test(physics): characterise mass-ratio + no-CCD envelope (SG-MR3, SG-X5)#184
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Pin the two TGS-Soft operating limits the W9 review flagged as undocumented and ungated. Both stay finite/stable — they are accuracy/coverage gaps, not bugs. - SG-MR3: at a ~100:1 mass ratio a crushed light box settles a small, bounded distance into the floor (~1.4px, measured here) and its centre never sinks below the surface. Past ~100:1 the velocity-capped soft push-out (maxBiasVelocity) lets penetration grow sharply (~6px at 500:1, fully through by ~5000:1). Pins the envelope edge so a regression into deep penetration at 100:1 is caught. - SG-X5: a body moving farther than the floor thickness in one frame tunnels through it (detection runs once per frame — no CCD) but stays finite. Pins the finiteness contract for fast bodies. Document the operating envelope (mass-ratio ceiling, no-CCD tunnelling, load-bearing subStepCount >= 2) on PhysicsWorld and tighten the subStepCount option doc. No solver behaviour change; physics is not in build-api so there is no api-mdx delta. Gates green: physics test (90 passed), typecheck, lint, format, docs:api:check. No version bump / tag / publish.
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Was
Schließt die zwei optionalen Solver-Characterization-Lücken aus dem W9-Review (
v015-verification.json→concerns): die zwei dokumentierten TGS-Soft-Grenzen, die bislang kein Gate hatten. Beide bleiben finit/stabil — es sind Accuracy/Coverage-Lücken, keine Bugs. Kein Solver-Verhalten wird geändert (reine Characterization-Tests + Doku).Gates (
dynamics.test.ts)maxBiasVelocity) die Penetration wachsen (≈6px@500:1, komplett durch bei ~5000:1). Pinnt die Envelope-Kante → eine Regression in tiefe Penetration bei 100:1 wird gefangen.Doku
PhysicsWorld-Klassendoku um einen „Operating envelope"-Abschnitt erweitert (Mass-Ratio-Decke, No-CCD-Tunneling, load-bearingsubStepCount ≥ 2), je mit Gate-Referenz;subStepCount-Option-Doc verschärft (Werte < 2 degradieren Stacking sichtbar → Default nicht für Perf senken). Physics ist nicht inbuild-api→ kein api-mdx-Delta (docs:api:check grün).Gates lokal grün
physics
test(90 passed),typecheck,lint,format:check,docs:api:check. Kein Versions-Bump/Tag/Publish.