/plan in agent-overview mode silently discards typed input on error, with no recovery trail
Description
Typing a /plan-prefixed message while in "agent overview" mode (the
multi-agent/FleetView screen, not a single conversation) produces an error
that the mode doesn't support entering plan mode there. The message text
itself is discarded — it is not shown again, not restored to the input box,
and not persisted anywhere.
Repro
- Open agent overview mode (FleetView-style multi-agent screen).
- Type a message starting with
/plan ...and submit. - Get an error that plan mode isn't supported in this mode.
- The typed text is gone — no way to recover or resubmit it.
Impact
Lost a non-trivial amount of typed planning content with no way to recover
it. Checked ~/.claude/history.jsonl (CLI input history), session
transcripts, daemon.log, and telemetry failed-event logs — the rejected
input isn't captured in any of them, so there's no log-based recovery path
either.
Expected behavior
Either: (a) /plan should be disabled/stripped rather than erroring, with
the rest of the message still sent as a normal prompt; or (b) on error, the
typed text should be preserved in the input box (or in history.jsonl) so it
can be recovered/resubmitted.