feat: add workspace-isolated toolhost runtime and capability-gap skill loop

internal/knowledge/loader.go

@@ -26,28 +26,6 @@ func LoadSoul(path string) (string, error) {
 	return content, nil
 }
 
-func LoadSkills(dir string) (string, error) {
-	skills, err := LoadSkillSet(dir)
-	if err != nil {
-		return "", err
-	}
-
-	builder := strings.Builder{}
-	for _, skill := range skills {
-		builder.WriteString("## ")
-		builder.WriteString(skill.Name)
-		builder.WriteString("\n")
-		builder.WriteString(skill.Content)
-		builder.WriteString("\n\n")
-	}
-
-	out := strings.TrimSpace(builder.String())
-	if out == "" {
-		return "", fmt.Errorf("no non-empty markdown skills loaded from %s", dir)
-	}
-	return out, nil
-}
-
 func LoadSkillSet(dir string) ([]Skill, error) {
 	entries, err := os.ReadDir(dir)
 	if err != nil {