Here's the current dependency layering (simplified, arrows = "depends on"):

```
Layer 0 (leaves, no internal deps):
  types.py
  workspace/cache/entry.py
  backend/base.py

Layer 1:
  workspace/cache/store.py     → cache/entry
  workspace/sync.py            → backend/base, types
  workspace/consistency.py     → backend/base, types, cache/entry

Layer 2:
  workspace/mount.py           → backend/base, types, consistency

Layer 3:
  workspace/workspace.py       → backend/base, types, cache, consistency, mount, sync

Layer 4:
  workspace/__init__.py        → workspace/workspace  (re-export only)
  server/service/session.py    → commands.custom.registry, fuse.registry, types, workspace
  server/service/base.py       → types

Layer 5:
  server/service/local.py      → backend.loader, cli.config, commands, fuse, observe,
                                  runtime.base, service.base, service.cache,
                                  service.session, types, workspace, workspace.consistency

Layer 6:
  server/fastapi/app.py        → server/service/local + routers
```

**Key observations:**
- `types.py` and `cache/entry.py` are true leaf nodes
- `consistency.py` is now cleanly separate (Layer 1) — available to anything above without circular risk
- `session.py` (new) sits at Layer 4 — only `local.py` depends on it
- `local.py` is the highest-complexity node (15 imports), which is expected for the service orchestrator
- `server/fastapi/app.py` depends only on `local.py` — clean top layer


Map the top-level import dependencies between modules in /Users/agent/strukto/mirage/mirage/. Read the first ~30 lines (imports section) of these key files and report what each imports from other mirage modules:

- mirage/types.py
- mirage/workspace/consistency.py
- mirage/workspace/cache/entry.py
- mirage/workspace/cache/store.py
- mirage/workspace/mount.py
- mirage/workspace/workspace.py
- mirage/workspace/__init__.py
- mirage/workspace/sync.py
- mirage/server/service/session.py
- mirage/server/service/base.py
- mirage/server/service/local.py
- mirage/server/fastapi/app.py
- mirage/server/fastapi/config.py
- mirage/observe/inspector.py
- mirage/runtime/base.py
- mirage/commands/__init__.py
- mirage/fuse/__init__.py

For each file, list only the `from mirage.X import ...` lines. Output as a simple list: "FILE → [dep1, dep2, ...]"

Prompt:
Map the top-level import dependencies between modules in /Users/agent/strukto/mirage/mirage/. Read the first ~30 lines (imports section) of these key files and report what each imports from other mirage modules:

- mirage/types.py
- mirage/workspace/consistency.py
- mirage/workspace/cache/entry.py
- mirage/workspace/cache/store.py
- mirage/workspace/mount.py
- mirage/workspace/workspace.py
- mirage/workspace/__init__.py
- mirage/workspace/sync.py
- mirage/server/service/session.py
- mirage/server/service/base.py
- mirage/server/service/local.py
- mirage/server/fastapi/app.py
- mirage/server/fastapi/config.py
- mirage/observe/inspector.py
- mirage/runtime/base.py
- mirage/commands/__init__.py
- mirage/fuse/__init__.py

For each file, list only the `from mirage.X import ...` lines. Output as a simple list: "FILE → [dep1, dep2, ...]"


     1→from enum import Enum
     2→
     3→from pydantic import BaseModel, ConfigDict, Field
     4→
     5→
     6→class FileType(str, Enum):
     7→    DIRECTORY = "directory"
     8→    TEXT = "text"
     9→    BINARY = "binary"
    10→    JSON = "json"
    11→    CSV = "csv"
    12→    IMAGE_PNG = "image/png"
    13→    IMAGE_JPEG = "image/jpeg"
    14→    IMAGE_GIF = "image/gif"
    15→    ZIP = "application/zip"
    16→    GZIP = "application/gzip"
    17→    PDF = "application/pdf"
    18→
    19→
    20→class CostLevel(str, Enum):
    21→    CHEAP = "cheap"
    22→    PARTIAL = "partial"
    23→    EXPENSIVE = "expensive"
    24→    NETWORK = "network"
    25→
    26→
    27→class FileStat(BaseModel):
    28→    model_config = ConfigDict(frozen=True)
    29→
    30→    name: str

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→import time
     2→from enum import Enum
     3→
     4→from mirage.backend.base import BaseBackend
     5→from mirage.types import FileStat
     6→from mirage.workspace.cache.entry import CacheEntry
     7→
     8→
     9→class ConsistencyPolicy(str, Enum):
    10→    CACHED = "cached"
    11→    LAZY = "lazy"
    12→    TTL = "ttl"
    13→    ALWAYS = "always"
    14→
    15→
    16→def is_fresh(
    17→    entry: CacheEntry,
    18→    consistency: ConsistencyPolicy,
    19→    ttl_seconds: int,
    20→    backend: BaseBackend,
    21→    backend_path: str,
    22→) -> tuple[bool, FileStat | None]:
    23→    if consistency == ConsistencyPolicy.CACHED:
    24→        return True, None
    25→    if consistency == ConsistencyPolicy.ALWAYS:
    26→        return False, None
    27→    if consistency == ConsistencyPolicy.TTL:
    28→        if (time.time() - entry.cached_at) < ttl_seconds:
    29→            return True, None
    30→    try:

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→from pydantic import BaseModel
     2→
     3→
     4→class CacheEntry(BaseModel):
     5→    data: bytes
     6→    cached_at: float
     7→    etag: str | None = None
     8→    modified: str | None = None
     9→    size: int | None = None
    10→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→import time
     2→from collections import OrderedDict
     3→
     4→from mirage.workspace.cache.entry import CacheEntry
     5→
     6→
     7→def _parse_limit(limit: str | int) -> int:
     8→    if isinstance(limit, int):
     9→        return limit
    10→    s = limit.strip().upper()
    11→    for suffix, mult in [("GB", 1 << 30), ("MB", 1 << 20), ("KB", 1 << 10)]:
    12→        if s.endswith(suffix):
    13→            return int(s[:-len(suffix)]) * mult
    14→    return int(s)
    15→
    16→
    17→class LRUCache:
    18→
    19→    def __init__(self, limit: str | int = "512MB") -> None:
    20→        self._limit = _parse_limit(limit)
    21→        self._store: OrderedDict[str, CacheEntry] = OrderedDict()
    22→        self._size = 0
    23→
    24→    def get(self, path: str) -> CacheEntry | None:
    25→        if path not in self._store:
    26→            return None
    27→        self._store.move_to_end(path)
    28→        return self._store[path]
    29→
    30→    def put(self,

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→from mirage.backend.base import BaseBackend
     2→from mirage.types import MountMode
     3→from mirage.workspace.consistency import ConsistencyPolicy
     4→
     5→
     6→class Mount:
     7→
     8→    def __init__(
     9→            self,
    10→            prefix: str,
    11→            backend: BaseBackend,
    12→            mode: MountMode = MountMode.READ,
    13→            consistency: ConsistencyPolicy = ConsistencyPolicy.CACHED) -> None:
    14→        stripped = prefix.strip("/")
    15→        self.prefix = "/" + stripped + "/" if stripped else "/"
    16→        self.backend = backend
    17→        self.mode = mode
    18→        self.consistency = consistency
    19→
    20→
    21→class MountRegistry:
    22→    """
    23→    Longest-prefix-match router.
    24→
    25→    Given a virtual path like "/s3-prod/data/file.json", resolves to the
    26→    backend mounted at "/s3-prod/" and returns the stripped path
    27→    "/data/file.json".
    28→    """
    29→
    30→    def __init__(self) -> None:

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→from __future__ import annotations
     2→
     3→import time
     4→
     5→from mirage.backend.base import BaseBackend
     6→from mirage.backend.filetype import guess_type
     7→from mirage.types import (FileStat, Inode, MountMode, SyncPolicy, SyncResult,
     8→                          TransferStats)
     9→from mirage.workspace.cache import LRUCache
    10→from mirage.workspace.consistency import ConsistencyPolicy, is_fresh
    11→from mirage.workspace.mount import MountRegistry
    12→from mirage.workspace.sync import DirtyTracker
    13→
    14→
    15→class _PathLock:
    16→
    17→    def __init__(self, ws: Workspace, paths: list[str]) -> None:
    18→        self._ws = ws
    19→        self._paths = paths
    20→
    21→    def __enter__(self) -> _PathLock:
    22→        return self
    23→
    24→    def __exit__(self, *_: object) -> None:
    25→        self._ws.unlock_paths(self._paths)
    26→
    27→
    28→class Workspace:
    29→    """
    30→    Unified virtual filesystem over heterogeneous backends.

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→from mirage.workspace.workspace import Workspace
     2→
     3→__all__ = ["Workspace"]
     4→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→import hashlib
     2→import time
     3→
     4→from mirage.backend.base import BaseBackend
     5→from mirage.types import Inode, SyncResult
     6→
     7→
     8→class DirtyTracker:
     9→    """
    10→    Tracks which virtual paths have local changes that haven't been synced
    11→    to their backing backend.
    12→
    13→    Lifecycle:
    14→        on_read()  — record baseline remote checksum (not dirty)
    15→        on_write() — update local checksum, mark dirty=True
    16→        on_sync()  — upload to backend, clear dirty flag
    17→    """
    18→
    19→    def __init__(self) -> None:
    20→        self._inodes: dict[str, Inode] = {}
    21→
    22→    # ── event hooks ─────────────────────────────────────────────────────────
    23→
    24→    def on_read(self, path: str, data: bytes, mount: str) -> None:
    25→        checksum = _md5(data)
    26→        if path in self._inodes:
    27→            inode = self._inodes[path]
    28→            inode.remote_checksum = checksum
    29→            inode.checksum = checksum
    30→            inode.size = len(data)

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→import os
     2→import signal
     3→import subprocess
     4→import sys
     5→import time
     6→
     7→from pydantic import BaseModel, ConfigDict, Field
     8→
     9→from mirage.commands.custom.registry import CommandRegistry
    10→from mirage.fuse.registry import FuseOpRegistry
    11→from mirage.types import CommandStats, MountMode, RuntimeType
    12→from mirage.workspace import Workspace
    13→
    14→
    15→class WorkspaceSession(BaseModel):
    16→    model_config = ConfigDict(arbitrary_types_allowed=True)
    17→
    18→    id: str
    19→    ws: Workspace | None
    20→    registry: CommandRegistry | None
    21→    cwd: str = "/"
    22→    fuse_mounted: bool = False
    23→    mode: MountMode = MountMode.WRITE
    24→    mountpoint: str | None = None
    25→    pid: int | None = None
    26→    mounts: list[dict] = Field(default_factory=list)
    27→    runtime_type: RuntimeType | None = None
    28→    fuse_registry: FuseOpRegistry = Field(default_factory=FuseOpRegistry)
    29→    command_stats: CommandStats = Field(default_factory=CommandStats)
    30→    created_at: float = Field(default_factory=time.time)

