diff --git a/v3.1/Dockerfile b/v3.1/Dockerfile
new file mode 100644
index 0000000..297548b
--- /dev/null
+++ b/v3.1/Dockerfile
@@ -0,0 +1,4 @@
+FROM swr.cn-east-3.myhuaweicloud.com/turingsyn/alpine:3.21.3
+ADD jenkins-cron /app/
+RUN chmod +x /app/jenkins-cron
+WORKDIR /app
diff --git a/v3.1/clean.go b/v3.1/clean.go
new file mode 100644
index 0000000..54a8fb7
--- /dev/null
+++ b/v3.1/clean.go
@@ -0,0 +1,276 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"runtime"
+	"sync"
+	"sync/atomic"
+	"time"
+)
+
+// RemoveStats tracks statistics about the file removal process
+type RemoveStats struct {
+	Total   int64      // Total number of files/directories processed
+	Success int64      // Number of successfully removed files/directories
+	Failed  int64      // Number of files/directories that failed to be removed
+	Errors  []error    // Collection of errors encountered during removal
+	mu      sync.Mutex // Mutex to protect concurrent access to Errors slice
+}
+
+// RemoveOptions configures the file removal process
+type RemoveOptions struct {
+	Workers  int                              // Number of concurrent workers (defaults to CPU count)
+	Logger   func(format string, args ...any) // Logger function
+	Retries  int                              // Number of retries for failed removals
+	Stats    *RemoveStats                     // Statistics collector (optional)
+	Progress func(current int64)              // Progress callback function (optional)
+}
+
+// removeResult represents the result of a single file/directory removal operation
+type removeResult struct {
+	Path string // Path that was processed
+	Err  error  // Error if removal failed, nil if successful
+}
+
+// Remove recursively removes a directory and all its contents with concurrency support
+func Remove(ctx context.Context, path string, opts RemoveOptions) error {
+	// Apply default options if not specified
+	if opts.Workers <= 0 {
+		opts.Workers = runtime.NumCPU()
+	}
+	if opts.Logger == nil {
+		opts.Logger = log.Printf
+	}
+	if opts.Retries < 0 {
+		opts.Retries = 0
+	}
+	if opts.Stats == nil {
+		opts.Stats = &RemoveStats{}
+	}
+
+	// Validate path
+	if path == "" {
+		return fmt.Errorf("empty path provided")
+	}
+
+	// Safety check: prevent removal of critical directories
+	absPath, err := filepath.Abs(path)
+	if err == nil {
+		// List of critical paths that should never be removed
+		criticalPaths := []string{
+			"/", "/bin", "/boot", "/dev", "/etc", "/home", "/lib", "/lib64",
+			"/media", "/mnt", "/opt", "/proc", "/root", "/run", "/sbin",
+			"/srv", "/sys", "/tmp", "/usr", "/var",
+			"C:\\", "C:\\Windows", "C:\\Program Files", "C:\\Program Files (x86)",
+			"C:\\Users",
+		}
+
+		for _, critical := range criticalPaths {
+			if absPath == critical {
+				return fmt.Errorf("refusing to remove critical system directory: %s", absPath)
+			}
+		}
+	}
+
+	// Check if path exists
+	info, err := os.Stat(path)
+	if os.IsNotExist(err) {
+		opts.Logger("[CLEAN] Path does not exist, skipping: %s", path)
+		return nil
+	}
+	if err != nil {
+		return fmt.Errorf("failed to access path %s: %w", path, err)
+	}
+
+	// Check if it's a directory
+	if !info.IsDir() {
+		opts.Logger("[CLEAN] Path is not a directory, removing file: %s", path)
+		if err := os.Remove(path); err != nil {
+			return fmt.Errorf("failed to remove file %s: %w", path, err)
+		}
+		if opts.Stats != nil {
+			atomic.AddInt64(&opts.Stats.Total, 1)
+			atomic.AddInt64(&opts.Stats.Success, 1)
+		}
+		return nil
+	}
+
+	opts.Logger("[CLEAN] Starting removal of directory: %s with %d workers", path, opts.Workers)
