Naming inconsistency: Skills stored in 'commands' directory

Description

There is a naming inconsistency between how user-defined skills are stored vs. how they are presented in the UI/system.

Current Behavior

• User-defined skills are stored in ~/.claude/commands/ directory
• However, they appear in the system prompt as "skills":

```
The following skills are available for use with the Skill tool:

• boot-vek385: Boot a VEK385 board...
• save-session: Save current session summary...

```

• They are invoked using the Skill tool, not a "Command" tool

Expected Behavior

The storage location should match the terminology used in the UI:

• Either rename the directory from commands/ to skills/
• Or clarify the distinction between commands and skills in documentation

Why This Matters

When users want to create or manage their custom skills, they look for a skills/ directory but find commands/ instead. This creates confusion about:

1. Where to store new skills
2. Whether "commands" and "skills" are the same thing or different concepts
3. The mental model of how Claude Code extensibility works

Environment

• Claude Code CLI
• Storage location: ~/.claude/commands/