diff --git a/.env.template b/.env.template
index 08178422..a1219321 100644
--- a/.env.template
+++ b/.env.template
@@ -4,7 +4,7 @@ SAVE_DIR=./saves
 # Sandbox (deerFlow-style provisioner)
 SANDBOX_PROVIDER=provisioner
 SANDBOX_PROVISIONER_URL=http://sandbox-provisioner:8002
-SANDBOX_VIRTUAL_PATH_PREFIX=/home/yuxi/user-data
+SANDBOX_VIRTUAL_PATH_PREFIX=/home/gem/user-data
 SANDBOX_EXEC_TIMEOUT_SECONDS=180
 SANDBOX_MAX_OUTPUT_BYTES=262144
 SANDBOX_KEEPALIVE_INTERVAL_SECONDS=30
diff --git a/backend/package/yuxi/agents/backends/composite.py b/backend/package/yuxi/agents/backends/composite.py
index 013563f8..4507bd65 100644
--- a/backend/package/yuxi/agents/backends/composite.py
+++ b/backend/package/yuxi/agents/backends/composite.py
@@ -110,6 +110,6 @@ def create_agent_composite_backend(runtime) -> CompositeBackend:
         default=ProvisionerSandboxBackend(thread_id=thread_id, visible_skills=visible_skills),
         routes={
             "/skills/": SelectedSkillsReadonlyBackend(selected_slugs=visible_skills),
-            "/home/yuxi/kbs/": KnowledgeBaseReadonlyBackend(visible_kbs=visible_kbs),
+            "/home/gem/kbs/": KnowledgeBaseReadonlyBackend(visible_kbs=visible_kbs),
         },
     )
diff --git a/backend/package/yuxi/agents/backends/knowledge_base_backend.py b/backend/package/yuxi/agents/backends/knowledge_base_backend.py
index d761cc72..72f8eacf 100644
--- a/backend/package/yuxi/agents/backends/knowledge_base_backend.py
+++ b/backend/package/yuxi/agents/backends/knowledge_base_backend.py
@@ -15,7 +15,7 @@ from yuxi import knowledge_base
 from yuxi.knowledge.utils.kb_utils import is_minio_url, parse_minio_url
 from yuxi.storage.minio import get_minio_client
 
-KBS_PATH = "/home/yuxi/kbs"
+KBS_PATH = "/home/gem/kbs"
 _INVALID_SEGMENT_RE = re.compile(r"[\\/\x00-\x1f\x7f]+")
 _WHITESPACE_RE = re.compile(r"\s+")
 
diff --git a/backend/package/yuxi/agents/backends/sandbox/__init__.py b/backend/package/yuxi/agents/backends/sandbox/__init__.py
index 1291df9d..e6ca900d 100644
--- a/backend/package/yuxi/agents/backends/sandbox/__init__.py
+++ b/backend/package/yuxi/agents/backends/sandbox/__init__.py
@@ -28,7 +28,7 @@ SandboxInfo = SandboxConnection
 
 # Sandbox-visible paths for viewer/filesystem services.
 USER_DATA_PATH = VIRTUAL_PATH_PREFIX
-SKILLS_PATH = "/home/yuxi/skills"
+SKILLS_PATH = "/home/gem/skills"
 
 # Relative host-side directory names under thread user-data.
 WORKSPACE_DIR = "workspace"
diff --git a/backend/package/yuxi/agents/backends/sandbox/paths.py b/backend/package/yuxi/agents/backends/sandbox/paths.py
index 64f8d621..12f3cb01 100644
--- a/backend/package/yuxi/agents/backends/sandbox/paths.py
+++ b/backend/package/yuxi/agents/backends/sandbox/paths.py
@@ -5,7 +5,7 @@ from pathlib import Path
 
 from yuxi import config as conf
 
-DEFAULT_VIRTUAL_PATH_PREFIX = "/home/yuxi/user-data"
+DEFAULT_VIRTUAL_PATH_PREFIX = "/home/gem/user-data"
 VIRTUAL_PATH_PREFIX = DEFAULT_VIRTUAL_PATH_PREFIX
 
 _SAFE_THREAD_ID_RE = re.compile(r"^[A-Za-z0-9_-]+$")
diff --git a/backend/package/yuxi/agents/buildin/chatbot/prompt.py b/backend/package/yuxi/agents/buildin/chatbot/prompt.py
index 05c0432e..3a05051a 100644
--- a/backend/package/yuxi/agents/buildin/chatbot/prompt.py
+++ b/backend/package/yuxi/agents/buildin/chatbot/prompt.py
@@ -2,10 +2,10 @@ PROMPT = """
 你是一个人工智能助手 “语析”，专门用来回答用户的问题。请根据用户提供的信息，尽可能详细地回答问题。
 如果你不确定答案，可以说你不知道，但请尽量提供相关的信息或建议。请保持礼貌和专业。
 
-允许的写入路径为 /home/yuxi/user-data/，请将需要保存的文件写入该目录下。
+允许的写入路径为 /home/gem/user-data/，请将需要保存的文件写入该目录下。
 推荐使用的路径：
-- /home/yuxi/user-data/workspace/：用于存放工作文件和中间结果
-- /home/yuxi/user-data/outputs/：用于存放最终输出结果
-- /home/yuxi/user-data/uploads/：用于存放用户上传的文件
+- /home/gem/user-data/workspace/：用于存放工作文件和中间结果
+- /home/gem/user-data/outputs/：用于存放最终输出结果
+- /home/gem/user-data/uploads/：用于存放用户上传的文件
 
