feat: update go to 1.25, add permissions and envs (#49)

* chore(ci): update go to 1.25, add permissions and envs
* fix(ci): update pr-lint.yml
* chore: update go, fix linting
* fix: tests and linting
* fix(lint): lint fixes, renovate should now pass
* fix: updates, security upgrades
* chore: workflow updates, lint
* fix: more lint, checkmake, and other fixes
* fix: more lint, convert scripts to POSIX compliant
* fix: simplify codeql workflow
* tests: increase test coverage, fix found issues
* fix(lint): editorconfig checking, add to linters
* fix(lint): shellcheck, add to linters
* fix(lint): apply cr comment suggestions
* fix(ci): remove step-security/harden-runner
* fix(lint): remove duplication, apply cr fixes
* fix(ci): tests in CI/CD pipeline
* chore(lint): deduplication of strings
* fix(lint): apply cr comment suggestions
* fix(ci): actionlint
* fix(lint): apply cr comment suggestions
* chore: lint, add deps management

config/validation.go

@@ -6,240 +6,532 @@ import (
 
 	"github.com/spf13/viper"
 
-	"github.com/ivuorinen/gibidify/utils"
+	"github.com/ivuorinen/gibidify/gibidiutils"
 )
 
-// ValidateConfig validates the loaded configuration.
-func ValidateConfig() error {
-	var validationErrors []string
-
-	// Validate file size limit
+// validateFileSizeLimit validates the file size limit configuration.
+func validateFileSizeLimit() []string {
+	var errors []string
 	fileSizeLimit := viper.GetInt64("fileSizeLimit")
 	if fileSizeLimit < MinFileSizeLimit {
-		validationErrors = append(validationErrors, fmt.Sprintf("fileSizeLimit (%d) is below minimum (%d)", fileSizeLimit, MinFileSizeLimit))
+		errors = append(
+			errors,
+			fmt.Sprintf("fileSizeLimit (%d) is below minimum (%d)", fileSizeLimit, MinFileSizeLimit),
+		)
 	}
 	if fileSizeLimit > MaxFileSizeLimit {
-		validationErrors = append(validationErrors, fmt.Sprintf("fileSizeLimit (%d) exceeds maximum (%d)", fileSizeLimit, MaxFileSizeLimit))
+		errors = append(
+			errors,
+			fmt.Sprintf("fileSizeLimit (%d) exceeds maximum (%d)", fileSizeLimit, MaxFileSizeLimit),
+		)
 	}
+	return errors
+}
 
-	// Validate ignore directories
+// validateIgnoreDirectories validates the ignore directories configuration.
+func validateIgnoreDirectories() []string {
+	var errors []string
 	ignoreDirectories := viper.GetStringSlice("ignoreDirectories")
 	for i, dir := range ignoreDirectories {
 		dir = strings.TrimSpace(dir)
 		if dir == "" {
-			validationErrors = append(validationErrors, fmt.Sprintf("ignoreDirectories[%d] is empty", i))
+			errors = append(errors, fmt.Sprintf("ignoreDirectories[%d] is empty", i))
 			continue
 		}
 		if strings.Contains(dir, "/") {
-			validationErrors = append(validationErrors, fmt.Sprintf("ignoreDirectories[%d] (%s) contains path separator - only directory names are allowed", i, dir))
+			errors = append(
+				errors,
+				fmt.Sprintf(
+					"ignoreDirectories[%d] (%s) contains path separator - only directory names are allowed",
+					i,
+					dir,
+				),
+			)
 		}
 		if strings.HasPrefix(dir, ".") && dir != ".git" && dir != ".vscode" && dir != ".idea" {
-			validationErrors = append(validationErrors, fmt.Sprintf("ignoreDirectories[%d] (%s) starts with dot - this may cause unexpected behavior", i, dir))
+			errors = append(
+				errors,
+				fmt.Sprintf("ignoreDirectories[%d] (%s) starts with dot - this may cause unexpected behavior", i, dir),
+			)
 		}
 	}
+	return errors
+}
 
