Add one-line imperative at the top of the Session Protocol:
'On receiving your first message — before writing any response text —
call get_state_summary() immediately.'
Previously Claude would wait for a substantive prompt before acting.
Now any first message (including 'start', 'go', or just Enter) triggers
the tool call immediately, after which the First Session Protocol takes over.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>