 """
diff --git a/backend/package/yuxi/agents/middlewares/skills_middleware.py b/backend/package/yuxi/agents/middlewares/skills_middleware.py
index fb5097eb..a308ab38 100644
--- a/backend/package/yuxi/agents/middlewares/skills_middleware.py
+++ b/backend/package/yuxi/agents/middlewares/skills_middleware.py
@@ -60,7 +60,7 @@ async def get_prompt_metadata(db: AsyncSession | None = None) -> dict[str, Skill
         item.slug: {
             "name": item.name,
             "description": item.description,
-            "path": f"/home/yuxi/skills/{item.slug}/SKILL.md",
+            "path": f"/home/gem/skills/{item.slug}/SKILL.md",
         }
         for item in skills
     }
@@ -165,12 +165,12 @@ class SkillsMiddleware(AgentMiddleware):
         Args:
             skills_context_name: 上下文中的 skills 列表字段名称（默认 "skills"）
             enable_skills_prompt: 是否启用 skills 提示段注入（默认 True）
-            skills_sources_for_prompt: skills 来源路径（用于提示词展示，默认 ["/home/yuxi/skills/"]）
+            skills_sources_for_prompt: skills 来源路径（用于提示词展示，默认 ["/home/gem/skills/"]）
         """
         super().__init__()
         self.skills_context_name = skills_context_name
         self.enable_skills_prompt = enable_skills_prompt
-        self.skills_sources_for_prompt = skills_sources_for_prompt or ["/home/yuxi/skills/"]
+        self.skills_sources_for_prompt = skills_sources_for_prompt or ["/home/gem/skills/"]
 
     async def abefore_agent(self, state: SkillsState, runtime) -> dict[str, Any] | None:
         """在 agent 执行前注入 skills 提示词"""
@@ -405,7 +405,7 @@ class SkillsMiddleware(AgentMiddleware):
         pure = PurePosixPath(raw if raw.startswith("/") else f"/{raw}")
         parts = [p for p in pure.parts if p not in ("/", "")]
         slug: str | None = None
-        if len(parts) == 5 and parts[0] == "home" and parts[1] == "yuxi" and parts[2] == "skills" and parts[4] == "SKILL.md":
+        if len(parts) == 5 and parts[0] == "home" and parts[1] == "gem" and parts[2] == "skills" and parts[4] == "SKILL.md":
             slug = parts[3]
 
         if not is_valid_skill_slug(slug):
diff --git a/backend/package/yuxi/config/app.py b/backend/package/yuxi/config/app.py
index 2ac562d6..85412c63 100644
--- a/backend/package/yuxi/config/app.py
+++ b/backend/package/yuxi/config/app.py
@@ -79,7 +79,7 @@ class Config(BaseModel):
     # ============================================================
     sandbox_provider: str = Field(default="provisioner", description="沙箱提供者")
     sandbox_provisioner_url: str = Field(default="http://sandbox-provisioner:8002", description="沙箱服务地址")
-    sandbox_virtual_path_prefix: str = Field(default="/home/yuxi/user-data", description="沙箱用户目录前缀")
+    sandbox_virtual_path_prefix: str = Field(default="/home/gem/user-data", description="沙箱用户目录前缀")
     sandbox_exec_timeout_seconds: int = Field(default=180, description="沙箱执行超时时间（秒）")
     sandbox_max_output_bytes: int = Field(default=262144, description="沙箱最大输出字节数")
     sandbox_keepalive_interval_seconds: int = Field(default=30, description="沙箱保活间隔（秒）")
@@ -250,7 +250,7 @@ class Config(BaseModel):
             os.getenv("SANDBOX_PROVISIONER_URL") or self.sandbox_provisioner_url or "http://sandbox-provisioner:8002"
         ).strip()
         self.sandbox_virtual_path_prefix = (
-            os.getenv("SANDBOX_VIRTUAL_PATH_PREFIX") or self.sandbox_virtual_path_prefix or "/home/yuxi/user-data"
+            os.getenv("SANDBOX_VIRTUAL_PATH_PREFIX") or self.sandbox_virtual_path_prefix or "/home/gem/user-data"
         ).strip()
         self.sandbox_exec_timeout_seconds = int(
             os.getenv("SANDBOX_EXEC_TIMEOUT_SECONDS") or self.sandbox_exec_timeout_seconds or 180
diff --git a/backend/package/yuxi/services/conversation_service.py b/backend/package/yuxi/services/conversation_service.py
index 8415c378..bf066505 100644
--- a/backend/package/yuxi/services/conversation_service.py
+++ b/backend/package/yuxi/services/conversation_service.py
@@ -13,7 +13,7 @@ from yuxi.agents.backends.sandbox import (
 )
 from yuxi.services.doc_converter import ATTACHMENT_ALLOWED_EXTENSIONS, MAX_ATTACHMENT_SIZE_BYTES
 
-UPLOADS_VIRTUAL_PREFIX = "/home/yuxi/user-data/uploads"
+UPLOADS_VIRTUAL_PREFIX = "/home/gem/user-data/uploads"
 from yuxi.agents.buildin import agent_manager
 from yuxi.config import config as app_config
 from yuxi.plugins.parser import Parser
@@ -132,7 +132,7 @@ def _make_attachment_path(file_name: str) -> str:
 def _build_attachment_storage_path(*, user_id: str, thread_id: str, file_name: str) -> tuple[str, Path]:
     """返回附件虚拟路径和宿主机落盘路径。"""
     relative_name = _make_attachment_path(file_name)
-    virtual_path = f"/home/yuxi/user-data/uploads/attachments/{relative_name}"
+    virtual_path = f"/home/gem/user-data/uploads/attachments/{relative_name}"
 