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→from abc import ABC, abstractmethod
     2→
     3→from mirage.types import FileStat
     4→
     5→
     6→class MirageService(ABC):
     7→
     8→    @abstractmethod
     9→    def create_workspace(self, config: dict) -> str:
    10→        ...
    11→
    12→    @abstractmethod
    13→    def delete_workspace(self, ws_id: str) -> None:
    14→        ...
    15→
    16→    @abstractmethod
    17→    def list_workspaces(self) -> list[dict]:
    18→        ...
    19→
    20→    @abstractmethod
    21→    def exec(
    22→        self,
    23→        ws_id: str,
    24→        command: str,
    25→        cwd: str | None = None,
    26→        stdin: bytes | None = None,
    27→        input_files: dict[str, tuple[str, bytes | None]] | None = None,
    28→    ) -> tuple[bool, str, dict[str, bytes] | None, dict[str, str] | None]:
    29→        ...
    30→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→import time
     2→import uuid
     3→from datetime import datetime, timezone
     4→
     5→from mirage.backend.loader import load_backend_class
     6→from mirage.cli.config import parse_mount_uri, split_mount_spec
     7→from mirage.commands import COMMANDS, _resolve
     8→from mirage.commands.builtin import nav
     9→from mirage.commands.custom.registry import CommandRegistry, ExternalCommand
    10→from mirage.fuse import FUSE_OPS
    11→from mirage.fuse.loader import build_registry_from_config, load_fuse_op_class
    12→from mirage.observe.entries import (CommandEntry, CommandResult, DispatchInfo,
    13→                                    ParsedCommand, SessionEntry, WorkspaceInfo)
    14→from mirage.observe.session_log import get_or_create_log
    15→from mirage.runtime.base import _BLOCKED, CommandNotAllowedError
    16→from mirage.server.service.base import MirageService
    17→from mirage.server.service.cache import FileCache
    18→from mirage.server.service.session import WorkspaceSession, _unmount_fuse
    19→from mirage.types import (FileStat, MountMode, RuntimeType, SyncPolicy)
    20→from mirage.workspace import Workspace
    21→from mirage.workspace.consistency import ConsistencyPolicy
    22→
    23→
    24→class LocalService(MirageService):
    25→
    26→    def __init__(self) -> None:
    27→        self._sessions: dict[str, WorkspaceSession] = {}
    28→        self._file_cache = FileCache()
    29→
    30→    def _get_session(self, ws_id: str) -> WorkspaceSession:

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→from fastapi import FastAPI
     2→
     3→from mirage.observe.fastapi.router import observe_router
     4→from mirage.server.fastapi.routers.command_router import command_router
     5→from mirage.server.fastapi.routers.io_router import io_router
     6→from mirage.server.fastapi.routers.workspace_router import workspace_router
     7→from mirage.server.service.local import LocalService
     8→
     9→app = FastAPI(title="Mirage Server")
    10→service = LocalService()
    11→app.state.service = service
    12→
    13→app.include_router(workspace_router)
    14→app.include_router(command_router)
    15→app.include_router(io_router)
    16→app.include_router(observe_router)
    17→
    18→_sessions = service._sessions
    19→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→from pydantic import BaseModel
     2→
     3→from mirage.types import MountMode, SyncPolicy
     4→from mirage.workspace.consistency import ConsistencyPolicy
     5→
     6→
     7→class MountConfig(BaseModel):
     8→    uri: str | None = None
     9→    backend: str | None = None
    10→    args: dict[str, str] | None = None
    11→    mode: MountMode | None = None
    12→    consistency: ConsistencyPolicy = ConsistencyPolicy.CACHED
    13→
    14→
    15→class CreateWorkspaceRequest(BaseModel):
    16→    mounts: dict[str, str | MountConfig]
    17→    sync_policy: SyncPolicy = SyncPolicy.STAGED
    18→    mode: MountMode = MountMode.WRITE
    19→    consistency: ConsistencyPolicy = ConsistencyPolicy.CACHED
    20→    ttl_seconds: int = 300
    21→    runtime: str | None = None
    22→    fuse_ops: dict[str, str] | None = None
    23→
    24→
    25→class RegisterFuseRequest(BaseModel):
    26→    mountpoint: str
    27→    pid: int
    28→    mount_specs: list[str] = []
    29→    runtime: str | None = None
    30→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→import os
     2→import resource
     3→import time
     4→from typing import TYPE_CHECKING, Any
     5→
     6→from mirage.backend.local.memory import MemoryBackend
     7→from mirage.commands import COMMAND_COST, COMMANDS
     8→from mirage.types import CostLevel
     9→
    10→if TYPE_CHECKING:
    11→    from mirage.workspace import Workspace
    12→
    13→_server_start_time: float = 0.0
    14→
    15→
    16→def _count_dirty(ws: "Workspace") -> int:
    17→    memory_mounts = {
    18→        m.prefix
    19→        for m in ws._registry.mounts() if isinstance(m.backend, MemoryBackend)
    20→    }
    21→    return len([
    22→        i for i in ws._tracker.dirty() if i.backend_mount not in memory_mounts
    23→    ])
    24→
    25→
    26→def set_server_start_time(t: float) -> None:
    27→    global _server_start_time
    28→    _server_start_time = t
    29→
    30→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→import os
     2→import shlex
     3→import uuid
     4→
     5→from mirage.commands import _resolve
     6→from mirage.commands.builtin import nav
     7→from mirage.commands.custom.registry import CommandRegistry
     8→from mirage.fuse.registry import FuseOpRegistry
     9→from mirage.runtime.accessors.base import (CommandsAccessor, FuseOpsAccessor,
    10→                                           WorkspaceOpsAccessor)
    11→from mirage.runtime.accessors.local import (LocalCommandsAccessor,
    12→                                            LocalFuseOpsAccessor,
    13→                                            LocalWorkspaceOpsAccessor)
    14→from mirage.workspace import Workspace
    15→
    16→_ENV_AGENT_ID = "MIRAGE_AGENT_ID"
    17→
    18→_BLOCKED = {
    19→    "python",
    20→    "python3",
    21→    "node",
    22→    "npm",
    23→    "npx",
    24→    "ruby",
    25→    "perl",
    26→    "php",
    27→    "bash",
    28→    "sh",
    29→    "zsh",
    30→    "fish",

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→from mirage.commands.builtin.handlers import COMMAND_COST, COMMANDS, _resolve
     2→
     3→__all__ = ["COMMANDS", "COMMAND_COST", "_resolve"]
     4→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


     1→from mirage.fuse.backend.default import DefaultFuseOp
     2→from mirage.fuse.backend.local.local import LocalFuseOp
     3→from mirage.fuse.backend.local.memory import MemoryFuseOp
     4→from mirage.fuse.backend.object_storage.s3 import S3FuseOp
     5→from mirage.fuse.base import FuseOp
     6→from mirage.fuse.filetype.csv import CsvFuseOp
     7→from mirage.fuse.filetype.parquet import ParquetFuseOp
     8→
     9→FUSE_OPS: dict[str, FuseOp] = {
    10→    "default": DefaultFuseOp(),
    11→    "s3": S3FuseOp(),
    12→    "memory": MemoryFuseOp(),
    13→    "local": LocalFuseOp(),
    14→    "parquet": ParquetFuseOp(),
    15→    "csv": CsvFuseOp(),
    16→}
    17→
    18→__all__ = [
    19→    "FuseOp",
    20→    "CsvFuseOp",
    21→    "DefaultFuseOp",
    22→    "LocalFuseOp",
    23→    "MemoryFuseOp",
    24→    "ParquetFuseOp",
    25→    "S3FuseOp",
    26→    "FUSE_OPS",
    27→]
    28→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


So any suggestions?


The user is asking for suggestions on what to refactor or improve next. Let me think about this based on what I know about the codebase from the session.

Current state after all the work done:
1. `ConsistencyPolicy` moved to `workspace/consistency.py` ✓
2. `Workspace` moved to `workspace/workspace.py` ✓
3. `WorkspaceSession` + `_unmount_fuse` moved to `server/service/session.py` ✓
4. `io_read`/`io_stat` route through Workspace ✓
5. All timestamp fields use `time.time()` (UTC) ✓

6. Looking at the dependency graph, `local.py` is still the most complex with 15 imports, and it's importing `workspace.consistency` directly even though the workspace module already handles that. The main candidates for next steps are `local.py` which mixes five different concerns around workspace lifecycle, command execution, file I/O, FUSE operations, and process management—though they're all tightly coupled through the `_sessions` dict—and `server/fastapi/config.py` which contains the `MountConfig` Pydantic model that could be relocated closer to its actual usage. The FUSE_OPS global loads all backends at import time, which could be deferred until actually needed. SyncPolicy and CommandStats are defined in types.py but belong in their respective domain modules—workspace and commands/observe. I'm also noticing _created_at in Workspace is set but never used, so that's safe to remove. The local.py import of ConsistencyPolicy just to parse config is a layer violation that could be handled in create_workspace's own config logic instead.


A few concrete ones, roughly ordered by impact:

**1. Remove `Workspace._created_at`** (trivial)
It's set but never read anywhere. Dead field.

**2. Move `SyncPolicy` out of `types.py`**
`SyncPolicy` is only used by `Workspace`. It belongs in `workspace/` (e.g., `workspace/sync.py` already exists). `types.py` should stay as the truly shared primitives layer (`FileStat`, `MountMode`, `Inode`, etc.).

**3. Move `CommandStats` out of `types.py`**
`CommandStats` is only used by `session.py`. It belongs in `observe/` (it's observability data) or `server/service/session.py` itself.

**4. `local.py` imports `ConsistencyPolicy` from `workspace.consistency` directly**
It's only used to parse the `consistency` key in `create_workspace()`. Since `Workspace.__init__` already accepts a `ConsistencyPolicy`, the import could be eliminated by moving the parsing to a small helper in `workspace/` — or just accepting the import (it's not wrong, just a cross-layer reach).

**5. Lazy-load FUSE backends in `fuse/__init__.py`**
`FUSE_OPS` currently imports S3/Parquet at module load time. These are heavy (boto3, pyarrow) and only needed when those backends are actually registered. Could build the dict on first access.

The two that give the most signal-to-noise improvement are **#2 + #3** — they clarify what `types.py` is actually for (shared primitive types, not application-level state models). Want to do those?


Yea let's have a plan and start


The user wants to do #2 + #3: move `SyncPolicy` out of `types.py` and move `CommandStats` out of `types.py`. Let me also include removing the dead `Workspace._created_at` field since it's trivial.

Let me enter plan mode and explore the codebase to understand all usages of `SyncPolicy` and `CommandStats`.


Entered plan mode. You should now focus on exploring the codebase and designing an implementation approach.

In plan mode, you should:
1. Thoroughly explore the codebase to understand existing patterns
2. Identify similar features and architectural approaches
3. Consider multiple approaches and their trade-offs
4. Use AskUserQuestion if you need to clarify the approach
5. Design a concrete implementation strategy
6. When ready, use ExitPlanMode to present your plan for approval

Remember: DO NOT write or edit any files yet. This is a read-only exploration and planning phase.


Agent

Find all SyncPolicy and CommandStats usages

Prompt:
In /Users/agent/strukto/mirage/, find all usages of `SyncPolicy` and `CommandStats` across the codebase.

For each, I need:
1. Every file that imports it (grep for `SyncPolicy` and `CommandStats`)
2. Every file that uses it (how it's used, not just imported)
3. The full definition in mirage/types.py

Also read:
- mirage/types.py (full file)
- mirage/workspace/sync.py (full file)

Report file paths and line numbers for all occurrences.


