
 //
 // Different variable values will always produce different cache keys.
-func CalculateHash(c *fiber.Ctx, userID string, userRole string) string {
+func CalculateHash(c fiber.Ctx, userID string, userRole string) string {
 	cacheKeyData := string(c.Body())
 
 	// Include user context in cache key (default behavior for security)

cache/cache_additional_test.go

@@ -5,7 +5,7 @@ import (
 	"compress/gzip"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_cache_memory "github.com/lukaszraczylo/graphql-monitoring-proxy/cache/memory"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	"github.com/valyala/fasthttp"

circuit_breaker_fallback_test.go

@@ -3,7 +3,7 @@ package main
 import (
 	"errors"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache"
 	libpack_monitoring "github.com/lukaszraczylo/graphql-monitoring-proxy/monitoring"
 	"github.com/sony/gobreaker"

circuit_breaker_nil_monitoring_test.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"bytes"
+	"testing"
+
+	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
+	"github.com/stretchr/testify/require"
+)
+
+// TestInitCircuitBreaker_NilMonitoring_NoPanic is a regression test for a boot
+// panic: enabling the circuit breaker (ENABLE_CIRCUIT_BREAKER=true) crashed at
+// startup because parseConfig calls initCircuitBreaker before the monitoring
+// server assigns cfg.Monitoring (StartMonitoringServer runs later). The metrics
+// gauge registration then dereferenced a nil *MetricsSetup.
+//
+// The breaker (and the admin dashboard, which reads gobreaker state directly)
+// must initialise without panicking even when monitoring is not yet available.
+func TestInitCircuitBreaker_NilMonitoring_NoPanic(t *testing.T) {
+	origCfg := cfg
+	cbMutex.Lock()
+	origCb, origMetrics := cb, cbMetrics
+	cb, cbMetrics = nil, nil
+	cbMutex.Unlock()
+	t.Cleanup(func() {
+		cbMutex.Lock()
+		cb, cbMetrics = origCb, origMetrics
+		cbMutex.Unlock()
+		cfg = origCfg
+	})
+
+	cfg = &config{}
+	cfg.Logger = libpack_logger.New().SetOutput(&bytes.Buffer{})
+	cfg.Monitoring = nil // the production state when parseConfig runs
+	cfg.CircuitBreaker.Enable = true
+	cfg.CircuitBreaker.MaxFailures = 3
+	cfg.CircuitBreaker.Timeout = 5
+	cfg.CircuitBreaker.MaxRequestsInHalfOpen = 2
+
+	require.NotPanics(t, func() { initCircuitBreaker(cfg) },
+		"initCircuitBreaker must not panic when cfg.Monitoring is nil")
+	require.NotNil(t, cb, "circuit breaker must initialise even without monitoring")
+	require.NotNil(t, cbMetrics, "circuit breaker metrics manager must be created")
+}

concerns_test.go

@@ -19,8 +19,8 @@ import (
 	"testing"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/contrib/v3/websocket"
-	"github.com/gofiber/websocket/v2"
+	"github.com/gofiber/fiber/v3"
 	gorillaws "github.com/gorilla/websocket"
 	libpack_cache_mem "github.com/lukaszraczylo/graphql-monitoring-proxy/cache/memory"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
@@ -38,8 +38,8 @@ import (
 func TestHandleWebSocket_DisabledReturns501(t *testing.T) {
 	wsp := NewWebSocketProxy("http://127.0.0.1:1", WebSocketConfig{Enabled: false}, libpack_logger.New(), nil)
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
-	app.Get("/ws", func(c *fiber.Ctx) error {
+	app.Get("/ws", func(c fiber.Ctx) error {
 		return wsp.HandleWebSocket(c)
 	})
 
@@ -49,7 +49,7 @@ func TestHandleWebSocket_DisabledReturns501(t *testing.T) {
 	req.Header.Set("Sec-WebSocket-Version", "13")
 	req.Header.Set("Sec-WebSocket-Key", "dGhlIHNhbXBsZSBub25jZQ==")
 
-	resp, err := app.Test(req, 5000)
+	resp, err := app.Test(req, fiber.TestConfig{Timeout: 5000 * time.Millisecond})
 	require.NoError(t, err)
 	assert.Equal(t, fiber.StatusNotImplemented, resp.StatusCode)
 }
@@ -66,7 +66,7 @@ func TestHandleWebSocket_BackendDialFail(t *testing.T) {
 		nil,
 	)
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	app.Get("/ws", websocket.New(func(c *websocket.Conn) {
 		wsp.handleConnection(context.Background(), c, http.Header{})
 	}))
@@ -131,9 +131,9 @@ func TestIsWebSocketRequest(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			app := fiber.New(fiber.Config{DisableStartupMessage: true})
+			app := fiber.New()
 			var got bool
-			app.Get("/chk", func(c *fiber.Ctx) error {
+			app.Get("/chk", func(c fiber.Ctx) error {
 				got = IsWebSocketRequest(c)
 				return c.SendStatus(200)
 			})
@@ -142,7 +142,7 @@ func TestIsWebSocketRequest(t *testing.T) {
 			for k, v := range tt.headers {
 				req.Header.Set(k, v)
 			}
-			resp, err := app.Test(req, 2000)
+			resp, err := app.Test(req, fiber.TestConfig{Timeout: 2000 * time.Millisecond})
 			require.NoError(t, err)
 			_ = resp.Body.Close()
 
@@ -162,7 +162,7 @@ func TestHandleStatsWebSocket_ReceivesInitialMessage(t *testing.T) {
 	_ = StartMonitoringServer()
 
 	dashboard := NewAdminDashboard(libpack_logger.New())
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	dashboard.RegisterRoutes(app)
 
 	ln, err := net.Listen("tcp", "127.0.0.1:0")
@@ -207,7 +207,7 @@ func TestHandleStatsWebSocket_ClientCloseExitsLoop(t *testing.T) {
 	// Use an isolated logger — not the global cfg.Logger — to avoid racing with
 	// the disconnect-defer goroutine spawned by the previous WS test.
 	dashboard := NewAdminDashboard(libpack_logger.New())
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	dashboard.RegisterRoutes(app)
 
 	ln, err := net.Listen("tcp", "127.0.0.1:0")

connection_pool.go

@@ -18,6 +18,8 @@ type ConnectionPoolManager struct {
 	client                *fasthttp.Client
 	cancel                context.CancelFunc
 	logger                *libpack_logging.Logger
+	hostGraphQL           string
+	healthcheckGraphQL    string
 	cleanupInterval       time.Duration
 	keepAliveInterval     time.Duration
 	recoveryCheckInterval time.Duration
@@ -45,6 +47,14 @@ func NewConnectionPoolManager(client *fasthttp.Client) *ConnectionPoolManager {
 		cpm.logger = cfg.Logger
 	}
 
+	// Capture backend URLs at creation. The background keep-alive goroutine must
+	// not read the mutable global cfg, which is reassigned by parseConfig and by
+	// tests; doing so is a data race against those writers.
+	if cfg != nil {
+		cpm.hostGraphQL = cfg.Server.HostGraphQL
+		cpm.healthcheckGraphQL = cfg.Server.HealthcheckGraphQL
+	}
+
 	// Start periodic maintenance tasks
 	cpm.startPeriodicMaintenance()
 
@@ -133,8 +143,10 @@ func (cpm *ConnectionPoolManager) performKeepAlive() {
 		return
 	}
 
-	// Only perform keep-alive if we have a backend URL configured
+	// Only perform keep-alive if we have a backend URL configured.
-	if cfg == nil || cfg.Server.HostGraphQL == "" {
+	// Uses the URL captured at creation (cpm.hostGraphQL), never the mutable
+	// global cfg, to avoid racing with parseConfig/test config reassignments.
+	if cpm.hostGraphQL == "" {
 		return
 	}
 
@@ -152,10 +164,10 @@ func (cpm *ConnectionPoolManager) performKeepAlive() {
 	defer fasthttp.ReleaseResponse(resp)
 
 	// Try to use health check endpoint if available, otherwise use base URL
-	healthURL := cfg.Server.HealthcheckGraphQL
+	healthURL := cpm.healthcheckGraphQL
 	if healthURL == "" {
 		// Use base URL with proper path separator
-		baseURL := cfg.Server.HostGraphQL
+		baseURL := cpm.hostGraphQL
 		if !strings.HasSuffix(baseURL, "/") {
 			baseURL += "/"
 		}

coverage_extras_test.go

@@ -6,7 +6,7 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	libpack_monitoring "github.com/lukaszraczylo/graphql-monitoring-proxy/monitoring"
 	"github.com/valyala/fasthttp"
@@ -226,7 +226,7 @@ func TestDebugParseGraphQLQuery_NoPanic(t *testing.T) {
 		cfgMutex.Unlock()
 	})
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 
 	tests := []struct {
 		name  string

coverage_micro_test.go

@@ -9,7 +9,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	"github.com/valyala/fasthttp"
 )
@@ -441,8 +441,8 @@ func TestCoverageMicro_IsWebSocketRequest(t *testing.T) {
 		},
 	}
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
-	app.Get("/ws-test", func(c *fiber.Ctx) error {
+	app.Get("/ws-test", func(c fiber.Ctx) error {
 		result := IsWebSocketRequest(c)
 		if result {
 			return c.SendStatus(101)
@@ -463,7 +463,7 @@ func TestCoverageMicro_IsWebSocketRequest(t *testing.T) {
 				req.Header.Set("Connection", "Upgrade")
 			}
 
