Hard Eng Learn

• Input = current task + observed attempts/results or explicit decision/steering. Reuse its authorization + participation mode. Hook checkpoints request this judgment; they do not establish recurrence, a cause, or permission to change other projects/global memory.
• Outcome = verified prevention at its narrowest owner, an applicable decision record, or an explicit no-op/blocker. Keep proof + pending work in the same plan; no learning ledger or new task status. Existing tests/docs that already preserve the lesson need no duplicate record.