+
+	// Create channels for work distribution and result collection
+	workChan := make(chan string, opts.Workers*2)
+	resultChan := make(chan removeResult, opts.Workers*2)
+
+	// Start worker goroutines
+	var wg sync.WaitGroup
+	for i := 0; i < opts.Workers; i++ {
+		wg.Add(1)
+		go removeWorker(ctx, &wg, workChan, resultChan, opts)
+	}
+
+	// Start directory traversal
+	go func() {
+		defer close(workChan)
+		if err := walkDir(ctx, path, workChan, opts); err != nil {
+			opts.Logger("[CLEAN] Error walking directory %s: %v", path, err)
+		}
+	}()
+
+	// Wait for workers to finish and close result channel
+	go func() {
+		wg.Wait()
+		close(resultChan)
+	}()
+
+	// Process results
+	var firstErr error
+	for res := range resultChan {
+		atomic.AddInt64(&opts.Stats.Total, 1)
+		if res.Err != nil {
+			atomic.AddInt64(&opts.Stats.Failed, 1)
+			opts.Stats.mu.Lock()
+			opts.Stats.Errors = append(opts.Stats.Errors, res.Err)
+			opts.Stats.mu.Unlock()
+			if firstErr == nil {
+				firstErr = res.Err
+			}
+		} else {
+			atomic.AddInt64(&opts.Stats.Success, 1)
+		}
+		if opts.Progress != nil {
+			opts.Progress(atomic.LoadInt64(&opts.Stats.Total))
+		}
+	}
+
+	// Try to remove the root directory itself
+	if err := tryRemoveRoot(ctx, path, opts); err != nil && firstErr == nil {
+		firstErr = err
+		atomic.AddInt64(&opts.Stats.Failed, 1)
+		opts.Stats.mu.Lock()
+		opts.Stats.Errors = append(opts.Stats.Errors, err)
+		opts.Stats.mu.Unlock()
+	}
+
+	opts.Logger("[CLEAN] Completed removal of %s: Total=%d Success=%d Failed=%d",
+		path, opts.Stats.Total, opts.Stats.Success, opts.Stats.Failed)
+
+	return firstErr
+}
+
+// walkDir traverses the directory tree and sends paths to the work channel
+// Uses depth-first, reverse order to ensure children are processed before parents
+func walkDir(ctx context.Context, root string, workChan chan<- string, opts RemoveOptions) error {
+	var paths []string
+
+	// Walk the directory tree and collect all paths
+	err := filepath.WalkDir(root, func(subPath string, d os.DirEntry, err error) error {
+		// Check for context cancellation
+		if ctx.Err() != nil {
+			return ctx.Err()
+		}
+
+		// Handle walk errors
+		if err != nil {
+			opts.Logger("[CLEAN] Walk error on %s: %v", subPath, err)
+			return nil // Skip errors and continue
+		}
+
+		// Skip the root directory itself
+		if subPath != root {
+			paths = append(paths, subPath)
+		}
+		return nil
+	})
+
+	// Process paths in reverse order (depth-first)
+	for i := len(paths) - 1; i >= 0; i-- {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		case workChan <- paths[i]:
+			// Path sent to worker
+		}
+	}
+
+	return err
+}
+
+// removeWorker processes paths from the work channel and removes them
+func removeWorker(ctx context.Context, wg *sync.WaitGroup, workChan <-chan string, resultChan chan<- removeResult, opts RemoveOptions) {
+	defer wg.Done()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case subPath, ok := <-workChan:
+			if !ok {
+				return // Channel closed, exit worker
+			}
+
+			// Try to remove with retries
+			var err error
+			for i := 0; i <= opts.Retries; i++ {
+				// Check if context is cancelled before each attempt
+				if ctx.Err() != nil {
+					resultChan <- removeResult{Path: subPath, Err: ctx.Err()}
+					return
+				}
+
+				err = os.RemoveAll(subPath)
+				if err == nil {
+					break // Successful removal
+				}
+
+				// If not the last retry, wait before trying again
+				if i < opts.Retries {
+					// Exponential backoff: 100ms, 200ms, 400ms, ...
