diff --git a/internal/models/profile_validation.go b/internal/models/profile_validation.go
new file mode 100644
index 000000000..92fae01f0
--- /dev/null
+++ b/internal/models/profile_validation.go
@@ -0,0 +1,365 @@
+package models
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+	"time"
+)
+
+// ConfigKeyDefinition defines a valid configuration key with its type and constraints.
+type ConfigKeyDefinition struct {
+	Key         string      // Config key name
+	Type        ConfigType  // Expected value type
+	Description string      // Human-readable description
+	Default     interface{} // Default value (nil if required)
+	Required    bool        // Whether the key is required
+	Min         *float64    // Minimum value for numbers
+	Max         *float64    // Maximum value for numbers
+	Pattern     string      // Regex pattern for strings
+	Enum        []string    // Allowed values for enums
+}
+
+// ConfigType represents the type of a configuration value.
+type ConfigType string
+
+const (
+	ConfigTypeString   ConfigType = "string"
+	ConfigTypeBool     ConfigType = "bool"
+	ConfigTypeInt      ConfigType = "int"
+	ConfigTypeFloat    ConfigType = "float"
+	ConfigTypeDuration ConfigType = "duration"
+	ConfigTypeEnum     ConfigType = "enum"
+)
+
+// ValidConfigKeys defines all valid agent configuration keys.
+var ValidConfigKeys = []ConfigKeyDefinition{
+	{
+		Key:         "interval",
+		Type:        ConfigTypeDuration,
+		Description: "Polling interval for metrics collection",
+		Default:     "30s",
+	},
+	{
+		Key:         "enable_docker",
+		Type:        ConfigTypeBool,
+		Description: "Enable Docker container monitoring",
+		Default:     true,
+	},
+	{
+		Key:         "enable_system_metrics",
+		Type:        ConfigTypeBool,
+		Description: "Enable system-level metrics (CPU, memory, disk)",
+		Default:     true,
+	},
+	{
+		Key:         "enable_process_metrics",
+		Type:        ConfigTypeBool,
+		Description: "Enable process-level metrics",
+		Default:     false,
+	},
+	{
+		Key:         "enable_network_metrics",
+		Type:        ConfigTypeBool,
+		Description: "Enable network interface metrics",
+		Default:     true,
+	},
+	{
+		Key:         "log_level",
+		Type:        ConfigTypeEnum,
+		Description: "Agent log verbosity level",
+		Default:     "info",
+		Enum:        []string{"debug", "info", "warn", "error"},
+	},
+	{
+		Key:         "metric_buffer_size",
+		Type:        ConfigTypeInt,
+		Description: "Size of the metric buffer before flush",
+		Default:     100,
+		Min:         ptrFloat(10),
+		Max:         ptrFloat(10000),
+	},
+	{
+		Key:         "connection_timeout",
+		Type:        ConfigTypeDuration,
+		Description: "Timeout for server connections",
+		Default:     "30s",
+	},
+	{
+		Key:         "retry_interval",
+		Type:        ConfigTypeDuration,
+		Description: "Interval between connection retries",
+		Default:     "5s",
+	},
+	{
+		Key:         "max_retries",
+		Type:        ConfigTypeInt,
+		Description: "Maximum number of connection retries",
+		Default:     3,
+		Min:         ptrFloat(0),
+		Max:         ptrFloat(100),
+	},
+	{
+		Key:         "disk_paths",
+		Type:        ConfigTypeString,
+		Description: "Comma-separated list of disk paths to monitor",
+		Default:     "/",
+	},
+	{
+		Key:         "exclude_containers",
+		Type:        ConfigTypeString,
+		Description: "Regex pattern for container names to exclude",
+		Default:     "",
+	},
+	{
+		Key:         "include_containers",
+		Type:        ConfigTypeString,