     host_dir = Path(app_config.save_dir) / "threads" / thread_id / "user-data" / "uploads" / "attachments"
     host_dir.mkdir(parents=True, exist_ok=True)
diff --git a/backend/package/yuxi/services/knowledge_fs_service.py b/backend/package/yuxi/services/knowledge_fs_service.py
new file mode 100644
index 00000000..ca8a3a98
--- /dev/null
+++ b/backend/package/yuxi/services/knowledge_fs_service.py
@@ -0,0 +1,171 @@
+from __future__ import annotations
+
+import hashlib
+import json
+import re
+import tempfile
+from pathlib import Path
+from typing import Any
+
+from yuxi.config import config
+from yuxi.knowledge import knowledge_base
+from yuxi.knowledge.utils.kb_utils import parse_minio_url
+from yuxi.repositories.knowledge_file_repository import KnowledgeFileRepository
+from yuxi.storage.minio import get_minio_client
+
+KBS_PATH = "/home/gem/kbs"
+PARSED_DIR_NAME = "parsed"
+_INVALID_MOUNT_NAME_CHARS = re.compile(r'[\\/:*?"<>|\x00-\x1f]')
+_MULTISPACE = re.compile(r"\s+")
+
+
+def get_kb_cache_root() -> Path:
+    return Path(config.save_dir) / "knowledge_base_data" / "kb-cache"
+
+
+def normalize_knowledge_mount_name(name: str) -> str:
+    normalized = _MULTISPACE.sub(" ", str(name or "").strip())
+    if _INVALID_MOUNT_NAME_CHARS.search(normalized):
+        raise ValueError("知识库名称包含不能映射为目录名的非法字符")
+    normalized = normalized.strip(" .")
+    if not normalized or normalized in {".", ".."}:
+        raise ValueError("知识库名称不能映射为有效目录名")
+    if "/" in normalized or "\\" in normalized:
+        raise ValueError("知识库名称不能包含路径分隔符")
+    return normalized
+
+
+def validate_knowledge_mount_name(name: str) -> str:
+    return normalize_knowledge_mount_name(name)
+
+
+def _normalize_selected_knowledges(selected: list[str] | None) -> list[str]:
+    normalized: list[str] = []
+    seen: set[str] = set()
+    for item in selected or []:
+        if not isinstance(item, str):
+            continue
+        value = item.strip()
+        if not value:
+            continue
+        key = value.casefold()
+        if key in seen:
+            continue
+        seen.add(key)
+        normalized.append(value)
+    return normalized
+
+
+def _derive_parsed_filename(filename: str, file_id: str, used_names: set[str]) -> str:
+    raw_name = (filename or file_id or "file").strip() or file_id or "file"
+    suffix = Path(raw_name).suffix
+    stem = Path(raw_name).name[: -len(suffix)] if suffix else Path(raw_name).name
+    candidate = f"{stem or file_id}.md"
+    lowered = candidate.casefold()
+    if lowered in used_names:
+        candidate = f"{stem or file_id}__{file_id}.md"
+        lowered = candidate.casefold()
+    used_names.add(lowered)
+    return candidate
+
+
+def _serialize_file_record(record) -> dict[str, Any]:
+    return {
+        "file_id": record.file_id,
+        "db_id": record.db_id,
+        "parent_id": record.parent_id,
+        "filename": record.filename,
+        "original_filename": record.original_filename,
+        "file_type": record.file_type,
+        "path": record.path,
+        "minio_url": record.minio_url,
+        "markdown_file": record.markdown_file,
+        "status": record.status,
+        "content_hash": record.content_hash,
+        "file_size": record.file_size,
+        "content_type": record.content_type,
+        "processing_params": record.processing_params,
+        "is_folder": bool(record.is_folder),
+    }
+
+
+async def build_visible_knowledge_mounts(
+    *,
+    user_id: str,
+    selected_knowledges: list[str] | None,
+) -> list[dict[str, Any]]:
+    accessible = (await knowledge_base.get_databases_by_user_id(user_id)).get("databases", [])
+    selected = _normalize_selected_knowledges(selected_knowledges)
+    selected_keys = {item.casefold() for item in selected}
+
+    file_repo = KnowledgeFileRepository()
+    mounts: list[dict[str, Any]] = []
+    used_mount_names: dict[str, str] = {}
+
+    for db in accessible:
+        db_id = str(db.get("db_id") or "").strip()
+        db_name = str(db.get("name") or db_id).strip()
+        if not db_id or not db_name:
+            continue
+        if selected_keys and db_name.casefold() not in selected_keys and db_id.casefold() not in selected_keys:
+            continue
+
+        mount_name = normalize_knowledge_mount_name(db_name)
+        conflict_db_id = used_mount_names.get(mount_name.casefold())
+        if conflict_db_id and conflict_db_id != db_id:
+            raise ValueError(f"知识库名称映射冲突: '{db_name}' -> '{mount_name}'")
+        used_mount_names[mount_name.casefold()] = db_id
+
+        records = await file_repo.list_by_db_id(db_id)
+        mounts.append(
+            {
+                "db_id": db_id,
+                "db_name": db_name,
+                "mount_name": mount_name,
+                "files": [_serialize_file_record(record) for record in records],
+            }
+        )
+
+    mounts.sort(key=lambda item: item["mount_name"].casefold())
+    return mounts
+
+
+
+
+def cache_minio_object(*, source_url: str, metadata: dict[str, Any] | None = None) -> Path:
+    bucket_name, object_name = parse_minio_url(source_url)
+    minio_client = get_minio_client()
+    stat = minio_client.client.stat_object(bucket_name=bucket_name, object_name=object_name)
+    etag = str(getattr(stat, "etag", "") or "")
+    last_modified = getattr(stat, "last_modified", None)
+    version_key = etag or (last_modified.isoformat() if last_modified else "")
+    cache_key = hashlib.sha256(f"{bucket_name}:{object_name}:{version_key}".encode("utf-8")).hexdigest()
+
+    suffix = Path(object_name).suffix
+    objects_root = get_kb_cache_root() / "objects"
+    manifests_root = get_kb_cache_root() / "manifests"
+    objects_root.mkdir(parents=True, exist_ok=True)
+    manifests_root.mkdir(parents=True, exist_ok=True)
+
+    cached_path = objects_root / f"{cache_key}{suffix}"
+    if not cached_path.exists():
+        payload = minio_client.download_file(bucket_name=bucket_name, object_name=object_name)
+        with tempfile.NamedTemporaryFile(dir=objects_root, delete=False) as tmp:
+            tmp.write(payload)
+            tmp_path = Path(tmp.name)
+        tmp_path.replace(cached_path)
+
+    manifest_path = manifests_root / f"{cache_key}.json"
+    if not manifest_path.exists():
+        manifest = {
+            "bucket_name": bucket_name,
+            "object_name": object_name,
+            "etag": etag,
+            "last_modified": last_modified.isoformat() if last_modified else None,
+            "source_url": source_url,
+            "cached_path": str(cached_path),
+            "metadata": metadata or {},
+        }
+        manifest_path.write_text(json.dumps(manifest, ensure_ascii=False, indent=2), encoding="utf-8")
+
+    return cached_path
diff --git a/backend/package/yuxi/services/thread_files_service.py b/backend/package/yuxi/services/thread_files_service.py
index 7c0c9fd8..4be3d01a 100644
--- a/backend/package/yuxi/services/thread_files_service.py
+++ b/backend/package/yuxi/services/thread_files_service.py
@@ -18,7 +18,7 @@ from yuxi.services.conversation_service import require_user_conversation
 