+					backoff := time.Duration(100*(1<<i)) * time.Millisecond
+					select {
+					case <-ctx.Done():
+						resultChan <- removeResult{Path: subPath, Err: ctx.Err()}
+						return
+					case <-time.After(backoff):
+						// Continue with retry
+					}
+				}
+			}
+
+			// Send result
+			if err != nil {
+				opts.Logger("[CLEAN] Failed to remove %s: %v", subPath, err)
+				resultChan <- removeResult{Path: subPath, Err: fmt.Errorf("remove %q: %w", subPath, err)}
+			} else {
+				if opts.Logger != nil {
+					opts.Logger("[CLEAN] Removed: %s", subPath)
+				}
+				resultChan <- removeResult{Path: subPath, Err: nil}
+			}
+		}
+	}
+}
+
+// tryRemoveRoot attempts to remove the root directory itself
+func tryRemoveRoot(ctx context.Context, path string, opts RemoveOptions) error {
+	// Check for context cancellation
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	default:
+		// Continue
+	}
+
+	// Try to remove the directory
+	if err := os.Remove(path); err != nil {
+		// It's common for this to fail if the directory wasn't empty
+		opts.Logger("[CLEAN] Note: Could not remove root directory %s: %v", path, err)
+		return fmt.Errorf("remove root directory %q: %w", path, err)
+	}
+
+	opts.Logger("[CLEAN] Successfully removed root directory: %s", path)
+	return nil
+}
diff --git a/v3.1/config.go b/v3.1/config.go
new file mode 100644
index 0000000..f79cbc4
--- /dev/null
+++ b/v3.1/config.go
@@ -0,0 +1,114 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/go-playground/validator/v10"
+	"github.com/spf13/viper"
+)
+
+// Gradle configuration structure
+type Gradle struct {
+	Caches []string `mapstructure:"caches" validate:"required,min=1"`
+}
+
+// Jenkins configuration structure
+type Jenkins struct {
+	Schema            string                   `mapstructure:"schema" validate:"required,oneof=http https"`
+	URL               string                   `mapstructure:"url" validate:"required"`
+	User              string                   `mapstructure:"user" validate:"required"`
+	Token             string                   `mapstructure:"token" validate:"required"`
+	Number            string                   `mapstructure:"number" validate:"required"`
+	DefaultParameters []map[string]interface{} `mapstructure:"default_parameters"`
+	SpecialParameters []map[string]interface{} `mapstructure:"special_parameters"`
+}
+
+// Config represents the application configuration
+type Config struct {
+	Gradle  Gradle
+	Jenkins Jenkins
+	Jobs    []string `mapstructure:"jobs" validate:"required,min=1"`
+	Retries int      `mapstructure:"retries" validate:"min=0"`
+}
+
+// DefaultConfig returns a configuration with default values
+func DefaultConfig() *Config {
+	return &Config{
+		Gradle: Gradle{
+			Caches: []string{"/home/caches"},
+		},
+		Jenkins: Jenkins{
+			Schema: "https",
+			Number: "lastBuild",
+			DefaultParameters: []map[string]interface{}{
+				{"only_build": true},
+			},
+			SpecialParameters: []map[string]interface{}{},
+		},
+		Retries: 2,
+	}
+}
+
+// ValidateConfig validates the configuration
+func ValidateConfig(config *Config) error {
+	validate := validator.New()
+	if err := validate.Struct(config); err != nil {
+		return err
+	}
+
+	// Additional validation logic
+	if !strings.HasSuffix(config.Jenkins.URL, "/") {
+		config.Jenkins.URL += "/"
+	}
+
+	return nil
+}
+
+// LoadConfig loads configuration from the specified path
+func LoadConfig(path string) (*Config, error) {
+	v := viper.New()
+	v.SetConfigName("config")
+	v.SetConfigType("yaml")
+	v.AddConfigPath(path)
+
+	// Also check current directory and /etc as fallbacks
+	v.AddConfigPath(".")