Now I have all the information I need. Let me compile a comprehensive report:

## Complete Report: SyncPolicy and CommandStats Usage

### PART 1: Type Definitions

#### SyncPolicy (Enum)
**File:** `/Users/agent/strukto/mirage/mirage/types.py` (Lines 37-40)
```python
class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"
```

#### CommandStats (BaseModel)
**File:** `/Users/agent/strukto/mirage/mirage/types.py` (Lines 96-102)
```python
class CommandStats(BaseModel):
    total_commands: int = 0
    total_errors: int = 0
    last_command: str = ""
    last_timestamp: str = ""
    command_counts: dict[str, int] = Field(default_factory=dict)
```

---

### PART 2: SyncPolicy - Files That Import It (18 files)

1. **`/Users/agent/strukto/mirage/examples/r2.py`** (Line 14)
2. **`/Users/agent/strukto/mirage/examples/local.py`** (Line 11)
3. **`/Users/agent/strukto/mirage/examples/memory.py`** (Line 8)
4. **`/Users/agent/strukto/mirage/mirage/__init__.py`** (Line 2)
5. **`/Users/agent/strukto/mirage/mirage/runtime/local.py`** (Line 4)
6. **`/Users/agent/strukto/mirage/mirage/runtime/remote.py`** (Line 11)
7. **`/Users/agent/strukto/mirage/mirage/server/fastapi/config.py`** (Line 3)
8. **`/Users/agent/strukto/mirage/mirage/server/service/local.py`** (Line 19)
9. **`/Users/agent/strukto/mirage/mirage/workspace/workspace.py`** (Line 7)
10. **`/Users/agent/strukto/mirage/tests/commands/builtin/test_read.py`** (Line 7)
11. **`/Users/agent/strukto/mirage/tests/commands/custom/test_arg_resolver.py`** (Line 3)
12. **`/Users/agent/strukto/mirage/tests/commands/custom/test_registry.py`** (Line 11)
13. **`/Users/agent/strukto/mirage/tests/conftest.py`** (Line 4)
14. **`/Users/agent/strukto/mirage/tests/fuse/remote/test_remote.py`** (Line 5)
15. **`/Users/agent/strukto/mirage/tests/integration/test_remote_transfer.py`** (Line 6)
16. **`/Users/agent/strukto/mirage/tests/observe/test_inspector.py`** (Line 7)
17. **`/Users/agent/strukto/mirage/tests/runtime/test_base.py`** (Line 5)
18. **`/Users/agent/strukto/mirage/tests/runtime/test_memory.py`** (Line 5)
19. **`/Users/agent/strukto/mirage/tests/workspace/test_workspace.py`** (Line 6)

---

### PART 3: SyncPolicy - Usage Details (Where It's Used)

#### Examples

**`/Users/agent/strukto/mirage/examples/r2.py`** (Line 33)
- Usage: `sync_policy=SyncPolicy.IMMEDIATE`

**`/Users/agent/strukto/mirage/examples/local.py`** (Line 19)
- Usage: `sync_policy=SyncPolicy.IMMEDIATE,  # writes go to disk immediately`

**`/Users/agent/strukto/mirage/examples/memory.py`** (Line 13)
- Usage: `sync_policy=SyncPolicy.IMMEDIATE`

#### Core Library Files

**`/Users/agent/strukto/mirage/mirage/__init__.py`** (Line 14)
- Usage: Export in `__all__` list: `"SyncPolicy"`

**`/Users/agent/strukto/mirage/mirage/server/fastapi/config.py`** (Line 17)
- Usage: `sync_policy: SyncPolicy = SyncPolicy.STAGED` (default field in CreateWorkspaceRequest)

**`/Users/agent/strukto/mirage/mirage/server/service/local.py`** (Line 69)
- Usage: `sync_policy=SyncPolicy(config.get("sync_policy", "staged"))`

**`/Users/agent/strukto/mirage/mirage/workspace/workspace.py`**
- Line 7: Import statement
- Line 42: Type annotation in docstring example: `sync_policy=SyncPolicy.STAGED`
- Line 53: Parameter in `__init__`: `sync_policy: SyncPolicy = SyncPolicy.STAGED`
- Line 254: Condition check: `if self._sync_policy == SyncPolicy.IMMEDIATE:`

**`/Users/agent/strukto/mirage/mirage/runtime/local.py`** (Line 17)
- Usage: `sync_policy=SyncPolicy.IMMEDIATE`

**`/Users/agent/strukto/mirage/mirage/runtime/remote.py`** (Line 28)
- Usage: `sync_policy=SyncPolicy.IMMEDIATE`

#### Test Files

**`/Users/agent/strukto/mirage/tests/conftest.py`**
- Line 18: `sync_policy=SyncPolicy.IMMEDIATE`
- Line 27: `sync_policy=SyncPolicy.STAGED`

**`/Users/agent/strukto/mirage/tests/workspace/test_workspace.py`**
- Line 24: Function parameter default: `def _make_ws(mode=MountMode.WRITE, sync_policy=SyncPolicy.STAGED)`
- Line 157: Usage: `ws, backend = _make_ws(sync_policy=SyncPolicy.STAGED)`
- Line 165: Usage: `ws, backend = _make_ws(sync_policy=SyncPolicy.IMMEDIATE)`
- Lines 194, 204, 215, 227, 236, 249: Multiple usages of `sync_policy=SyncPolicy.IMMEDIATE`

**`/Users/agent/strukto/mirage/tests/fuse/remote/test_remote.py`**
- Line 15: `sync_policy=SyncPolicy.IMMEDIATE`
- Line 44: `sync_policy=SyncPolicy.IMMEDIATE`

**`/Users/agent/strukto/mirage/tests/integration/test_remote_transfer.py`**
- Line 28: `sync_policy=SyncPolicy.IMMEDIATE`
- Line 74: `sync_policy=SyncPolicy.IMMEDIATE`
- Line 96: `sync_policy=SyncPolicy.IMMEDIATE`
- Line 120: `sync_policy=SyncPolicy.IMMEDIATE`

**`/Users/agent/strukto/mirage/tests/runtime/test_base.py`**
- Line 14: `sync_policy=SyncPolicy.IMMEDIATE`
- Line 73: `sync_policy=SyncPolicy.IMMEDIATE`

**`/Users/agent/strukto/mirage/tests/runtime/test_memory.py`** (Line 14)
- Usage: `sync_policy=SyncPolicy.IMMEDIATE`

**`/Users/agent/strukto/mirage/tests/commands/builtin/test_read.py`** (Line 16)
- Usage: `sync_policy=SyncPolicy.IMMEDIATE`

**`/Users/agent/strukto/mirage/tests/commands/custom/test_arg_resolver.py`**
- Line 10: `sync_policy=SyncPolicy.IMMEDIATE`
- Line 26: `sync_policy=SyncPolicy.IMMEDIATE`
- Line 47: `sync_policy=SyncPolicy.IMMEDIATE`
- Line 69: `sync_policy=SyncPolicy.IMMEDIATE`
- Line 79: `sync_policy=SyncPolicy.IMMEDIATE`

**`/Users/agent/strukto/mirage/tests/commands/custom/test_registry.py`**
- Multiple usages across many test functions (lines 29, 88, 180, 208, 268, 288, 305, 324, 356, 382, 413, 426) with `sync_policy=SyncPolicy.IMMEDIATE`

**`/Users/agent/strukto/mirage/tests/observe/test_inspector.py`**
- Line 29: `sync_policy=SyncPolicy.STAGED`
- Line 99: `sync_policy=SyncPolicy.IMMEDIATE`

---

### PART 4: CommandStats - Files That Import It (3 files)

1. **`/Users/agent/strukto/mirage/mirage/server/service/session.py`** (Line 11)
2. **`/Users/agent/strukto/mirage/tests/observe/test_inspector.py`** (Line 7)
3. **`/Users/agent/strukto/mirage/tests/test_types.py`** (Line 4)

---

### PART 5: CommandStats - Usage Details (Where It's Used)

**`/Users/agent/strukto/mirage/mirage/server/service/session.py`**
- Line 11: Import statement
- Line 29: Field in WorkspaceSession class: `command_stats: CommandStats = Field(default_factory=CommandStats)`

**`/Users/agent/strukto/mirage/tests/observe/test_inspector.py`**
- Line 7: Import statement
- Line 22: Field in _FakeSession dataclass: `command_stats: CommandStats = field(default_factory=CommandStats)`
- Line 56: Attribute assignment: `session.command_stats.total_commands = 5`
- Line 57: Attribute assignment: `session.command_stats.total_errors = 1`
- Line 58: Attribute assignment: `session.command_stats.last_command = "cat /tmp/test"`

**`/Users/agent/strukto/mirage/tests/test_types.py`**
- Line 4: Import statement
- Line 53: Instantiation: `cs = CommandStats()`
- Line 54: Field access: `assert cs.total_commands == 0`
- Line 55: Field access: `assert cs.command_counts == {}`

---

### PART 6: Related Sync File

**`/Users/agent/strukto/mirage/mirage/workspace/sync.py`**
- Does NOT import `SyncPolicy` or `CommandStats`
- Contains `DirtyTracker` class that tracks sync operations
- Uses `SyncResult` and `Inode` types from `mirage.types`

---

## Summary

**SyncPolicy:**
- Definition: Lines 37-40 in `/Users/agent/strukto/mirage/mirage/types.py`
- Total imports: 18 files
- Primary usage: Passed as `sync_policy` parameter when creating `Workspace` objects
- Three enum values: `STAGED` (default), `IMMEDIATE`, `MANUAL`
- Main functional use: Controls when writes are synced to backend (line 254 in workspace.py)

**CommandStats:**
- Definition: Lines 96-102 in `/Users/agent/strukto/mirage/mirage/types.py`
- Total imports: 3 files (1 core module, 2 test files)
- Primary usage: Stored in `WorkspaceSession` as a field for tracking command execution metrics
- Fields track: total commands, total errors, last command executed, timestamp, and command counts dictionary
- Used in tests to verify command statistics tracking functionality

agentId: a230e2abcc59b0e9d (for resuming to continue this agent's work if needed)
<usage>total_tokens: 35113
tool_uses: 14
duration_ms: 28708</usage>

Prompt:
In /Users/agent/strukto/mirage/, find all usages of `SyncPolicy` and `CommandStats` across the codebase.

For each, I need:
1. Every file that imports it (grep for `SyncPolicy` and `CommandStats`)
2. Every file that uses it (how it's used, not just imported)
3. The full definition in mirage/types.py

Also read:
- mirage/types.py (full file)
- mirage/workspace/sync.py (full file)

Report file paths and line numbers for all occurrences.


Now I have a clear picture. Let me think about the plan:

**SyncPolicy** — used in 18 files (many tests). It belongs conceptually with `Workspace` since it controls how the workspace syncs writes. Best home: `mirage/workspace/sync.py` since that file already handles sync logic. OR add to `mirage/workspace/__init__.py` re-exports.

Actually, `workspace/sync.py` contains `DirtyTracker` - it's the sync engine. `SyncPolicy` is the configuration enum for it. So moving `SyncPolicy` to `workspace/sync.py` is the right call.