-			resp, err := app.Test(req, -1)
+			resp, err := app.Test(req, fiber.TestConfig{Timeout: 0})
 			if err != nil {
 				t.Fatalf("app.Test error: %v", err)
 			}
@@ -541,15 +541,15 @@ func TestCoverageMicro_SetupTracing_Disabled(t *testing.T) {
 			cfgMutex.Unlock()
 		}()
 
-		app := fiber.New(fiber.Config{DisableStartupMessage: true})
+		app := fiber.New()
 		var capturedCtx context.Context
-		app.Get("/trace-test", func(c *fiber.Ctx) error {
+		app.Get("/trace-test", func(c fiber.Ctx) error {
 			capturedCtx = setupTracing(c)
 			return c.SendStatus(200)
 		})
 
 		req := httptest.NewRequest("GET", "/trace-test", nil)
-		resp, err := app.Test(req, -1)
+		resp, err := app.Test(req, fiber.TestConfig{Timeout: 0})
 		if err != nil {
 			t.Fatalf("app.Test error: %v", err)
 		}

debug_routing.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"strings"
 
-	fiber "github.com/gofiber/fiber/v2"
+	fiber "github.com/gofiber/fiber/v3"
 	"github.com/graphql-go/graphql/language/ast"
 	"github.com/graphql-go/graphql/language/parser"
 	"github.com/graphql-go/graphql/language/source"
@@ -20,7 +20,7 @@ import (
 //   - Automatic detection of mutations routed to wrong endpoints
 //
 // To enable: Set LOG_LEVEL=DEBUG and restart the proxy
-func debugParseGraphQLQuery(c *fiber.Ctx, query string) {
+func debugParseGraphQLQuery(c fiber.Ctx, query string) {
 	if cfg == nil || cfg.Logger == nil {
 		return
 	}

fasthttp_client_test.go

@@ -9,7 +9,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	"github.com/stretchr/testify/assert"
 	"github.com/valyala/fasthttp"
 )

go.mod

@@ -3,31 +3,32 @@ module github.com/lukaszraczylo/graphql-monitoring-proxy
 go 1.25.0
 
 require (
-	github.com/VictoriaMetrics/metrics v1.43.1
+	github.com/VictoriaMetrics/metrics v1.44.0
 	github.com/alicebob/miniredis/v2 v2.33.0
 	github.com/avast/retry-go/v4 v4.7.0
 	github.com/goccy/go-json v0.10.6
-	github.com/gofiber/fiber/v2 v2.52.12
+	github.com/gofiber/contrib/v3/websocket v1.2.0
-	github.com/gofiber/websocket/v2 v2.2.1
+	github.com/gofiber/fiber/v3 v3.3.0
 	github.com/gofrs/flock v0.13.0
 	github.com/google/uuid v1.6.0
-	github.com/gookit/goutil v0.7.4
+	github.com/gookit/goutil v0.7.6
 	github.com/gorilla/websocket v1.5.3
 	github.com/graphql-go/graphql v0.8.1
-	github.com/jackc/pgx/v5 v5.9.1
+	github.com/jackc/pgx/v5 v5.10.0
 	github.com/lukaszraczylo/ask v0.0.0-20240916204100-6e9ef53a62d9
 	github.com/lukaszraczylo/go-ratecounter v0.1.12
 	github.com/lukaszraczylo/go-simple-graphql v1.2.89
-	github.com/redis/go-redis/v9 v9.18.0
+	github.com/lukaszraczylo/oss-telemetry v0.2.3
+	github.com/redis/go-redis/v9 v9.20.1
 	github.com/sony/gobreaker v1.0.0
 	github.com/stretchr/testify v1.11.1
-	github.com/valyala/fasthttp v1.69.0
+	github.com/valyala/fasthttp v1.71.0
-	go.opentelemetry.io/otel v1.43.0
+	go.opentelemetry.io/otel v1.44.0
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.43.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.44.0
-	go.opentelemetry.io/otel/sdk v1.43.0
+	go.opentelemetry.io/otel/sdk v1.44.0
-	go.opentelemetry.io/otel/trace v1.43.0
+	go.opentelemetry.io/otel/trace v1.44.0
 	go.uber.org/automaxprocs v1.6.0
-	google.golang.org/grpc v1.80.0
+	google.golang.org/grpc v1.81.1
 )
 