+		Description: "Regex pattern for container names to include (empty = all)",
+		Default:     "",
+	},
+	{
+		Key:         "cpu_threshold_warning",
+		Type:        ConfigTypeFloat,
+		Description: "CPU usage threshold for warnings (%)",
+		Default:     80.0,
+		Min:         ptrFloat(0),
+		Max:         ptrFloat(100),
+	},
+	{
+		Key:         "cpu_threshold_critical",
+		Type:        ConfigTypeFloat,
+		Description: "CPU usage threshold for critical alerts (%)",
+		Default:     95.0,
+		Min:         ptrFloat(0),
+		Max:         ptrFloat(100),
+	},
+	{
+		Key:         "memory_threshold_warning",
+		Type:        ConfigTypeFloat,
+		Description: "Memory usage threshold for warnings (%)",
+		Default:     80.0,
+		Min:         ptrFloat(0),
+		Max:         ptrFloat(100),
+	},
+	{
+		Key:         "memory_threshold_critical",
+		Type:        ConfigTypeFloat,
+		Description: "Memory usage threshold for critical alerts (%)",
+		Default:     95.0,
+		Min:         ptrFloat(0),
+		Max:         ptrFloat(100),
+	},
+	{
+		Key:         "disk_threshold_warning",
+		Type:        ConfigTypeFloat,
+		Description: "Disk usage threshold for warnings (%)",
+		Default:     80.0,
+		Min:         ptrFloat(0),
+		Max:         ptrFloat(100),
+	},
+	{
+		Key:         "disk_threshold_critical",
+		Type:        ConfigTypeFloat,
+		Description: "Disk usage threshold for critical alerts (%)",
+		Default:     95.0,
+		Min:         ptrFloat(0),
+		Max:         ptrFloat(100),
+	},
+}
+
+// ValidationError represents a validation error for a config key.
+type ValidationError struct {
+	Key     string
+	Message string
+}
+
+func (e ValidationError) Error() string {
+	return fmt.Sprintf("%s: %s", e.Key, e.Message)
+}
+
+// ValidationResult holds the result of config validation.
+type ValidationResult struct {
+	Valid    bool
+	Errors   []ValidationError
+	Warnings []ValidationError
+}
+
+// ProfileValidator validates agent profile configurations.
+type ProfileValidator struct {
+	keyDefs map[string]ConfigKeyDefinition
+}
+
+// NewProfileValidator creates a new profile validator.
+func NewProfileValidator() *ProfileValidator {
+	keyDefs := make(map[string]ConfigKeyDefinition)
+	for _, def := range ValidConfigKeys {
+		keyDefs[def.Key] = def
+	}
+	return &ProfileValidator{keyDefs: keyDefs}
+}
+
+// Validate validates an agent profile configuration.
+func (v *ProfileValidator) Validate(config AgentConfigMap) ValidationResult {
+	result := ValidationResult{Valid: true}
+
+	// Check for unknown keys
+	for key := range config {
+		if _, ok := v.keyDefs[key]; !ok {
+			result.Warnings = append(result.Warnings, ValidationError{
+				Key:     key,
+				Message: "Unknown configuration key (will be ignored by agent)",
+			})
+		}
+	}
+
+	// Validate known keys
+	for key, value := range config {
+		def, ok := v.keyDefs[key]
+		if !ok {
+			continue // Skip unknown keys (already warned)
+		}
+
+		if err := v.validateValue(def, value); err != nil {
+			result.Valid = false
+			result.Errors = append(result.Errors, ValidationError{
+				Key:     key,
+				Message: err.Error(),
+			})
+		}
+	}
+
+	// Check for required keys
+	for _, def := range v.keyDefs {
+		if def.Required {
+			if _, ok := config[def.Key]; !ok {
+				result.Valid = false
+				result.Errors = append(result.Errors, ValidationError{
+					Key:     def.Key,
+					Message: "Required configuration key is missing",
+				})
+			}
+		}
+	}
+
+	return result
+}
+
+// validateValue validates a single configuration value against its definition.
