From 3461eec520c8f64e0b564c313795f92b8a897789 Mon Sep 17 00:00:00 2001 From: Meta Vens Date: Fri, 18 Sep 2026 19:04:06 +0200 Subject: [PATCH] Rule the panel rim held, and record what play showed Co-Authored-By: Claude Opus 5 --- docs/shield-panel-cut.md | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/docs/shield-panel-cut.md b/docs/shield-panel-cut.md index 12fd5b9f0..ee9373f46 100644 --- a/docs/shield-panel-cut.md +++ b/docs/shield-panel-cut.md @@ -109,6 +109,21 @@ Q1 (does the first landing have to fracture) is **still open** and still first; > Two yields with a background run still going cost a round trip each; the wait rule now > names the mechanism (`~/.claude/skills/eureka/references/briefs.md`). +> **Ruling R7 (operator, 2026-09-18): a panel's rim is held, not free.** "held is probably +> nicer even if free is more accurate". The emitters projecting the panel hold its edge, so the +> rim stops being a tension source (`ShieldSim.compute`'s `openW` ghost term) and the only +> spall left comes from the shot itself through the plate. Cracks radiate from the impact and +> shards leave where the hit landed, and panel size stops being a fragility multiplier. +> **A broken cell's faces stay free**: that reflection is the dicing cascade and it survives. +> +> Operator play evidence, 2026-09-18, on the rigged scene: a panel spawns, is reused, and +> spiderwebs, but only shatters when hits are spammed near the rim — which is the free edge +> reflecting compression back as tension exactly as designed, and confirms the wave, the +> reflection and the temper erosion all work. The interior spall source (the through-thickness +> echo) is too weak or mistimed to compete. That, D9 (velocity unclamped, so hard hits saturate +> in compression) and D10 (fracture evaluated once per frame while the wave integrates several +> times) are Cut 5's targets. + ## 1. What the repo actually has today The re-probe found the thing the first pass missed: **the ellipsoid envelope already exists