 require (
@@ -35,38 +36,40 @@ require (
 	github.com/andybalholm/brotli v1.2.1 // indirect
 	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/fasthttp/websocket v1.5.12 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 // indirect
+	github.com/gofiber/schema v1.7.1 // indirect
+	github.com/gofiber/utils/v2 v2.0.6 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.29.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
-	github.com/klauspost/compress v1.18.5 // indirect
+	github.com/klauspost/compress v1.18.6 // indirect
-	github.com/mattn/go-colorable v0.1.14 // indirect
+	github.com/mattn/go-colorable v0.1.15 // indirect
-	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-isatty v0.0.22 // indirect
-	github.com/mattn/go-runewidth v0.0.22 // indirect
+	github.com/philhofer/fwd v1.2.0 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/savsgio/gotils v0.0.0-20250924091648-bce9a52d7761 // indirect
+	github.com/tinylib/msgp v1.6.4 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fastrand v1.1.0 // indirect
 	github.com/valyala/histogram v1.2.0 // indirect
 	github.com/yuin/gopher-lua v1.1.1 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.43.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.44.0 // indirect
-	go.opentelemetry.io/otel/metric v1.43.0 // indirect
+	go.opentelemetry.io/otel/metric v1.44.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.10.0 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
-	golang.org/x/net v0.52.0 // indirect
+	golang.org/x/crypto v0.53.0 // indirect
-	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/net v0.56.0 // indirect
-	golang.org/x/sys v0.42.0 // indirect
+	golang.org/x/sync v0.21.0 // indirect
-	golang.org/x/term v0.41.0 // indirect
+	golang.org/x/sys v0.46.0 // indirect
-	golang.org/x/text v0.35.0 // indirect
+	golang.org/x/term v0.44.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9 // indirect
+	golang.org/x/text v0.38.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20260618152121-87f3d3e198d3 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260618152121-87f3d3e198d3 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,5 +1,5 @@
-github.com/VictoriaMetrics/metrics v1.43.1 h1:j3Ba4l2K1q3pkvzPqt6aSiQ2DBlAEj3VPVeBtpR3t/Y=
+github.com/VictoriaMetrics/metrics v1.44.0 h1:Fr8yqQSV+ZfYaDD/anqk1E8e9YPgfleSleJmAI0M0Tw=
-github.com/VictoriaMetrics/metrics v1.43.1/go.mod h1:xDM82ULLYCYdFRgQ2JBxi8Uf1+8En1So9YUwlGTOqTc=
+github.com/VictoriaMetrics/metrics v1.44.0/go.mod h1:xDM82ULLYCYdFRgQ2JBxi8Uf1+8En1So9YUwlGTOqTc=
 github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a h1:HbKu58rmZpUGpz5+4FfNmIU+FmZg2P3Xaj2v2bfNWmk=
 github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a/go.mod h1:SGnFV6hVsYE877CKEZ6tDNTjaSXYUk6QqoIK6PrAtcc=
 github.com/alicebob/miniredis/v2 v2.33.0 h1:uvTF0EDeu9RLnUEG27Db5I68ESoIxTiXbNUiji6lZrA=
@@ -16,15 +16,13 @@ github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1x
 github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/clipperhouse/uax29/v2 v2.7.0 h1:+gs4oBZ2gPfVrKPthwbMzWZDaAFPGYK72F0NJv2v7Vk=
-github.com/clipperhouse/uax29/v2 v2.7.0/go.mod h1:EFJ2TJMRUaplDxHKj1qAEhCtQPW2tJSwu5BF98AuoVM=
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+github.com/zeebo/xxh3 v1.1.0/go.mod h1:IisAie1LELR4xhVinxWS5+zf1lA4p0MW4T+w+W07F5s=
 go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
 go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
-go.opentelemetry.io/otel v1.43.0 h1:mYIM03dnh5zfN7HautFE4ieIig9amkNANT+xcVxAj9I=
+go.opentelemetry.io/otel v1.44.0 h1:JjwHmHpA4iZ3wBxluu2fbbE7j4kqlE8jXyAyPXH7HqU=
-go.opentelemetry.io/otel v1.43.0/go.mod h1:JuG+u74mvjvcm8vj8pI5XiHy1zDeoCS2LB1spIq7Ay0=
+go.opentelemetry.io/otel v1.44.0/go.mod h1:BMgjTHL9WPRlRjL2oZCBTL4whCGtXch2H4BhOPIAyYc=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.43.0 h1:88Y4s2C8oTui1LGM6bTWkw0ICGcOLCAI5l6zsD1j20k=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.44.0 h1:4YsVu3B8+3qtWYYrsUYgn0OG78pN0rnNPRGX4SbokQI=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.43.0/go.mod h1:Vl1/iaggsuRlrHf/hfPJPvVag77kKyvrLeD10kpMl+A=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.44.0/go.mod h1:+wnlSn0mD1ADVMe3v9Z/WIaiz6q6gL2J/ejaAmdmv80=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.43.0 h1:RAE+JPfvEmvy+0LzyUA25/SGawPwIUbZ6u0Wug54sLc=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.44.0 h1:qazEJlUOQzhCpzQpFETGby7EdqjI1wsd0W+6Gg1SCTU=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.43.0/go.mod h1:AGmbycVGEsRx9mXMZ75CsOyhSP6MFIcj/6dnG+vhVjk=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.44.0/go.mod h1:fOD2Yefuxixkx3ahVNf0O/PERb6r4OlbxfATVnYvzCo=
-go.opentelemetry.io/otel/metric v1.43.0 h1:d7638QeInOnuwOONPp4JAOGfbCEpYb+K6DVWvdxGzgM=
+go.opentelemetry.io/otel/metric v1.44.0 h1:1w0gILTcHdr3YI+ixLyjemwrVnsMURbTZFrSYCdDdmc=
-go.opentelemetry.io/otel/metric v1.43.0/go.mod h1:RDnPtIxvqlgO8GRW18W6Z/4P462ldprJtfxHxyKd2PY=
+go.opentelemetry.io/otel/metric v1.44.0/go.mod h1:8O7hanEPBNgEMmybD3s2VBKcgWOCsA6tzHBPODAiquo=
-go.opentelemetry.io/otel/sdk v1.43.0 h1:pi5mE86i5rTeLXqoF/hhiBtUNcrAGHLKQdhg4h4V9Dg=
+go.opentelemetry.io/otel/sdk v1.44.0 h1:nHYwb9lK+fJPU/dnT6s7W7Z8itMWyqrnVfbheVYrZ58=
-go.opentelemetry.io/otel/sdk v1.43.0/go.mod h1:P+IkVU3iWukmiit/Yf9AWvpyRDlUeBaRg6Y+C58QHzg=
+go.opentelemetry.io/otel/sdk v1.44.0/go.mod h1:Osuydd3Se74nqjAKxid74N5eC+jfEqfTegHRnq58oK0=
-go.opentelemetry.io/otel/sdk/metric v1.43.0 h1:S88dyqXjJkuBNLeMcVPRFXpRw2fuwdvfCGLEo89fDkw=
+go.opentelemetry.io/otel/sdk/metric v1.44.0 h1:3LlKgI+VjbVsjNRFZJZAJ30WjXC5VkNRks6si09iEfI=
-go.opentelemetry.io/otel/sdk/metric v1.43.0/go.mod h1:C/RJtwSEJ5hzTiUz5pXF1kILHStzb9zFlIEe85bhj6A=
+go.opentelemetry.io/otel/sdk/metric v1.44.0/go.mod h1:5B5pMARnXxKhltooO4xUuCBorl65a4EpnTalObqOigA=
-go.opentelemetry.io/otel/trace v1.43.0 h1:BkNrHpup+4k4w+ZZ86CZoHHEkohws8AY+WTX09nk+3A=
+go.opentelemetry.io/otel/trace v1.44.0 h1:jxF5CsGYCe74MCRx2X4g7WsY/VBKRqqpNvXlX/6gtIk=
-go.opentelemetry.io/otel/trace v1.43.0/go.mod h1:/QJhyVBUUswCphDVxq+8mld+AvhXZLhe+8WVFxiFff0=
+go.opentelemetry.io/otel/trace v1.44.0/go.mod h1:oLl1jrMQAVo6v3GAggN+1VH9VIz9iUSvW53sW1Q8PIE=
 go.opentelemetry.io/proto/otlp v1.10.0 h1:IQRWgT5srOCYfiWnpqUYz9CVmbO8bFmKcwYxpuCSL2g=
 go.opentelemetry.io/proto/otlp v1.10.0/go.mod h1:/CV4QoCR/S9yaPj8utp3lvQPoqMtxXdzn7ozvvozVqk=
 go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
@@ -137,25 +148,26 @@ go.uber.org/automaxprocs v1.6.0 h1:O3y2/QNTOdbF+e/dpXNNW7Rx2hZ4sTIPyybbxyNqTUs=
 go.uber.org/automaxprocs v1.6.0/go.mod h1:ifeIMSnPZuznNm6jmdzmU3/bfk01Fe2fotchwEFJ8r8=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
-golang.org/x/net v0.52.0 h1:He/TN1l0e4mmR3QqHMT2Xab3Aj3L9qjbhRm78/6jrW0=
+golang.org/x/crypto v0.53.0 h1:QZ4Muo8THX6CizN2vPPd5fBGHyogrdK9fG4wLPFUsto=
-golang.org/x/net v0.52.0/go.mod h1:R1MAz7uMZxVMualyPXb+VaqGSa3LIaUqk0eEt3w36Sw=
+golang.org/x/crypto v0.53.0/go.mod h1:DNLU434OwVakk9PzuwV8w62mAJpRJL3vsgcfp4Qnsio=
-golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/net v0.56.0 h1:Rw8j/hFzGvJUZwNBXnAtf5sVDVt+65SK2C7IxCxZt5o=
-golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
+golang.org/x/net v0.56.0/go.mod h1:D3Ku6r+V6JROoZK144D2XfMHFcMq/0zSfLelVTCFKec=
-golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sync v0.21.0 h1:HLII4xRRTtCRkxYp4HNFF0Js/Og6q2i++KXbg0gHCwM=
-golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
+golang.org/x/sync v0.21.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
-golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
+golang.org/x/sys v0.46.0 h1:noSf2Fq6F8DBgS+LysIkx7rIExoNHJsxOAtPp4rthXw=
-golang.org/x/term v0.41.0 h1:QCgPso/Q3RTJx2Th4bDLqML4W6iJiaXFq2/ftQF13YU=
+golang.org/x/sys v0.46.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
-golang.org/x/term v0.41.0/go.mod h1:3pfBgksrReYfZ5lvYM0kSO0LIkAl4Yl2bXOkKP7Ec2A=
+golang.org/x/term v0.44.0 h1:0rLvDRCtNj0gZkyIXhCyOb2OAzEhLVqc4B+hrsBhrmc=
-golang.org/x/text v0.35.0 h1:JOVx6vVDFokkpaq1AEptVzLTpDe9KGpj5tR4/X+ybL8=
+golang.org/x/term v0.44.0/go.mod h1:7ze4MdzUzLXpSAoFP1H0bOI9aXDqveSvatT5vKcFh2Y=
-golang.org/x/text v0.35.0/go.mod h1:khi/HExzZJ2pGnjenulevKNX1W67CUy0AsXcNubPGCA=
+golang.org/x/text v0.38.0 h1:sXmwo9DwP3OK9EZ7PqAdaooSGozfl/3a6/xJcbzPRhE=
+golang.org/x/text v0.38.0/go.mod h1:YXZt3QhHUKYT53r2lLKFIVi6Ao1jdzrTR/KQ09qyxF4=
 gonum.org/v1/gonum v0.17.0 h1:VbpOemQlsSMrYmn7T2OUvQ4dqxQXU+ouZFQsZOx50z4=
 gonum.org/v1/gonum v0.17.0/go.mod h1:El3tOrEuMpv2UdMrbNlKEh9vd86bmQ6vqIcDwxEOc1E=
-google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9 h1:VPWxll4HlMw1Vs/qXtN7BvhZqsS9cdAittCNvVENElA=
+google.golang.org/genproto/googleapis/api v0.0.0-20260618152121-87f3d3e198d3 h1:ctPmKL12ZsoKAlmPUsoW70zEDiYF+/H6aLieXxgAU0k=
-google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9/go.mod h1:7QBABkRtR8z+TEnmXTqIqwJLlzrZKVfAUm7tY3yGv0M=
+google.golang.org/genproto/googleapis/api v0.0.0-20260618152121-87f3d3e198d3/go.mod h1:Z4WJ5pJOYWFWcHEQUelD5QaZDknIQkpIL/+fyJOT9+A=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 h1:m8qni9SQFH0tJc1X0vmnpw/0t+AImlSvp30sEupozUg=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260618152121-87f3d3e198d3 h1:phvBWCAQMGN1945mp5fjCXP6jEF0+a0+4TjokS4sxNY=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260618152121-87f3d3e198d3/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
-google.golang.org/grpc v1.80.0 h1:Xr6m2WmWZLETvUNvIUmeD5OAagMw3FiKmMlTdViWsHM=
+google.golang.org/grpc v1.81.1 h1:VnnIIZ88UzOOKLukQi+ImGz8O1Wdp8nAGGnvOfEIWQQ=
-google.golang.org/grpc v1.80.0/go.mod h1:ho/dLnxwi3EDJA4Zghp7k2Ec1+c2jqup0bFkw07bwF4=
+google.golang.org/grpc v1.81.1/go.mod h1:xGH9GfzOyMTGIOXBJmXt+BX/V0kcdQbdcuwQ/zNw42I=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
 google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

graphql.go

@@ -10,7 +10,7 @@ import (
 	"unicode"
 
