KCAE.MEMORY:4.5 - Expire, invalidate and learn without rewriting the past

Use dependency changes from KCAE.CHANGE to reopen stored connections. Distinguish changed source content, changed case facts, changed authority, changed model and an expired receiving opportunity. A newer rule can invalidate current advice without falsifying the earlier historical record. Correct a past factual error with its grounds; do not silently relabel the original observation to match the new interpretation.

Periodically inspect whether retained material is still permitted and useful. Remove obsolete prompts and expired copies. Preserve only the evidence needed for any legitimate historical or accountability use. Measure the effort saved by reuse against maintenance, false suggestions and exposure. Memory that produces more unhelpful work than it saves should be narrowed or removed.