perf(cli): lazy-load server, pathspec, and protocol imports (cocoindex-io#164)

Cuts `ccc status` cold-cache startup from ~0.5-0.9s to ~0.15s.

- `cocoindex_code/__init__.py`: replace eager `from .server import main`
  with a PEP 562 `__getattr__` so importing the package no longer pulls
  `mcp.server.fastmcp` (~300ms). The `cocoindex-code = "cocoindex_code:main"`
  console script still resolves.
- `settings.py`: defer `from pathspec import GitIgnoreSpec` into
  `load_gitignore_spec()` (only called by indexer/daemon).
- `cli.py`: move protocol type-only imports under `TYPE_CHECKING`
  (safe with `from __future__ import annotations`); lazy-import
  `DaemonStartError` inside the wrapper and `DoctorCheckResult` next to
  the existing lazy `client` import.

Also drops a stale paragraph from CLAUDE.md.

Author: georgeh0

CLAUDE.md

@@ -12,8 +12,6 @@ uv run pytest tests/    # Run Python tests
 
 ## Code Conventions
 
-The full review-time detection checklist (with worked examples and post-hoc smell patterns) lives in the [`/review-changes`](~/.claude/skills/review-changes/SKILL.md) skill — run it on uncommitted changes before landing a non-trivial PR. The rules below are write-time mnemonics; project-specific ones (Internal/External modules) stay here in full.
-
 ### Internal vs External Modules
 
 We distinguish between **internal modules** (under packages with `_` prefix, e.g. `_internal.*` or `connectors.*._source`) and **external modules** (which users can directly import).

src/cocoindex_code/__init__.py

@@ -1,10 +1,23 @@
 """CocoIndex Code - MCP server for indexing and querying codebases."""
 
+from __future__ import annotations
+
 import logging
+from typing import TYPE_CHECKING, Any
 
 logging.basicConfig(level=logging.WARNING)
 
 from ._version import __version__  # noqa: E402
-from .server import main  # noqa: E402
+
+if TYPE_CHECKING:
+    from .server import main as main
 
 __all__ = ["main", "__version__"]
+
+
+def __getattr__(name: str) -> Any:
+    if name == "main":
+        from .server import main
+
+        return main
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")

src/cocoindex_code/cli.py

@@ -7,12 +7,18 @@
 import sys
 from collections.abc import Callable
 from pathlib import Path
-from typing import TypeVar
+from typing import TYPE_CHECKING, TypeVar
 
 import typer as _typer
 
-from .client import DaemonStartError
-from .protocol import DoctorCheckResult, IndexingProgress, ProjectStatusResponse, SearchResponse
+if TYPE_CHECKING:
+    from .protocol import (
+        DoctorCheckResult,
+        IndexingProgress,
+        ProjectStatusResponse,
+        SearchResponse,
+    )
+
 from .settings import (
     DEFAULT_ST_MODEL,
     EmbeddingSettings,
@@ -104,6 +110,8 @@ def _catch_daemon_start_error(func: _F) -> _F:
 
     @functools.wraps(func)
     def wrapper(*args: object, **kwargs: object) -> object:
+        from .client import DaemonStartError
+
         try:
             return func(*args, **kwargs)
         except DaemonStartError as e:
@@ -204,7 +212,7 @@ def _on_progress(progress: IndexingProgress) -> None:
         except RuntimeError as e:
             live.stop()
             # Let DaemonStartError propagate to the decorator for consistent handling.
-            if isinstance(e, DaemonStartError):
+            if isinstance(e, _client.DaemonStartError):
                 raise
             _typer.echo(f"Indexing failed: {e}", err=True)
             raise _typer.Exit(code=1)
@@ -401,6 +409,7 @@ def _run_init_model_check(settings_path: Path) -> None:
     from rich.spinner import Spinner as _Spinner
 
     from . import client as _client
+    from .protocol import DoctorCheckResult
 
     err_console = _Console(stderr=True)
     results: list[DoctorCheckResult] = []

src/cocoindex_code/settings.py

@@ -5,10 +5,12 @@
 import os
 from dataclasses import dataclass, field
 from pathlib import Path
-from typing import Any
+from typing import TYPE_CHECKING, Any
 
 import yaml as _yaml
-from pathspec import GitIgnoreSpec
+
+if TYPE_CHECKING:
+    from pathspec import GitIgnoreSpec
 
 # ---------------------------------------------------------------------------
 # Default file patterns (moved from indexer.py)
@@ -391,6 +393,8 @@ def global_settings_mtime_us() -> int | None:
 
 def load_gitignore_spec(project_root: Path) -> GitIgnoreSpec | None:
     """Load a GitIgnoreSpec for the project's ``.gitignore`` if present."""
+    from pathspec import GitIgnoreSpec
+
     gitignore = project_root / ".gitignore"
     if not gitignore.is_file():
         return None