 
 def _get_virtual_root() -> str:
-    prefix = str(getattr(conf, "sandbox_virtual_path_prefix", "/home/yuxi/user-data") or "/home/yuxi/user-data")
+    prefix = str(getattr(conf, "sandbox_virtual_path_prefix", "/home/gem/user-data") or "/home/gem/user-data")
     return "/" + prefix.strip("/")
 
 
diff --git a/backend/server/routers/chat_router.py b/backend/server/routers/chat_router.py
index 19a50956..213a9fe6 100644
--- a/backend/server/routers/chat_router.py
+++ b/backend/server/routers/chat_router.py
@@ -862,7 +862,7 @@ async def delete_thread_attachment(
 @chat.get("/thread/{thread_id}/files", response_model=ThreadFileListResponse)
 async def list_thread_files(
     thread_id: str,
-    path: str = Query("/home/yuxi/user-data"),
+    path: str = Query("/home/gem/user-data"),
     recursive: bool = Query(False),
     db: AsyncSession = Depends(get_db),
     current_user: User = Depends(get_required_user),
diff --git a/backend/test/api/test_agent_bubble_sort_e2e.py b/backend/test/api/test_agent_bubble_sort_e2e.py
index d325ab99..37b150ed 100644
--- a/backend/test/api/test_agent_bubble_sort_e2e.py
+++ b/backend/test/api/test_agent_bubble_sort_e2e.py
@@ -36,8 +36,8 @@ TIMEOUT = httpx.Timeout(300.0, connect=10.0)
 POLL_INTERVAL_SECONDS = float(os.getenv("E2E_RUN_POLL_INTERVAL_SECONDS", "2"))
 RUN_TIMEOUT_SECONDS = int(os.getenv("E2E_RUN_TIMEOUT_SECONDS", "240"))
 
-SCRIPT_PATH = "/home/yuxi/user-data/workspace/bubble_sort.py"
-RESULT_PATH = "/home/yuxi/user-data/outputs/bubble_sort_result.txt"
+SCRIPT_PATH = "/home/gem/user-data/workspace/bubble_sort.py"
+RESULT_PATH = "/home/gem/user-data/outputs/bubble_sort_result.txt"
 EXPECTED_OUTPUT = "[1, 2, 4, 5, 8]"
 
 
@@ -182,7 +182,7 @@ class AgentBubbleSortE2ETester:
         if run.get("status") != "completed":
             raise RuntimeError("run did not complete successfully: " + json.dumps(run, ensure_ascii=False))
 
-        file_entries = await self.list_thread_files("/home/yuxi/user-data")
+        file_entries = await self.list_thread_files("/home/gem/user-data")
         file_paths = {str(entry.get("path") or "") for entry in file_entries}
 
         if SCRIPT_PATH not in file_paths:
diff --git a/backend/test/api/test_viewer_filesystem_e2e.py b/backend/test/api/test_viewer_filesystem_e2e.py
index 55b07265..2e2c3a7c 100644
--- a/backend/test/api/test_viewer_filesystem_e2e.py
+++ b/backend/test/api/test_viewer_filesystem_e2e.py
@@ -110,10 +110,10 @@ class ViewerFilesystemE2ETester:
         assert self.thread_id
         sandbox = _make_sandbox_backend(self.thread_id)
         commands = [
-            "mkdir -p /home/yuxi/user-data/workspace /home/yuxi/user-data/outputs",
-            "printf 'print(42)\\n' > /home/yuxi/user-data/workspace/demo.py",
-            "printf 'root-file\\n' > /home/yuxi/user-data/root_file.txt",
-            "printf 'viewer-output\\n' > /home/yuxi/user-data/outputs/result.txt",
+            "mkdir -p /home/gem/user-data/workspace /home/gem/user-data/outputs",
+            "printf 'print(42)\\n' > /home/gem/user-data/workspace/demo.py",
+            "printf 'root-file\\n' > /home/gem/user-data/root_file.txt",
+            "printf 'viewer-output\\n' > /home/gem/user-data/outputs/result.txt",
         ]
         for command in commands:
             result = await asyncio.to_thread(sandbox.execute, command)
@@ -121,22 +121,22 @@ class ViewerFilesystemE2ETester:
                 raise RuntimeError(f"command failed: {command}\n{result.output}")
 
         root_paths = {str(e.get("path", "")) for e in await self.tree("/")}
-        if "/home/yuxi/user-data/" not in root_paths:
+        if "/home/gem/user-data/" not in root_paths:
             raise RuntimeError(f"viewer root missing user-data: {sorted(root_paths)}")
 
-        user_data_paths = {str(e.get("path", "")) for e in await self.tree("/home/yuxi/user-data")}
-        if "/home/yuxi/user-data/root_file.txt" not in user_data_paths:
+        user_data_paths = {str(e.get("path", "")) for e in await self.tree("/home/gem/user-data")}
+        if "/home/gem/user-data/root_file.txt" not in user_data_paths:
             raise RuntimeError(f"viewer user-data missing root_file.txt: {sorted(user_data_paths)}")
 