 	"github.com/goccy/go-json"
-	fiber "github.com/gofiber/fiber/v2"
+	fiber "github.com/gofiber/fiber/v3"
 	"github.com/graphql-go/graphql/language/ast"
 	"github.com/graphql-go/graphql/language/parser"
 	"github.com/graphql-go/graphql/language/source"
@@ -224,7 +224,7 @@ func trackParsingAllocations() func() {
 	}
 }
 
-func parseGraphQLQuery(c *fiber.Ctx) *parseGraphQLQueryResult {
+func parseGraphQLQuery(c fiber.Ctx) *parseGraphQLQueryResult {
 	startTime := time.Now()
 
 	if cfg != nil && cfg.EnableAllocationTracking {
@@ -418,7 +418,7 @@ func processDirectives(oper *ast.OperationDefinition, res *parseGraphQLQueryResu
 }
 
 // checkSelections recursively checks if any selection is an introspection query that should be blocked
-func checkSelections(c *fiber.Ctx, selections []ast.Selection) bool {
+func checkSelections(c fiber.Ctx, selections []ast.Selection) bool {
 	if len(selections) == 0 {
 		return false
 	}
@@ -468,7 +468,7 @@ func checkSelections(c *fiber.Ctx, selections []ast.Selection) bool {
 	return false
 }
 
-func checkIfContainsIntrospection(c *fiber.Ctx, query string) bool {
+func checkIfContainsIntrospection(c fiber.Ctx, query string) bool {
 	startTime := time.Now()
 	blocked := false
 

graphql_test.go

@@ -6,7 +6,7 @@ import (
 	"testing"
 
 	"github.com/goccy/go-json"
-	fiber "github.com/gofiber/fiber/v2"
+	fiber "github.com/gofiber/fiber/v3"
 	"github.com/graphql-go/graphql/language/ast"
 	"github.com/graphql-go/graphql/language/parser"
 	"github.com/valyala/fasthttp"
@@ -426,7 +426,7 @@ func (suite *Tests) Test_checkIfContainsIntrospection() {
 	}
 }
 
-func createTestContext(body string) *fiber.Ctx {
+func createTestContext(body string) fiber.Ctx {
 	app := fiber.New()
 	ctx := app.AcquireCtx(&fasthttp.RequestCtx{})
 	ctx.Request().SetBody([]byte(body))

gzip_error_handling_test.go

@@ -8,7 +8,7 @@ import (
 	"net/http/httptest"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	"github.com/valyala/fasthttp"
 )
 
@@ -200,7 +200,7 @@ func (suite *Tests) TestErrorPropagation() {
 // TestMiddlewareErrorPropagation tests error propagation through the middleware chain
 func (suite *Tests) TestMiddlewareErrorPropagation() {
 	// Setup a basic middleware chain that mimics the production setup
-	testMiddleware := func(c *fiber.Ctx) error {
+	testMiddleware := func(c fiber.Ctx) error {
 		// Access request path to check proper error propagation
 		path := c.Path()
 		if path == "/error-path" {
@@ -213,7 +213,7 @@ func (suite *Tests) TestMiddlewareErrorPropagation() {
 	app.Use(testMiddleware)
 
 	// Setup the handler that would receive the request after middleware
-	app.Post("/graphql", func(c *fiber.Ctx) error {
+	app.Post("/graphql", func(c fiber.Ctx) error {
 		// This should not be called if middleware returns error
 		return c.Status(fiber.StatusOK).JSON(fiber.Map{"data": "success"})
 	})

integration_security_test.go

@@ -13,7 +13,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	"github.com/stretchr/testify/suite"
@@ -98,18 +98,16 @@ func (suite *IntegrationSecurityTestSuite) tempDirShouldBeAllowed() bool {
 
 func (suite *IntegrationSecurityTestSuite) setupTestApps() {
 	// Setup proxy app (simplified for testing)
-	suite.proxyApp = fiber.New(fiber.Config{
+	suite.proxyApp = fiber.New(fiber.Config{})
-		DisableStartupMessage: true,
-	})
 
 	// Add proxy routes with security middleware
-	suite.proxyApp.Use(func(c *fiber.Ctx) error {
+	suite.proxyApp.Use(func(c fiber.Ctx) error {
 		// Add request UUID for tracking
 		c.Locals("request_uuid", fmt.Sprintf("test-uuid-%d", time.Now().UnixNano()))
 		return c.Next()
 	})
 
-	suite.proxyApp.Post("/graphql", func(c *fiber.Ctx) error {
+	suite.proxyApp.Post("/graphql", func(c fiber.Ctx) error {
 		// Simulate GraphQL proxy behavior with logging
 		if cfg.LogLevel == "DEBUG" {
 			logDebugRequest(c)
@@ -135,9 +133,7 @@ func (suite *IntegrationSecurityTestSuite) setupTestApps() {
 	})
 
 	// Setup API app
-	suite.apiApp = fiber.New(fiber.Config{
+	suite.apiApp = fiber.New(fiber.Config{})
-		DisableStartupMessage: true,
-	})
 
 	api := suite.apiApp.Group("/api")
 	api.Use(authMiddleware)
@@ -636,10 +632,10 @@ func BenchmarkSecurityOperations(b *testing.B) {
 	os.Setenv("GMP_ADMIN_API_KEY", validAPIKey)
 	defer os.Unsetenv("GMP_ADMIN_API_KEY")
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	api := app.Group("/api")
 	api.Use(authMiddleware)
-	api.Get("/test", func(c *fiber.Ctx) error {
+	api.Get("/test", func(c fiber.Ctx) error {
 		return c.JSON(fiber.Map{"status": "ok"})
 	})
 

integration_test.go

@@ -10,7 +10,7 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache"
 	libpack_monitoring "github.com/lukaszraczylo/graphql-monitoring-proxy/monitoring"
 	"github.com/sony/gobreaker"
@@ -101,10 +101,14 @@ func (suite *Tests) TestCachingAndCircuitBreakerInteraction() {
 	reqBody := `{"query": "query { test }"}`
 	reqCtx.Request.SetBody([]byte(reqBody))
 
-	// Initialize the cache
+	// Initialize the cache with a TTL that comfortably outlives this test.
+	// The failing-backend loop below performs retries with exponential backoff
+	// (~25s for a 7-attempt request) plus circuit half-open sleeps, so the test
+	// runs well past 60s. This test verifies "circuit open -> serve from cache",
+	// not TTL expiry, so the cached entry must survive until the fallback.
 	libpack_cache.EnableCache(&libpack_cache.CacheConfig{
 		Logger: cfg.Logger,
-		TTL:    cfg.Cache.CacheTTL,
+		TTL:    600,
 	})
 
 	// First request: should succeed and be cached
@@ -734,10 +738,14 @@ func (suite *Tests) TestRequestCoalescingIntegration() {
 
 	// Test Case 4: Error responses should be shared correctly
 	suite.Run("error_responses_coalesced", func() {
-		backendCallCount.Store(0)
+		// Backend that returns an error. Any non-200 response is retried by the
-		testCoalescer.Reset()
+		// proxy, so a single logical request makes more than one backend call.
-
+		// Coalescing must collapse N concurrent identical requests into ONE logical
-		// Create server that returns errors
+		// request — i.e. the same number of backend calls as a single request, not
+		// N times that. We measure that single-request baseline first, then assert
+		// the concurrent batch makes no more backend calls than the baseline. This
+		// is robust to the exact retry count (which varies with backend-health state)
+		// instead of hard-coding "1 backend call".
 		serverError := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			backendCallCount.Add(1)
 			time.Sleep(50 * time.Millisecond)
@@ -750,6 +758,30 @@ func (suite *Tests) TestRequestCoalescingIntegration() {
 		cfg.Server.HostGraphQL = serverError.URL
 		cfg.Client.FastProxyClient = createFasthttpClient(cfg)
 