-	// Validate supported output formats if configured
+// validateSupportedFormats validates the supported output formats configuration.
+func validateSupportedFormats() []string {
+	var errors []string
 	if viper.IsSet("supportedFormats") {
 		supportedFormats := viper.GetStringSlice("supportedFormats")
 		validFormats := map[string]bool{"json": true, "yaml": true, "markdown": true}
 		for i, format := range supportedFormats {
 			format = strings.ToLower(strings.TrimSpace(format))
 			if !validFormats[format] {
-				validationErrors = append(validationErrors, fmt.Sprintf("supportedFormats[%d] (%s) is not a valid format (json, yaml, markdown)", i, format))
+				errors = append(
+					errors,
+					fmt.Sprintf("supportedFormats[%d] (%s) is not a valid format (json, yaml, markdown)", i, format),
+				)
 			}
 		}
 	}
+	return errors
+}
 
-	// Validate concurrency settings if configured
+// validateConcurrencySettings validates the concurrency settings configuration.
+func validateConcurrencySettings() []string {
+	var errors []string
 	if viper.IsSet("maxConcurrency") {
 		maxConcurrency := viper.GetInt("maxConcurrency")
 		if maxConcurrency < 1 {
-			validationErrors = append(validationErrors, fmt.Sprintf("maxConcurrency (%d) must be at least 1", maxConcurrency))
+			errors = append(
+				errors,
+				fmt.Sprintf("maxConcurrency (%d) must be at least 1", maxConcurrency),
+			)
 		}
 		if maxConcurrency > 100 {
-			validationErrors = append(validationErrors, fmt.Sprintf("maxConcurrency (%d) is unreasonably high (max 100)", maxConcurrency))
+			errors = append(
+				errors,
+				fmt.Sprintf("maxConcurrency (%d) is unreasonably high (max 100)", maxConcurrency),
+			)
 		}
 	}
+	return errors
+}
 
-	// Validate file patterns if configured
+// validateFilePatterns validates the file patterns configuration.
+func validateFilePatterns() []string {
+	var errors []string
 	if viper.IsSet("filePatterns") {
 		filePatterns := viper.GetStringSlice("filePatterns")
 		for i, pattern := range filePatterns {
 			pattern = strings.TrimSpace(pattern)
 			if pattern == "" {
-				validationErrors = append(validationErrors, fmt.Sprintf("filePatterns[%d] is empty", i))
+				errors = append(errors, fmt.Sprintf("filePatterns[%d] is empty", i))
 				continue
 			}
 			// Basic validation - patterns should contain at least one alphanumeric character
 			if !strings.ContainsAny(pattern, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789") {
-				validationErrors = append(validationErrors, fmt.Sprintf("filePatterns[%d] (%s) appears to be invalid", i, pattern))
+				errors = append(
+					errors,
+					fmt.Sprintf("filePatterns[%d] (%s) appears to be invalid", i, pattern),
+				)
 			}
 		}
 	}
+	return errors
+}
 
-	// Validate FileTypeRegistry configuration
-	if viper.IsSet("fileTypes.customImageExtensions") {
-		customImages := viper.GetStringSlice("fileTypes.customImageExtensions")
-		for i, ext := range customImages {
-			ext = strings.TrimSpace(ext)
-			if ext == "" {
-				validationErrors = append(validationErrors, fmt.Sprintf("fileTypes.customImageExtensions[%d] is empty", i))
-				continue
-			}
-			if !strings.HasPrefix(ext, ".") {
-				validationErrors = append(validationErrors, fmt.Sprintf("fileTypes.customImageExtensions[%d] (%s) must start with a dot", i, ext))
-			}
-		}
+// validateFileTypes validates the FileTypeRegistry configuration.
+// validateCustomImageExtensions validates custom image extensions configuration.
+func validateCustomImageExtensions() []string {
+	var errors []string
+	if !viper.IsSet("fileTypes.customImageExtensions") {
+		return errors
 	}
 