-        workspace_paths = {str(e.get("path", "")) for e in await self.tree("/home/yuxi/user-data/workspace")}
-        if "/home/yuxi/user-data/workspace/demo.py" not in workspace_paths:
+        workspace_paths = {str(e.get("path", "")) for e in await self.tree("/home/gem/user-data/workspace")}
+        if "/home/gem/user-data/workspace/demo.py" not in workspace_paths:
             raise RuntimeError(f"viewer workspace missing demo.py: {sorted(workspace_paths)}")
 
-        content = await self.file("/home/yuxi/user-data/workspace/demo.py")
+        content = await self.file("/home/gem/user-data/workspace/demo.py")
         if content != "print(42)\n":
             raise RuntimeError(f"unexpected viewer file content: {content!r}")
 
-        content_disposition, payload = await self.download("/home/yuxi/user-data/outputs/result.txt")
+        content_disposition, payload = await self.download("/home/gem/user-data/outputs/result.txt")
         if "result.txt" not in content_disposition:
             raise RuntimeError(f"unexpected content-disposition: {content_disposition}")
         if payload != b"viewer-output\n":
diff --git a/backend/test/api/test_viewer_filesystem_router.py b/backend/test/api/test_viewer_filesystem_router.py
index ff713808..10a62fce 100644
--- a/backend/test/api/test_viewer_filesystem_router.py
+++ b/backend/test/api/test_viewer_filesystem_router.py
@@ -82,7 +82,7 @@ async def test_viewer_tree_root_lists_user_data_namespace(test_client, standard_
 
     entries = response.json().get("entries", [])
     paths = {entry.get("path") for entry in entries}
-    assert "/home/yuxi/user-data/" in paths
+    assert "/home/gem/user-data/" in paths
 
 
 async def test_viewer_file_returns_raw_content_without_line_numbers(test_client, standard_user):
@@ -143,8 +143,8 @@ async def test_viewer_tree_root_lists_kbs_namespace_when_visible(test_client, st
     async def _fake_list_viewer_filesystem_tree(**kwargs):
         return {
             "entries": [
-                {"path": "/home/yuxi/user-data/", "name": "user-data", "is_dir": True, "size": 0, "modified_at": ""},
-                {"path": "/home/yuxi/kbs/", "name": "kbs", "is_dir": True, "size": 0, "modified_at": ""},
+                {"path": "/home/gem/user-data/", "name": "user-data", "is_dir": True, "size": 0, "modified_at": ""},
+                {"path": "/home/gem/kbs/", "name": "kbs", "is_dir": True, "size": 0, "modified_at": ""},
             ]
         }
 
@@ -164,7 +164,7 @@ async def test_viewer_tree_root_lists_kbs_namespace_when_visible(test_client, st
 
     entries = response.json().get("entries", [])
     paths = {entry.get("path") for entry in entries}
-    assert "/home/yuxi/kbs/" in paths
+    assert "/home/gem/kbs/" in paths
 
 
 async def test_viewer_can_list_and_read_kbs_namespace(test_client, standard_user):
@@ -173,9 +173,9 @@ async def test_viewer_can_list_and_read_kbs_namespace(test_client, standard_user
 
     tree_response = await test_client.get(
         "/api/viewer/filesystem/tree",
-        params={"thread_id": thread_id, "path": "/home/yuxi/kbs"},
+        params={"thread_id": thread_id, "path": "/home/gem/kbs"},
         headers=headers,
     )
     assert tree_response.status_code == 200, tree_response.text
     entries = tree_response.json().get("entries", [])
-    assert any(str(entry.get("path", "")).startswith("/home/yuxi/kbs/") for entry in entries)
+    assert any(str(entry.get("path", "")).startswith("/home/gem/kbs/") for entry in entries)
diff --git a/backend/test/test_chat_stream_attachment_materialize.py b/backend/test/test_chat_stream_attachment_materialize.py
index f021852f..d8191192 100644
--- a/backend/test/test_chat_stream_attachment_materialize.py
+++ b/backend/test/test_chat_stream_attachment_materialize.py
@@ -30,7 +30,7 @@ def test_build_attachment_storage_path_uses_thread_local_uploads_dir(tmp_path: P
         file_name="demo.txt",
     )
 
-    assert virtual_path == "/home/yuxi/user-data/uploads/attachments/demo.md"
+    assert virtual_path == "/home/gem/user-data/uploads/attachments/demo.md"
     assert host_path == tmp_path / "threads" / "t-1" / "user-data" / "uploads" / "attachments" / "demo.md"
 
 
@@ -43,17 +43,17 @@ def test_serialize_attachment_includes_original_file_fields() -> None:
             "file_size": 5,
             "status": "parsed",
             "uploaded_at": "2026-03-25T00:00:00+00:00",
-            "path": "/home/yuxi/user-data/uploads/attachments/demo.md",
-            "artifact_url": "/api/chat/thread/t-1/artifacts/home/yuxi/user-data/uploads/attachments/demo.md",
-            "original_path": "/home/yuxi/user-data/uploads/demo.txt",
-            "original_artifact_url": "/api/chat/thread/t-1/artifacts/home/yuxi/user-data/uploads/demo.txt",
+            "path": "/home/gem/user-data/uploads/attachments/demo.md",
+            "artifact_url": "/api/chat/thread/t-1/artifacts/home/gem/user-data/uploads/attachments/demo.md",
+            "original_path": "/home/gem/user-data/uploads/demo.txt",
+            "original_artifact_url": "/api/chat/thread/t-1/artifacts/home/gem/user-data/uploads/demo.txt",
             "minio_url": None,
         }
     )
 
-    assert serialized["path"] == "/home/yuxi/user-data/uploads/attachments/demo.md"
-    assert serialized["original_path"] == "/home/yuxi/user-data/uploads/demo.txt"
-    assert serialized["original_artifact_url"] == "/api/chat/thread/t-1/artifacts/home/yuxi/user-data/uploads/demo.txt"
+    assert serialized["path"] == "/home/gem/user-data/uploads/attachments/demo.md"
+    assert serialized["original_path"] == "/home/gem/user-data/uploads/demo.txt"
+    assert serialized["original_artifact_url"] == "/api/chat/thread/t-1/artifacts/home/gem/user-data/uploads/demo.txt"
 
