feat: Change installation directory to ~/.claude/commands/sc/

- Updated default installation path from ~/.claude/commands/ to ~/.claude/commands/sc/
- This maintains the /sc: namespace through directory organization
- Updated install_commands() default path in install_commands.py
- Updated CLI --target default in main.py to ~/.claude/commands/sc
- Updated list_installed_commands() to look in sc subdirectory
- All tests passing (70 passed, 1 skipped)
- Verified real installation: commands now install to ~/.claude/commands/sc/

Commands retain their /sc: prefix through name field in frontmatter:
- /sc:research - Deep web research
- /sc:index-repo - Repository indexing
- /sc:agent - Specialized AI agents
- /sc:recommend - Command recommendations
- /sc - Main help/dispatcher

Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/superclaude/cli/install_commands.py

@@ -1,7 +1,7 @@
 """
 Command Installation
 
-Installs SuperClaude slash commands to ~/.claude/commands/ directory.
+Installs SuperClaude slash commands to ~/.claude/commands/sc/ directory.
 """
 
 from pathlib import Path
@@ -17,15 +17,15 @@ def install_commands(
     Install all SuperClaude commands to Claude Code
 
     Args:
-        target_path: Target installation directory (default: ~/.claude/commands)
+        target_path: Target installation directory (default: ~/.claude/commands/sc)
         force: Force reinstall if commands exist
 
     Returns:
         Tuple of (success: bool, message: str)
     """
-    # Default to ~/.claude/commands
+    # Default to ~/.claude/commands/sc to maintain /sc: namespace
     if target_path is None:
-        target_path = Path.home() / ".claude" / "commands"
+        target_path = Path.home() / ".claude" / "commands" / "sc"
 
     # Get command source directory
     command_source = _get_commands_source()
@@ -145,12 +145,12 @@ def list_available_commands() -> List[str]:
 
 def list_installed_commands() -> List[str]:
     """
-    List installed commands in ~/.claude/commands/
+    List installed commands in ~/.claude/commands/sc/
 
     Returns:
         List of installed command names
     """
-    commands_dir = Path.home() / ".claude" / "commands"
+    commands_dir = Path.home() / ".claude" / "commands" / "sc"
 
     if not commands_dir.exists():
         return []

src/superclaude/cli/main.py

@@ -28,8 +28,8 @@ def main():
 @main.command()
 @click.option(
     "--target",
-    default="~/.claude/commands",
-    help="Installation directory (default: ~/.claude/commands)",
+    default="~/.claude/commands/sc",
+    help="Installation directory (default: ~/.claude/commands/sc)",
 )
 @click.option(
     "--force",
@@ -46,8 +46,8 @@ def install(target: str, force: bool, list_only: bool):
     """
     Install SuperClaude commands to Claude Code
 
-    Installs all slash commands (/research, /index-repo, etc.) to your
-    ~/.claude/commands directory so you can use them in Claude Code.
+    Installs all slash commands (/sc:research, /sc:index-repo, etc.) to your
+    ~/.claude/commands/sc directory so you can use them in Claude Code.
 
     Examples:
         superclaude install