[BUG] Claude Code is unable to see Personal Commands (~/.claude/commands/) for automatic invocation in it's SlashCommand Tool

Bug Description

Claude Code can only see project-level slash commands (from .claude/commands/) in its internal SlashCommand tool's available commands list. User-level commands from ~/.claude/commands/ are completely invisible to Claude until they are actually invoked.

IMPORTANT: This is NOT about the user's slash command autocomplete UI. When users type /, they correctly see both project-level AND user-level commands.

Impact

This creates confusion because:

1. Claude doesn't know user-level commands exist - They're not in Claude's SlashCommand tool manifest
2. Claude may suggest incorrect/non-existent commands when users ask for help
3. Claude cannot proactively suggest relevant user-level commands
4. Users expect Claude to be aware of all available commands (both project and user-level)

Reproduction Steps

1. Create a user-level slash command in ~/.claude/commands/ (e.g., /update-subtask)
2. Ask Claude to list available slash commands or ask it about updating a subtask
3. Observe that Claude only shows project-level commands marked with (project)
4. Invoke the user-level command (e.g., by saying "update subtask 1.25")
5. Claude will not match the request to any command in it's SlashCommand tool, since it wasn't in the visible list

Expected Behavior

Claude should see both project-level and user-level slash commands in the available commands list, with clear indication of their scope:

• User-level commands marked with (user) or (global)
• Project-level commands marked with (project)

Actual Behavior

Claude only sees project-level commands. When a user-level command is invoked, Claude receives the expanded command documentation but was previously unaware of its existence.

Example

In the conversation, Claude saw these project commands:

• /taskmaster:enhance-subtask (project)
• /implement-skill (project)
• etc.

But the user had a /update-subtask command at the user level that Claude couldn't see until it was triggered.

System Information

• Platform: macOS (Darwin 25.1.0)
• Model: Claude Sonnet 4.5
• Working directory: Project with both user-level and project-level slash commands

Suggested Fix

Update the SlashCommand tool's available commands list to include both:

1. Project-level commands from {project}/.claude/commands/
2. User-level commands from ~/.claude/commands/

With clear labeling to distinguish between scopes (e.g., (user) vs (project)).