What probably matters to youSection of the release
What
A truncating resume can now declare which turn it intends to discard, and is refused if the discarded range contains anything that does not belong to that turn.
Details
registered as --resume-drops-turn <message id> with help text "declare the prompt uuid of the turn the truncating resume intends to discard; the resume is refused if the discarded range contains anything not attributable to that turn"
refusal triggers on absorbed queued messages, compaction summaries, externally-sourced entries and task notifications; the message names a per-entry reason such as a range containing a compaction summary or a non-furniture attachment
startup exits with Error: --resume-drops-turn requires --resume-session-at if used alone; a refused resume reports tengu_session_resumed with failure_reason drop_guard_refused
the option is hideHelp'd and, like --resume-session-at, ignored outside print mode; the SDK subprocess transport forwards it and the arg-quoting tables accept its value
Usage
claude -p "continue" --resume-session-at <uuid> --resume-drops-turn <prompt uuid>
Evidence
Resume rejected by --resume-drops-turn:, --resume-drops-turn requires --resume-session-at
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