 
 @pytest.mark.asyncio
@@ -73,8 +73,8 @@ async def test_materialize_attachment_files_keeps_original_file_when_markdown_co
     )
 
     assert result["status"] == "uploaded"
-    assert result["path"] == "/home/yuxi/user-data/uploads/demo.pdf"
-    assert result["original_path"] == "/home/yuxi/user-data/uploads/demo.pdf"
+    assert result["path"] == "/home/gem/user-data/uploads/demo.pdf"
+    assert result["original_path"] == "/home/gem/user-data/uploads/demo.pdf"
     assert (
         tmp_path / "threads" / "t-1" / "user-data" / "uploads" / "demo.pdf"
     ).read_bytes() == b"%PDF-test"
@@ -109,9 +109,9 @@ async def test_materialize_attachment_files_writes_markdown_copy_when_conversion
     )
 
     assert result["status"] == "parsed"
-    assert result["path"] == "/home/yuxi/user-data/uploads/attachments/demo.md"
-    assert result["original_path"] == "/home/yuxi/user-data/uploads/demo.txt"
-    assert result["file_path"] == "/home/yuxi/user-data/uploads/attachments/demo.md"
+    assert result["path"] == "/home/gem/user-data/uploads/attachments/demo.md"
+    assert result["original_path"] == "/home/gem/user-data/uploads/demo.txt"
+    assert result["file_path"] == "/home/gem/user-data/uploads/attachments/demo.md"
     assert result["markdown"] == "hello\nworld"
     assert (tmp_path / "threads" / "t-1" / "user-data" / "uploads" / "demo.txt").read_bytes() == b"hello"
     assert (
diff --git a/backend/test/test_conversation_service_attachment_state.py b/backend/test/test_conversation_service_attachment_state.py
index c032ef9e..7de31e9b 100644
--- a/backend/test/test_conversation_service_attachment_state.py
+++ b/backend/test/test_conversation_service_attachment_state.py
@@ -67,7 +67,7 @@ async def test_sync_thread_attachment_state_updates_graph(monkeypatch: pytest.Mo
     attachments = [
         {
             "status": "parsed",
-            "path": "/home/yuxi/user-data/uploads/attachments/resume.md",
+            "path": "/home/gem/user-data/uploads/attachments/resume.md",
             "file_name": "resume.md",
             "uploaded_at": "2026-02-20T00:00:00+00:00",
         }
diff --git a/backend/test/test_sandbox_backends.py b/backend/test/test_sandbox_backends.py
index 225733c9..a757881f 100644
--- a/backend/test/test_sandbox_backends.py
+++ b/backend/test/test_sandbox_backends.py
@@ -34,7 +34,7 @@ def test_create_agent_composite_backend_uses_provisioner_default(monkeypatch):
     assert isinstance(backend.default, ProvisionerSandboxBackend)
     assert backend.default._visible_skills == ["reporter"]
     assert "/skills/" in backend.routes
-    assert "/home/yuxi/kbs/" in backend.routes
+    assert "/home/gem/kbs/" in backend.routes
 
 
 def test_create_agent_composite_backend_requires_thread_id():
@@ -44,8 +44,8 @@ def test_create_agent_composite_backend_requires_thread_id():
 
 def test_skills_middleware_extracts_slug_for_new_paths() -> None:
     middleware = SkillsMiddleware()
-    assert middleware.skills_sources_for_prompt == ["/home/yuxi/skills/"]
-    assert middleware._extract_skill_slug_from_skill_md_path("/home/yuxi/skills/demo-skill/SKILL.md") == "demo-skill"
+    assert middleware.skills_sources_for_prompt == ["/home/gem/skills/"]
+    assert middleware._extract_skill_slug_from_skill_md_path("/home/gem/skills/demo-skill/SKILL.md") == "demo-skill"
 
 
 def test_resolve_virtual_path_rejects_outside_prefix():
@@ -55,7 +55,7 @@ def test_resolve_virtual_path_rejects_outside_prefix():
 
 def test_resolve_virtual_path_rejects_path_traversal():
     with pytest.raises(ValueError, match="path traversal"):
-        resolve_virtual_path("thread-1", "/home/yuxi/user-data/../secrets")
+        resolve_virtual_path("thread-1", "/home/gem/user-data/../secrets")
 
 
 def test_sandbox_id_for_thread_is_stable():
@@ -72,9 +72,9 @@ def test_provisioner_read_reports_binary_files(monkeypatch) -> None:
     backend = ProvisionerSandboxBackend(thread_id="thread-1")
     monkeypatch.setattr(backend, "_read_binary", lambda path, offset=0, limit=None: b"\x89PNG\r\n\x1a\n")
 
-    result = backend.read("/home/yuxi/user-data/image.png")
+    result = backend.read("/home/gem/user-data/image.png")
 
-    assert result == "Error: File '/home/yuxi/user-data/image.png' is binary and cannot be rendered as text"
+    assert result == "Error: File '/home/gem/user-data/image.png' is binary and cannot be rendered as text"
 
