Add a dedicated "Asking questions" section to the errand prompt so the
agent knows it can pause, ask for clarification, and wait for the user
to reply via the UI chat input or `cw errand chat`. Previously the
prompt said "work interactively" with no guidance on the mechanism,
leaving the agent to guess.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>