refactor(version): support both local and installed package modes

- Update __version__.py to handle both local development and installed
  package scenarios using importlib.metadata fallback
- Add fallback imports in mcp_server/__init__.py and
  slash_commands/generators.py to use importlib.metadata when
  __version__ is not available
- Include __version__.py in wheel package via force-include

Enables the package to work correctly when installed via uvx --from
git+ URL or from PyPI, while maintaining backward compatibility
with local development.

Author: ryderstorm

__version__.py

@@ -6,15 +6,21 @@
 from __future__ import annotations
 
 import tomllib
+from importlib.metadata import version as get_package_version
 from pathlib import Path
 
 
 def _get_version() -> str:
     """Get the version from pyproject.toml."""
     pyproject_path = Path(__file__).parent / "pyproject.toml"
-    with pyproject_path.open("rb") as f:
-        data = tomllib.load(f)
-    return data["project"]["version"]
+    if pyproject_path.exists():
+        # Local development mode
+        with pyproject_path.open("rb") as f:
+            data = tomllib.load(f)
+        return data["project"]["version"]
+    else:
+        # Installed package mode
+        return get_package_version("spec-driven-development-mcp")
 
 
 __version__ = _get_version()

mcp_server/__init__.py

@@ -8,7 +8,13 @@
 from starlette.requests import Request
 from starlette.responses import PlainTextResponse
 
-from __version__ import __version__  # noqa: F401
+try:
+    from __version__ import __version__
+except ImportError:
+    # Fallback for when installed as a package
+    from importlib.metadata import version
+
+    __version__ = version("spec-driven-development-mcp")
 
 from .config import config
 from .prompts_loader import register_prompts

pyproject.toml

@@ -40,6 +40,7 @@ packages = ["mcp_server", "prompts", "slash_commands"]
 
 [tool.hatch.build.targets.wheel.force-include]
 "server.py" = "server.py"
+"__version__.py" = "__version__.py"
 
 
 # --- Ruff (linter + formatter) ---

slash_commands/generators.py

@@ -8,7 +8,14 @@
 import tomli_w
 import yaml
 
-from __version__ import __version__
+try:
+    from __version__ import __version__
+except ImportError:
+    # Fallback for when installed as a package
+    from importlib.metadata import version
+
+    __version__ = version("spec-driven-development-mcp")
+
 from mcp_server.prompt_utils import MarkdownPrompt, PromptArgumentSpec
 from slash_commands.config import AgentConfig, CommandFormat