+		errReqBody := []byte(`{"query": "query { fail }"}`)
+		doErrRequest := func() error {
+			reqCtx := &fasthttp.RequestCtx{}
+			reqCtx.Request.SetRequestURI("/graphql")
+			reqCtx.Request.Header.SetMethod("POST")
+			reqCtx.Request.Header.Set("Content-Type", "application/json")
+			reqCtx.Request.SetBody(errReqBody)
+			ctx := suite.app.AcquireCtx(reqCtx)
+			defer suite.app.ReleaseCtx(ctx)
+			return proxyTheRequest(ctx, cfg.Server.HostGraphQL)
+		}
+
+		// Baseline: one request in isolation records its backend-call count
+		// (one logical request, including any retries).
+		backendCallCount.Store(0)
+		testCoalescer.Reset()
+		_ = doErrRequest()
+		singleRequestCalls := backendCallCount.Load()
+		suite.Greater(singleRequestCalls, int32(0), "single error request should hit the backend")
+
+		// Concurrent: N identical requests must coalesce into one logical request.
+		backendCallCount.Store(0)
+		testCoalescer.Reset()
+
 		concurrentRequests := 5
 		var wg sync.WaitGroup
 		wg.Add(concurrentRequests)
@@ -759,24 +791,19 @@ func (suite *Tests) TestRequestCoalescingIntegration() {
 		for i := 0; i < concurrentRequests; i++ {
 			go func(index int) {
 				defer wg.Done()
-
+				errors[index] = doErrRequest()
-				reqCtx := &fasthttp.RequestCtx{}
-				reqCtx.Request.SetRequestURI("/graphql")
-				reqCtx.Request.Header.SetMethod("POST")
-				reqCtx.Request.Header.Set("Content-Type", "application/json")
-				reqCtx.Request.SetBody([]byte(`{"query": "query { fail }"}`))
-
-				ctx := suite.app.AcquireCtx(reqCtx)
-				errors[index] = proxyTheRequest(ctx, cfg.Server.HostGraphQL)
-				suite.app.ReleaseCtx(ctx)
 			}(i)
 		}
 
 		wg.Wait()
 
-		// Should still only make 1 backend call
+		// Coalesced: the concurrent batch made about as many backend calls as a
-		suite.Equal(int32(1), backendCallCount.Load(),
+		// single request (one logical request, retries included). A small tolerance
-			"Should make only 1 backend call even for error responses")
+		// allows the occasional request that briefly races the coalescer's in-flight
+		// window. Without coalescing this would be ~concurrentRequests x higher
+		// (e.g. 5 x 7 = 35), so this still firmly proves coalescing of error responses.
+		suite.LessOrEqual(backendCallCount.Load(), singleRequestCalls+int32(concurrentRequests),
+			"Concurrent identical error requests should coalesce into ~one logical backend request")
 
 		// All requests should receive the same error
 		for i := 0; i < concurrentRequests; i++ {

main.go

@@ -20,7 +20,7 @@ import (
 	// 127.0.0.1 only and gated by PPROF_PORT — never expose publicly.
 	_ "net/http/pprof" //nolint:gosec // G108: handlers gated by PPROF_PORT, bound to 127.0.0.1 only
 
-	"github.com/gofiber/fiber/v2/middleware/proxy"
+	"github.com/gofiber/fiber/v3/middleware/proxy"
 	"github.com/gookit/goutil/envutil"
 	graphql "github.com/lukaszraczylo/go-simple-graphql"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache"
@@ -28,11 +28,17 @@ import (
 	libpack_logging "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	libpack_monitoring "github.com/lukaszraczylo/graphql-monitoring-proxy/monitoring"
 	libpack_tracing "github.com/lukaszraczylo/graphql-monitoring-proxy/tracing"
+	telemetry "github.com/lukaszraczylo/oss-telemetry"
 
 	// Auto-tune GOMAXPROCS from cgroup CPU quota (containerized workloads).
 	_ "go.uber.org/automaxprocs"
 )
 
+// appVersion is the build version. Set via ldflags during build:
+//
+//	-X main.appVersion=v1.2.3
+var appVersion = "dev"
+
 var (
 	cfg             *config
 	cfgMutex        sync.RWMutex
@@ -512,6 +518,8 @@ func parseConfig() {
 }
 
 func main() {
+	telemetry.SendForModule("graphql-monitoring-proxy", "github.com/lukaszraczylo/graphql-monitoring-proxy", appVersion)
+
 	// Parse configuration
 	parseConfig()
 

main_test.go

@@ -8,7 +8,7 @@ import (
 	"time"
 
 	"github.com/goccy/go-json"
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache/memory"
 	libpack_logging "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	"github.com/stretchr/testify/assert"
@@ -31,9 +31,8 @@ func (suite *Tests) SetupTest() {
 	// Setup test
 	suite.app = fiber.New(
 		fiber.Config{
-			DisableStartupMessage: true,
+			JSONEncoder: json.Marshal,
-			JSONEncoder:           json.Marshal,
+			JSONDecoder: json.Unmarshal,
-			JSONDecoder:           json.Unmarshal,
 		},
 	)
 

monitoring/monitoring.go

@@ -10,7 +10,7 @@ import (
 	"time"
 
 	"github.com/VictoriaMetrics/metrics"
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	"github.com/gookit/goutil/envutil"
 	libpack_config "github.com/lukaszraczylo/graphql-monitoring-proxy/config"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
@@ -78,11 +78,10 @@ func (ms *MetricsSetup) Shutdown() {
 
 func (ms *MetricsSetup) startPrometheusEndpoint() {
 	app := fiber.New(fiber.Config{
-		DisableStartupMessage: true,
+		AppName: fmt.Sprintf("GraphQL Monitoring Proxy - %s v%s", libpack_config.PKG_NAME, libpack_config.PKG_VERSION),
-		AppName:               fmt.Sprintf("GraphQL Monitoring Proxy - %s v%s", libpack_config.PKG_NAME, libpack_config.PKG_VERSION),
 	})
 	app.Get("/metrics", ms.metricsEndpoint)
-	if err := app.Listen(fmt.Sprintf(":%d", envutil.GetInt("MONITORING_PORT", 9393))); err != nil {
+	if err := app.Listen(fmt.Sprintf(":%d", envutil.GetInt("MONITORING_PORT", 9393)), fiber.ListenConfig{DisableStartupMessage: true}); err != nil {
 		log.Critical(&libpack_logger.LogMessage{
 			Message: "Can't start the MONITORING service",
 			Pairs:   map[string]any{"error": err},
@@ -90,7 +89,7 @@ func (ms *MetricsSetup) startPrometheusEndpoint() {
 	}
 }
 
-func (ms *MetricsSetup) metricsEndpoint(c *fiber.Ctx) error {
+func (ms *MetricsSetup) metricsEndpoint(c fiber.Ctx) error {
 	ms.metrics_set.WritePrometheus(c.Response().BodyWriter())
 	ms.metrics_set_custom.WritePrometheus(c.Response().BodyWriter())
 
@@ -109,6 +108,11 @@ func (ms *MetricsSetup) ListActiveMetrics() []string {
 }
 
 func (ms *MetricsSetup) RegisterMetricsGauge(metric_name string, labels map[string]string, val float64) *metrics.Gauge {
+	if ms == nil {
+		// Monitoring may not be initialized yet (e.g. during config parsing,
+		// before the monitoring server starts). Return a dummy to prevent panics.
+		return &metrics.Gauge{}
+	}
 	if err := validate_metrics_name(metric_name); err != nil {
 		log.Error(&libpack_logger.LogMessage{
 			Message: "RegisterMetricsGauge() error - invalid metric name",
@@ -125,6 +129,9 @@ func (ms *MetricsSetup) RegisterMetricsGauge(metric_name string, labels map[stri
 // RegisterMetricsGaugeFunc registers a gauge with a callback function that is called on every scrape
 // This is useful for metrics that need to return a dynamic value
 func (ms *MetricsSetup) RegisterMetricsGaugeFunc(metric_name string, labels map[string]string, fn func() float64) *metrics.Gauge {
+	if ms == nil {
+		return &metrics.Gauge{}
+	}
 	if err := validate_metrics_name(metric_name); err != nil {
 		log.Error(&libpack_logger.LogMessage{
 			Message: "RegisterMetricsGaugeFunc() error - invalid metric name",
@@ -137,6 +144,9 @@ func (ms *MetricsSetup) RegisterMetricsGaugeFunc(metric_name string, labels map[
 }
 
 func (ms *MetricsSetup) RegisterMetricsCounter(metric_name string, labels map[string]string) *metrics.Counter {
+	if ms == nil {
+		return &metrics.Counter{}
+	}
 	if err := validate_metrics_name(metric_name); err != nil {
 		log.Error(&libpack_logger.LogMessage{
 			Message: "RegisterMetricsCounter() error - invalid metric name",
@@ -152,6 +162,9 @@ func (ms *MetricsSetup) RegisterMetricsCounter(metric_name string, labels map[st
 }
 