Since the user wants no backward compatibility, I'll need to update all 18 import sites across the test files and `mirage/__init__.py` to pull `SyncPolicy` from its new location in `workspace/sync.py`. Now I need to update all the import statements across the codebase to use the new locations. For `CommandStats`, since it's only used in three places and is tightly coupled to session tracking, I think `observe/entries.py` makes the most sense alongside the other observability data structures, though I could also keep it in `server/service/session.py` given how localized its usage is.

Actually, reconsidering — `observe/entries.py` is specifically for log entries, and `CommandStats` is more of an accumulator than an entry. The cleanest approach is to move it directly into `server/service/session.py` where it's actually used, avoiding unnecessary file proliferation. I should also remove the unused `_created_at` field from `Workspace` while I'm refactoring.

Now I'm planning the refactoring work. First, I'll move `SyncPolicy` from `types.py` into `workspace/sync.py`, then re-export it through `workspace/__init__.py` so imports can stay clean. This means updating the import source in `mirage/__init__.py` and then tracking down all the files currently importing `SyncPolicy` from `mirage.types` to point them to the new location instead.

After that, I need to do the same thing with `CommandStats` — moving it from `types.py` to `server/service/session.py` and updating any test files that currently pull it from `mirage.types`. But wait, `tests/test_types.py` imports `CommandStats` and tests it. If we move it out of `types.py`, this test should move or be updated.

Actually, importing `CommandStats` in tests from its new location is fine.

Let me think about the `test_types.py` - it probably tests various types. The CommandStats test there can stay if we re-export from types.py... but CLAUDE.md says no backward compat.

Plan summary:
1. Move `SyncPolicy` to `workspace/sync.py`, re-export from `workspace/__init__.py`
2. Update all import sites (~18 files)
3. Move `CommandStats` to `server/service/session.py`
4. Update 3 import sites (session.py already has it, test_inspector.py, test_types.py)
5. Remove `Workspace._created_at` dead field

Now I'll execute this plan.


Now I have everything I need. `SyncPolicy` is used in 18 files, `CommandStats` in only 3. Let me write the plan:


     1→from enum import Enum
     2→
     3→from pydantic import BaseModel, ConfigDict, Field
     4→
     5→
     6→class FileType(str, Enum):
     7→    DIRECTORY = "directory"
     8→    TEXT = "text"
     9→    BINARY = "binary"
    10→    JSON = "json"
    11→    CSV = "csv"
    12→    IMAGE_PNG = "image/png"
    13→    IMAGE_JPEG = "image/jpeg"
    14→    IMAGE_GIF = "image/gif"
    15→    ZIP = "application/zip"
    16→    GZIP = "application/gzip"
    17→    PDF = "application/pdf"
    18→
    19→
    20→class CostLevel(str, Enum):
    21→    CHEAP = "cheap"
    22→    PARTIAL = "partial"
    23→    EXPENSIVE = "expensive"
    24→    NETWORK = "network"
    25→
    26→
    27→class FileStat(BaseModel):
    28→    model_config = ConfigDict(frozen=True)
    29→
    30→    name: str
    31→    size: int | None = None
    32→    modified: str | None = None
    33→    type: FileType | None = None
    34→    extra: dict = Field(default_factory=dict)
    35→
    36→
    37→class SyncPolicy(str, Enum):
    38→    STAGED = "staged"
    39→    IMMEDIATE = "immediate"
    40→    MANUAL = "manual"
    41→
    42→
    43→class MountMode(str, Enum):
    44→    READ = "read"
    45→    WRITE = "write"
    46→    EXEC = "exec"
    47→
    48→
    49→class RuntimeType(str, Enum):
    50→    MEMORY = "memory"
    51→    LOCAL = "local"
    52→    REMOTE = "remote"
    53→
    54→
    55→class BackendType(str, Enum):
    56→    MEMORY = "memory"
    57→    LOCAL = "local"
    58→    S3 = "s3"
    59→    R2 = "r2"
    60→    HTTP = "http"
    61→    HTTPS = "https"
    62→
    63→
    64→class Inode(BaseModel):
    65→    virtual_path: str
    66→    backend_mount: str
    67→    checksum: str | None = None
    68→    size: int | None = None
    69→    remote_checksum: str | None = None
    70→    dirty: bool = False
    71→
    72→
    73→class SyncResult(BaseModel):
    74→    model_config = ConfigDict(frozen=True)
    75→
    76→    path: str
    77→    op: str
    78→    status: str
    79→    remote: str | None = None
    80→    bytes: int | None = None
    81→    duration_ms: int = 0
    82→    error: str | None = None
    83→
    84→
    85→class TransferStats(BaseModel):
    86→    bytes_read: int = 0
    87→    bytes_written: int = 0
    88→    read_ops: int = 0
    89→    write_ops: int = 0
    90→    cache_hits: int = 0
    91→    cache_misses: int = 0
    92→    total_read_ms: int = 0
    93→    total_write_ms: int = 0
    94→
    95→
    96→class CommandStats(BaseModel):
    97→    total_commands: int = 0
    98→    total_errors: int = 0
    99→    last_command: str = ""
   100→    last_timestamp: str = ""
   101→    command_counts: dict[str, int] = Field(default_factory=dict)
   102→
   103→
   104→class FilePayload(BaseModel):
   105→    checksum: str
   106→    data: bytes | None = None
   107→
   108→
   109→class RemoteCommandOptions(BaseModel):
   110→    max_file_size: str = "100MB"
   111→    cache: str = "enabled"
   112→
   113→
   114→class CommandResult(BaseModel):
   115→    model_config = ConfigDict(arbitrary_types_allowed=True)
   116→
   117→    stdout: str = ""
   118→    output_files: dict[str, bytes] = {}
   119→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

from enum import Enum

from pydantic import BaseModel, ConfigDict, Field

class FileType(str, Enum):
    DIRECTORY = "directory"
    TEXT = "text"
    BINARY = "binary"
    JSON = "json"
    CSV = "csv"
    IMAGE_PNG = "image/png"
    IMAGE_JPEG = "image/jpeg"
    IMAGE_GIF = "image/gif"
    ZIP = "application/zip"
    GZIP = "application/gzip"
    PDF = "application/pdf"

class CostLevel(str, Enum):
    CHEAP = "cheap"
    PARTIAL = "partial"
    EXPENSIVE = "expensive"
    NETWORK = "network"

class FileStat(BaseModel):
    model_config = ConfigDict(frozen=True)

    name: str
    size: int | None = None
    modified: str | None = None
    type: FileType | None = None
    extra: dict = Field(default_factory=dict)

class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"

class MountMode(str, Enum):
    READ = "read"
    WRITE = "write"
    EXEC = "exec"

class RuntimeType(str, Enum):
    MEMORY = "memory"
    LOCAL = "local"
    REMOTE = "remote"

class BackendType(str, Enum):
    MEMORY = "memory"
    LOCAL = "local"
    S3 = "s3"
    R2 = "r2"
    HTTP = "http"
    HTTPS = "https"

class Inode(BaseModel):
    virtual_path: str
    backend_mount: str
    checksum: str | None = None
    size: int | None = None
    remote_checksum: str | None = None
    dirty: bool = False

class SyncResult(BaseModel):
    model_config = ConfigDict(frozen=True)

    path: str
    op: str
    status: str
    remote: str | None = None
    bytes: int | None = None
    duration_ms: int = 0
    error: str | None = None

class TransferStats(BaseModel):
    bytes_read: int = 0
    bytes_written: int = 0
    read_ops: int = 0
    write_ops: int = 0
    cache_hits: int = 0
    cache_misses: int = 0
    total_read_ms: int = 0
    total_write_ms: int = 0

class CommandStats(BaseModel):
    total_commands: int = 0
    total_errors: int = 0
    last_command: str = ""
    last_timestamp: str = ""
    command_counts: dict[str, int] = Field(default_factory=dict)

class FilePayload(BaseModel):
    checksum: str
    data: bytes | None = None

class RemoteCommandOptions(BaseModel):
    max_file_size: str = "100MB"
    cache: str = "enabled"

class CommandResult(BaseModel):
    model_config = ConfigDict(arbitrary_types_allowed=True)

    stdout: str = ""
    output_files: dict[str, bytes] = {}


Now I have the full picture. Let me read `mirage/__init__.py` to understand the current re-exports.


     1→from mirage.backend.local import LocalBackend, MemoryBackend
     2→from mirage.types import FileStat, Inode, MountMode, SyncPolicy, SyncResult
     3→from mirage.workspace import Workspace
     4→from mirage.workspace.consistency import ConsistencyPolicy
     5→
     6→__all__ = [
     7→    "Workspace",
     8→    "MemoryBackend",
     9→    "LocalBackend",
    10→    "ConsistencyPolicy",
    11→    "FileStat",
    12→    "Inode",
    13→    "MountMode",
    14→    "SyncPolicy",
    15→    "SyncResult",
    16→]
    17→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

from mirage.backend.local import LocalBackend, MemoryBackend
from mirage.types import FileStat, Inode, MountMode, SyncPolicy, SyncResult
from mirage.workspace import Workspace
from mirage.workspace.consistency import ConsistencyPolicy

__all__ = [
    "Workspace",
    "MemoryBackend",
    "LocalBackend",
    "ConsistencyPolicy",
    "FileStat",
    "Inode",
    "MountMode",
    "SyncPolicy",
    "SyncResult",
]


from mirage.workspace.workspace import Workspace

__all__ = ["Workspace"]


Now I have a complete picture. Let me write the plan.

**SyncPolicy** — move from `types.py` to `workspace/sync.py`:
- Semantic home: it controls the workspace sync behavior, and `sync.py` already contains `DirtyTracker`
- Update `workspace/__init__.py` to re-export `SyncPolicy`
- Update `mirage/__init__.py`: change import from `mirage.types` to `mirage.workspace.sync` or `mirage.workspace`
- Update all 18 files that import from `mirage.types`

Wait, but many test files import `SyncPolicy from mirage.types`.

The right approach is to move it to `workspace/sync.py` and re-export from `workspace/__init__.py`, so test files can import from either `mirage.workspace` or `mirage.workspace.sync`, while internal files like `workspace/workspace.py` and `server/service/local.py` import directly from `mirage.workspace.sync`. I need to update `mirage/__init__.py` to pull from the new location and then systematically update all the affected files.

Now I'm going through the import updates needed across the codebase — `server/fastapi/config.py`, `server/service/local.py`, `workspace/workspace.py`, and the runtime modules all need to point to `mirage.workspace.sync`, while tests and examples will use the re-export from `mirage.workspace` for consistency. I also need to move `CommandStats` from `types.py` to `server/service/session`.

py since only a few files reference it, then update the corresponding test imports. Finally, I'll remove the unused `_created_at` field from the `Workspace` class.


Now I have everything. Writing the plan:


Edit

# Refactor `server/service/local.py` — Extract Session Model

## Context

`mirage/server/service/local.py` (426 lines) mixes two concerns:
1. **Data model** — `WorkspaceSession` (Pydantic model, lines 31–48) and `_unmount_fuse` helper (lines 51–61)
2. **Service logic** — `LocalService` class (lines 64–426, ~360 lines)

Extracting the session model reduces cognitive load when reading `local.py` and follows the same convention already used across `backend/`, `workspace/`, and `fuse/` — where models and helpers live in focused sub-modules.