+	v.AddConfigPath("/etc")
+
+	// Set environment variables prefix
+	v.SetEnvPrefix("JENKINS_CRON")
+	v.AutomaticEnv()
+
+	// Load default config
+	config := DefaultConfig()
+
+	// Read config file
+	if err := v.ReadInConfig(); err != nil {
+		log.Printf("[CONFIG] Warning: Error reading config file: %v", err)
+		log.Printf("[CONFIG] Using default configuration with environment variable overrides")
+	}
+
+	// Unmarshal config
+	if err := v.Unmarshal(config); err != nil {
+		return nil, fmt.Errorf("unable to decode config into struct: %w", err)
+	}
+
+	// Validate config
+	if err := ValidateConfig(config); err != nil {
+		return nil, fmt.Errorf("invalid configuration: %w", err)
+	}
+
+	return config, nil
+}
+
+// GetConfigPath returns the configuration path, either from command line or default
+func GetConfigPath() string {
+	// Check if path is provided as argument
+	if len(os.Args) > 1 {
+		return os.Args[1]
+	}
+	return "/app"
+}
diff --git a/v3.1/config.yaml b/v3.1/config.yaml
new file mode 100644
index 0000000..17c2e29
--- /dev/null
+++ b/v3.1/config.yaml
@@ -0,0 +1,18 @@
+gradle:
+  caches:
+    - /home/caches
+
+jenkins:
+  schema: https
+  url: jenkins-ops.shasoapp.com
+  user: admin
+  token: 1234567890
+  number: lastBuild
+  default_parameters:
+    - only_build: true
+  special_parameters: []
+
+retries: 2
+jobs:
+  - echo-rework
+
diff --git a/v3.1/go.mod b/v3.1/go.mod
new file mode 100644
index 0000000..b463902
--- /dev/null
+++ b/v3.1/go.mod
@@ -0,0 +1,28 @@
+module jenkins-cron
+
+go 1.21.1
+
+require (
+	github.com/fsnotify/fsnotify v1.8.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.8 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.26.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.2.1 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.3 // indirect
+	github.com/sagikazarmark/locafero v0.7.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.12.0 // indirect
+	github.com/spf13/cast v1.7.1 // indirect
+	github.com/spf13/pflag v1.0.6 // indirect
+	github.com/spf13/viper v1.20.1 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/crypto v0.33.0 // indirect
+	golang.org/x/net v0.34.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
+	golang.org/x/text v0.22.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
diff --git a/v3.1/go.sum b/v3.1/go.sum
new file mode 100644
index 0000000..39ac219
--- /dev/null
+++ b/v3.1/go.sum
@@ -0,0 +1,54 @@
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+github.com/fsnotify/fsnotify v1.8.0 h1:dAwr6QBTBZIkG8roQaJjGof0pp0EeF+tNV7YBP3F/8M=
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+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
+golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/v3.1/jenkins.go b/v3.1/jenkins.go
new file mode 100644
index 0000000..8f99167
--- /dev/null
+++ b/v3.1/jenkins.go
@@ -0,0 +1,299 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"net/url"
+	"path"
+	"strings"
+	"sync"
+	"time"
+)
+
+// Build represents a Jenkins build
+type Build struct {
+	Actions []Action `json:"actions"`
+	Number  int      `json:"number"`
+	URL     string   `json:"url"`
+}
+
+// Action represents a Jenkins build action
+type Action struct {
+	Class      string      `json:"_class"`
+	Parameters []Parameter `json:"parameters,omitempty"`
+}
+
+// Parameter represents a Jenkins build parameter
+type Parameter struct {
+	Name  string      `json:"name"`
+	Value interface{} `json:"value"`
