Revert v2-v5 validation changes - frozen packages should not be modified

Only pkg/config/latest/validate.go retains the optional path change.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: nunocoracao

pkg/config/v2/validate.go

@@ -66,7 +66,9 @@ func (t *Toolset) validate() error {
 
 	switch t.Type {
 	case "memory":
-		// path is optional; defaults to ~/.cagent/memory/<agent-name>/memory.db
+		if t.Path == "" {
+			return errors.New("memory toolset requires a path to be set")
+		}
 	case "mcp":
 		count := 0
 		if t.Command != "" {

pkg/config/v3/validate.go

@@ -87,7 +87,9 @@ func (t *Toolset) validate() error {
 			return errors.New("sandbox requires at least one path to be set")
 		}
 	case "memory":
-		// path is optional; defaults to ~/.cagent/memory/<agent-name>/memory.db
+		if t.Path == "" {
+			return errors.New("memory toolset requires a path to be set")
+		}
 	case "mcp":
 		count := 0
 		if t.Command != "" {

pkg/config/v4/validate.go

@@ -110,7 +110,9 @@ func (t *Toolset) validate() error {
 			return errors.New("sandbox requires at least one path to be set")
 		}
 	case "memory":
-		// path is optional; defaults to ~/.cagent/memory/<agent-name>/memory.db
+		if t.Path == "" {
+			return errors.New("memory toolset requires a path to be set")
+		}
 	case "mcp":
 		count := 0
 		if t.Command != "" {

pkg/config/v5/validate.go

@@ -113,7 +113,9 @@ func (t *Toolset) validate() error {
 			return errors.New("sandbox requires at least one path to be set")
 		}
 	case "memory":
-		// path is optional; defaults to ~/.cagent/memory/<agent-name>/memory.db
+		if t.Path == "" {
+			return errors.New("memory toolset requires a path to be set")
+		}
 	case "tasks":
 		// path defaults to ./tasks.json if not set
 	case "mcp":

pkg/config/validation_test.go

@@ -36,6 +36,10 @@ func TestValidationErrors(t *testing.T) {
 		name string
 		path string
 	}{
+		{
+			name: "memory toolset missing path",
+			path: "missing_memory_path_v2.yaml",
+		},
 		{
 			name: "path in non memory toolset",
 			path: "invalid_path_v2.yaml",