---

## Step 1: Create `mirage/server/service/session.py`

Move `WorkspaceSession` and `_unmount_fuse` verbatim into a new file.

**Imports needed in `session.py`**:
```python
import os
import signal
import subprocess
import sys
import time

from pydantic import BaseModel, ConfigDict, Field

from mirage.commands.custom.registry import CommandRegistry
from mirage.fuse.registry import FuseOpRegistry
from mirage.types import CommandStats, MountMode, RuntimeType
from mirage.workspace import Workspace
```

Then paste `WorkspaceSession` (lines 31–48 of `local.py`) and `_unmount_fuse` (lines 51–61) unchanged.

## Step 2: Update `mirage/server/service/local.py`

**Remove** the `WorkspaceSession` class definition (lines 31–48) and `_unmount_fuse` function (lines 51–61).

**Remove imports** now only used by the deleted code:
- `os`, `signal`, `subprocess`, `sys` (only used by `_unmount_fuse`)
- `time` (only used by `WorkspaceSession.created_at` default)
- `from pydantic import BaseModel, ConfigDict, Field`
- `CommandStats` from `mirage.types` (keep remaining types)
- `from mirage.commands.custom.registry import CommandRegistry` (keep `ExternalCommand`)
- `from mirage.fuse.registry import FuseOpRegistry`

**Add** one import at the top:
```python
from mirage.server.service.session import WorkspaceSession, _unmount_fuse
```

## Key Files

- `mirage/server/service/session.py` — new file
- `mirage/server/service/local.py` — remove model/helper, add import

## Files NOT Changed

- `mirage/server/service/base.py` — untouched
- `mirage/server/fastapi/app.py` — imports only `LocalService`
- `tests/server/service/test_local.py` — imports only `LocalService`; accesses `svc._sessions[ws_id]` which still works

## Verification

```bash
uv run pytest tests/server/service/test_local.py -v
uv run pytest -q
```

# Clean up `types.py` — Move Domain-Specific Types to Their Owners

## Context

`mirage/types.py` has grown to contain types that don't belong there: `SyncPolicy` controls workspace sync behaviour and belongs next to the sync engine; `CommandStats` tracks session metrics and belongs with the session model. Keeping them in `types.py` implies they're shared primitives, but they're domain-specific to their subsystems. This refactor moves each type to its owning module and removes the dead `Workspace._created_at` field.

---

## Task 1: Move `SyncPolicy` → `mirage/workspace/sync.py`

**`mirage/workspace/sync.py`**: Add at top (after existing imports):
```python
class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"
```
Add `from enum import Enum` import.

**`mirage/types.py`**: Remove `SyncPolicy` class (lines 37–40).

**`mirage/workspace/__init__.py`**: Add re-export:
```python
from mirage.workspace.sync import SyncPolicy
from mirage.workspace.workspace import Workspace

__all__ = ["Workspace", "SyncPolicy"]
```

**`mirage/__init__.py`**: Change import source:
```python
# Before:
from mirage.types import FileStat, Inode, MountMode, SyncPolicy, SyncResult
# After:
from mirage.types import FileStat, Inode, MountMode, SyncResult
from mirage.workspace import SyncPolicy
```

**Update all remaining `from mirage.types import ... SyncPolicy ...`** (18 files):

Internal mirage modules — change to `from mirage.workspace.sync import SyncPolicy`:
- `mirage/workspace/workspace.py`
- `mirage/server/fastapi/config.py`
- `mirage/server/service/local.py`
- `mirage/runtime/local.py`
- `mirage/runtime/remote.py`

Tests + examples — change to `from mirage.workspace import SyncPolicy`:
- `examples/r2.py`, `examples/local.py`, `examples/memory.py`
- `tests/conftest.py`
- `tests/workspace/test_workspace.py`
- `tests/commands/builtin/test_read.py`
- `tests/commands/custom/test_arg_resolver.py`
- `tests/commands/custom/test_registry.py`
- `tests/fuse/remote/test_remote.py`
- `tests/integration/test_remote_transfer.py`
- `tests/observe/test_inspector.py`
- `tests/runtime/test_base.py`
- `tests/runtime/test_memory.py`

---

## Task 2: Move `CommandStats` → `mirage/server/service/session.py`

**`mirage/server/service/session.py`**: Add class definition before `WorkspaceSession`:
```python
class CommandStats(BaseModel):
    total_commands: int = 0
    total_errors: int = 0
    last_command: str = ""
    last_timestamp: str = ""
    command_counts: dict[str, int] = Field(default_factory=dict)
```
Remove `from mirage.types import CommandStats` (it's now defined here).

**`mirage/types.py`**: Remove `CommandStats` class (lines 96–101).

**Update 2 import sites:**
- `tests/observe/test_inspector.py`: `from mirage.types import CommandStats` → `from mirage.server.service.session import CommandStats`
- `tests/test_types.py`: same change

---

## Task 3: Remove dead `Workspace._created_at`

**`mirage/workspace/workspace.py`**: Delete line `self._created_at: float = time.time()`. Remove `import time` if it becomes unused (check — `time` is still used for `t0 = time.monotonic()` in `cat()`, so keep the import).

---

## Key Files Modified

- `mirage/types.py` — remove `SyncPolicy`, `CommandStats`
- `mirage/workspace/sync.py` — add `SyncPolicy`
- `mirage/workspace/__init__.py` — re-export `SyncPolicy`
- `mirage/__init__.py` — update import source
- `mirage/workspace/workspace.py` — update import, remove `_created_at`
- `mirage/server/service/session.py` — add `CommandStats` definition, remove types import
- `mirage/server/fastapi/config.py`, `mirage/server/service/local.py` — update `SyncPolicy` import
- `mirage/runtime/local.py`, `mirage/runtime/remote.py` — update `SyncPolicy` import
- 11 test/example files — update `SyncPolicy` import
- `tests/observe/test_inspector.py`, `tests/test_types.py` — update `CommandStats` import

## Verification

```bash
uv run pytest --no-cov -q   # 656 passed, 1 skipped
```


The file /Users/agent/.claude/plans/shimmering-leaping-wozniak.md has been updated successfully.

# Refactor `server/service/local.py` — Extract Session Model

## Context

`mirage/server/service/local.py` (426 lines) mixes two concerns:
1. **Data model** — `WorkspaceSession` (Pydantic model, lines 31–48) and `_unmount_fuse` helper (lines 51–61)
2. **Service logic** — `LocalService` class (lines 64–426, ~360 lines)

Extracting the session model reduces cognitive load when reading `local.py` and follows the same convention already used across `backend/`, `workspace/`, and `fuse/` — where models and helpers live in focused sub-modules.

---

## Step 1: Create `mirage/server/service/session.py`

Move `WorkspaceSession` and `_unmount_fuse` verbatim into a new file.

**Imports needed in `session.py`**:
```python
import os
import signal
import subprocess
import sys
import time

from pydantic import BaseModel, ConfigDict, Field

from mirage.commands.custom.registry import CommandRegistry
from mirage.fuse.registry import FuseOpRegistry
from mirage.types import CommandStats, MountMode, RuntimeType
from mirage.workspace import Workspace
```

Then paste `WorkspaceSession` (lines 31–48 of `local.py`) and `_unmount_fuse` (lines 51–61) unchanged.

## Step 2: Update `mirage/server/service/local.py`

**Remove** the `WorkspaceSession` class definition (lines 31–48) and `_unmount_fuse` function (lines 51–61).

**Remove imports** now only used by the deleted code:
- `os`, `signal`, `subprocess`, `sys` (only used by `_unmount_fuse`)
- `time` (only used by `WorkspaceSession.created_at` default)
- `from pydantic import BaseModel, ConfigDict, Field`
- `CommandStats` from `mirage.types` (keep remaining types)
- `from mirage.commands.custom.registry import CommandRegistry` (keep `ExternalCommand`)
- `from mirage.fuse.registry import FuseOpRegistry`

**Add** one import at the top:
```python
from mirage.server.service.session import WorkspaceSession, _unmount_fuse
```

## Key Files

- `mirage/server/service/session.py` — new file
- `mirage/server/service/local.py` — remove model/helper, add import

## Files NOT Changed

- `mirage/server/service/base.py` — untouched
- `mirage/server/fastapi/app.py` — imports only `LocalService`
- `tests/server/service/test_local.py` — imports only `LocalService`; accesses `svc._sessions[ws_id]` which still works

## Verification

```bash
uv run pytest tests/server/service/test_local.py -v
uv run pytest -q
```

# Clean up `types.py` — Move Domain-Specific Types to Their Owners

## Context

`mirage/types.py` has grown to contain types that don't belong there: `SyncPolicy` controls workspace sync behaviour and belongs next to the sync engine; `CommandStats` tracks session metrics and belongs with the session model. Keeping them in `types.py` implies they're shared primitives, but they're domain-specific to their subsystems. This refactor moves each type to its owning module and removes the dead `Workspace._created_at` field.

---

## Task 1: Move `SyncPolicy` → `mirage/workspace/sync.py`

**`mirage/workspace/sync.py`**: Add at top (after existing imports):
```python
class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"
```
Add `from enum import Enum` import.

**`mirage/types.py`**: Remove `SyncPolicy` class (lines 37–40).

**`mirage/workspace/__init__.py`**: Add re-export:
```python
from mirage.workspace.sync import SyncPolicy
from mirage.workspace.workspace import Workspace

__all__ = ["Workspace", "SyncPolicy"]
```

**`mirage/__init__.py`**: Change import source:
```python
# Before:
from mirage.types import FileStat, Inode, MountMode, SyncPolicy, SyncResult
# After:
from mirage.types import FileStat, Inode, MountMode, SyncResult
from mirage.workspace import SyncPolicy
```

**Update all remaining `from mirage.types import ... SyncPolicy ...`** (18 files):

Internal mirage modules — change to `from mirage.workspace.sync import SyncPolicy`:
- `mirage/workspace/workspace.py`
- `mirage/server/fastapi/config.py`
- `mirage/server/service/local.py`
- `mirage/runtime/local.py`
- `mirage/runtime/remote.py`

Tests + examples — change to `from mirage.workspace import SyncPolicy`:
- `examples/r2.py`, `examples/local.py`, `examples/memory.py`
- `tests/conftest.py`
- `tests/workspace/test_workspace.py`
- `tests/commands/builtin/test_read.py`
- `tests/commands/custom/test_arg_resolver.py`
- `tests/commands/custom/test_registry.py`
- `tests/fuse/remote/test_remote.py`
- `tests/integration/test_remote_transfer.py`
- `tests/observe/test_inspector.py`
- `tests/runtime/test_base.py`
- `tests/runtime/test_memory.py`

---

## Task 2: Move `CommandStats` → `mirage/server/service/session.py`

**`mirage/server/service/session.py`**: Add class definition before `WorkspaceSession`:
```python
class CommandStats(BaseModel):
    total_commands: int = 0
    total_errors: int = 0
    last_command: str = ""
    last_timestamp: str = ""
    command_counts: dict[str, int] = Field(default_factory=dict)
```
Remove `from mirage.types import CommandStats` (it's now defined here).