-	if viper.IsSet("fileTypes.customBinaryExtensions") {
-		customBinary := viper.GetStringSlice("fileTypes.customBinaryExtensions")
-		for i, ext := range customBinary {
-			ext = strings.TrimSpace(ext)
-			if ext == "" {
-				validationErrors = append(validationErrors, fmt.Sprintf("fileTypes.customBinaryExtensions[%d] is empty", i))
-				continue
-			}
-			if !strings.HasPrefix(ext, ".") {
-				validationErrors = append(validationErrors, fmt.Sprintf("fileTypes.customBinaryExtensions[%d] (%s) must start with a dot", i, ext))
-			}
+	customImages := viper.GetStringSlice("fileTypes.customImageExtensions")
+	for i, ext := range customImages {
+		ext = strings.TrimSpace(ext)
+		if ext == "" {
+			errors = append(
+				errors,
+				fmt.Sprintf("fileTypes.customImageExtensions[%d] is empty", i),
+			)
+			continue
 		}
+		if !strings.HasPrefix(ext, ".") {
+			errors = append(
+				errors,
+				fmt.Sprintf("fileTypes.customImageExtensions[%d] (%s) must start with a dot", i, ext),
+			)
+		}
+	}
+	return errors
+}
+
+// validateCustomBinaryExtensions validates custom binary extensions configuration.
+func validateCustomBinaryExtensions() []string {
+	var errors []string
+	if !viper.IsSet("fileTypes.customBinaryExtensions") {
+		return errors
 	}
 
-	if viper.IsSet("fileTypes.customLanguages") {
-		customLangs := viper.GetStringMapString("fileTypes.customLanguages")
-		for ext, lang := range customLangs {
-			ext = strings.TrimSpace(ext)
-			lang = strings.TrimSpace(lang)
-			if ext == "" {
-				validationErrors = append(validationErrors, "fileTypes.customLanguages contains empty extension key")
-				continue
-			}
-			if !strings.HasPrefix(ext, ".") {
-				validationErrors = append(validationErrors, fmt.Sprintf("fileTypes.customLanguages extension (%s) must start with a dot", ext))
-			}
-			if lang == "" {
-				validationErrors = append(validationErrors, fmt.Sprintf("fileTypes.customLanguages[%s] has empty language value", ext))
-			}
+	customBinary := viper.GetStringSlice("fileTypes.customBinaryExtensions")
+	for i, ext := range customBinary {
+		ext = strings.TrimSpace(ext)
+		if ext == "" {
+			errors = append(
+				errors,
+				fmt.Sprintf("fileTypes.customBinaryExtensions[%d] is empty", i),
+			)
+			continue
 		}
+		if !strings.HasPrefix(ext, ".") {
+			errors = append(
+				errors,
+				fmt.Sprintf("fileTypes.customBinaryExtensions[%d] (%s) must start with a dot", i, ext),
+			)
+		}
+	}
+	return errors
+}
+
+// validateCustomLanguages validates custom languages configuration.
+func validateCustomLanguages() []string {
+	var errors []string
+	if !viper.IsSet("fileTypes.customLanguages") {
+		return errors
 	}
 
