Gmail Agent Skill

First-Run Detection (run on every invocation)

Before executing any email operation, check if gmail-agent is installed:

GMAIL_AGENT_DIR="${GMAIL_AGENT_DIR:-$HOME/gmail-agent}"
ls "$GMAIL_AGENT_DIR/run.sh" 2>/dev/null

If not found: Tell the user gmail-agent is not set up yet, then run the installer:

bash ~/.claude/skills/gmail/scripts/install.sh

This handles everything: clone → Google OAuth credentials → Anthropic API key → compile → Gmail authorization. Do not proceed with email operations until it completes.