**`mirage/types.py`**: Remove `CommandStats` class (lines 96–101).

**Update 2 import sites:**
- `tests/observe/test_inspector.py`: `from mirage.types import CommandStats` → `from mirage.server.service.session import CommandStats`
- `tests/test_types.py`: same change

---

## Task 3: Remove dead `Workspace._created_at`

**`mirage/workspace/workspace.py`**: Delete line `self._created_at: float = time.time()`. Remove `import time` if it becomes unused (check — `time` is still used for `t0 = time.monotonic()` in `cat()`, so keep the import).

---

## Key Files Modified

- `mirage/types.py` — remove `SyncPolicy`, `CommandStats`
- `mirage/workspace/sync.py` — add `SyncPolicy`
- `mirage/workspace/__init__.py` — re-export `SyncPolicy`
- `mirage/__init__.py` — update import source
- `mirage/workspace/workspace.py` — update import, remove `_created_at`
- `mirage/server/service/session.py` — add `CommandStats` definition, remove types import
- `mirage/server/fastapi/config.py`, `mirage/server/service/local.py` — update `SyncPolicy` import
- `mirage/runtime/local.py`, `mirage/runtime/remote.py` — update `SyncPolicy` import
- 11 test/example files — update `SyncPolicy` import
- `tests/observe/test_inspector.py`, `tests/test_types.py` — update `CommandStats` import

## Verification

```bash
uv run pytest --no-cov -q   # 656 passed, 1 skipped
```

-# Refactor `server/service/local.py` — Extract Session Model

+# Clean up `types.py` — Move Domain-Specific Types to Their Owners

-`mirage/server/service/local.py` (426 lines) mixes two concerns:

-1. **Data model** — `WorkspaceSession` (Pydantic model, lines 31–48) and `_unmount_fuse` helper (lines 51–61)

-2. **Service logic** — `LocalService` class (lines 64–426, ~360 lines)

+`mirage/types.py` has grown to contain types that don't belong there: `SyncPolicy` controls workspace sync behaviour and belongs next to the sync engine; `CommandStats` tracks session metrics and belongs with the session model. Keeping them in `types.py` implies they're shared primitives, but they're domain-specific to their subsystems. This refactor moves each type to its owning module and removes the dead `Workspace._created_at` field.

-Extracting the session model reduces cognitive load when reading `local.py` and follows the same convention already used across `backend/`, `workspace/`, and `fuse/` — where models and helpers live in focused sub-modules.

-## Step 1: Create `mirage/server/service/session.py`

+## Task 1: Move `SyncPolicy` → `mirage/workspace/sync.py`

-Move `WorkspaceSession` and `_unmount_fuse` verbatim into a new file.

+**`mirage/workspace/sync.py`**: Add at top (after existing imports):

+**`mirage/types.py`**: Remove `SyncPolicy` class (lines 37–40).

+from mirage.workspace.sync import SyncPolicy

+from mirage.workspace.workspace import Workspace

-from pydantic import BaseModel, ConfigDict, Field

-from mirage.commands.custom.registry import CommandRegistry

-from mirage.fuse.registry import FuseOpRegistry

-from mirage.types import CommandStats, MountMode, RuntimeType

+**`mirage/__init__.py`**: Change import source:

+from mirage.types import FileStat, Inode, MountMode, SyncPolicy, SyncResult

+from mirage.types import FileStat, Inode, MountMode, SyncResult

+from mirage.workspace import SyncPolicy

-Then paste `WorkspaceSession` (lines 31–48 of `local.py`) and `_unmount_fuse` (lines 51–61) unchanged.

+**Update all remaining `from mirage.types import ... SyncPolicy ...`** (18 files):

-## Step 2: Update `mirage/server/service/local.py`

+Internal mirage modules — change to `from mirage.workspace.sync import SyncPolicy`:

-**Remove** the `WorkspaceSession` class definition (lines 31–48) and `_unmount_fuse` function (lines 51–61).

+Tests + examples — change to `from mirage.workspace import SyncPolicy`:

+- `examples/r2.py`, `examples/local.py`, `examples/memory.py`

-**Remove imports** now only used by the deleted code:

-- `os`, `signal`, `subprocess`, `sys` (only used by `_unmount_fuse`)

-- `time` (only used by `WorkspaceSession.created_at` default)

-- `from pydantic import BaseModel, ConfigDict, Field`

-- `CommandStats` from `mirage.types` (keep remaining types)

-- `from mirage.commands.custom.registry import CommandRegistry` (keep `ExternalCommand`)

-- `from mirage.fuse.registry import FuseOpRegistry`

+## Task 2: Move `CommandStats` → `mirage/server/service/session.py`

+**`mirage/server/service/session.py`**: Add class definition before `WorkspaceSession`:

-from mirage.server.service.session import WorkspaceSession, _unmount_fuse

+    command_counts: dict[str, int] = Field(default_factory=dict)

+Remove `from mirage.types import CommandStats` (it's now defined here).

+**`mirage/types.py`**: Remove `CommandStats` class (lines 96–101).

-- `mirage/server/service/session.py` — new file

-- `mirage/server/service/local.py` — remove model/helper, add import

+- `tests/observe/test_inspector.py`: `from mirage.types import CommandStats` → `from mirage.server.service.session import CommandStats`

-- `mirage/server/service/base.py` — untouched

-- `mirage/server/fastapi/app.py` — imports only `LocalService`

-- `tests/server/service/test_local.py` — imports only `LocalService`; accesses `svc._sessions[ws_id]` which still works

+## Task 3: Remove dead `Workspace._created_at`

+**`mirage/workspace/workspace.py`**: Delete line `self._created_at: float = time.time()`. Remove `import time` if it becomes unused (check — `time` is still used for `t0 = time.monotonic()` in `cat()`, so keep the import).

+- `mirage/types.py` — remove `SyncPolicy`, `CommandStats`

+- `mirage/workspace/sync.py` — add `SyncPolicy`

+- `mirage/workspace/__init__.py` — re-export `SyncPolicy`

+- `mirage/__init__.py` — update import source

+- `mirage/workspace/workspace.py` — update import, remove `_created_at`

+- `mirage/server/service/session.py` — add `CommandStats` definition, remove types import

+- `mirage/server/fastapi/config.py`, `mirage/server/service/local.py` — update `SyncPolicy` import

+- `mirage/runtime/local.py`, `mirage/runtime/remote.py` — update `SyncPolicy` import

+- 11 test/example files — update `SyncPolicy` import

+- `tests/observe/test_inspector.py`, `tests/test_types.py` — update `CommandStats` import

-uv run pytest tests/server/service/test_local.py -v

+uv run pytest --no-cov -q   # 656 passed, 1 skipped


ExitPlanMode

# Clean up `types.py` — Move Domain-Specific Types to Their Owners

## Context

`mirage/types.py` has grown to contain types that don't belong there: `SyncPolicy` controls workspace sync behaviour and belongs next to the sync engine; `CommandStats` tracks session metrics and belongs with the session model. Keeping them in `types.py` implies they're shared primitives, but they're domain-specific to their subsystems. This refactor moves each type to its owning module and removes the dead `Workspace._created_at` field.

---

## Task 1: Move `SyncPolicy` → `mirage/workspace/sync.py`

**`mirage/workspace/sync.py`**: Add at top (after existing imports):
```python
class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"
```
Add `from enum import Enum` import.

**`mirage/types.py`**: Remove `SyncPolicy` class (lines 37–40).

**`mirage/workspace/__init__.py`**: Add re-export:
```python
from mirage.workspace.sync import SyncPolicy
from mirage.workspace.workspace import Workspace

__all__ = ["Workspace", "SyncPolicy"]
```

**`mirage/__init__.py`**: Change import source:
```python
# Before:
from mirage.types import FileStat, Inode, MountMode, SyncPolicy, SyncResult
# After:
from mirage.types import FileStat, Inode, MountMode, SyncResult
from mirage.workspace import SyncPolicy
```

**Update all remaining `from mirage.types import ... SyncPolicy ...`** (18 files):

Internal mirage modules — change to `from mirage.workspace.sync import SyncPolicy`:
- `mirage/workspace/workspace.py`
- `mirage/server/fastapi/config.py`
- `mirage/server/service/local.py`
- `mirage/runtime/local.py`
- `mirage/runtime/remote.py`

Tests + examples — change to `from mirage.workspace import SyncPolicy`:
- `examples/r2.py`, `examples/local.py`, `examples/memory.py`
- `tests/conftest.py`
- `tests/workspace/test_workspace.py`
- `tests/commands/builtin/test_read.py`
- `tests/commands/custom/test_arg_resolver.py`
- `tests/commands/custom/test_registry.py`
- `tests/fuse/remote/test_remote.py`
- `tests/integration/test_remote_transfer.py`
- `tests/observe/test_inspector.py`
- `tests/runtime/test_base.py`
- `tests/runtime/test_memory.py`

---

## Task 2: Move `CommandStats` → `mirage/server/service/session.py`

**`mirage/server/service/session.py`**: Add class definition before `WorkspaceSession`:
```python
class CommandStats(BaseModel):
    total_commands: int = 0
    total_errors: int = 0
    last_command: str = ""
    last_timestamp: str = ""
    command_counts: dict[str, int] = Field(default_factory=dict)
```
Remove `from mirage.types import CommandStats` (it's now defined here).

**`mirage/types.py`**: Remove `CommandStats` class (lines 96–101).

**Update 2 import sites:**
- `tests/observe/test_inspector.py`: `from mirage.types import CommandStats` → `from mirage.server.service.session import CommandStats`
- `tests/test_types.py`: same change

---

## Task 3: Remove dead `Workspace._created_at`

**`mirage/workspace/workspace.py`**: Delete line `self._created_at: float = time.time()`. Remove `import time` if it becomes unused (check — `time` is still used for `t0 = time.monotonic()` in `cat()`, so keep the import).

---

## Key Files Modified

- `mirage/types.py` — remove `SyncPolicy`, `CommandStats`
- `mirage/workspace/sync.py` — add `SyncPolicy`
- `mirage/workspace/__init__.py` — re-export `SyncPolicy`
- `mirage/__init__.py` — update import source
- `mirage/workspace/workspace.py` — update import, remove `_created_at`
- `mirage/server/service/session.py` — add `CommandStats` definition, remove types import
- `mirage/server/fastapi/config.py`, `mirage/server/service/local.py` — update `SyncPolicy` import
- `mirage/runtime/local.py`, `mirage/runtime/remote.py` — update `SyncPolicy` import
- 11 test/example files — update `SyncPolicy` import
- `tests/observe/test_inspector.py`, `tests/test_types.py` — update `CommandStats` import

## Verification

```bash
uv run pytest --no-cov -q   # 656 passed, 1 skipped
```


User has approved your plan. You can now start coding. Start with updating your todo list if applicable

Your plan has been saved to: /Users/agent/.claude/plans/shimmering-leaping-wozniak.md
You can refer back to it if needed during implementation.

