feat(): 完成 skills 领域模型与本地注册表基础能力

internal/skills/errors.go

@@ -0,0 +1,12 @@
+package skills
+
+import "errors"
+
+var (
+	// ErrSkillNotFound indicates registry cannot find a skill by id.
+	ErrSkillNotFound = errors.New("skills: skill not found")
+	// ErrEmptyContent indicates parsed skill content has no usable instruction.
+	ErrEmptyContent = errors.New("skills: content is empty")
+	// ErrSkillRootNotFound indicates configured local root does not exist.
+	ErrSkillRootNotFound = errors.New("skills: root directory not found")
+)

internal/skills/filter.go

@@ -0,0 +1,33 @@
+package skills
+
+import "strings"
+
+func allowBySource(input ListInput, descriptor Descriptor) bool {
+	if len(input.SourceKinds) == 0 {
+		return true
+	}
+	for _, kind := range input.SourceKinds {
+		if descriptor.Source.Kind == kind {
+			return true
+		}
+	}
+	return false
+}
+
+func allowByScope(input ListInput, descriptor Descriptor) bool {
+	if len(input.Scopes) > 0 {
+		for _, scope := range input.Scopes {
+			if descriptor.Scope == scope {
+				return true
+			}
+		}
+		return false
+	}
+
+	switch descriptor.Scope {
+	case ScopeWorkspace:
+		return strings.TrimSpace(input.Workspace) != ""
+	default:
+		return true
+	}
+}