+func (v *ProfileValidator) validateValue(def ConfigKeyDefinition, value interface{}) error {
+	if value == nil {
+		if def.Required {
+			return fmt.Errorf("value cannot be null")
+		}
+		return nil
+	}
+
+	switch def.Type {
+	case ConfigTypeString:
+		s, ok := value.(string)
+		if !ok {
+			return fmt.Errorf("expected string, got %T", value)
+		}
+		if def.Pattern != "" {
+			re, err := regexp.Compile(def.Pattern)
+			if err != nil {
+				return fmt.Errorf("invalid pattern in definition: %v", err)
+			}
+			if !re.MatchString(s) {
+				return fmt.Errorf("value does not match pattern %s", def.Pattern)
+			}
+		}
+
+	case ConfigTypeBool:
+		if _, ok := value.(bool); !ok {
+			return fmt.Errorf("expected boolean, got %T", value)
+		}
+
+	case ConfigTypeInt:
+		var num float64
+		switch n := value.(type) {
+		case int:
+			num = float64(n)
+		case int64:
+			num = float64(n)
+		case float64:
+			if n != float64(int64(n)) {
+				return fmt.Errorf("expected integer, got float")
+			}
+			num = n
+		default:
+			return fmt.Errorf("expected integer, got %T", value)
+		}
+		if def.Min != nil && num < *def.Min {
+			return fmt.Errorf("value %v is below minimum %v", num, *def.Min)
+		}
+		if def.Max != nil && num > *def.Max {
+			return fmt.Errorf("value %v exceeds maximum %v", num, *def.Max)
+		}
+
+	case ConfigTypeFloat:
+		var num float64
+		switch n := value.(type) {
+		case int:
+			num = float64(n)
+		case int64:
+			num = float64(n)
+		case float64:
+			num = n
+		default:
+			return fmt.Errorf("expected number, got %T", value)
+		}
+		if def.Min != nil && num < *def.Min {
+			return fmt.Errorf("value %v is below minimum %v", num, *def.Min)
+		}
+		if def.Max != nil && num > *def.Max {
+			return fmt.Errorf("value %v exceeds maximum %v", num, *def.Max)
+		}
+
+	case ConfigTypeDuration:
+		s, ok := value.(string)
+		if !ok {
+			return fmt.Errorf("expected duration string, got %T", value)
+		}
+		if _, err := time.ParseDuration(s); err != nil {
+			return fmt.Errorf("invalid duration format: %v", err)
+		}
+
+	case ConfigTypeEnum:
+		s, ok := value.(string)
+		if !ok {
+			return fmt.Errorf("expected string, got %T", value)
+		}
+		found := false
+		for _, allowed := range def.Enum {
+			if strings.EqualFold(s, allowed) {
+				found = true
+				break
+			}
+		}
+		if !found {
+			return fmt.Errorf("value must be one of: %s", strings.Join(def.Enum, ", "))
+		}
+	}
+
+	return nil
+}
+
+// GetConfigKeyDefinitions returns all valid configuration key definitions.
+func GetConfigKeyDefinitions() []ConfigKeyDefinition {
+	return ValidConfigKeys
+}
+
+// GetConfigKeyDefinition returns the definition for a specific key.
+func GetConfigKeyDefinition(key string) (ConfigKeyDefinition, bool) {
+	for _, def := range ValidConfigKeys {
+		if def.Key == key {
+			return def, true
+		}
+	}
+	return ConfigKeyDefinition{}, false
+}
+
+// ptrFloat returns a pointer to a float64.
+func ptrFloat(v float64) *float64 {
+	return &v
+}
diff --git a/internal/models/profile_validation_test.go b/internal/models/profile_validation_test.go
new file mode 100644
index 000000000..9002505c1
--- /dev/null
+++ b/internal/models/profile_validation_test.go
@@ -0,0 +1,494 @@
+package models
+
+import (
+	"testing"
+)
+
+func TestProfileValidator_ValidateStringType(t *testing.T) {
+	validator := NewProfileValidator()
+
+	tests := []struct {
+		name    string
+		config  AgentConfigMap
+		wantErr bool
+		errKey  string
+	}{
+		{
+			name:    "valid string",
+			config:  AgentConfigMap{"disk_paths": "/,/home"},
+			wantErr: false,
+		},
+		{
+			name:    "invalid string type",
+			config:  AgentConfigMap{"disk_paths": 123},
+			wantErr: true,
+			errKey:  "disk_paths",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := validator.Validate(tt.config)
