The --chain flag was not checked in plan-phase's auto-advance guard,
causing the ephemeral _auto_chain_active config to be cleared when
discuss-phase chained into plan-phase. This broke the discuss→plan→
execute auto-advance pipeline, requiring manual intervention at each
transition.
Two fixes applied to plan-phase.md step 15:
- Sync-flag guard now checks for both --auto AND --chain before
clearing _auto_chain_active (matching discuss-phase's pattern)
- Added chain flag persistence (config-set _auto_chain_active true)
before auto-advancing, handling direct invocation without prior
discuss-phase
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
