A Canon-Based Stability Classification of the Three-Body Problem Version 4.7

This paper reports Canon three-body framework version 4.7, which achieves the firstconfirmed detection of marginal instability in the framework’s history. The perturbed figureeight orbit — a 1% position displacement on the stable Chenciner-Montgomery solution —has resisted discrimination from the stable orbit across all previous versions (v1 through v4.6).Version 4.7 resolves this through two innovations: a signed asymmetric drift integrator thataccumulates persistent angular momentum asymmetry across orbital cycles, and a 2-cyclereset mechanism that periodically clears short-term temporal memory while preserving longterm structural memory. The reset forces the Canon engine to re-evaluate orbital periodicityfrom a clean state every two cycles. The perturbed system rebuilds less cleanly after eachreset, producing a measurable E(t) mean separation of 0.52 standard deviations — above thedetection threshold for the first time. The Pythagorean ejection system is classified correctlyon three independent operators: E(t) at 1.07 std, integrated drift at 2.53 std, and reset countat 0 versus 3. All three test systems are now correctly classified.