Feature request: Auto-exit after skill/command completion

Summary

When using a skill (slash command) as a session-ending routine (e.g., /handover), there's no way to automatically exit the session after the skill completes. Currently, users must manually run /exit after the skill finishes.

Use Case

I use a custom /handover skill to save session notes to Obsidian before ending a session. Ideally, the session would auto-terminate after the handover completes, making it a single-step shutdown routine instead of two steps (/handover → /exit).

Proposal

Any of the following would solve this:

1. exitAfter option in skill definition — A flag in the skill config (e.g., exitAfter: true) that tells Claude Code to exit after the skill completes.
2. PostSkill hook event — A new hook event that fires after a skill finishes, allowing users to run arbitrary shell commands (including terminating the session).
3. --exit-after flag — A CLI flag or in-session option to signal that the current operation should be the last before exit.

Current Workaround

Run the skill, confirm completion, then manually type /exit. This works but adds an extra step to what should be a seamless shutdown routine.

Environment

• Claude Code CLI
• macOS