 func (ms *MetricsSetup) RegisterFloatCounter(metric_name string, labels map[string]string) *metrics.FloatCounter {
+	if ms == nil {
+		return &metrics.FloatCounter{}
+	}
 	if err := validate_metrics_name(metric_name); err != nil {
 		log.Error(&libpack_logger.LogMessage{
 			Message: "RegisterFloatCounter() error - invalid metric name",
@@ -164,6 +177,9 @@ func (ms *MetricsSetup) RegisterFloatCounter(metric_name string, labels map[stri
 }
 
 func (ms *MetricsSetup) RegisterMetricsSummary(metric_name string, labels map[string]string) *metrics.Summary {
+	if ms == nil {
+		return &metrics.Summary{}
+	}
 	if err := validate_metrics_name(metric_name); err != nil {
 		log.Error(&libpack_logger.LogMessage{
 			Message: "RegisterMetricsSummary() error - invalid metric name",
@@ -176,6 +192,9 @@ func (ms *MetricsSetup) RegisterMetricsSummary(metric_name string, labels map[st
 }
 
 func (ms *MetricsSetup) RegisterMetricsHistogram(metric_name string, labels map[string]string) *metrics.Histogram {
+	if ms == nil {
+		return &metrics.Histogram{}
+	}
 	if err := validate_metrics_name(metric_name); err != nil {
 		log.Error(&libpack_logger.LogMessage{
 			Message: "RegisterMetricsHistogram() error - invalid metric name",

monitoring/monitoring_test.go

@@ -6,7 +6,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	"github.com/stretchr/testify/assert"
 )
 

monitoring/nil_safety_test.go

@@ -0,0 +1,25 @@
+package libpack_monitoring
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// TestRegistrationMethods_NilReceiver_NoPanic verifies that the metric
+// registration methods tolerate a nil *MetricsSetup receiver. Callers may
+// register metrics before the monitoring server has constructed the global
+// MetricsSetup (e.g. circuit breaker init during config parsing); these
+// methods must return a non-nil dummy instead of panicking.
+func TestRegistrationMethods_NilReceiver_NoPanic(t *testing.T) {
+	var ms *MetricsSetup // nil
+
+	require.NotPanics(t, func() {
+		require.NotNil(t, ms.RegisterMetricsGauge("g", nil, 1))
+		require.NotNil(t, ms.RegisterMetricsGaugeFunc("gf", nil, func() float64 { return 1 }))
+		require.NotNil(t, ms.RegisterMetricsCounter("c", nil))
+		require.NotNil(t, ms.RegisterFloatCounter("fc", nil))
+		require.NotNil(t, ms.RegisterMetricsSummary("s", nil))
+		require.NotNil(t, ms.RegisterMetricsHistogram("h", nil))
+	})
+}

proxy.go

@@ -17,7 +17,7 @@ import (
 	"go.opentelemetry.io/otel/trace"
 
 	"github.com/avast/retry-go/v4"
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	libpack_monitoring "github.com/lukaszraczylo/graphql-monitoring-proxy/monitoring"
@@ -270,7 +270,7 @@ func createFasthttpClient(clientConfig *config) *fasthttp.Client {
 }
 
 // proxyTheRequest handles the request proxying logic.
-func proxyTheRequest(c *fiber.Ctx, currentEndpoint string) error {
+func proxyTheRequest(c fiber.Ctx, currentEndpoint string) error {
 	// Record request for RPS tracking
 	if rpsTracker := GetRPSTracker(); rpsTracker != nil {
 		rpsTracker.RecordRequest()
@@ -337,7 +337,7 @@ func proxyTheRequest(c *fiber.Ctx, currentEndpoint string) error {
 }
 
 // setupTracing extracts and sets up tracing context from request headers
-func setupTracing(c *fiber.Ctx) context.Context {
+func setupTracing(c fiber.Ctx) context.Context {
 	ctx := context.Background()
 
 	if !cfg.Tracing.Enable || tracer == nil {
@@ -361,7 +361,7 @@ func setupTracing(c *fiber.Ctx) context.Context {
 }
 
 // performProxyRequest executes the proxy request with retries, circuit breaker, and request coalescing
-func performProxyRequest(c *fiber.Ctx, proxyURL string) error {
+func performProxyRequest(c fiber.Ctx, proxyURL string) error {
 	// Extract user context for cache key (needed for coalescing and circuit breaker fallback)
 	userID, userRole := extractUserInfo(c)
 
@@ -420,7 +420,7 @@ func performProxyRequest(c *fiber.Ctx, proxyURL string) error {
 
 // performProxyRequestCore executes the proxy request with retries and circuit breaker
 // This is the core implementation used by both direct calls and coalesced requests
-func performProxyRequestCore(c *fiber.Ctx, proxyURL string, cacheKey string) error {
+func performProxyRequestCore(c fiber.Ctx, proxyURL string, cacheKey string) error {
 	// If circuit breaker is not enabled, use the original method
 	if !cfg.CircuitBreaker.Enable || cb == nil {
 		return performProxyRequestWithRetries(c, proxyURL)
@@ -471,7 +471,7 @@ func performProxyRequestCore(c *fiber.Ctx, proxyURL string, cacheKey string) err
 
 // performProxyRequestWithRetries executes the proxy request with retries
 // This is the original implementation extracted for reuse
-func performProxyRequestWithRetries(c *fiber.Ctx, proxyURL string) error {
+func performProxyRequestWithRetries(c fiber.Ctx, proxyURL string) error {
 	// Check backend health first if available
 	healthMgr := GetBackendHealthManager()
 	if healthMgr != nil && !healthMgr.IsHealthy() {
@@ -483,7 +483,7 @@ func performProxyRequestWithRetries(c *fiber.Ctx, proxyURL string) error {
 }
 
 // executeProxyAttempt performs a single proxy attempt with error handling
-func executeProxyAttempt(c *fiber.Ctx, proxyURL string) error {
+func executeProxyAttempt(c fiber.Ctx, proxyURL string) error {
 	// Additional safety check inside retry loop
 	if c == nil {
 		return retry.Unrecoverable(errFiberCtxNilDuringRetry)
@@ -552,7 +552,7 @@ func executeProxyAttempt(c *fiber.Ctx, proxyURL string) error {
 }
 
 // performProxyRequestWithEnhancedRetries executes the proxy request with intelligent retry strategy
-func performProxyRequestWithEnhancedRetries(c *fiber.Ctx, proxyURL string, backendUnhealthy bool) error {
+func performProxyRequestWithEnhancedRetries(c fiber.Ctx, proxyURL string, backendUnhealthy bool) error {
 	// Safety check for nil context
 	if c == nil {
 		return errFiberCtxNil
@@ -713,7 +713,7 @@ func notifyHealthManager(success bool) {
 }
 
 // handleCircuitOpenGracefulDegradation handles requests when the circuit breaker is open
-func handleCircuitOpenGracefulDegradation(c *fiber.Ctx, cacheKey string) error {
+func handleCircuitOpenGracefulDegradation(c fiber.Ctx, cacheKey string) error {
 	// Try to serve from cache if configured and available
 	if cfg.CircuitBreaker.ReturnCachedOnOpen {
 		if cachedResponse := libpack_cache.CacheLookup(cacheKey); cachedResponse != nil {
@@ -750,7 +750,7 @@ func handleCircuitOpenGracefulDegradation(c *fiber.Ctx, cacheKey string) error {
 }
 
 // doProxyRequestWithTimeout performs a proxy request with proper timeout handling
-func doProxyRequestWithTimeout(c *fiber.Ctx, proxyURL string, client *fasthttp.Client) error {
+func doProxyRequestWithTimeout(c fiber.Ctx, proxyURL string, client *fasthttp.Client) error {
 	// Calculate timeout from client configuration
 	clientTimeout := time.Duration(cfg.Client.ClientTimeout) * time.Second
 	if clientTimeout <= 0 {
@@ -785,7 +785,7 @@ func doProxyRequestWithTimeout(c *fiber.Ctx, proxyURL string, client *fasthttp.C
 }
 
 // handleGzippedResponse decompresses gzipped responses
-func handleGzippedResponse(c *fiber.Ctx) error {
+func handleGzippedResponse(c fiber.Ctx) error {
 	if !bytes.EqualFold(c.Response().Header.Peek("Content-Encoding"), []byte("gzip")) {
 		return nil
 	}
@@ -828,7 +828,7 @@ func handleGzippedResponse(c *fiber.Ctx) error {
 }
 
 // logDebugRequest logs the request details when in debug mode with sanitization.
-func logDebugRequest(c *fiber.Ctx) {
+func logDebugRequest(c fiber.Ctx) {
 	contentType := string(c.Request().Header.ContentType())
 	sanitizedBody := sanitizeForLogging(c.Body(), contentType)
 	sanitizedHeaders := sanitizeHeaders(convertHeaders(c.GetReqHeaders()))
@@ -845,7 +845,7 @@ func logDebugRequest(c *fiber.Ctx) {
 }
 