+}
+
+// JenkinsClient is a client for interacting with Jenkins API
+type JenkinsClient struct {
+	Client    *http.Client
+	Config    *Jenkins
+	semaphore chan struct{} // For concurrency control
+	mu        sync.Mutex    // For thread safety
+}
+
+// JenkinsService defines the interface for Jenkins operations
+type JenkinsService interface {
+	FetchBuild(ctx context.Context, job string) (*Build, error)
+	TriggerBuild(ctx context.Context, build *Build, params map[string]interface{}) error
+	FetchBuildWithRetry(ctx context.Context, job string, retries int) (*Build, error)
+	TriggerBuildWithRetry(ctx context.Context, build *Build, params map[string]interface{}, retries int) error
+}
+
+// NewJenkinsClient creates a new Jenkins client
+func NewJenkinsClient(cfg *Jenkins) *JenkinsClient {
+	// Configure HTTP client with reasonable defaults
+	transport := &http.Transport{
+		MaxIdleConns:        10,
+		IdleConnTimeout:     30 * time.Second,
+		DisableCompression:  false,
+		TLSHandshakeTimeout: 5 * time.Second,
+	}
+
+	return &JenkinsClient{
+		Client: &http.Client{
+			Timeout:   15 * time.Second, // Increased from 10s to 15s
+			Transport: transport,
+		},
+		Config:    cfg,
+		semaphore: make(chan struct{}, 5), // Limit to 5 concurrent requests
+	}
+}
+
+// buildAPIURL constructs the Jenkins API URL for a job
+func (c *JenkinsClient) buildAPIURL(job string) string {
+	return fmt.Sprintf("%s://%s/job/%s/%s/api/json",
+		c.Config.Schema,
+		c.Config.URL,
+		job,
+		c.Config.Number,
+	)
+}
+
+// FetchBuild retrieves build information from Jenkins
+func (c *JenkinsClient) FetchBuild(ctx context.Context, job string) (*Build, error) {
+	// Acquire semaphore
+	select {
+	case c.semaphore <- struct{}{}:
+		defer func() { <-c.semaphore }()
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	}
+
+	api := c.buildAPIURL(job)
+	log.Printf("[JENKINS] Fetching build info for job: %s from %s", job, api)
+
+	req, err := http.NewRequestWithContext(ctx, "GET", api, nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create GET request for job %s: %w", job, err)
+	}
+	req.SetBasicAuth(c.Config.User, c.Config.Token)
+	req.Header.Set("Accept", "application/json")
+
+	resp, err := c.Client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("request failed for job %s: %w", job, err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		bodyBytes, _ := io.ReadAll(io.LimitReader(resp.Body, 1000))
+		return nil, fmt.Errorf("unexpected status %s for job %s: %s", resp.Status, job, string(bodyBytes))
+	}
+
+	// Limit response body to 1MB to prevent memory issues
+	body, err := io.ReadAll(io.LimitReader(resp.Body, 1<<20))
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response body for job %s: %w", job, err)
+	}
+
+	var build Build
+	if err := json.Unmarshal(body, &build); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal response for job %s: %w", job, err)
+	}
+
+	log.Printf("[JENKINS] Successfully fetched build #%d for job: %s", build.Number, job)
+	return &build, nil
+}
+
+// FetchBuildWithRetry attempts to fetch a build with retries
+func (c *JenkinsClient) FetchBuildWithRetry(ctx context.Context, job string, retries int) (*Build, error) {
+	var lastErr error
+	for attempt := 0; attempt <= retries; attempt++ {
+		if attempt > 0 {
+			log.Printf("[JENKINS] Retry attempt %d/%d for fetching job: %s", attempt, retries, job)
+			// Exponential backoff: 1s, 2s, 4s, ...
