From f31daf1949b8cc30ef3533d8618b07655c001104 Mon Sep 17 00:00:00 2001
From: jinliyl <6469360+jinliyl@users.noreply.github.com>
Date: Wed, 5 Aug 2026 23:17:08 +0800
Subject: [PATCH] Revert "feat(backend): improve workspace support for web
 clients (#417)" (#419)

This reverts commit b00eb0a9ea292924d57915fc42477f0697525b54.
---
 .../agent_wrapper/as_agent_wrapper.py         | 86 +------------------
 reme/config/default.yaml                      | 12 ---
 reme/schema/application_config.py             | 15 +---
 reme/steps/common/chat.py                     | 29 +------
 reme/steps/file_io/list.py                    | 38 ++------
 tests/unit/test_base_agent_wrapper.py         | 36 --------
 tests/unit/test_crud_steps.py                 | 23 -----
 tests/unit/test_workspace_web_steps.py        | 42 ++-------
 8 files changed, 22 insertions(+), 259 deletions(-)

diff --git a/reme/components/agent_wrapper/as_agent_wrapper.py b/reme/components/agent_wrapper/as_agent_wrapper.py
index 7360543c..3b539bf5 100644
--- a/reme/components/agent_wrapper/as_agent_wrapper.py
+++ b/reme/components/agent_wrapper/as_agent_wrapper.py
@@ -123,86 +123,6 @@ class WorkspaceBackend(LocalBackend):
         return ExecResult(exit_code=process.returncode or 0, stdout=stdout, stderr=stderr)
 
 
-class WorkspaceRead(Read):
-    """AgentScope Read accepting paths relative to the configured agent workspace."""
-
-    description = Read.description.replace(
-        "must be an absolute path, not a relative path",
-        "may be absolute or relative to the workspace",
-    )
-    input_schema = {
-        **Read.input_schema,
-        "properties": {
-            **Read.input_schema["properties"],
-            "file_path": {
-                "type": "string",
-                "description": "Absolute path or path relative to the workspace.",
-            },
-        },
-    }
-
-    async def call(
-        self,
-        file_path: str,
-        offset: int = 1,
-        limit: int = 2000,
-        _agent_state: AgentState | None = None,
-    ) -> ToolChunk:
-        """Resolve a workspace-relative path before delegating to AgentScope."""
-        cwd = await self._backend.getcwd()  # pylint: disable=protected-access
-        target = self._backend.abspath(file_path, cwd=cwd)  # pylint: disable=protected-access
-        return await super().call(target, offset, limit, _agent_state)
-
-
-class WorkspaceWrite(Write):
-    """AgentScope Write accepting paths relative to the configured agent workspace."""
-
-    input_schema = {
-        **Write.input_schema,
-        "properties": {
-            **Write.input_schema["properties"],
-            "file_path": {
-                "type": "string",
-                "description": "Absolute path or path relative to the workspace.",
-            },
-        },
-    }
-
-    async def call(self, file_path: str, content: str, _agent_state: AgentState | None = None) -> ToolChunk:
-        """Resolve a workspace-relative path before delegating to AgentScope."""
-        cwd = await self._backend.getcwd()  # pylint: disable=protected-access
-        target = self._backend.abspath(file_path, cwd=cwd)  # pylint: disable=protected-access
-        return await super().call(target, content, _agent_state)
-
-
-class WorkspaceEdit(Edit):
-    """AgentScope Edit accepting paths relative to the configured agent workspace."""
-
-    input_schema = {
-        **Edit.input_schema,
-        "properties": {
-            **Edit.input_schema["properties"],
-            "file_path": {
-                "type": "string",
-                "description": "Absolute path or path relative to the workspace.",
-            },
-        },
-    }
-
-    async def call(
-        self,
-        file_path: str,
-        old_string: str,
-        new_string: str,
-        replace_all: bool = False,
-        _agent_state: AgentState | None = None,
-    ) -> ToolChunk:
-        """Resolve a workspace-relative path before delegating to AgentScope."""
-        cwd = await self._backend.getcwd()  # pylint: disable=protected-access
-        target = self._backend.abspath(file_path, cwd=cwd)  # pylint: disable=protected-access
-        return await super().call(target, old_string, new_string, replace_all, _agent_state)
-
-
 class BypassAnalysisBash(Bash):
     """Bash variant that delegates permission decisions to PermissionEngine.
 