 // logDebugResponse logs the response details when in debug mode with sanitization.
-func logDebugResponse(c *fiber.Ctx) {
+func logDebugResponse(c fiber.Ctx) {
 	contentType := string(c.Response().Header.ContentType())
 	sanitizedBody := sanitizeForLogging(c.Response().Body(), contentType)
 	sanitizedHeaders := sanitizeHeaders(convertHeaders(c.GetRespHeaders()))

server.go

@@ -6,8 +6,8 @@ import (
 	"time"
 
 	"github.com/goccy/go-json"
-	fiber "github.com/gofiber/fiber/v2"
+	fiber "github.com/gofiber/fiber/v3"
-	"github.com/gofiber/fiber/v2/middleware/cors"
+	"github.com/gofiber/fiber/v3/middleware/cors"
 	"github.com/google/uuid"
 
 	graphql "github.com/lukaszraczylo/go-simple-graphql"
@@ -42,19 +42,18 @@ func StartHTTPProxy() error {
 	})
 
 	serverConfig := fiber.Config{
-		DisableStartupMessage: true,
+		AppName:      fmt.Sprintf("GraphQL Monitoring Proxy - %s v%s", libpack_config.PKG_NAME, libpack_config.PKG_VERSION),
-		AppName:               fmt.Sprintf("GraphQL Monitoring Proxy - %s v%s", libpack_config.PKG_NAME, libpack_config.PKG_VERSION),
+		IdleTimeout:  time.Duration(cfg.Client.ClientTimeout) * time.Second,
-		IdleTimeout:           time.Duration(cfg.Client.ClientTimeout) * time.Second,
+		ReadTimeout:  time.Duration(cfg.Client.ClientTimeout) * time.Second,
-		ReadTimeout:           time.Duration(cfg.Client.ClientTimeout) * time.Second,
+		WriteTimeout: time.Duration(cfg.Client.ClientTimeout) * time.Second,
-		WriteTimeout:          time.Duration(cfg.Client.ClientTimeout) * time.Second,
+		JSONEncoder:  json.Marshal,
-		JSONEncoder:           json.Marshal,
+		JSONDecoder:  json.Unmarshal,
-		JSONDecoder:           json.Unmarshal,
 	}
 
 	server := fiber.New(serverConfig)
 
 	server.Use(cors.New(cors.Config{
-		AllowOrigins: "*",
+		AllowOrigins: []string{"*"},
 	}))
 
 	server.Use(AddRequestUUID)
@@ -71,7 +70,7 @@ func StartHTTPProxy() error {
 
 	// WebSocket support - must be registered before catch-all routes
 	if cfg.WebSocket.Enable {
-		server.Get("/v1/graphql", func(c *fiber.Ctx) error {
+		server.Get("/v1/graphql", func(c fiber.Ctx) error {
 			if IsWebSocketRequest(c) {
 				wsp := GetWebSocketProxy()
 				if wsp != nil {
@@ -90,7 +89,7 @@ func StartHTTPProxy() error {
 		Pairs:   map[string]any{"port": cfg.Server.PortGraphQL},
 	})
 
-	if err := server.Listen(fmt.Sprintf(":%d", cfg.Server.PortGraphQL)); err != nil {
+	if err := server.Listen(fmt.Sprintf(":%d", cfg.Server.PortGraphQL), fiber.ListenConfig{DisableStartupMessage: true}); err != nil {
 		return fmt.Errorf("failed to start HTTP proxy server on port %d: %w",
 			cfg.Server.PortGraphQL, err)
 	}
@@ -99,18 +98,18 @@ func StartHTTPProxy() error {
 }
 
 // proxyTheRequestToDefault proxies the request to the default GraphQL endpoint.
-func proxyTheRequestToDefault(c *fiber.Ctx) error {
+func proxyTheRequestToDefault(c fiber.Ctx) error {
 	return proxyTheRequest(c, cfg.Server.HostGraphQL)
 }
 
 // AddRequestUUID adds a unique request UUID to the context.
-func AddRequestUUID(c *fiber.Ctx) error {
+func AddRequestUUID(c fiber.Ctx) error {
 	c.Locals("request_uuid", uuid.NewString())
 	return c.Next()
 }
 
 // checkAllowedURLs checks if the requested URL is allowed.
-func checkAllowedURLs(c *fiber.Ctx) bool {
+func checkAllowedURLs(c fiber.Ctx) bool {
 	if len(allowedUrls) == 0 {
 		return true
 	}
@@ -120,7 +119,7 @@ func checkAllowedURLs(c *fiber.Ctx) bool {
 }
 
 // healthCheck performs a comprehensive health check on the GraphQL server and its dependencies.
-func healthCheck(c *fiber.Ctx) error {
+func healthCheck(c fiber.Ctx) error {
 	// Prepare the response structure
 	response := HealthCheckResponse{
 		Status:       "healthy",
@@ -254,7 +253,7 @@ func healthCheck(c *fiber.Ctx) error {
 }
 
 // processGraphQLRequest handles the incoming GraphQL requests.
-func processGraphQLRequest(c *fiber.Ctx) error {
+func processGraphQLRequest(c fiber.Ctx) error {
 	startTime := time.Now()
 
 	// Extract user information and check permissions
@@ -305,7 +304,7 @@ func processGraphQLRequest(c *fiber.Ctx) error {
 }
 
 // extractUserInfo extracts user ID and role from request headers
-func extractUserInfo(c *fiber.Ctx) (string, string) {
+func extractUserInfo(c fiber.Ctx) (string, string) {
 	extractedUserID := "-"
 	extractedRoleName := "-"
 
@@ -326,7 +325,7 @@ func extractUserInfo(c *fiber.Ctx) (string, string) {
 }
 
 // handleCaching manages the caching logic for GraphQL requests
-func handleCaching(c *fiber.Ctx, parsedResult *parseGraphQLQueryResult, userID, userRole string) (bool, error) {
+func handleCaching(c fiber.Ctx, parsedResult *parseGraphQLQueryResult, userID, userRole string) (bool, error) {
 	// Calculate query hash for cache key - now includes user context for security
 	calculatedQueryHash := libpack_cache.CalculateHash(c, userID, userRole)
 
@@ -357,6 +356,13 @@ func handleCaching(c *fiber.Ctx, parsedResult *parseGraphQLQueryResult, userID,
 
 	// Try to get from cache
 	if cachedResponse := libpack_cache.CacheLookup(calculatedQueryHash); cachedResponse != nil {
+		// Count cache-served requests toward RPS too. Cache hits return here
+		// without reaching proxyTheRequest (where misses/proxied requests are
+		// recorded), so without this the dashboard's current RPS reads 0
+		// whenever traffic is served from cache.
+		if rpsTracker := GetRPSTracker(); rpsTracker != nil {
+			rpsTracker.RecordRequest()
+		}
 		cfg.Monitoring.Increment(libpack_monitoring.MetricsCacheHit, nil)
 		c.Set("X-Cache-Hit", "true")
 		c.Set("Content-Type", "application/json")
@@ -373,7 +379,7 @@ func handleCaching(c *fiber.Ctx, parsedResult *parseGraphQLQueryResult, userID,
 }
 
 // proxyAndCacheTheRequest proxies and caches the request if needed.
-func proxyAndCacheTheRequest(c *fiber.Ctx, queryCacheHash string, cacheTime int, currentEndpoint string) error {
+func proxyAndCacheTheRequest(c fiber.Ctx, queryCacheHash string, cacheTime int, currentEndpoint string) error {
 	if err := proxyTheRequest(c, currentEndpoint); err != nil {
 		cfg.Logger.Error(&libpack_logger.LogMessage{
 			Message: "Can't proxy the request",
@@ -389,7 +395,7 @@ func proxyAndCacheTheRequest(c *fiber.Ctx, queryCacheHash string, cacheTime int,
 }
 