+			backoffDuration := time.Duration(1<<uint(attempt-1)) * time.Second
+			select {
+			case <-time.After(backoffDuration):
+			case <-ctx.Done():
+				return nil, ctx.Err()
+			}
+		}
+
+		build, err := c.FetchBuild(ctx, job)
+		if err == nil {
+			return build, nil
+		}
+		lastErr = err
+		log.Printf("[JENKINS] Attempt %d failed: %v", attempt, err)
+	}
+	return nil, fmt.Errorf("failed to fetch build after %d retries: %w", retries, lastErr)
+}
+
+// ExtractBuildParams extracts build parameters as map[string]string
+func ExtractBuildParams(build *Build) map[string]string {
+	params := make(map[string]string)
+	for _, action := range build.Actions {
+		if action.Class == "hudson.model.ParametersAction" {
+			for _, param := range action.Parameters {
+				params[param.Name] = fmt.Sprintf("%v", param.Value)
+			}
+		}
+	}
+	return params
+}
+
+// MergeParams merges base parameters with default parameters
+func MergeParams(base map[string]string, defaults []map[string]interface{}) map[string]string {
+	result := make(map[string]string)
+	// Copy base parameters first
+	for k, v := range base {
+		result[k] = v
+	}
+	// Apply defaults, potentially overriding base values
+	for _, param := range defaults {
+		for k, v := range param {
+			result[k] = fmt.Sprintf("%v", v)
+		}
+	}
+	return result
+}
+
+// StringMapToInterfaceMap converts map[string]string to map[string]interface{}
+func StringMapToInterfaceMap(m map[string]string) map[string]interface{} {
+	res := make(map[string]interface{})
+	for k, v := range m {
+		res[k] = v
+	}
+	return res
+}
+
+// IsSubset checks if b is a subset of a
+func IsSubset(a map[string]string, b map[string]interface{}) bool {
+	for k, v := range b {
+		if a[k] != fmt.Sprintf("%v", v) {
+			return false
+		}
+	}
+	return true
+}
+
+// generateBuildURL constructs the URL for triggering a build with parameters
+func (c *JenkinsClient) generateBuildURL(baseURL string, mergedParams map[string]string) string {
+	values := url.Values{}
+
+	for k, v := range mergedParams {
+		values.Set(k, v)
+	}
+
+	// Parse and modify the build URL
+	u, err := url.Parse(baseURL)
+	if err != nil {
+		log.Printf("[JENKINS] Failed to parse build URL: %v", err)
+		return ""
+	}
+
+	u.Path = getBuildWithParametersPath(u.Path)
+	u.RawQuery = values.Encode()
+	return u.String()
+}
+
+// getBuildWithParametersPath modifies the path to use buildWithParameters endpoint
+func getBuildWithParametersPath(p string) string {
+	parts := strings.Split(strings.TrimSuffix(p, "/"), "/")
+	if len(parts) > 0 {
+		return path.Join(parts[:len(parts)-1]...) + "/buildWithParameters"
+	}
+	return p
+}
+
+// TriggerBuild triggers a Jenkins build with the given parameters
+func (c *JenkinsClient) TriggerBuild(ctx context.Context, build *Build, params map[string]interface{}) error {
+	// Acquire semaphore
+	select {
+	case c.semaphore <- struct{}{}:
+		defer func() { <-c.semaphore }()
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+
+	// Thread safety for params manipulation
+	c.mu.Lock()
+	merged := make(map[string]string)
+	for k, v := range params {
+		merged[k] = fmt.Sprintf("%v", v)
+	}
+	c.mu.Unlock()
+
+	triggerURL := c.generateBuildURL(build.URL, merged)
+	if triggerURL == "" {
+		return fmt.Errorf("failed to generate trigger URL")
+	}
+
+	log.Printf("[JENKINS] Triggering build at URL: %s", triggerURL)
+	req, err := http.NewRequestWithContext(ctx, "POST", triggerURL, nil)
+	if err != nil {
+		return fmt.Errorf("failed to create POST request: %w", err)
+	}
+	req.SetBasicAuth(c.Config.User, c.Config.Token)
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+
+	resp, err := c.Client.Do(req)
+	if err != nil {
+		return fmt.Errorf("trigger request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode >= 400 {
+		bodyBytes, _ := io.ReadAll(io.LimitReader(resp.Body, 1000))
+		return fmt.Errorf("trigger failed with status %s: %s", resp.Status, string(bodyBytes))
+	}
+
+	log.Printf("[JENKINS] Successfully triggered build: %s", resp.Status)
+	return nil
+}
+
+// TriggerBuildWithRetry attempts to trigger a build with retries
+func (c *JenkinsClient) TriggerBuildWithRetry(ctx context.Context, build *Build, params map[string]interface{}, retries int) error {
+	var lastErr error
+	for attempt := 0; attempt <= retries; attempt++ {
+		if attempt > 0 {
+			log.Printf("[JENKINS] Retry attempt %d/%d for triggering build", attempt, retries)
+			// Exponential backoff: 1s, 2s, 4s, ...
+			backoffDuration := time.Duration(1<<uint(attempt-1)) * time.Second
+			select {
+			case <-time.After(backoffDuration):
+			case <-ctx.Done():
+				return ctx.Err()
+			}
+		}
+
+		err := c.TriggerBuild(ctx, build, params)
+		if err == nil {
+			return nil
+		}
+		lastErr = err
+		log.Printf("[JENKINS] Attempt %d failed: %v", attempt, err)
+	}
+	return fmt.Errorf("failed to trigger build after %d retries: %w", retries, lastErr)
+}
diff --git a/v3.1/main.go b/v3.1/main.go
new file mode 100644
index 0000000..3433dcb
--- /dev/null
+++ b/v3.1/main.go
@@ -0,0 +1,221 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"sync"
+	"syscall"
+	"time"
+)
+
+// Version information
+var (
+	Version   = "v3.1.0"
+	BuildTime = "unknown"
+	GitCommit = "unknown"
+)
+
+func main() {
+	// Print version information
+	log.Printf("[MAIN] Jenkins-Cron %s (built: %s, commit: %s)", Version, BuildTime, GitCommit)
+
+	// Get configuration path
+	configPath := GetConfigPath()
+	log.Printf("[MAIN] Loading configuration from: %s", configPath)
+
+	// Load configuration with proper error handling
+	cfg, err := LoadConfig(configPath)
+	if err != nil {
+		log.Fatalf("[MAIN] Failed to load configuration: %v", err)
+	}
+
+	// Validate configuration
+	if len(cfg.Jobs) == 0 {
+		log.Fatalf("[MAIN] No jobs configured")
+	}
+	if cfg.Jenkins.URL == "" {
+		log.Fatalf("[MAIN] No Jenkins URL configured")
+	}
+
+	// Create a cancelable context
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	// Setup signal handling for graceful shutdown
+	setupSignalHandler(cancel)
+
+	// Clean Gradle caches
+	if err := cleanGradleCaches(ctx, cfg); err != nil {
+		log.Printf("[MAIN] Warning: Error cleaning Gradle caches: %v", err)
+	}
+
+	// Create Jenkins client
+	var jenkinsSvc JenkinsService = NewJenkinsClient(&cfg.Jenkins)
+
+	// Trigger Jenkins jobs
+	if err := triggerJobs(ctx, jenkinsSvc, cfg); err != nil {
+		log.Printf("[MAIN] Error triggering jobs: %v", err)
+		os.Exit(1)
+	}
+
+	log.Printf("[MAIN] All operations completed successfully")
+}
+
+// setupSignalHandler sets up handling of OS signals for graceful shutdown
+func setupSignalHandler(cancel context.CancelFunc) {
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+
+	go func() {
+		sig := <-c
+		log.Printf("[MAIN] Received signal %v, shutting down gracefully", sig)
+		cancel()
+
+		// Force exit after 5 seconds if graceful shutdown is taking too long
+		time.Sleep(5 * time.Second)
+		log.Printf("[MAIN] Forced shutdown after timeout")
+		os.Exit(1)
+	}()
+}
+
+// cleanGradleCaches cleans Gradle caches in parallel
+func cleanGradleCaches(ctx context.Context, cfg *Config) error {
+	if len(cfg.Gradle.Caches) == 0 {
+		log.Printf("[MAIN] No Gradle caches configured, skipping cleanup")
+		return nil
+	}
+
+	log.Printf("[MAIN] Starting Gradle cache cleanup")
+	stats := &RemoveStats{}
+
+	var wg sync.WaitGroup
+	var errs []error
+	var mu sync.Mutex
+
+	for _, cache := range cfg.Gradle.Caches {
+		wg.Add(1)
+		go func(cachePath string) {
+			defer wg.Done()
+
+			log.Printf("[MAIN] Cleaning cache: %s", cachePath)
+			err := Remove(ctx, cachePath, RemoveOptions{
+				Workers: 4,
+				Retries: 3,
+				Stats:   stats,
+				Logger:  log.Printf,
+				Progress: func(current int64) {
+					if current > 0 && current%100 == 0 {
+						log.Printf("[MAIN] Removed %d files from %s", current, cachePath)
+					}
+				},
+			})
+
+			if err != nil {