@@ -272,11 +192,11 @@ class AsAgentWrapper(BaseAgentWrapper):
         backend = WorkspaceBackend(cwd, self.bash_environment)
         factories = {
             "bash": lambda: BypassAnalysisBash(cwd=cwd, backend=backend),
-            "edit": lambda: WorkspaceEdit(backend=backend),
+            "edit": lambda: Edit(backend=backend),
             "glob": lambda: Glob(backend=backend),
             "grep": lambda: Grep(backend=backend),
-            "read": lambda: WorkspaceRead(backend=backend),
-            "write": lambda: WorkspaceWrite(backend=backend),
+            "read": lambda: Read(backend=backend),
+            "write": lambda: Write(backend=backend),
         }
         if names is False:
             selected_names = []
diff --git a/reme/config/default.yaml b/reme/config/default.yaml
index 36036b65..30b29f1a 100644
--- a/reme/config/default.yaml
+++ b/reme/config/default.yaml
@@ -1,5 +1,3 @@
-workspace_dir: ~/.copaw/workspaces/default/
-
 service:
   backend: http
 
@@ -505,16 +503,6 @@ jobs:
           type: boolean
           description: "recurse"
           default: false
-        sort_by:
-          type: string
-          enum:
-            - mtime
-          description: "optional ordering; mtime returns most recently modified files first"
-        extensions:
-          type: array
-          items:
-            type: string
-          description: "optional extension allowlist applied before sorting and limiting"
         limit:
           type: integer
           description: "max results"
diff --git a/reme/schema/application_config.py b/reme/schema/application_config.py
index ff1b8697..00a0b286 100644
--- a/reme/schema/application_config.py
+++ b/reme/schema/application_config.py
@@ -1,9 +1,8 @@
 """Application configuration models."""
 
 import os
-from pathlib import Path
 
-from pydantic import BaseModel, ConfigDict, Field, field_validator
+from pydantic import BaseModel, ConfigDict, Field
 
 from ..enumeration import ComponentEnum
 
@@ -33,11 +32,7 @@ class ApplicationConfig(BaseModel):
         default_factory=dict,
         description="Environment variables loaded once at startup and passed to agent subprocesses",
     )
-    workspace_dir: str = Field(
-        default=".reme",
-        description="Workspace root directory for runtime files",
-        validate_default=True,
-    )
+    workspace_dir: str = Field(default=".reme", description="Workspace root directory for runtime files")
     metadata_dir: str = Field(default="metadata", description="Subdirectory for ReMe persistent state")
     session_dir: str = Field(default="session", description="Subdirectory for persisted agent sessions")
     mem_session_dir: str = Field(default="mem_session", description="Subdirectory for persisted agent sessions")
@@ -58,9 +53,3 @@ class ApplicationConfig(BaseModel):
         default_factory=dict,
         description="Component registry keyed by type then name",
     )
-
-    @field_validator("workspace_dir", mode="before")
-    @classmethod
-    def normalize_workspace_dir(cls, value) -> str:
-        """Expand home-relative paths once so every component sees the same absolute workspace."""
-        return str(Path(value).expanduser().resolve(strict=False))
diff --git a/reme/steps/common/chat.py b/reme/steps/common/chat.py
index bf8002de..56f18de1 100644
--- a/reme/steps/common/chat.py
+++ b/reme/steps/common/chat.py
@@ -1,8 +1,5 @@
 """Workspace-aware streaming chat step for the ReMe web interface."""
 
-import datetime
-import zoneinfo
-
 from ..base_step import BaseStep
 from ...components import R
 from ...enumeration import ChunkEnum
@@ -16,25 +13,7 @@ class ChatStep(BaseStep):
 Use the available ReMe tools when workspace facts are needed. Cite workspace-relative file paths
 when referring to notes. Never invent file contents, and do not claim to have changed files because
 this chat intentionally provides read-only tools. Reply in the user's language."""
-    READ_ONLY_TOOLS = ["search", "list", "stat", "traverse"]
-
-    def _system_prompt(self) -> str:
-        """Append request-time environment facts to the configured prompt."""
-        timezone = self.app_context.app_config.timezone if self.app_context is not None else None
-        try:
-            current = datetime.datetime.now(zoneinfo.ZoneInfo(timezone)) if timezone else datetime.datetime.now()
-        except (zoneinfo.ZoneInfoNotFoundError, ValueError):
-            current = datetime.datetime.now()
-
-        assert self.context is not None
-        base_prompt = str(self.context.get("system_prompt") or self.DEFAULT_SYSTEM_PROMPT).rstrip()
-        return (
-            f"{base_prompt}\n\n"
-            "<environment_context>\n"
-            f"Current date: {current.date().isoformat()}\n"
-            f"Current working directory: {self.agent_wrapper.cwd.resolve(strict=False)}\n"
-            "</environment_context>"
-        )
+    READ_ONLY_TOOLS = ["search", "list", "read", "stat", "traverse"]
 