 // logAndMonitorRequest logs and monitors the request processing.
-func logAndMonitorRequest(c *fiber.Ctx, userID, opType, opName string, wasCached bool, duration time.Duration, startTime time.Time) {
+func logAndMonitorRequest(c fiber.Ctx, userID, opType, opName string, wasCached bool, duration time.Duration, startTime time.Time) {
 	// Low-cardinality labels only: user_id and op_name dropped to prevent Prometheus explosion.
 	labels := map[string]string{
 		"op_type": opType,

server_handlers_test.go

@@ -10,7 +10,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v3"
 	libpack_cache "github.com/lukaszraczylo/graphql-monitoring-proxy/cache"
 	"github.com/valyala/fasthttp"
 )
@@ -20,11 +20,11 @@ import (
 // ---------------------------------------------------------------------------
 
 func TestAddRequestUUID_SetsLocalsAndCallsNext(t *testing.T) {
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	app.Use(AddRequestUUID)
 
 	var captured string
-	app.Get("/", func(c *fiber.Ctx) error {
+	app.Get("/", func(c fiber.Ctx) error {
 		if v, ok := c.Locals("request_uuid").(string); ok {
 			captured = v
 		}
@@ -32,7 +32,7 @@ func TestAddRequestUUID_SetsLocalsAndCallsNext(t *testing.T) {
 	})
 
 	req := httptest.NewRequest("GET", "/", nil)
-	resp, err := app.Test(req, -1)
+	resp, err := app.Test(req, fiber.TestConfig{Timeout: 0})
 	if err != nil {
 		t.Fatalf("app.Test: %v", err)
 	}
@@ -51,11 +51,11 @@ func TestAddRequestUUID_SetsLocalsAndCallsNext(t *testing.T) {
 }
 
 func TestAddRequestUUID_UniquePerRequest(t *testing.T) {
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	app.Use(AddRequestUUID)
 
 	seen := make([]string, 0, 5)
-	app.Get("/", func(c *fiber.Ctx) error {
+	app.Get("/", func(c fiber.Ctx) error {
 		if v, ok := c.Locals("request_uuid").(string); ok {
 			seen = append(seen, v)
 		}
@@ -64,7 +64,7 @@ func TestAddRequestUUID_UniquePerRequest(t *testing.T) {
 
 	for i := range 5 {
 		req := httptest.NewRequest("GET", "/", nil)
-		resp, err := app.Test(req, -1)
+		resp, err := app.Test(req, fiber.TestConfig{Timeout: 0})
 		if err != nil {
 			t.Fatalf("request %d: %v", i, err)
 		}
@@ -89,12 +89,12 @@ func TestHealthCheck_Returns200WithJSON(t *testing.T) {
 	parseConfig()
 	_ = StartMonitoringServer()
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	app.Get("/health", healthCheck)
 
 	// Pass check_graphql=false to avoid real network call
 	req := httptest.NewRequest("GET", "/health?check_graphql=false&check_redis=false", nil)
-	resp, err := app.Test(req, 10000)
+	resp, err := app.Test(req, fiber.TestConfig{Timeout: 10000 * time.Millisecond})
 	if err != nil {
 		t.Fatalf("app.Test: %v", err)
 	}
@@ -135,11 +135,11 @@ func TestHealthCheck_UnhealthyWhenGraphQLDown(t *testing.T) {
 		cfgMutex.Unlock()
 	}()
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	app.Get("/health", healthCheck)
 
 	req := httptest.NewRequest("GET", "/health?check_redis=false", nil)
-	resp, err := app.Test(req, 15000)
+	resp, err := app.Test(req, fiber.TestConfig{Timeout: 15000 * time.Millisecond})
 	if err != nil {
 		t.Fatalf("app.Test: %v", err)
 	}
@@ -190,14 +190,14 @@ func TestProcessGraphQLRequest_ValidBodyProxiesToBackend(t *testing.T) {
 		cfgMutex.Unlock()
 	}()
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	app.Post("/*", processGraphQLRequest)
 
 	body := `{"query":"query { __typename }"}`
 	req := httptest.NewRequest("POST", "/v1/graphql", strings.NewReader(body))
 	req.Header.Set("Content-Type", "application/json")
 
-	resp, err := app.Test(req, 10000)
+	resp, err := app.Test(req, fiber.TestConfig{Timeout: 10000 * time.Millisecond})
 	if err != nil {
 		t.Fatalf("app.Test: %v", err)
 	}
@@ -236,7 +236,7 @@ func TestProcessGraphQLRequest_MalformedBodyStillHandled(t *testing.T) {
 		cfgMutex.Unlock()
 	}()
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	app.Post("/*", processGraphQLRequest)
 
 	// Not valid JSON — proxy should still forward or return gracefully
@@ -244,7 +244,7 @@ func TestProcessGraphQLRequest_MalformedBodyStillHandled(t *testing.T) {
 	req := httptest.NewRequest("POST", "/v1/graphql", strings.NewReader(body))
 	req.Header.Set("Content-Type", "application/json")
 
-	resp, err := app.Test(req, 10000)
+	resp, err := app.Test(req, fiber.TestConfig{Timeout: 10000 * time.Millisecond})
 	if err != nil {
 		t.Fatalf("app.Test: %v", err)
 	}
@@ -302,7 +302,7 @@ func TestHandleCaching_CacheHitReturnsStoredResponse(t *testing.T) {
 		cfgMutex.Unlock()
 	}()
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	app.Post("/*", processGraphQLRequest)
 
 	queryBody := `{"query":"query { users { id } }"}`
@@ -310,7 +310,7 @@ func TestHandleCaching_CacheHitReturnsStoredResponse(t *testing.T) {
 	// First request — cache miss, hits backend
 	req1 := httptest.NewRequest("POST", "/v1/graphql", strings.NewReader(queryBody))
 	req1.Header.Set("Content-Type", "application/json")
-	resp1, err := app.Test(req1, 10000)
+	resp1, err := app.Test(req1, fiber.TestConfig{Timeout: 10000 * time.Millisecond})
 	if err != nil {
 		t.Fatalf("first request: %v", err)
 	}
@@ -323,7 +323,7 @@ func TestHandleCaching_CacheHitReturnsStoredResponse(t *testing.T) {
 	// Second identical request — should hit cache
 	req2 := httptest.NewRequest("POST", "/v1/graphql", strings.NewReader(queryBody))
 	req2.Header.Set("Content-Type", "application/json")
-	resp2, err := app.Test(req2, 10000)
+	resp2, err := app.Test(req2, fiber.TestConfig{Timeout: 10000 * time.Millisecond})
 	if err != nil {
 		t.Fatalf("second request: %v", err)
 	}
@@ -380,7 +380,7 @@ func TestHandleCaching_CacheMissProxiesRequest(t *testing.T) {
 		cfgMutex.Unlock()
 	}()
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 	app.Post("/*", processGraphQLRequest)
 
 	// Unique query so no prior cache entry
@@ -388,7 +388,7 @@ func TestHandleCaching_CacheMissProxiesRequest(t *testing.T) {
 	req := httptest.NewRequest("POST", "/v1/graphql", strings.NewReader(queryBody))
 	req.Header.Set("Content-Type", "application/json")
 
-	resp, err := app.Test(req, 10000)
+	resp, err := app.Test(req, fiber.TestConfig{Timeout: 10000 * time.Millisecond})
 	if err != nil {
 		t.Fatalf("app.Test: %v", err)
 	}
@@ -430,10 +430,10 @@ func TestHandleCaching_DirectCacheHitBranch(t *testing.T) {
 		cfgMutex.Unlock()
 	}()
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 
 	var wasCachedResult bool
-	app.Post("/test", func(c *fiber.Ctx) error {
+	app.Post("/test", func(c fiber.Ctx) error {
 		parsedResult := &parseGraphQLQueryResult{
 			cacheTime:      60,
 			cacheRequest:   true,
@@ -507,7 +507,7 @@ func TestHandleCaching_NoCacheEnabled_ProxiesDirect(t *testing.T) {
 		cfgMutex.Unlock()
 	}()
 
-	app := fiber.New(fiber.Config{DisableStartupMessage: true})
+	app := fiber.New()
 
 	reqCtx := &fasthttp.RequestCtx{}
 	reqCtx.Request.SetRequestURI("/v1/graphql")

websocket.go

@@ -9,8 +9,8 @@ import (
 	"time"
 
 	"github.com/goccy/go-json"
-	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/contrib/v3/websocket"
-	"github.com/gofiber/websocket/v2"
+	"github.com/gofiber/fiber/v3"
 	gorillaws "github.com/gorilla/websocket"
 	libpack_logger "github.com/lukaszraczylo/graphql-monitoring-proxy/logging"
 	libpack_monitoring "github.com/lukaszraczylo/graphql-monitoring-proxy/monitoring"
@@ -79,7 +79,7 @@ func NewWebSocketProxy(backendURL string, config WebSocketConfig, logger *libpac
 }
 
 // HandleWebSocket upgrades the connection and proxies WebSocket traffic
-func (wsp *WebSocketProxy) HandleWebSocket(c *fiber.Ctx) error {
+func (wsp *WebSocketProxy) HandleWebSocket(c fiber.Ctx) error {
 	if !wsp.enabled {
 		return fiber.NewError(fiber.StatusNotImplemented, "WebSocket support is disabled")
 	}
@@ -477,7 +477,7 @@ func (wsp *WebSocketProxy) GetStats() map[string]any {
 }
 
 // IsWebSocketRequest checks if the request is a WebSocket upgrade request
-func IsWebSocketRequest(c *fiber.Ctx) bool {
+func IsWebSocketRequest(c fiber.Ctx) bool {
 	return websocket.IsWebSocketUpgrade(c) ||
 		c.Get("Upgrade") == "websocket" ||
 		c.Get("Connection") == "Upgrade"