 
 def test_provisioner_read_reports_invalid_path(monkeypatch) -> None:
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 8671f161..c6c7116c 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -20,7 +20,7 @@ x-api-worker-env: &api-worker-env
   MINIO_URI: ${MINIO_URI:-http://minio:9000}
   SANDBOX_PROVIDER: ${SANDBOX_PROVIDER:-provisioner}
   SANDBOX_PROVISIONER_URL: ${SANDBOX_PROVISIONER_URL:-http://sandbox-provisioner:8002}
-  SANDBOX_VIRTUAL_PATH_PREFIX: ${SANDBOX_VIRTUAL_PATH_PREFIX:-/home/yuxi/user-data}
+  SANDBOX_VIRTUAL_PATH_PREFIX: ${SANDBOX_VIRTUAL_PATH_PREFIX:-/home/gem/user-data}
   SANDBOX_EXEC_TIMEOUT_SECONDS: ${SANDBOX_EXEC_TIMEOUT_SECONDS:-180}
   SANDBOX_MAX_OUTPUT_BYTES: ${SANDBOX_MAX_OUTPUT_BYTES:-262144}
   NO_PROXY: localhost,127.0.0.1,milvus,graph,minio,milvus-etcd,etcd,minio,mineru,paddlex,sandbox-provisioner,api.siliconflow.cn
diff --git a/docker-compose.yml b/docker-compose.yml
index e65e7e54..34d468ce 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -22,7 +22,7 @@ x-api-worker-env: &api-worker-env
   YUXI_DOCKER_API_BASE: ${YUXI_DOCKER_API_BASE:-http://localhost}
   SANDBOX_PROVIDER: ${SANDBOX_PROVIDER:-provisioner}
   SANDBOX_PROVISIONER_URL: ${SANDBOX_PROVISIONER_URL:-http://sandbox-provisioner:8002}
-  SANDBOX_VIRTUAL_PATH_PREFIX: ${SANDBOX_VIRTUAL_PATH_PREFIX:-/home/yuxi/user-data}
+  SANDBOX_VIRTUAL_PATH_PREFIX: ${SANDBOX_VIRTUAL_PATH_PREFIX:-/home/gem/user-data}
   SANDBOX_EXEC_TIMEOUT_SECONDS: ${SANDBOX_EXEC_TIMEOUT_SECONDS:-180}
   SANDBOX_MAX_OUTPUT_BYTES: ${SANDBOX_MAX_OUTPUT_BYTES:-262144}
   # LightRAG
diff --git a/docker/sandbox_provisioner/app.py b/docker/sandbox_provisioner/app.py
index 405a438f..cdb79f69 100644
--- a/docker/sandbox_provisioner/app.py
+++ b/docker/sandbox_provisioner/app.py
@@ -181,7 +181,7 @@ class LocalContainerProvisionerBackend:
         expected_source = str(self._thread_skills_host_path(thread_id))
         for mount in container.attrs.get("Mounts") or []:
             destination = (mount.get("Destination") or "").rstrip("/")
-            if destination != "/home/yuxi/skills":
+            if destination != "/home/gem/skills":
                 continue
             source = str(mount.get("Source") or "").rstrip("/")
             return source == expected_source
@@ -238,9 +238,9 @@ class LocalContainerProvisionerBackend:
     def _ensure_user_data_writable(container) -> None:
         cmd = (
             "sh -lc "
-            '"mkdir -p /home/yuxi/user-data/workspace /home/yuxi/user-data/uploads /home/yuxi/user-data/outputs '
-            '&& chmod a+rwx /home/yuxi/user-data /home/yuxi/user-data/workspace '
-            '/home/yuxi/user-data/uploads /home/yuxi/user-data/outputs"'
+            '"mkdir -p /home/gem/user-data/workspace /home/gem/user-data/uploads /home/gem/user-data/outputs '
+            '&& chmod a+rwx /home/gem/user-data /home/gem/user-data/workspace '
+            '/home/gem/user-data/uploads /home/gem/user-data/outputs"'
         )
         result = container.exec_run(cmd, user="0:0")
         if result.exit_code != 0:
@@ -310,14 +310,14 @@ class LocalContainerProvisionerBackend:
                     "managed-by": "yuxi-sandbox-provisioner",
                 },
                 "volumes": {
-                    str(thread_user_data): {"bind": "/home/yuxi/user-data", "mode": "rw"},
-                    str(thread_skills): {"bind": "/home/yuxi/skills", "mode": "ro"},
+                    str(thread_user_data): {"bind": "/home/gem/user-data", "mode": "rw"},
+                    str(thread_skills): {"bind": "/home/gem/skills", "mode": "ro"},
                 },
                 "ports": {f"{self._container_port}/tcp": None},
                 "security_opt": ["seccomp=unconfined"],
-                # The sandbox image expects /home/yuxi to be writable during boot.
+                # The sandbox image expects /home/gem to be writable during boot.
                 # Keep it ephemeral and mount persistent user-data underneath it.
-                "tmpfs": {"/home/yuxi": "rw,exec,mode=777"},
+                "tmpfs": {"/home/gem": "rw,exec,mode=777"},
             }
             if self._network:
                 run_kwargs["network"] = self._network
@@ -432,7 +432,7 @@ class KubernetesProvisionerBackend:
                         image=self._sandbox_image,
                         command=["sh", "-c"],
                         args=[
-                            "chmod 777 /home/yuxi "
+                            "chmod 777 /home/gem "
                             f"&& mkdir -p /mnt/shared-data/threads/{thread_id}/user-data/workspace "
                             f"/mnt/shared-data/threads/{thread_id}/user-data/uploads "
                             f"/mnt/shared-data/threads/{thread_id}/user-data/outputs "
@@ -440,7 +440,7 @@ class KubernetesProvisionerBackend:
                             f"&& chmod -R 777 /mnt/shared-data/threads/{thread_id}/user-data ",
                         ],
                         volume_mounts=[
-                            self._client.V1VolumeMount(name="home-dir", mount_path="/home/yuxi"),
+                            self._client.V1VolumeMount(name="home-dir", mount_path="/home/gem"),
                             self._client.V1VolumeMount(name="shared-data", mount_path="/mnt/shared-data"),
                         ],
                     ),
@@ -451,15 +451,15 @@ class KubernetesProvisionerBackend:
                         image=self._sandbox_image,
                         ports=[self._client.V1ContainerPort(container_port=self._container_port)],
                         volume_mounts=[
-                            self._client.V1VolumeMount(name="home-dir", mount_path="/home/yuxi"),
+                            self._client.V1VolumeMount(name="home-dir", mount_path="/home/gem"),
                             self._client.V1VolumeMount(
                                 name="shared-data",
-                                mount_path="/home/yuxi/user-data",
+                                mount_path="/home/gem/user-data",
                                 sub_path=f"threads/{thread_id}/user-data",
                             ),
                             self._client.V1VolumeMount(
                                 name="shared-data",
-                                mount_path="/home/yuxi/skills",
+                                mount_path="/home/gem/skills",
                                 sub_path=f"threads/{thread_id}/skills",
                                 read_only=True,
                             ),
diff --git a/docs/agents/agents-config.md b/docs/agents/agents-config.md
index ec72b9a2..571e3b5b 100644
--- a/docs/agents/agents-config.md
+++ b/docs/agents/agents-config.md
@@ -225,7 +225,7 @@ config_json.context + runtime ids -> context_schema instance
   - 在运行期回写 `_visible_skills`
 - 文件系统与沙盒接入
   - 通过 `thread_id` 获取对应沙盒
-  - 通过 `skills` 决定 `/home/yuxi/skills` 的可见范围
+  - 通过 `skills` 决定 `/home/gem/skills` 的可见范围
 