-	// Validate back-pressure configuration
-	if viper.IsSet("backpressure.maxPendingFiles") {
-		maxPendingFiles := viper.GetInt("backpressure.maxPendingFiles")
-		if maxPendingFiles < 1 {
-			validationErrors = append(validationErrors, fmt.Sprintf("backpressure.maxPendingFiles (%d) must be at least 1", maxPendingFiles))
+	customLangs := viper.GetStringMapString("fileTypes.customLanguages")
+	for ext, lang := range customLangs {
+		ext = strings.TrimSpace(ext)
+		lang = strings.TrimSpace(lang)
+		if ext == "" {
+			errors = append(errors, "fileTypes.customLanguages contains empty extension key")
+			continue
 		}
-		if maxPendingFiles > 100000 {
-			validationErrors = append(validationErrors, fmt.Sprintf("backpressure.maxPendingFiles (%d) is unreasonably high (max 100000)", maxPendingFiles))
+		if !strings.HasPrefix(ext, ".") {
+			errors = append(
+				errors,
+				fmt.Sprintf("fileTypes.customLanguages extension (%s) must start with a dot", ext),
+			)
 		}
+		if lang == "" {
+			errors = append(
+				errors,
+				fmt.Sprintf("fileTypes.customLanguages[%s] has empty language value", ext),
+			)
+		}
+	}
+	return errors
+}
+
+// validateFileTypes validates the FileTypeRegistry configuration.
+func validateFileTypes() []string {
+	var errors []string
+	errors = append(errors, validateCustomImageExtensions()...)
+	errors = append(errors, validateCustomBinaryExtensions()...)
+	errors = append(errors, validateCustomLanguages()...)
+	return errors
+}
+
+// validateBackpressureConfig validates the back-pressure configuration.
+// validateBackpressureMaxPendingFiles validates max pending files configuration.
+func validateBackpressureMaxPendingFiles() []string {
+	var errors []string
+	if !viper.IsSet("backpressure.maxPendingFiles") {
+		return errors
 	}
 
-	if viper.IsSet("backpressure.maxPendingWrites") {
-		maxPendingWrites := viper.GetInt("backpressure.maxPendingWrites")
-		if maxPendingWrites < 1 {
-			validationErrors = append(validationErrors, fmt.Sprintf("backpressure.maxPendingWrites (%d) must be at least 1", maxPendingWrites))
-		}
-		if maxPendingWrites > 10000 {
-			validationErrors = append(validationErrors, fmt.Sprintf("backpressure.maxPendingWrites (%d) is unreasonably high (max 10000)", maxPendingWrites))
-		}
+	maxPendingFiles := viper.GetInt("backpressure.maxPendingFiles")
+	if maxPendingFiles < 1 {
+		errors = append(
+			errors,
+			fmt.Sprintf("backpressure.maxPendingFiles (%d) must be at least 1", maxPendingFiles),
+		)
+	}
+	if maxPendingFiles > 100000 {
+		errors = append(
+			errors,
+			fmt.Sprintf("backpressure.maxPendingFiles (%d) is unreasonably high (max 100000)", maxPendingFiles),
+		)
+	}
+	return errors
+}
+
+// validateBackpressureMaxPendingWrites validates max pending writes configuration.
+func validateBackpressureMaxPendingWrites() []string {
+	var errors []string
+	if !viper.IsSet("backpressure.maxPendingWrites") {
+		return errors
 	}
 
-	if viper.IsSet("backpressure.maxMemoryUsage") {
-		maxMemoryUsage := viper.GetInt64("backpressure.maxMemoryUsage")
-		if maxMemoryUsage < 1048576 { // 1MB minimum
-			validationErrors = append(validationErrors, fmt.Sprintf("backpressure.maxMemoryUsage (%d) must be at least 1MB (1048576 bytes)", maxMemoryUsage))
-		}
-		if maxMemoryUsage > 10737418240 { // 10GB maximum
-			validationErrors = append(validationErrors, fmt.Sprintf("backpressure.maxMemoryUsage (%d) is unreasonably high (max 10GB)", maxMemoryUsage))
-		}
+	maxPendingWrites := viper.GetInt("backpressure.maxPendingWrites")
+	if maxPendingWrites < 1 {
+		errors = append(
+			errors,
+			fmt.Sprintf("backpressure.maxPendingWrites (%d) must be at least 1", maxPendingWrites),
+		)
+	}
+	if maxPendingWrites > 10000 {
+		errors = append(
+			errors,
+			fmt.Sprintf("backpressure.maxPendingWrites (%d) is unreasonably high (max 10000)", maxPendingWrites),
+		)
+	}
+	return errors
+}
+
+// validateBackpressureMaxMemoryUsage validates max memory usage configuration.
+func validateBackpressureMaxMemoryUsage() []string {
+	var errors []string
+	if !viper.IsSet("backpressure.maxMemoryUsage") {
+		return errors
 	}
 