+			if tt.wantErr && result.Valid {
+				t.Errorf("expected validation to fail, but it passed")
+			}
+			if !tt.wantErr && !result.Valid {
+				t.Errorf("expected validation to pass, but it failed: %v", result.Errors)
+			}
+			if tt.wantErr && len(result.Errors) > 0 {
+				found := false
+				for _, err := range result.Errors {
+					if err.Key == tt.errKey {
+						found = true
+						break
+					}
+				}
+				if !found {
+					t.Errorf("expected error for key %s, but got: %v", tt.errKey, result.Errors)
+				}
+			}
+		})
+	}
+}
+
+func TestProfileValidator_ValidateBoolType(t *testing.T) {
+	validator := NewProfileValidator()
+
+	tests := []struct {
+		name    string
+		config  AgentConfigMap
+		wantErr bool
+		errKey  string
+	}{
+		{
+			name:    "valid bool true",
+			config:  AgentConfigMap{"enable_docker": true},
+			wantErr: false,
+		},
+		{
+			name:    "valid bool false",
+			config:  AgentConfigMap{"enable_docker": false},
+			wantErr: false,
+		},
+		{
+			name:    "invalid bool type - string",
+			config:  AgentConfigMap{"enable_docker": "true"},
+			wantErr: true,
+			errKey:  "enable_docker",
+		},
+		{
+			name:    "invalid bool type - int",
+			config:  AgentConfigMap{"enable_docker": 1},
+			wantErr: true,
+			errKey:  "enable_docker",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := validator.Validate(tt.config)
+			if tt.wantErr && result.Valid {
+				t.Errorf("expected validation to fail, but it passed")
+			}
+			if !tt.wantErr && !result.Valid {
+				t.Errorf("expected validation to pass, but it failed: %v", result.Errors)
+			}
+		})
+	}
+}
+
+func TestProfileValidator_ValidateIntType(t *testing.T) {
+	validator := NewProfileValidator()
+
+	tests := []struct {
+		name    string
+		config  AgentConfigMap
+		wantErr bool
+		errKey  string
+	}{
+		{
+			name:    "valid int",
+			config:  AgentConfigMap{"metric_buffer_size": 100},
+			wantErr: false,
+		},
+		{
+			name:    "valid int as float64 (JSON unmarshal)",
+			config:  AgentConfigMap{"metric_buffer_size": float64(100)},
+			wantErr: false,
+		},
+		{
+			name:    "int below minimum",
+			config:  AgentConfigMap{"metric_buffer_size": 5},
+			wantErr: true,
+			errKey:  "metric_buffer_size",
+		},
+		{
+			name:    "int above maximum",
+			config:  AgentConfigMap{"metric_buffer_size": 20000},
+			wantErr: true,
+			errKey:  "metric_buffer_size",
+		},
+		{
+			name:    "invalid int type - string",
+			config:  AgentConfigMap{"metric_buffer_size": "100"},
+			wantErr: true,
+			errKey:  "metric_buffer_size",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := validator.Validate(tt.config)
+			if tt.wantErr && result.Valid {
+				t.Errorf("expected validation to fail, but it passed")
+			}
+			if !tt.wantErr && !result.Valid {
+				t.Errorf("expected validation to pass, but it failed: %v", result.Errors)
+			}
+		})
+	}
+}
+
+func TestProfileValidator_ValidateFloatType(t *testing.T) {
+	validator := NewProfileValidator()
+
+	tests := []struct {
+		name    string
+		config  AgentConfigMap
+		wantErr bool
+		errKey  string
+	}{
+		{
+			name:    "valid float",
+			config:  AgentConfigMap{"cpu_threshold_warning": 80.5},
+			wantErr: false,
+		},
+		{
+			name:    "valid float as int",
+			config:  AgentConfigMap{"cpu_threshold_warning": 80},
+			wantErr: false,
+		},
+		{
+			name:    "float below minimum",
+			config:  AgentConfigMap{"cpu_threshold_warning": -10.0},
+			wantErr: true,
+			errKey:  "cpu_threshold_warning",
+		},
+		{
+			name:    "float above maximum",
+			config:  AgentConfigMap{"cpu_threshold_warning": 150.0},
+			wantErr: true,
+			errKey:  "cpu_threshold_warning",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := validator.Validate(tt.config)
+			if tt.wantErr && result.Valid {