## Approved Plan:
# Clean up `types.py` — Move Domain-Specific Types to Their Owners

## Context

`mirage/types.py` has grown to contain types that don't belong there: `SyncPolicy` controls workspace sync behaviour and belongs next to the sync engine; `CommandStats` tracks session metrics and belongs with the session model. Keeping them in `types.py` implies they're shared primitives, but they're domain-specific to their subsystems. This refactor moves each type to its owning module and removes the dead `Workspace._created_at` field.

---

## Task 1: Move `SyncPolicy` → `mirage/workspace/sync.py`

**`mirage/workspace/sync.py`**: Add at top (after existing imports):
```python
class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"
```
Add `from enum import Enum` import.

**`mirage/types.py`**: Remove `SyncPolicy` class (lines 37–40).

**`mirage/workspace/__init__.py`**: Add re-export:
```python
from mirage.workspace.sync import SyncPolicy
from mirage.workspace.workspace import Workspace

__all__ = ["Workspace", "SyncPolicy"]
```

**`mirage/__init__.py`**: Change import source:
```python
# Before:
from mirage.types import FileStat, Inode, MountMode, SyncPolicy, SyncResult
# After:
from mirage.types import FileStat, Inode, MountMode, SyncResult
from mirage.workspace import SyncPolicy
```

**Update all remaining `from mirage.types import ... SyncPolicy ...`** (18 files):

Internal mirage modules — change to `from mirage.workspace.sync import SyncPolicy`:
- `mirage/workspace/workspace.py`
- `mirage/server/fastapi/config.py`
- `mirage/server/service/local.py`
- `mirage/runtime/local.py`
- `mirage/runtime/remote.py`

Tests + examples — change to `from mirage.workspace import SyncPolicy`:
- `examples/r2.py`, `examples/local.py`, `examples/memory.py`
- `tests/conftest.py`
- `tests/workspace/test_workspace.py`
- `tests/commands/builtin/test_read.py`
- `tests/commands/custom/test_arg_resolver.py`
- `tests/commands/custom/test_registry.py`
- `tests/fuse/remote/test_remote.py`
- `tests/integration/test_remote_transfer.py`
- `tests/observe/test_inspector.py`
- `tests/runtime/test_base.py`
- `tests/runtime/test_memory.py`

---

## Task 2: Move `CommandStats` → `mirage/server/service/session.py`

**`mirage/server/service/session.py`**: Add class definition before `WorkspaceSession`:
```python
class CommandStats(BaseModel):
    total_commands: int = 0
    total_errors: int = 0
    last_command: str = ""
    last_timestamp: str = ""
    command_counts: dict[str, int] = Field(default_factory=dict)
```
Remove `from mirage.types import CommandStats` (it's now defined here).

**`mirage/types.py`**: Remove `CommandStats` class (lines 96–101).

**Update 2 import sites:**
- `tests/observe/test_inspector.py`: `from mirage.types import CommandStats` → `from mirage.server.service.session import CommandStats`
- `tests/test_types.py`: same change

---

## Task 3: Remove dead `Workspace._created_at`

**`mirage/workspace/workspace.py`**: Delete line `self._created_at: float = time.time()`. Remove `import time` if it becomes unused (check — `time` is still used for `t0 = time.monotonic()` in `cat()`, so keep the import).

---

## Key Files Modified

- `mirage/types.py` — remove `SyncPolicy`, `CommandStats`
- `mirage/workspace/sync.py` — add `SyncPolicy`
- `mirage/workspace/__init__.py` — re-export `SyncPolicy`
- `mirage/__init__.py` — update import source
- `mirage/workspace/workspace.py` — update import, remove `_created_at`
- `mirage/server/service/session.py` — add `CommandStats` definition, remove types import
- `mirage/server/fastapi/config.py`, `mirage/server/service/local.py` — update `SyncPolicy` import
- `mirage/runtime/local.py`, `mirage/runtime/remote.py` — update `SyncPolicy` import
- 11 test/example files — update `SyncPolicy` import
- `tests/observe/test_inspector.py`, `tests/test_types.py` — update `CommandStats` import

## Verification

```bash
uv run pytest --no-cov -q   # 656 passed, 1 skipped
```


TodoWrite

Move SyncPolicy to workspace/sync.py and update all import sites

Move CommandStats to server/service/session.py and update import sites

Remove dead Workspace._created_at field

Verify all tests pass


Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable

Move SyncPolicy to workspace/sync.py and update all import sites

Move CommandStats to server/service/session.py and update import sites

Remove dead Workspace._created_at field

Verify all tests pass


     1→import hashlib
     2→import time
     3→
     4→from mirage.backend.base import BaseBackend
     5→from mirage.types import Inode, SyncResult
     6→
     7→
     8→class DirtyTracker:
     9→    """
    10→    Tracks which virtual paths have local changes that haven't been synced
    11→    to their backing backend.
    12→
    13→    Lifecycle:
    14→        on_read()  — record baseline remote checksum (not dirty)
    15→        on_write() — update local checksum, mark dirty=True
    16→        on_sync()  — upload to backend, clear dirty flag
    17→    """
    18→
    19→    def __init__(self) -> None:
    20→        self._inodes: dict[str, Inode] = {}
    21→
    22→    # ── event hooks ─────────────────────────────────────────────────────────
    23→
    24→    def on_read(self, path: str, data: bytes, mount: str) -> None:
    25→        checksum = _md5(data)
    26→        if path in self._inodes:
    27→            inode = self._inodes[path]
    28→            inode.remote_checksum = checksum
    29→            inode.checksum = checksum
    30→            inode.size = len(data)
    31→            inode.dirty = False
    32→        else:
    33→            self._inodes[path] = Inode(
    34→                virtual_path=path,
    35→                backend_mount=mount,
    36→                checksum=checksum,
    37→                size=len(data),
    38→                remote_checksum=checksum,
    39→                dirty=False,
    40→            )
    41→
    42→    def on_write(self, path: str, data: bytes, mount: str) -> None:
    43→        checksum = _md5(data)
    44→        if path in self._inodes:
    45→            inode = self._inodes[path]
    46→            inode.checksum = checksum
    47→            inode.size = len(data)
    48→            inode.dirty = True
    49→        else:
    50→            self._inodes[path] = Inode(
    51→                virtual_path=path,
    52→                backend_mount=mount,
    53→                checksum=checksum,
    54→                size=len(data),
    55→                remote_checksum=None,
    56→                dirty=True,
    57→            )
    58→
    59→    def on_delete(self, path: str) -> None:
    60→        if path in self._inodes:
    61→            self._inodes[path].dirty = True
    62→            self._inodes[path].checksum = None
    63→            self._inodes[path].size = None
    64→
    65→    def on_sync(self, virtual_path: str, backend_path: str, data: bytes | None,
    66→                backend: BaseBackend) -> SyncResult:
    67→        """
    68→        Upload `data` to backend at `backend_path`. Pass None for deletions.
    69→        `virtual_path` tracks the inode; `backend_path` goes to the backend.
    70→        Returns a SyncResult describing the outcome.
    71→        """
    72→        inode = self._inodes.get(virtual_path)
    73→        op = "delete" if data is None else ("create" if (
    74→            inode and inode.remote_checksum is None) else "modify")
    75→        t0 = time.monotonic()
    76→        try:
    77→            if data is None:
    78→                backend.unlink(backend_path)
    79→            else:
    80→                backend.put(backend_path, data)
    81→            duration_ms = int((time.monotonic() - t0) * 1000)
    82→            checksum = _md5(data) if data is not None else None
    83→            if inode:
    84→                inode.remote_checksum = checksum
    85→                inode.dirty = False
    86→            return SyncResult(path=virtual_path,
    87→                              op=op,
    88→                              status="ok",
    89→                              bytes=len(data) if data else None,
    90→                              duration_ms=duration_ms)
    91→        except Exception as exc:
    92→            duration_ms = int((time.monotonic() - t0) * 1000)
    93→            return SyncResult(path=virtual_path,
    94→                              op=op,
    95→                              status="error",
    96→                              duration_ms=duration_ms,
    97→                              error=str(exc))
    98→
    99→    # ── queries ─────────────────────────────────────────────────────────────
   100→
   101→    def dirty(self) -> list[Inode]:
   102→        return [i for i in self._inodes.values() if i.dirty]
   103→
   104→    def status(self) -> list[Inode]:
   105→        return list(self._inodes.values())
   106→
   107→    def get(self, path: str) -> Inode | None:
   108→        return self._inodes.get(path)
   109→
   110→    def reset(self) -> None:
   111→        self._inodes.clear()
   112→
   113→
   114→def _md5(data: bytes) -> str:
   115→    return hashlib.md5(data).hexdigest()
   116→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

import hashlib
import time

from mirage.backend.base import BaseBackend
from mirage.types import Inode, SyncResult

class DirtyTracker:
    """
    Tracks which virtual paths have local changes that haven't been synced
    to their backing backend.

    Lifecycle:
        on_read()  — record baseline remote checksum (not dirty)
        on_write() — update local checksum, mark dirty=True
        on_sync()  — upload to backend, clear dirty flag
    """

    def __init__(self) -> None:
        self._inodes: dict[str, Inode] = {}

    # ── event hooks ─────────────────────────────────────────────────────────

    def on_read(self, path: str, data: bytes, mount: str) -> None:
        checksum = _md5(data)
        if path in self._inodes:
            inode = self._inodes[path]
            inode.remote_checksum = checksum
            inode.checksum = checksum
            inode.size = len(data)
            inode.dirty = False
        else:
            self._inodes[path] = Inode(
                virtual_path=path,
                backend_mount=mount,
                checksum=checksum,
                size=len(data),
                remote_checksum=checksum,
                dirty=False,
            )

    def on_write(self, path: str, data: bytes, mount: str) -> None:
        checksum = _md5(data)
        if path in self._inodes:
            inode = self._inodes[path]
            inode.checksum = checksum
            inode.size = len(data)
            inode.dirty = True
        else:
            self._inodes[path] = Inode(
                virtual_path=path,
                backend_mount=mount,
                checksum=checksum,
                size=len(data),
                remote_checksum=None,
                dirty=True,
            )

    def on_delete(self, path: str) -> None:
        if path in self._inodes:
            self._inodes[path].dirty = True
            self._inodes[path].checksum = None
            self._inodes[path].size = None

    def on_sync(self, virtual_path: str, backend_path: str, data: bytes | None,
                backend: BaseBackend) -> SyncResult:
        """
        Upload `data` to backend at `backend_path`. Pass None for deletions.
        `virtual_path` tracks the inode; `backend_path` goes to the backend.
        Returns a SyncResult describing the outcome.
        """
        inode = self._inodes.get(virtual_path)
        op = "delete" if data is None else ("create" if (
            inode and inode.remote_checksum is None) else "modify")
        t0 = time.monotonic()
        try:
            if data is None:
                backend.unlink(backend_path)
            else:
                backend.put(backend_path, data)
            duration_ms = int((time.monotonic() - t0) * 1000)
            checksum = _md5(data) if data is not None else None
            if inode:
                inode.remote_checksum = checksum
                inode.dirty = False
            return SyncResult(path=virtual_path,
                              op=op,
                              status="ok",
                              bytes=len(data) if data else None,
                              duration_ms=duration_ms)
        except Exception as exc:
            duration_ms = int((time.monotonic() - t0) * 1000)
            return SyncResult(path=virtual_path,
                              op=op,
                              status="error",
                              duration_ms=duration_ms,
                              error=str(exc))

    # ── queries ─────────────────────────────────────────────────────────────

    def dirty(self) -> list[Inode]:
        return [i for i in self._inodes.values() if i.dirty]

    def status(self) -> list[Inode]:
        return list(self._inodes.values())

    def get(self, path: str) -> Inode | None:
        return self._inodes.get(path)

    def reset(self) -> None:
        self._inodes.clear()

def _md5(data: bytes) -> str:
    return hashlib.md5(data).hexdigest()


Now I'll make all the changes. Let me start with Task 1:

1. Add `SyncPolicy` to `workspace/sync.py`
2. Remove from `types.py`
3. Update `workspace/__init__.py`
4. Update `mirage/__init__.py`
5. Update all 18 import sites

Let me do them all now.


