session-learnings-intake-test-behavioral-not-informational

The correct gate for session-learnings.md entries is: ‘Will this make a future session behave differently?’ If yes, capture. If no (look-up-able from docs, historical origin, derivable from current state), discard. REFERENCE-tagged entries are the primary failure mode — 9 of 14 REFERENCE entries failed this test and were removed. The system gets smarter, not bigger.