fix: sbx mixins must be passed in directories, not as files and the files must be named spec.yaml per new sbx version

src/config/mod.rs

@@ -147,6 +147,7 @@ const SBX_KIT_DIR_NAME: &str = "sbx-kit";
 const SBX_KIT_HASH_FILE: &str = "kit.sha256";
 const SBX_MIXIN_FILE_NAME: &str = "sbx-mixin.yaml";
 const SBX_VAULT_MIXINS_DIR_NAME: &str = "sbx-vault-mixins";
+const SBX_MIXIN_KITS_DIR_NAME: &str = "sbx-mixin-kits";
 const GIT_DIR_NAME: &str = ".git";
 const GITIGNORE_FILE_NAME: &str = ".gitignore";
 const DEFAULT_VISIBLE_TOOLS: [&str; 18] = [

src/config/paths.rs

@@ -4,8 +4,8 @@ use super::{
     ENV_FILE_NAME, FUNCTIONS_BIN_DIR_NAME, FUNCTIONS_DIR_NAME, GLOBAL_TOOLS_DIR_NAME,
     GLOBAL_TOOLS_UTILS_DIR_NAME, MACROS_DIR_NAME, MCP_FILE_NAME, MEMORY_DIR_NAME,
     MEMORY_INDEX_FILE_NAME, ModelsOverride, RAGS_DIR_NAME, ROLES_DIR_NAME, SBX_KIT_DIR_NAME,
-    SBX_KIT_HASH_FILE, SBX_MIXIN_FILE_NAME, SBX_VAULT_MIXINS_DIR_NAME, SKILLS_DIR_NAME,
-    WORKSPACE_MEMORY_DIR_NAME,
+    SBX_KIT_HASH_FILE, SBX_MIXIN_FILE_NAME, SBX_MIXIN_KITS_DIR_NAME, SBX_VAULT_MIXINS_DIR_NAME,
+    SKILLS_DIR_NAME, WORKSPACE_MEMORY_DIR_NAME,
 };
 use crate::client::ProviderModels;
 use crate::utils::{get_env_name, list_file_names, normalize_env_name};
@@ -154,6 +154,10 @@ pub fn sbx_vault_mixins_hash_file() -> PathBuf {
     sbx_vault_mixins_dir().join(SBX_KIT_HASH_FILE)
 }
 
+pub fn sbx_mixin_kits_dir() -> PathBuf {
+    cache_path().join(SBX_MIXIN_KITS_DIR_NAME)
+}
+
 pub fn config_file() -> PathBuf {
     match env::var(get_env_name("config_file")) {
         Ok(value) => PathBuf::from(value),