fix: address remaining CodeRabbit AI review comments

- Fix coverage exclude pattern for __main__ guard in pyproject.toml
- Add PackageNotFoundError handling for version fallback in generators.py
- Store only basename in source_path to avoid leaking absolute paths
- Fix agents=None to default to all supported agents in writer.py

These changes address 4 remaining CodeRabbit AI review comments that were not
covered in the previous fixes.

Author: ryderstorm

pyproject.toml

@@ -85,7 +85,7 @@ exclude_lines = [
     "def __repr__",
     "raise AssertionError",
     "raise NotImplementedError",
-    "if __name__ == .__main__.:",
+    "if __name__ == \"__main__\":",
     "if TYPE_CHECKING:",
     "class .*\\bProtocol\\):",
     "@(abc\\.)?abstractmethod",

slash_commands/generators.py

@@ -11,10 +11,13 @@
 try:
     from __version__ import __version__
 except ImportError:
-    # Fallback for when installed as a package
-    from importlib.metadata import version
+    # Fallback when installed as a package
+    from importlib.metadata import PackageNotFoundError, version
 
-    __version__ = version("spec-driven-development-mcp")
+    try:
+        __version__ = version("spec-driven-development-mcp")
+    except PackageNotFoundError:
+        __version__ = "0.0.0"
 
 from mcp_server.prompt_utils import MarkdownPrompt, PromptArgumentSpec
 from slash_commands.config import AgentConfig, CommandFormat
@@ -213,7 +216,8 @@ def _build_meta(self, prompt: MarkdownPrompt, agent: AgentConfig) -> dict:
             "command_format": agent.command_format.value,
             "command_file_extension": agent.command_file_extension,
             "source_prompt": prompt.name,
-            "source_path": str(prompt.path),
+            # Store only basename to avoid leaking absolute paths
+            "source_path": prompt.path.name,
             "version": __version__,
             "updated_at": datetime.now(UTC).isoformat(),
         })

slash_commands/writer.py

@@ -87,7 +87,7 @@ def __init__(
             overwrite_action: Global overwrite action to apply. If None, will prompt per file.
         """
         self.prompts_dir = prompts_dir
-        self.agents = agents or []
+        self.agents = agents if agents is not None else list_agent_keys()
         self.dry_run = dry_run
         self.base_path = base_path or Path.cwd()
         self.overwrite_action = overwrite_action