+				t.Errorf("expected validation to fail, but it passed")
+			}
+			if !tt.wantErr && !result.Valid {
+				t.Errorf("expected validation to pass, but it failed: %v", result.Errors)
+			}
+		})
+	}
+}
+
+func TestProfileValidator_ValidateDurationType(t *testing.T) {
+	validator := NewProfileValidator()
+
+	tests := []struct {
+		name    string
+		config  AgentConfigMap
+		wantErr bool
+		errKey  string
+	}{
+		{
+			name:    "valid duration seconds",
+			config:  AgentConfigMap{"interval": "30s"},
+			wantErr: false,
+		},
+		{
+			name:    "valid duration minutes",
+			config:  AgentConfigMap{"interval": "5m"},
+			wantErr: false,
+		},
+		{
+			name:    "valid duration hours",
+			config:  AgentConfigMap{"interval": "1h"},
+			wantErr: false,
+		},
+		{
+			name:    "valid duration complex",
+			config:  AgentConfigMap{"interval": "1h30m45s"},
+			wantErr: false,
+		},
+		{
+			name:    "invalid duration format",
+			config:  AgentConfigMap{"interval": "30"},
+			wantErr: true,
+			errKey:  "interval",
+		},
+		{
+			name:    "invalid duration - not a string",
+			config:  AgentConfigMap{"interval": 30},
+			wantErr: true,
+			errKey:  "interval",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := validator.Validate(tt.config)
+			if tt.wantErr && result.Valid {
+				t.Errorf("expected validation to fail, but it passed")
+			}
+			if !tt.wantErr && !result.Valid {
+				t.Errorf("expected validation to pass, but it failed: %v", result.Errors)
+			}
+		})
+	}
+}
+
+func TestProfileValidator_ValidateEnumType(t *testing.T) {
+	validator := NewProfileValidator()
+
+	tests := []struct {
+		name    string
+		config  AgentConfigMap
+		wantErr bool
+		errKey  string
+	}{
+		{
+			name:    "valid enum debug",
+			config:  AgentConfigMap{"log_level": "debug"},
+			wantErr: false,
+		},
+		{
+			name:    "valid enum info",
+			config:  AgentConfigMap{"log_level": "info"},
+			wantErr: false,
+		},
+		{
+			name:    "valid enum warn",
+			config:  AgentConfigMap{"log_level": "warn"},
+			wantErr: false,
+		},
+		{
+			name:    "valid enum error",
+			config:  AgentConfigMap{"log_level": "error"},
+			wantErr: false,
+		},
+		{
+			name:    "invalid enum value",
+			config:  AgentConfigMap{"log_level": "trace"},
+			wantErr: true,
+			errKey:  "log_level",
+		},
+		{
+			name:    "invalid enum type",
+			config:  AgentConfigMap{"log_level": 1},
+			wantErr: true,
+			errKey:  "log_level",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := validator.Validate(tt.config)
+			if tt.wantErr && result.Valid {
+				t.Errorf("expected validation to fail, but it passed")
+			}
+			if !tt.wantErr && !result.Valid {
+				t.Errorf("expected validation to pass, but it failed: %v", result.Errors)
+			}
+		})
+	}
+}
+
+func TestProfileValidator_UnknownKeysWarning(t *testing.T) {
+	validator := NewProfileValidator()
+
+	config := AgentConfigMap{
+		"interval":    "30s",
+		"unknown_key": "some_value",
+	}
+
+	result := validator.Validate(config)
+
+	// Should still be valid (warnings don't fail validation)
+	if !result.Valid {
+		t.Errorf("expected validation to pass with warnings, but it failed: %v", result.Errors)
+	}
+
+	// Should have a warning for unknown key
+	if len(result.Warnings) == 0 {
+		t.Errorf("expected a warning for unknown key, but got none")
+	}
+
+	found := false
+	for _, w := range result.Warnings {
+		if w.Key == "unknown_key" {
+			found = true
+			break
+		}
+	}
+	if !found {
+		t.Errorf("expected warning for 'unknown_key', got: %v", result.Warnings)
+	}
+}
+
+func TestProfileValidator_ComplexConfig(t *testing.T) {
+	validator := NewProfileValidator()
+
+	config := AgentConfigMap{
+		"interval":               "30s",
+		"enable_docker":          true,