     async def execute(self):
         assert self.context is not None
@@ -47,7 +26,7 @@ this chat intentionally provides read-only tools. Reply in the user's language."
             raise RuntimeError("chat_step requires an agent_wrapper")
 
         wrapper_kwargs = {
-            "system_prompt": self._system_prompt(),
+            "system_prompt": self.context.get("system_prompt") or self.DEFAULT_SYSTEM_PROMPT,
             "job_tools": self.READ_ONLY_TOOLS,
         }
         if session_id := self.context.get("session_id"):
@@ -55,10 +34,6 @@ this chat intentionally provides read-only tools. Reply in the user's language."
 
         parts: list[str] = []
         async for chunk in self.agent_wrapper.reply_stream(query, **wrapper_kwargs):
-            if chunk.chunk_type == ChunkEnum.REPLY_END:
-                answer = "".join(parts).strip()
-                if answer:
-                    chunk.metadata["answer"] = answer
             await self.context.add_stream_chunk(chunk)
             if chunk.chunk_type == ChunkEnum.CONTENT and isinstance(chunk.chunk, str):
                 parts.append(chunk.chunk)
diff --git a/reme/steps/file_io/list.py b/reme/steps/file_io/list.py
index cee573ba..ebacc967 100644
--- a/reme/steps/file_io/list.py
+++ b/reme/steps/file_io/list.py
@@ -8,8 +8,6 @@ Parameters:
     path        — dir to list under (relative to the workspace or absolute). Empty = workspace root.
     limit       — cap on the number of returned items (default 100, must be > 0).
     recursive   — descend into subdirectories. Default False = direct children only.
-    sort_by     — optional ordering; ``mtime`` returns most recently modified files first.
-    extensions  — optional extension allowlist applied before sorting and limiting.
 
 No frontmatter is read. Callers needing frontmatter-based filtering
 should iterate the result and call ``frontmatter_read`` per candidate.
@@ -38,7 +36,7 @@ class ListStep(BaseStep):
         if meta:
             self.context.response.metadata.update(meta)
 
-    def _collect_params(self) -> tuple[str, bool, int, str, frozenset[str]]:
+    def _collect_params(self) -> tuple[str, bool, int]:
         """Read ``path`` / ``recursive`` / ``limit`` from context; coerce permissively."""
         assert self.context is not None
         path = str(self.context.get("path") or "")
@@ -49,37 +47,20 @@ class ListStep(BaseStep):
             limit = int(raw_limit) if raw_limit is not None else DEFAULT_LIMIT
         except (TypeError, ValueError):
             limit = DEFAULT_LIMIT
-        sort_by = str(self.context.get("sort_by") or "")
-        raw_extensions = self.context.get("extensions") or []
-        if isinstance(raw_extensions, str):
-            raw_extensions = raw_extensions.split(",")
-        extensions = frozenset(
-            normalized for value in raw_extensions if (normalized := str(value).strip().lower().lstrip("."))
-        )
-        return path, recursive, limit if limit > 0 else DEFAULT_LIMIT, sort_by, extensions
+        return path, recursive, limit if limit > 0 else DEFAULT_LIMIT
 
     @staticmethod
-    def _walk_files(
-        target_dir: Path,
-        recursive: bool,
-        limit: int,
-        sort_by: str = "",
-        extensions: frozenset[str] = frozenset(),
-    ) -> list[Path]:
-        """Return up to ``limit`` regular files, scanning all entries only when sorting."""
+    def _walk_files(target_dir: Path, recursive: bool, limit: int) -> list[Path]:
+        """Return up to ``limit`` regular files under ``target_dir``; short-circuits at the cap."""
         entries: Iterable[Path] = target_dir.rglob("*") if recursive else target_dir.iterdir()
         files: list[Path] = []
         for entry in entries:
             if not entry.is_file():  # skip dirs, sockets, broken links, etc.
                 continue
-            if extensions and entry.suffix.lower().lstrip(".") not in extensions:
-                continue
             files.append(entry)
-            if sort_by != "mtime" and len(files) >= limit:
+            if len(files) >= limit:
                 break
-        if sort_by == "mtime":
-            files.sort(key=lambda entry: (-entry.stat().st_mtime, entry.as_posix()))
-        return files[:limit]
+        return files
 