+				log.Printf("[MAIN] Error removing cache %s: %v", cachePath, err)
+				mu.Lock()
+				errs = append(errs, fmt.Errorf("cache %s: %w", cachePath, err))
+				mu.Unlock()
+			}
+		}(cache)
+	}
+
+	wg.Wait()
+	log.Printf("[MAIN] Cache cleanup summary: Total=%d Success=%d Failed=%d",
+		stats.Total, stats.Success, stats.Failed)
+
+	if len(errs) > 0 {
+		return fmt.Errorf("encountered %d errors during cache cleanup", len(errs))
+	}
+	return nil
+}
+
+// triggerJobs triggers all configured Jenkins jobs
+func triggerJobs(ctx context.Context, js JenkinsService, cfg *Config) error {
+	log.Printf("[MAIN] Starting to trigger %d Jenkins jobs", len(cfg.Jobs))
+
+	var wg sync.WaitGroup
+	errChan := make(chan error, len(cfg.Jobs))
+
+	// Create a timeout context for the entire operation
+	ctx, cancel := context.WithTimeout(ctx, 5*time.Minute)
+	defer cancel()
+
+	for _, job := range cfg.Jobs {
+		wg.Add(1)
+		go func(jobName string) {
+			defer wg.Done()
+
+			if err := processJob(ctx, js, cfg, jobName); err != nil {
+				log.Printf("[MAIN] Error processing job %s: %v", jobName, err)
+				errChan <- fmt.Errorf("job %s: %w", jobName, err)
+			}
+		}(job)
+	}
+
+	// Wait for all jobs to complete
+	wg.Wait()
+	close(errChan)
+
+	// Collect errors
+	var errs []error
+	for err := range errChan {
+		errs = append(errs, err)
+	}
+
+	if len(errs) > 0 {
+		return fmt.Errorf("encountered %d errors while triggering jobs", len(errs))
+	}
+	return nil
+}
+
+// processJob handles the processing of a single Jenkins job
+func processJob(ctx context.Context, js JenkinsService, cfg *Config, job string) error {
+	log.Printf("[MAIN] Processing job: %s", job)
+
+	// Fetch build with retry
+	build, err := js.FetchBuildWithRetry(ctx, job, cfg.Retries)
+	if err != nil {
+		return fmt.Errorf("failed to fetch build: %w", err)
+	}
+
+	log.Printf("[MAIN] Successfully fetched build #%d for job: %s", build.Number, job)
+
+	// Extract and merge parameters
+	latestParams := ExtractBuildParams(build)
+	merged := MergeParams(latestParams, cfg.Jenkins.DefaultParameters)
+
+	// Trigger build with default parameters
+	log.Printf("[MAIN] Triggering build with default parameters for job: %s", job)
+	if err := js.TriggerBuildWithRetry(ctx, build, StringMapToInterfaceMap(merged), cfg.Retries); err != nil {
+		log.Printf("[MAIN] Failed to trigger build with default parameters for job %s: %v", job, err)
+		// Continue with special parameters even if default build fails
+	}
+
+	// Process special parameters
+	for _, special := range cfg.Jenkins.SpecialParameters {
+		if IsSubset(latestParams, special) {
+			log.Printf("[MAIN] Skipping special parameters build (subset of latest) for %s: %+v", job, special)
+			continue
+		}
+
+		log.Printf("[MAIN] Triggering build with special parameters for job %s: %+v", job, special)
+		specialLatestParams := make(map[string]string)
+		for k, v := range latestParams {
+			specialLatestParams[k] = v
+		}
+		for k, v := range special {
+			specialLatestParams[k] = fmt.Sprintf("%v", v)
+		}
+
+		speciaMerged := MergeParams(specialLatestParams, cfg.Jenkins.DefaultParameters)
+		if err := js.TriggerBuildWithRetry(ctx, build, StringMapToInterfaceMap(speciaMerged), cfg.Retries); err != nil {
+			log.Printf("[MAIN] Failed to trigger build with special parameters for job %s: %v", job, err)
+			// Continue with other special parameters even if one fails
+		}
+	}
+
+	return nil
+}