-	if viper.IsSet("backpressure.memoryCheckInterval") {
-		interval := viper.GetInt("backpressure.memoryCheckInterval")
-		if interval < 1 {
-			validationErrors = append(validationErrors, fmt.Sprintf("backpressure.memoryCheckInterval (%d) must be at least 1", interval))
-		}
-		if interval > 100000 {
-			validationErrors = append(validationErrors, fmt.Sprintf("backpressure.memoryCheckInterval (%d) is unreasonably high (max 100000)", interval))
-		}
+	maxMemoryUsage := viper.GetInt64("backpressure.maxMemoryUsage")
+	if maxMemoryUsage < 1048576 { // 1MB minimum
+		errors = append(
+			errors,
+			fmt.Sprintf("backpressure.maxMemoryUsage (%d) must be at least 1MB (1048576 bytes)", maxMemoryUsage),
+		)
+	}
+	if maxMemoryUsage > 104857600 { // 100MB maximum
+		errors = append(
+			errors,
+			fmt.Sprintf("backpressure.maxMemoryUsage (%d) is unreasonably high (max 100MB)", maxMemoryUsage),
+		)
+	}
+	return errors
+}
+
+// validateBackpressureMemoryCheckInterval validates memory check interval configuration.
+func validateBackpressureMemoryCheckInterval() []string {
+	var errors []string
+	if !viper.IsSet("backpressure.memoryCheckInterval") {
+		return errors
 	}
 
-	// Validate resource limits configuration
-	if viper.IsSet("resourceLimits.maxFiles") {
-		maxFiles := viper.GetInt("resourceLimits.maxFiles")
-		if maxFiles < MinMaxFiles {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.maxFiles (%d) must be at least %d", maxFiles, MinMaxFiles))
-		}
-		if maxFiles > MaxMaxFiles {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.maxFiles (%d) exceeds maximum (%d)", maxFiles, MaxMaxFiles))
-		}
+	interval := viper.GetInt("backpressure.memoryCheckInterval")
+	if interval < 1 {
+		errors = append(
+			errors,
+			fmt.Sprintf("backpressure.memoryCheckInterval (%d) must be at least 1", interval),
+		)
+	}
+	if interval > 100000 {
+		errors = append(
+			errors,
+			fmt.Sprintf("backpressure.memoryCheckInterval (%d) is unreasonably high (max 100000)", interval),
+		)
+	}
+	return errors
+}
+
+// validateBackpressureConfig validates the back-pressure configuration.
+func validateBackpressureConfig() []string {
+	var errors []string
+	errors = append(errors, validateBackpressureMaxPendingFiles()...)
+	errors = append(errors, validateBackpressureMaxPendingWrites()...)
+	errors = append(errors, validateBackpressureMaxMemoryUsage()...)
+	errors = append(errors, validateBackpressureMemoryCheckInterval()...)
+	return errors
+}
+
+// validateResourceLimits validates the resource limits configuration.
+// validateResourceLimitsMaxFiles validates max files configuration.
+func validateResourceLimitsMaxFiles() []string {
+	var errors []string
+	if !viper.IsSet("resourceLimits.maxFiles") {
+		return errors
 	}
 
