Two agent-visibility fixes surfaced diagnosing a 20-minute gpt-5.5 step and an
'agents never disappear' report.
A) Codex Responses path streamed no reasoning, so a long thinking phase produced
zero visible output and read as a hang (the activity clock never advanced).
Root cause: the request never asked for a reasoning summary and the parser had
no case for reasoning deltas. Now request reasoning.summary="auto" and forward
response.reasoning_summary_text.delta as StreamEventReasoning — the existing TUI
handler renders it live and refreshes the activity clock.
B) A finished swarm member stayed in the AGENTS panel until the whole turn ended.
Now it drops once ITS OWN task completes (fade over the linger window, then
remove), independent of the overall run — matching how finished specialists
already behave. Running members and mid-flight collect are unaffected.
Gnanam
cd7c2736dc