 所以 Context 既是输入配置，也是中间件共享的运行时状态载体。
 
diff --git a/docs/develop-guides/roadmap.md b/docs/develop-guides/roadmap.md
index 5391ca21..933c6f6c 100644
--- a/docs/develop-guides/roadmap.md
+++ b/docs/develop-guides/roadmap.md
@@ -31,7 +31,7 @@
 - 重构后端代码 src -> backend/package/yuxi
 - 重构文档解析，统一文档解析体验，并新增 Parser 类
 - 新增 LITE 模式启动，启动时不加载知识库、知识图谱相关模块，可以使用 make up-lite 快捷启动
-- 新增沙盒环境，详见后续文档更新，统一沙盒虚拟路径前缀默认值为 `/home/yuxi/user-data`
+- 新增沙盒环境，详见后续文档更新，统一沙盒虚拟路径前缀默认值为 `/home/gem/user-data`
 - 新增基于沙盒的文件系统，前端工作台可以查看文件系统，支持预览、下载文件
 - 重构附件系统，直接集成在了沙盒文件系统中，附件上传后直接落盘到沙盒挂载目录
 - 优化前端流式消息体验：新增通用 `useStreamSmoother` 调度层，统一平滑 Agent runs SSE、普通聊天流与审批恢复流中的 `loading` chunk
@@ -45,7 +45,7 @@
 
 ### 修复
 
-- 为沙盒与 viewer 文件系统补齐知识库只读映射：新增 `/home/yuxi/kbs` 命名空间，按“用户可访问知识库 ∩ 当前 Agent 已启用知识库”暴露原始文件与解析后的 Markdown，并补充对应后端与 viewer 路由测试
+- 为沙盒与 viewer 文件系统补齐知识库只读映射：新增 `/home/gem/kbs` 命名空间，按“用户可访问知识库 ∩ 当前 Agent 已启用知识库”暴露原始文件与解析后的 Markdown，并补充对应后端与 viewer 路由测试
 
 <!-- 添加到这里 -->
 
@@ -80,7 +80,7 @@
 - 修改方法备注信息 [#478](https://github.com/xerrors/Yuxi-Know/pull/478)
 - 修复多次 human-in-the-loop 的渲染解析问题 [#453](https://github.com/xerrors/Yuxi-Know/issues/453) [#475](https://github.com/xerrors/Yuxi-Know/pull/475)
 - 修复沙盒后端接入回归：补齐 composite backend 的 `sandbox_backend` 参数、限制 `/api/sandbox/prepare` 仅允许访问当前用户线程、确保 `release()` 之后的 `destroy()` 会真正停止热池容器，并恢复 docker-compose 的完整模式默认值
-- 重构沙盒为 deer-flow 风格的 AIO provider：切换为 thread-local sandbox、统一 `/home/yuxi/user-data/{workspace,uploads,outputs}` 固定路径、移除公开 `/api/sandbox/*` 生命周期接口，并补充 lite 模式下的 provider 生命周期、filesystem API 与 sandbox 复用/隔离 E2E 验证
+- 重构沙盒为 deer-flow 风格的 AIO provider：切换为 thread-local sandbox、统一 `/home/gem/user-data/{workspace,uploads,outputs}` 固定路径、移除公开 `/api/sandbox/*` 生命周期接口，并补充 lite 模式下的 provider 生命周期、filesystem API 与 sandbox 复用/隔离 E2E 验证
 - 调整聊天附件存储链路：线程附件改为直接落盘到 `saves/threads/<thread_id>/user-data/uploads`，解析成功后额外生成 `uploads/attachments/*.md`，不再依赖 MinIO 或显式上传到 sandbox
 - 修复知识库文件列表包体异常膨胀：上传阶段不再把批次级 `content_hashes` 写入每个文件的 `processing_params`，并从数据库详情列表接口中移除该字段，改为按需读取单文件详情
 
diff --git a/web/src/apis/agent_api.js b/web/src/apis/agent_api.js
index 80cd6d32..655cd77b 100644
--- a/web/src/apis/agent_api.js
+++ b/web/src/apis/agent_api.js
@@ -341,7 +341,7 @@ export const threadApi = {
    * @param {boolean} recursive
    * @returns {Promise}
    */
-  listThreadFiles: (threadId, path = '/home/yuxi/user-data', recursive = false) =>
+  listThreadFiles: (threadId, path = '/home/gem/user-data', recursive = false) =>
     apiGet(
       `/api/chat/thread/${threadId}/files?path=${encodeURIComponent(path)}&recursive=${recursive}`
     ),
diff --git a/web/src/components/AgentChatComponent.vue b/web/src/components/AgentChatComponent.vue
index b9246a09..d3cdd83e 100644
--- a/web/src/components/AgentChatComponent.vue
+++ b/web/src/components/AgentChatComponent.vue
@@ -775,7 +775,7 @@ const fetchThreadMessages = async ({ agentId, threadId, delay = 0 }) => {
 const fetchThreadFiles = async (threadId) => {
   if (!threadId) return
   try {
-    const response = await threadApi.listThreadFiles(threadId, '/home/yuxi/user-data', true)
+    const response = await threadApi.listThreadFiles(threadId, '/home/gem/user-data', true)
     const entries = Array.isArray(response?.files) ? response.files : []
     threadFilesMap.value[threadId] = entries
   } catch (error) {