-	if viper.IsSet("resourceLimits.maxTotalSize") {
-		maxTotalSize := viper.GetInt64("resourceLimits.maxTotalSize")
-		if maxTotalSize < MinMaxTotalSize {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.maxTotalSize (%d) must be at least %d", maxTotalSize, MinMaxTotalSize))
-		}
-		if maxTotalSize > MaxMaxTotalSize {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.maxTotalSize (%d) exceeds maximum (%d)", maxTotalSize, MaxMaxTotalSize))
-		}
+	maxFiles := viper.GetInt("resourceLimits.maxFiles")
+	if maxFiles < MinMaxFiles {
+		errors = append(
+			errors,
+			fmt.Sprintf("resourceLimits.maxFiles (%d) must be at least %d", maxFiles, MinMaxFiles),
+		)
 	}
+	if maxFiles > MaxMaxFiles {
+		errors = append(
+			errors,
+			fmt.Sprintf("resourceLimits.maxFiles (%d) exceeds maximum (%d)", maxFiles, MaxMaxFiles),
+		)
+	}
+	return errors
+}
+
+// validateResourceLimitsMaxTotalSize validates max total size configuration.
+func validateResourceLimitsMaxTotalSize() []string {
+	var errors []string
+	if !viper.IsSet("resourceLimits.maxTotalSize") {
+		return errors
+	}
+
+	maxTotalSize := viper.GetInt64("resourceLimits.maxTotalSize")
+	if maxTotalSize < MinMaxTotalSize {
+		errors = append(
+			errors,
+			fmt.Sprintf("resourceLimits.maxTotalSize (%d) must be at least %d", maxTotalSize, MinMaxTotalSize),
+		)
+	}
+	if maxTotalSize > MaxMaxTotalSize {
+		errors = append(
+			errors,
+			fmt.Sprintf("resourceLimits.maxTotalSize (%d) exceeds maximum (%d)", maxTotalSize, MaxMaxTotalSize),
+		)
+	}
+	return errors
+}
+
+// validateResourceLimitsTimeouts validates timeout configurations.
+func validateResourceLimitsTimeouts() []string {
+	var errors []string
 
 	if viper.IsSet("resourceLimits.fileProcessingTimeoutSec") {
 		timeout := viper.GetInt("resourceLimits.fileProcessingTimeoutSec")
 		if timeout < MinFileProcessingTimeoutSec {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.fileProcessingTimeoutSec (%d) must be at least %d", timeout, MinFileProcessingTimeoutSec))
+			errors = append(
+				errors,
+				fmt.Sprintf(
+					"resourceLimits.fileProcessingTimeoutSec (%d) must be at least %d",
+					timeout,
+					MinFileProcessingTimeoutSec,
+				),
+			)
 		}
 		if timeout > MaxFileProcessingTimeoutSec {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.fileProcessingTimeoutSec (%d) exceeds maximum (%d)", timeout, MaxFileProcessingTimeoutSec))
+			errors = append(
+				errors,
+				fmt.Sprintf(
+					"resourceLimits.fileProcessingTimeoutSec (%d) exceeds maximum (%d)",
+					timeout,
+					MaxFileProcessingTimeoutSec,
+				),
+			)
 		}
 	}
 
 	if viper.IsSet("resourceLimits.overallTimeoutSec") {
 		timeout := viper.GetInt("resourceLimits.overallTimeoutSec")
 		if timeout < MinOverallTimeoutSec {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.overallTimeoutSec (%d) must be at least %d", timeout, MinOverallTimeoutSec))
+			errors = append(
+				errors,
+				fmt.Sprintf("resourceLimits.overallTimeoutSec (%d) must be at least %d", timeout, MinOverallTimeoutSec),
+			)
 		}
 		if timeout > MaxOverallTimeoutSec {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.overallTimeoutSec (%d) exceeds maximum (%d)", timeout, MaxOverallTimeoutSec))
+			errors = append(
+				errors,
+				fmt.Sprintf(
+					"resourceLimits.overallTimeoutSec (%d) exceeds maximum (%d)",
+					timeout,
+					MaxOverallTimeoutSec,
+				),
+			)
 		}
 	}
 