     @staticmethod
     def _format_relative(files: list[Path], workspace_dir: Path) -> list[str]:
@@ -94,7 +75,7 @@ class ListStep(BaseStep):
 
     async def execute(self):
         assert self.context is not None
-        path, recursive, limit, sort_by, extensions = self._collect_params()
+        path, recursive, limit = self._collect_params()
         workspace_dir = Path(self.file_store.workspace_path or ".").resolve()
         target_dir, err = resolve_path(workspace_dir, path, allow_empty=True)
         if err or target_dir is None:
@@ -108,10 +89,7 @@ class ListStep(BaseStep):
             self._fail(f"path {target_dir} is not a directory", path=str(target_dir))
             return None
 
-        items = self._format_relative(
-            self._walk_files(target_dir, recursive, limit, sort_by, extensions),
-            workspace_dir,
-        )
+        items = self._format_relative(self._walk_files(target_dir, recursive, limit), workspace_dir)
 
         self.context.response.success = True
         location = path or "."
diff --git a/tests/unit/test_base_agent_wrapper.py b/tests/unit/test_base_agent_wrapper.py
index 53fda2bb..17a1b1fa 100644
--- a/tests/unit/test_base_agent_wrapper.py
+++ b/tests/unit/test_base_agent_wrapper.py
@@ -139,42 +139,6 @@ async def test_agentscope_backend_passes_configured_environment_to_bash(tmp_path
     assert result.stdout == b"configured\n"
 
 
-def test_workspace_dir_expands_user_home(monkeypatch, tmp_path):
-    """Home-relative workspace config is normalized before components consume it."""
-    monkeypatch.setenv("HOME", str(tmp_path))
-
-    context = ApplicationContext(workspace_dir="~/.copaw/workspaces/default")
-
-    assert context.app_config.workspace_dir == str(tmp_path / ".copaw/workspaces/default")
-
-
-@pytest.mark.asyncio
-async def test_agentscope_file_tools_accept_workspace_relative_paths(tmp_path):
-    """Built-in Read/Write/Edit share the workspace-relative path convention used by ReMe jobs."""
-    wrapper = AsAgentWrapper(
-        app_context=ApplicationContext(workspace_dir=str(tmp_path)),
-        as_llm="",
-    )
-    read, write, edit = wrapper._builtin_tools(["read", "write", "edit"])  # pylint: disable=protected-access
-    source = tmp_path / ".reme/daily/note.md"
-    source.parent.mkdir(parents=True)
-    source.write_text("before", encoding="utf-8")
-
-    read_result = await read.call(file_path=".reme/daily/note.md")
-    write_result = await write.call(file_path=".reme/daily/new.md", content="new")
-    edit_result = await edit.call(
-        file_path=".reme/daily/note.md",
-        old_string="before",
-        new_string="after",
-    )
-
-    assert "absolute path" not in str(read_result.content)
-    assert "absolute path" not in str(write_result.content)
-    assert "absolute path" not in str(edit_result.content)
-    assert (tmp_path / ".reme/daily/new.md").read_text(encoding="utf-8") == "new"
-    assert source.read_text(encoding="utf-8") == "after"
-
-
 @pytest.mark.asyncio
 async def test_agentscope_bash_uses_managed_proxy_without_changing_subprocess_environment(tmp_path):
     """AgentScope applies the managed proxy only to its command backend."""
diff --git a/tests/unit/test_crud_steps.py b/tests/unit/test_crud_steps.py
index 0eb4d98e..1132a686 100644
--- a/tests/unit/test_crud_steps.py
+++ b/tests/unit/test_crud_steps.py
@@ -225,29 +225,6 @@ def test_list_respects_limit_and_non_recursive():
     asyncio.run(run())
 
