With DISPATCH_AGENT autonomous=true in the agent registry, the assignment-failure
path sends a real customer message. It would have sent
"Delay alert: Order 36 may arrive later than expected. New ETA: {new_eta}"
with customer_id "unknown": the DELAYED template names {new_eta} but DispatchAgent
supplied only order_id, and it has no customer id to give.
- _send_via_channel refuses to send when any {placeholder} survives substitution
(or the template is missing), logs which variables the caller omitted, and
records a failed notification. Silence beats a broken message.
- customer_id is omitted from the payload when it is absent or "unknown" rather
than sent literally; the backend resolves the recipient from order_id.
- DispatchAgent supplies new_eta "being confirmed" — honest, since no ETA exists
at assignment-failure time.
- Tests: the old bug is refused, a complete payload renders clean, the id is
omitted/passed correctly, and DispatchAgent's vars satisfy the template.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012AJLYcbTHCe45fyFnMfEin
