- ValidateTurn no longer errors on thinking-only responses, deferring to
ShouldRetryEmptyOutput which now also covers thinking-only outputs.
- Empty output retry uses multi-turn follow-up with a regeneration prompt
suffix and parent_message_id in the same DeepSeek session.
- Centralize StripReferenceMarkersEnabled into textclean package to
eliminate duplicated hardcoded booleans across 4 protocol handlers.
- Log a deprecation warning when the legacy "compat" config key is used.
- Document thinking-only retry and reference marker stripping in API.md.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>