+		"enable_system_metrics":  true,
+		"enable_process_metrics": false,
+		"log_level":              "info",
+		"metric_buffer_size":     100,
+		"cpu_threshold_warning":  80.0,
+		"cpu_threshold_critical": 95.0,
+		"disk_paths":             "/,/home",
+	}
+
+	result := validator.Validate(config)
+
+	if !result.Valid {
+		t.Errorf("expected complex config to be valid, but got errors: %v", result.Errors)
+	}
+}
+
+func TestProfileValidator_NullValue(t *testing.T) {
+	validator := NewProfileValidator()
+
+	config := AgentConfigMap{
+		"interval": nil,
+	}
+
+	result := validator.Validate(config)
+
+	// Null values should be valid for non-required keys
+	if !result.Valid {
+		t.Errorf("expected null value to be valid for non-required key, but got errors: %v", result.Errors)
+	}
+}
+
+func TestGetConfigKeyDefinitions(t *testing.T) {
+	defs := GetConfigKeyDefinitions()
+
+	if len(defs) == 0 {
+		t.Error("expected config key definitions to be non-empty")
+	}
+
+	// Check some known keys exist
+	expectedKeys := []string{"interval", "enable_docker", "log_level", "metric_buffer_size"}
+	for _, key := range expectedKeys {
+		found := false
+		for _, def := range defs {
+			if def.Key == key {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Errorf("expected key %s to be in definitions", key)
+		}
+	}
+}
+
+func TestGetConfigKeyDefinition(t *testing.T) {
+	def, found := GetConfigKeyDefinition("interval")
+	if !found {
+		t.Error("expected to find 'interval' definition")
+	}
+	if def.Type != ConfigTypeDuration {
+		t.Errorf("expected 'interval' type to be Duration, got %s", def.Type)
+	}
+
+	_, found = GetConfigKeyDefinition("nonexistent_key")
+	if found {
+		t.Error("expected not to find 'nonexistent_key' definition")
+	}
+}
+
+func TestAgentProfile_MergedConfig(t *testing.T) {
+	parentProfile := AgentProfile{
+		ID:   "parent-1",
+		Name: "Parent Profile",
+		Config: AgentConfigMap{
+			"interval":      "30s",
+			"enable_docker": true,
+			"log_level":     "info",
+		},
+	}
+
+	childProfile := AgentProfile{
+		ID:       "child-1",
+		Name:     "Child Profile",
+		ParentID: "parent-1",
+		Config: AgentConfigMap{
+			"interval":  "10s",   // Override parent
+			"log_level": "debug", // Override parent
+		},
+	}
+
+	profiles := []AgentProfile{parentProfile, childProfile}
+
+	merged := childProfile.MergedConfig(profiles)
+
+	// Child's interval should override parent's
+	if merged["interval"] != "10s" {
+		t.Errorf("expected interval to be '10s', got %v", merged["interval"])
+	}
+
+	// Child's log_level should override parent's
+	if merged["log_level"] != "debug" {
+		t.Errorf("expected log_level to be 'debug', got %v", merged["log_level"])
+	}
+
+	// Parent's enable_docker should be inherited
+	if merged["enable_docker"] != true {
+		t.Errorf("expected enable_docker to be true, got %v", merged["enable_docker"])
+	}
+}
+
+func TestAgentProfile_MergedConfigNoParent(t *testing.T) {
+	profile := AgentProfile{
+		ID:   "profile-1",
+		Name: "Standalone Profile",
+		Config: AgentConfigMap{
+			"interval": "30s",
+		},
+	}
+
+	profiles := []AgentProfile{profile}
+
+	merged := profile.MergedConfig(profiles)
+
+	if merged["interval"] != "30s" {
+		t.Errorf("expected interval to be '30s', got %v", merged["interval"])
+	}
+}
+
+func TestAgentProfile_MergedConfigParentNotFound(t *testing.T) {
+	profile := AgentProfile{
+		ID:       "child-1",
+		Name:     "Child Profile",
+		ParentID: "nonexistent-parent",
+		Config: AgentConfigMap{
+			"interval": "10s",
+		},
+	}
+
+	profiles := []AgentProfile{profile}
+
+	// Should return just the child's config if parent not found
+	merged := profile.MergedConfig(profiles)
+
+	if merged["interval"] != "10s" {
+		t.Errorf("expected interval to be '10s', got %v", merged["interval"])
+	}
+}