 
-def test_list_can_sort_by_most_recent_modification():
-    """Filtering precedes the limit so unrelated generated files cannot hide recent notes."""
-    with tempfile.TemporaryDirectory() as tmp:
-        root = Path(tmp)
-        older = _seed_md(root, "older.md", "old")
-        newer = _seed_md(root, "newer.md", "new")
-        generated = root / "newest.json"
-        generated.write_text("{}", encoding="utf-8")
-        os.utime(older, (100, 100))
-        os.utime(newer, (200, 200))
-        os.utime(generated, (300, 300))
-
-        files = crud_list.ListStep._walk_files(
-            root,
-            recursive=True,
-            limit=2,
-            sort_by="mtime",
-            extensions=frozenset({"md"}),
-        )
-
-        assert [path.name for path in files] == ["newer.md", "older.md"]
-
-
 # -- download ------------------------------------------------------------
 #
 # DownloadStep lives in reme_cc (the local plugin overlay), not reme
diff --git a/tests/unit/test_workspace_web_steps.py b/tests/unit/test_workspace_web_steps.py
index ad592c2a..7071ce8e 100644
--- a/tests/unit/test_workspace_web_steps.py
+++ b/tests/unit/test_workspace_web_steps.py
@@ -3,7 +3,6 @@
 import asyncio
 import os
 from datetime import datetime
-from zoneinfo import ZoneInfo
 
 from reme.components.agent_wrapper import BaseAgentWrapper
 from reme.components.application_context import ApplicationContext
@@ -18,8 +17,8 @@ from reme.steps.file_io.save import SaveStep
 class _StreamingAgent(BaseAgentWrapper):
     """Minimal agent that records resume/tool arguments and emits rich chunks."""
 
-    def __init__(self, **kwargs):
-        super().__init__(**kwargs)
+    def __init__(self):
+        super().__init__()
         self.reply_kwargs = {}
 
     async def reply(self, inputs, **kwargs) -> dict:
@@ -29,7 +28,6 @@ class _StreamingAgent(BaseAgentWrapper):
         self.reply_kwargs = kwargs
         yield StreamChunk(chunk_type=ChunkEnum.TOOL_CALL, chunk="{}", tool_call_id="tool-1", tool_call_name="search")
         yield StreamChunk(chunk_type=ChunkEnum.CONTENT, chunk="hello", session_id="session-new")
-        yield StreamChunk(chunk_type=ChunkEnum.REPLY_END, chunk="", session_id="session-new")
 
 
 def test_save_step_preserves_complete_markdown(tmp_path):
@@ -115,47 +113,21 @@ def test_save_step_rejects_external_change(tmp_path):
     asyncio.run(run())
 
 
-def test_chat_step_streams_rich_chunks_and_resumes_session(tmp_path):
+def test_chat_step_streams_rich_chunks_and_resumes_session():
     """Web chat keeps StreamChunk metadata and exposes only read-only tools."""
 
     async def run():
-        app_context = ApplicationContext(workspace_dir=str(tmp_path), timezone="Asia/Shanghai")
-        agent = _StreamingAgent(app_context=app_context)
+        agent = _StreamingAgent()
         queue = asyncio.Queue()
         context = RuntimeContext(stream_queue=queue, query="hello", session_id="session-old")
 
-        response = await ChatStep(agent_wrapper=agent, app_context=app_context)(context)
+        response = await ChatStep(agent_wrapper=agent)(context)
 
-        chunks = [await queue.get(), await queue.get(), await queue.get()]
+        chunks = [await queue.get(), await queue.get()]
         assert response.answer == "hello"
         assert chunks[0].tool_call_name == "search"
         assert chunks[1].session_id == "session-new"
-        assert chunks[2].metadata["answer"] == "hello"
         assert agent.reply_kwargs["resume"] == "session-old"
-        assert agent.reply_kwargs["job_tools"] == ["search", "list", "stat", "traverse"]
-        system_prompt = agent.reply_kwargs["system_prompt"]
-        assert f"Current date: {datetime.now(ZoneInfo('Asia/Shanghai')).date().isoformat()}" in system_prompt
-        assert f"Current working directory: {tmp_path.resolve()}" in system_prompt
-
-    asyncio.run(run())
-
-
-def test_chat_step_appends_environment_context_to_system_prompt_override(tmp_path):
-    """A caller prompt override retains request-time date and cwd context."""
-
-    async def run():
-        app_context = ApplicationContext(workspace_dir=str(tmp_path), timezone="Asia/Shanghai")
-        agent = _StreamingAgent(app_context=app_context)
-
-        await ChatStep(agent_wrapper=agent, app_context=app_context)(
-            query="hello",
-            system_prompt="Custom prompt.",
-            stream_queue=asyncio.Queue(),
-        )
-
-        system_prompt = agent.reply_kwargs["system_prompt"]
-        assert system_prompt.startswith("Custom prompt.\n\n<environment_context>")
-        assert "Current date:" in system_prompt
-        assert f"Current working directory: {tmp_path.resolve()}" in system_prompt
+        assert agent.reply_kwargs["job_tools"] == ["search", "list", "read", "stat", "traverse"]
 
     asyncio.run(run())