From a8321788105732e0e253e69222cb41e750ead956 Mon Sep 17 00:00:00 2001
From: goulustis <cnimaiv@gmail.com>
Date: Sat, 28 Feb 2026 15:49:10 +0800
Subject: [PATCH] a virtual in memory filesystem backend

---
 lang_agent/fs_bkends/statebk.py | 70 +++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 lang_agent/fs_bkends/statebk.py

diff --git a/lang_agent/fs_bkends/statebk.py b/lang_agent/fs_bkends/statebk.py
new file mode 100644
index 0000000..d43d5b2
--- /dev/null
+++ b/lang_agent/fs_bkends/statebk.py
@@ -0,0 +1,70 @@
+from dataclasses import dataclass, field, is_dataclass
+from typing import Type, TypedDict, Literal, Dict, List, Tuple, Optional
+import tyro
+import os.path as osp
+from abc import ABC, abstractmethod
+import glob
+from loguru import logger
+
+from deepagents.backends.utils import create_file_data
+from deepagents.backends import StateBackend
+
+from lang_agent.config import InstantiateConfig
+from lang_agent.fs_bkends import BaseFilesystemBackend
+
+def read_as_utf8(file_path:str):
+    with open(file_path, "r", encoding="utf-8") as f:
+        return f.read()
+
+def build_skill_fs_dict(skill_dir:str, virt_path:str="/skills"):
+    skills_fs = sorted(glob.glob(osp.join(skill_dir, "**/*.md")))
+
+    get_parent = lambda f: osp.basename(osp.dirname(f))
+    build_vert_path = lambda f: osp.join(virt_path, get_parent(f), osp.basename(f))
+
+    skill_fs_dict = {}
+    for skill_f in skills_fs:
+        logger.info(f"loading skill: {skill_f}")
+        skill_fs_dict[build_vert_path(skill_f)] = create_file_data(read_as_utf8(skill_f))
+    return skill_fs_dict
+
+
+@tyro.conf.configure(tyro.conf.SuppressFixed)
+@dataclass
+class StateBkConfig(InstantiateConfig):
+    _target:Type = field(default_factory=lambda:StateBk)
+
+    skills_dir:str = "./assets/skills"
+    """path to directory containing skill files"""
+
+    rt_skills_dir:str = "/skills"
+    """path to directory with skills in runtime directory"""
+
+    def __post_init__(self):
+        err_msg = f"{self.skills_dir} does not exist"
+        assert osp.exists(self.skills_dir), err_msg
+
+
+class StateBk(BaseFilesystemBackend):
+    def __init__(self, config:StateBkConfig):
+        self.config = config
+        self.skills_dict = None
+        self._build_backend()
+    
+    def _build_backend(self):
+        self.skills_dict = build_skill_fs_dict(self.config.skills_dir)
+        self.backend = lambda rt : StateBackend(rt)
+
+    def get_backend(self):
+        return self.backend
+    
+    def _get_rt_skill_dir(self)->List[str]:
+        """get runtime skill dir"""
+        return [self.config.rt_skills_dir]
+
+    def get_inf_inp(self):
+        """get inference input for deepagent"""
+        return {"files":self.skills_dict}
+
+    def get_deepagent_params(self):
+        return {"skills" : self._get_rt_skill_dir()}
\ No newline at end of file