When a team member task errored, the failure stayed in the member's
internal state and the main/coordinator agent's wait/status loop
kept polling indefinitely — the run stalled with no visible error.
Emit a structured `member_error` peer_message into the team mailbox
on member error transition, naming the member and including the
underlying error text so the main agent's next team_status (or
pending-message read) returns a terminal failure instead of an
empty in-progress poll.
Regression test asserts the failure is visible in the main agent's
view after a member task errors mid-execution.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Handle OpenCode session events that carry the session ID under properties.info.id or properties.info.sessionID so background tasks and continuation hooks do not miss idle/error/delete events.
Add regression coverage for nested session.idle events completing background tasks and waking continuation hooks.
YeonGyu-Kim