- build_api_messages reads agent._current_turn_timestamp directly: a caller that skipped the
turn prologue now raises instead of silently falling back to per-request wall time, which
would re-create the mid-turn drift the fix removes. Only production caller
(assemble_api_request) runs after _reset_per_turn_agent_state; cross-reference to the
tripwire _inflight_turn_started so the two clocks are not "unified" by mistake.
- is_dangerous_confirmation lowercases once instead of once per pattern (now on the per-request path).
- Tests: one _send(idx=) helper instead of three spellings of the builder call; the
untrustworthy-stamp contract is its own test.
5c4c31cf4d