+	return errors
+}
+
+// validateResourceLimitsConcurrency validates concurrency configurations.
+func validateResourceLimitsConcurrency() []string {
+	var errors []string
+
 	if viper.IsSet("resourceLimits.maxConcurrentReads") {
 		maxReads := viper.GetInt("resourceLimits.maxConcurrentReads")
 		if maxReads < MinMaxConcurrentReads {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.maxConcurrentReads (%d) must be at least %d", maxReads, MinMaxConcurrentReads))
+			errors = append(
+				errors,
+				fmt.Sprintf(
+					"resourceLimits.maxConcurrentReads (%d) must be at least %d",
+					maxReads,
+					MinMaxConcurrentReads,
+				),
+			)
 		}
 		if maxReads > MaxMaxConcurrentReads {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.maxConcurrentReads (%d) exceeds maximum (%d)", maxReads, MaxMaxConcurrentReads))
+			errors = append(
+				errors,
+				fmt.Sprintf(
+					"resourceLimits.maxConcurrentReads (%d) exceeds maximum (%d)",
+					maxReads,
+					MaxMaxConcurrentReads,
+				),
+			)
 		}
 	}
 
 	if viper.IsSet("resourceLimits.rateLimitFilesPerSec") {
 		rateLimit := viper.GetInt("resourceLimits.rateLimitFilesPerSec")
 		if rateLimit < MinRateLimitFilesPerSec {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.rateLimitFilesPerSec (%d) must be at least %d", rateLimit, MinRateLimitFilesPerSec))
+			errors = append(
+				errors,
+				fmt.Sprintf(
+					"resourceLimits.rateLimitFilesPerSec (%d) must be at least %d",
+					rateLimit,
+					MinRateLimitFilesPerSec,
+				),
+			)
 		}
 		if rateLimit > MaxRateLimitFilesPerSec {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.rateLimitFilesPerSec (%d) exceeds maximum (%d)", rateLimit, MaxRateLimitFilesPerSec))
+			errors = append(
+				errors,
+				fmt.Sprintf(
+					"resourceLimits.rateLimitFilesPerSec (%d) exceeds maximum (%d)",
+					rateLimit,
+					MaxRateLimitFilesPerSec,
+				),
+			)
 		}
 	}
 
-	if viper.IsSet("resourceLimits.hardMemoryLimitMB") {
-		memLimit := viper.GetInt("resourceLimits.hardMemoryLimitMB")
-		if memLimit < MinHardMemoryLimitMB {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.hardMemoryLimitMB (%d) must be at least %d", memLimit, MinHardMemoryLimitMB))
-		}
-		if memLimit > MaxHardMemoryLimitMB {
-			validationErrors = append(validationErrors, fmt.Sprintf("resourceLimits.hardMemoryLimitMB (%d) exceeds maximum (%d)", memLimit, MaxHardMemoryLimitMB))
-		}
+	return errors
+}
+
+// validateResourceLimitsMemory validates memory limit configuration.
+func validateResourceLimitsMemory() []string {
+	var errors []string
+	if !viper.IsSet("resourceLimits.hardMemoryLimitMB") {
+		return errors
 	}
 