**Task 1: Add `SyncPolicy` to `workspace/sync.py`**


Edit

import hashlib
import time

from mirage.backend.base import BaseBackend
from mirage.types import Inode, SyncResult

import hashlib
import time
from enum import Enum

from mirage.backend.base import BaseBackend
from mirage.types import Inode, SyncResult

class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"


The file /Users/agent/strukto/mirage/mirage/workspace/sync.py has been updated successfully.

import hashlib
import time
from enum import Enum

from mirage.backend.base import BaseBackend
from mirage.types import Inode, SyncResult

class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"

import hashlib
import time

from mirage.backend.base import BaseBackend
from mirage.types import Inode, SyncResult

class DirtyTracker:
    """
    Tracks which virtual paths have local changes that haven't been synced
    to their backing backend.

    Lifecycle:
        on_read()  — record baseline remote checksum (not dirty)
        on_write() — update local checksum, mark dirty=True
        on_sync()  — upload to backend, clear dirty flag
    """

    def __init__(self) -> None:
        self._inodes: dict[str, Inode] = {}

    # ── event hooks ─────────────────────────────────────────────────────────

    def on_read(self, path: str, data: bytes, mount: str) -> None:
        checksum = _md5(data)
        if path in self._inodes:
            inode = self._inodes[path]
            inode.remote_checksum = checksum
            inode.checksum = checksum
            inode.size = len(data)
            inode.dirty = False
        else:
            self._inodes[path] = Inode(
                virtual_path=path,
                backend_mount=mount,
                checksum=checksum,
                size=len(data),
                remote_checksum=checksum,
                dirty=False,
            )

    def on_write(self, path: str, data: bytes, mount: str) -> None:
        checksum = _md5(data)
        if path in self._inodes:
            inode = self._inodes[path]
            inode.checksum = checksum
            inode.size = len(data)
            inode.dirty = True
        else:
            self._inodes[path] = Inode(
                virtual_path=path,
                backend_mount=mount,
                checksum=checksum,
                size=len(data),
                remote_checksum=None,
                dirty=True,
            )

    def on_delete(self, path: str) -> None:
        if path in self._inodes:
            self._inodes[path].dirty = True
            self._inodes[path].checksum = None
            self._inodes[path].size = None

    def on_sync(self, virtual_path: str, backend_path: str, data: bytes | None,
                backend: BaseBackend) -> SyncResult:
        """
        Upload `data` to backend at `backend_path`. Pass None for deletions.
        `virtual_path` tracks the inode; `backend_path` goes to the backend.
        Returns a SyncResult describing the outcome.
        """
        inode = self._inodes.get(virtual_path)
        op = "delete" if data is None else ("create" if (
            inode and inode.remote_checksum is None) else "modify")
        t0 = time.monotonic()
        try:
            if data is None:
                backend.unlink(backend_path)
            else:
                backend.put(backend_path, data)
            duration_ms = int((time.monotonic() - t0) * 1000)
            checksum = _md5(data) if data is not None else None
            if inode:
                inode.remote_checksum = checksum
                inode.dirty = False
            return SyncResult(path=virtual_path,
                              op=op,
                              status="ok",
                              bytes=len(data) if data else None,
                              duration_ms=duration_ms)
        except Exception as exc:
            duration_ms = int((time.monotonic() - t0) * 1000)
            return SyncResult(path=virtual_path,
                              op=op,
                              status="error",
                              duration_ms=duration_ms,
                              error=str(exc))

    # ── queries ─────────────────────────────────────────────────────────────

    def dirty(self) -> list[Inode]:
        return [i for i in self._inodes.values() if i.dirty]

    def status(self) -> list[Inode]:
        return list(self._inodes.values())

    def get(self, path: str) -> Inode | None:
        return self._inodes.get(path)

    def reset(self) -> None:
        self._inodes.clear()

def _md5(data: bytes) -> str:
    return hashlib.md5(data).hexdigest()


**Remove `SyncPolicy` from `types.py`:**


class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"

class MountMode(str, Enum):


<tool_use_error>File has not been read yet. Read it first before writing to it.</tool_use_error>

Error: File has not been read yet. Read it first before writing to it.


I already read the file, but the tool is requiring me to read it again. Let me read it again.

Actually, I did read `types.py` earlier in this conversation. But the tool still says I haven't read it. This might be because some time has passed and the file was modified. Let me re-read it.


class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"

class MountMode(str, Enum):


The file /Users/agent/strukto/mirage/mirage/types.py has been updated successfully.

from enum import Enum

from pydantic import BaseModel, ConfigDict, Field

class FileType(str, Enum):
    DIRECTORY = "directory"
    TEXT = "text"
    BINARY = "binary"
    JSON = "json"
    CSV = "csv"
    IMAGE_PNG = "image/png"
    IMAGE_JPEG = "image/jpeg"
    IMAGE_GIF = "image/gif"
    ZIP = "application/zip"
    GZIP = "application/gzip"
    PDF = "application/pdf"

class CostLevel(str, Enum):
    CHEAP = "cheap"
    PARTIAL = "partial"
    EXPENSIVE = "expensive"
    NETWORK = "network"

class FileStat(BaseModel):
    model_config = ConfigDict(frozen=True)

    name: str
    size: int | None = None
    modified: str | None = None
    type: FileType | None = None
    extra: dict = Field(default_factory=dict)

class SyncPolicy(str, Enum):
    STAGED = "staged"
    IMMEDIATE = "immediate"
    MANUAL = "manual"

class MountMode(str, Enum):
    READ = "read"
    WRITE = "write"
    EXEC = "exec"

class RuntimeType(str, Enum):
    MEMORY = "memory"
    LOCAL = "local"
    REMOTE = "remote"

class BackendType(str, Enum):
    MEMORY = "memory"
    LOCAL = "local"
    S3 = "s3"
    R2 = "r2"
    HTTP = "http"
    HTTPS = "https"

class Inode(BaseModel):
    virtual_path: str
    backend_mount: str
    checksum: str | None = None
    size: int | None = None
    remote_checksum: str | None = None
    dirty: bool = False

class SyncResult(BaseModel):
    model_config = ConfigDict(frozen=True)

    path: str
    op: str
    status: str
    remote: str | None = None
    bytes: int | None = None
    duration_ms: int = 0
    error: str | None = None

class TransferStats(BaseModel):
    bytes_read: int = 0
    bytes_written: int = 0
    read_ops: int = 0
    write_ops: int = 0
    cache_hits: int = 0
    cache_misses: int = 0
    total_read_ms: int = 0
    total_write_ms: int = 0

class CommandStats(BaseModel):
    total_commands: int = 0
    total_errors: int = 0
    last_command: str = ""
    last_timestamp: str = ""
    command_counts: dict[str, int] = Field(default_factory=dict)

class FilePayload(BaseModel):
    checksum: str
    data: bytes | None = None

class RemoteCommandOptions(BaseModel):
    max_file_size: str = "100MB"
    cache: str = "enabled"

class CommandResult(BaseModel):
    model_config = ConfigDict(arbitrary_types_allowed=True)

    stdout: str = ""
    output_files: dict[str, bytes] = {}


**Update `workspace/__init__.py` and `mirage/__init__.py`:**


from mirage.workspace.workspace import Workspace

__all__ = ["Workspace"]

from mirage.workspace.sync import SyncPolicy
from mirage.workspace.workspace import Workspace

__all__ = ["Workspace", "SyncPolicy"]


     1→from mirage.workspace.workspace import Workspace
     2→
     3→__all__ = ["Workspace"]
     4→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


from mirage.workspace.workspace import Workspace

__all__ = ["Workspace"]

from mirage.workspace.sync import SyncPolicy
from mirage.workspace.workspace import Workspace

__all__ = ["Workspace", "SyncPolicy"]


The file /Users/agent/strukto/mirage/mirage/workspace/__init__.py has been updated successfully.

from mirage.workspace.workspace import Workspace

__all__ = ["Workspace"]

from mirage.workspace.sync import SyncPolicy
from mirage.workspace.workspace import Workspace

__all__ = ["Workspace", "SyncPolicy"]

+from mirage.workspace.sync import SyncPolicy


from mirage.types import FileStat, Inode, MountMode, SyncPolicy, SyncResult

from mirage.types import FileStat, Inode, MountMode, SyncResult
from mirage.workspace import SyncPolicy


The file /Users/agent/strukto/mirage/mirage/__init__.py has been updated successfully.

from mirage.types import FileStat, Inode, MountMode, SyncResult
from mirage.workspace import SyncPolicy

from mirage.backend.local import LocalBackend, MemoryBackend
from mirage.types import FileStat, Inode, MountMode, SyncPolicy, SyncResult
from mirage.workspace import Workspace
from mirage.workspace.consistency import ConsistencyPolicy

__all__ = [
    "Workspace",
    "MemoryBackend",
    "LocalBackend",
    "ConsistencyPolicy",
    "FileStat",
    "Inode",
    "MountMode",
    "SyncPolicy",
    "SyncResult",
]

-from mirage.types import FileStat, Inode, MountMode, SyncPolicy, SyncResult

+from mirage.types import FileStat, Inode, MountMode, SyncResult

+from mirage.workspace import SyncPolicy


Now update all the internal mirage modules that import `SyncPolicy` from `mirage.types`. Let me read each one first:


     1→from __future__ import annotations
     2→
     3→import time
     4→
     5→from mirage.backend.base import BaseBackend
     6→from mirage.backend.filetype import guess_type
     7→from mirage.types import (FileStat, Inode, MountMode, SyncPolicy, SyncResult,
     8→                          TransferStats)
     9→from mirage.workspace.cache import LRUCache
    10→from mirage.workspace.consistency import ConsistencyPolicy, is_fresh
    11→from mirage.workspace.mount import MountRegistry
    12→from mirage.workspace.sync import DirtyTracker
    13→
    14→
    15→class _PathLock:

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

from __future__ import annotations

import time

from mirage.backend.base import BaseBackend
from mirage.backend.filetype import guess_type
from mirage.types import (FileStat, Inode, MountMode, SyncPolicy, SyncResult,
                          TransferStats)
from mirage.workspace.cache import LRUCache
from mirage.workspace.consistency import ConsistencyPolicy, is_fresh
from mirage.workspace.mount import MountRegistry
from mirage.workspace.sync import DirtyTracker

class _PathLock: