memory-md-directive-only-not-inventory

MEMORY.md must contain ONLY behavioral directives and cross-reference pointers — never inventory data (hook paths, tool counts, Docker versions, CLI paths). The 190→126 line refactor extracted 22 hooks to hooks-registry.md and 6 tool-intelligence rules to tool-intelligence.md. Inventory in MEMORY.md violates Zero Redundancy and inflates toward truncation cliff. Architecture decision: index = directions on HOW to behave, not WHAT exists.