Wire MEMORY.md + soul.md into the thinking loop so each heartbeat
is grounded in identity and recent context, breaking repetitive loops.
Pre-hook: _load_memory_context() reads hot memory first (changes each
cycle) then soul.md (stable identity), truncated to 1500 chars.
Post-hook: _update_memory() writes a "Last Reflection" section to
MEMORY.md after each thought so the next cycle has fresh context.
soul.md is read-only from the heartbeat — never modified by it.
All hooks degrade gracefully and never crash the heartbeat.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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