Feature Request: Auto-load slash commands on startup

It would be great if Claude Code could automatically load a slash command on startup, either through:

• A command line flag like --slash-command /alex
• Or by reading persona instructions from CLAUDE.md
• Or a config option to set a default slash command

Use case: I have a custom persona (/alex) that I want to use every time I start Claude Code.

I've already tried several approaches that didn't work:

• Created an alias claude --slash-command /alex but the flag doesn't exist
• Put my persona content in CLAUDE.md, which is read (I get the "large file" warning) but only serves as reference, not activation
• Tried piping commands (echo '/alex' | claude) but this causes terminal/raw mode errors
• Attempted various bash workarounds but Claude Code requires interactive terminal mode

Currently I have to manually type /alex every time I start Claude Code. An auto-load feature would significantly improve the workflow for users with custom personas or commands they use consistently.

Thank you for considering this feature!