+	memLimit := viper.GetInt("resourceLimits.hardMemoryLimitMB")
+	if memLimit < MinHardMemoryLimitMB {
+		errors = append(
+			errors,
+			fmt.Sprintf(
+				"resourceLimits.hardMemoryLimitMB (%d) must be at least %d",
+				memLimit,
+				MinHardMemoryLimitMB,
+			),
+		)
+	}
+	if memLimit > MaxHardMemoryLimitMB {
+		errors = append(
+			errors,
+			fmt.Sprintf(
+				"resourceLimits.hardMemoryLimitMB (%d) exceeds maximum (%d)",
+				memLimit,
+				MaxHardMemoryLimitMB,
+			),
+		)
+	}
+	return errors
+}
+
+// validateResourceLimits validates the resource limits configuration.
+func validateResourceLimits() []string {
+	var errors []string
+	errors = append(errors, validateResourceLimitsMaxFiles()...)
+	errors = append(errors, validateResourceLimitsMaxTotalSize()...)
+	errors = append(errors, validateResourceLimitsTimeouts()...)
+	errors = append(errors, validateResourceLimitsConcurrency()...)
+	errors = append(errors, validateResourceLimitsMemory()...)
+	return errors
+}
+
+// ValidateConfig validates the loaded configuration.
+func ValidateConfig() error {
+	var validationErrors []string
+
+	// Collect validation errors from all validation helpers
+	validationErrors = append(validationErrors, validateFileSizeLimit()...)
+	validationErrors = append(validationErrors, validateIgnoreDirectories()...)
+	validationErrors = append(validationErrors, validateSupportedFormats()...)
+	validationErrors = append(validationErrors, validateConcurrencySettings()...)
+	validationErrors = append(validationErrors, validateFilePatterns()...)
+	validationErrors = append(validationErrors, validateFileTypes()...)
+	validationErrors = append(validationErrors, validateBackpressureConfig()...)
+	validationErrors = append(validationErrors, validateResourceLimits()...)
+
 	if len(validationErrors) > 0 {
-		return utils.NewStructuredError(
-			utils.ErrorTypeConfiguration,
-			utils.CodeConfigValidation,
+		return gibidiutils.NewStructuredError(
+			gibidiutils.ErrorTypeConfiguration,
+			gibidiutils.CodeConfigValidation,
 			"configuration validation failed: "+strings.Join(validationErrors, "; "),
 			"",
 			map[string]interface{}{"validation_errors": validationErrors},
@@ -253,9 +545,9 @@ func ValidateConfig() error {
 func ValidateFileSize(size int64) error {
 	limit := GetFileSizeLimit()
 	if size > limit {
-		return utils.NewStructuredError(
-			utils.ErrorTypeValidation,
-			utils.CodeValidationSize,
+		return gibidiutils.NewStructuredError(
+			gibidiutils.ErrorTypeValidation,
+			gibidiutils.CodeValidationSize,
 			fmt.Sprintf("file size (%d bytes) exceeds limit (%d bytes)", size, limit),
 			"",
 			map[string]interface{}{"file_size": size, "size_limit": limit},
@@ -267,9 +559,9 @@ func ValidateFileSize(size int64) error {
 // ValidateOutputFormat checks if an output format is valid.
 func ValidateOutputFormat(format string) error {
 	if !IsValidFormat(format) {
-		return utils.NewStructuredError(
-			utils.ErrorTypeValidation,
-			utils.CodeValidationFormat,
+		return gibidiutils.NewStructuredError(
+			gibidiutils.ErrorTypeValidation,
+			gibidiutils.CodeValidationFormat,
 			fmt.Sprintf("unsupported output format: %s (supported: json, yaml, markdown)", format),
 			"",
 			map[string]interface{}{"format": format},
@@ -281,9 +573,9 @@ func ValidateOutputFormat(format string) error {
 // ValidateConcurrency checks if a concurrency level is valid.
 func ValidateConcurrency(concurrency int) error {
 	if concurrency < 1 {
-		return utils.NewStructuredError(
-			utils.ErrorTypeValidation,
-			utils.CodeValidationFormat,
+		return gibidiutils.NewStructuredError(
+			gibidiutils.ErrorTypeValidation,
+			gibidiutils.CodeValidationFormat,
 			fmt.Sprintf("concurrency (%d) must be at least 1", concurrency),
 			"",
 			map[string]interface{}{"concurrency": concurrency},
@@ -293,9 +585,9 @@ func ValidateConcurrency(concurrency int) error {
 	if viper.IsSet("maxConcurrency") {
 		maxConcurrency := GetMaxConcurrency()
 		if concurrency > maxConcurrency {
-			return utils.NewStructuredError(
-				utils.ErrorTypeValidation,
-				utils.CodeValidationFormat,
+			return gibidiutils.NewStructuredError(
+				gibidiutils.ErrorTypeValidation,
+				gibidiutils.CodeValidationFormat,
 				fmt.Sprintf("concurrency (%d) exceeds maximum (%d)", concurrency, maxConcurrency),
 				"",
 				map[string]interface{}{"concurrency": concurrency, "max_concurrency": maxConcurrency},
@@ -304,4 +596,4 @@ func ValidateConcurrency(concurrency int) error {
 	}
 
 	return nil
-}
+}