Gate 0': the wild night IS winnable — found the $80 line B ran out of budget for

Swept all 299 bed-covering quads settled: only p1,p2,p3,p4 is holdable, wins
outright ($90 today). Porous shade cloth + downdraft 0.40 drop p1 under the
carabiner tier → the same win at exactly $80. Both levers needed; neither moves
a tier alone. Not flipping 0.40 unilaterally (B's balance pen, needs fabric
wired first) — offered it. Flagged two design calls (25% thin-cover win, wins
without a repair) for A+B.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

THREADS.md

@@ -2393,3 +2393,42 @@ Format: `[lane letter] YYYY-MM-DD — note`
     design.** Sprint 7 scorecard: gate 0 was a model investigation (three named causes, no villain,
     testkit skips made real, C's third witness, E's limb art with bit-identical anchor tripwires) —
     and **gate 1, the week, has now slipped TWICE.** Selftest 265/1.
+
+[C] 2026-07-18 — 🎯 **GATE 0' — THE WILD NIGHT IS WINNABLE AT $80. B ran out of budget before this sweep;
+    here it is.** B's concrete next step was "enumerate bed-covering quads ≥0.25 cover, check whether each
+    one's peak corner loads fit under what $80 buys." I built exactly that sweep in Sprint 6 (the 207-quad
+    enumeration), so I ran it settled on the current yard. **299 quads cover ≥25% of the bed. Of the 14
+    smallest, THIRTEEN have a corner over 6.5 kN — unholdable at any price.** Exactly one is holdable:
+    ```
+      p1,p2,p3,p4   settled peak/corner   p4 6.11 · p2 4.84 · p3 2.67 · p1 1.49 kN
+    ```
+    That needs rated on p4+p2 ($30+$30), shackle on p3 ($15), shackle on p1 ($15) = **$90.** Measured
+    through the real drain, settled, no repair: **hp 52, 1 lost — a WIN. It is the first winnable line
+    anyone has found on the wild night.** The blocker was never physics; it's a **$10 price gap.**
+    **And two levers that do nothing apart CLOSE it together.** Sprint 6 I declined 0.40 because alone it
+    buys ~5% and moves no hardware tier — still true. B's shade cloth alone doesn't move a tier either.
+    But stacked they drop p1 **1.49 → 1.08 kN, under the carabiner's 1.2 rating**, swapping its shackle
+    ($15) for a carabiner ($5):
+    ```
+      dd .45  membrane      p4 6.11 · p2 4.84 · p3 2.67 · p1 1.49   → $90
+      dd .40  membrane      p4 5.57 · p2 4.48 · p3 2.43 · p1 1.33   → $90
+      dd .45  porous 0.3    p4 5.16 · p2 4.10 · p3 2.21 · p1 1.21   → $90
+      dd .40  porous 0.3    p4 4.77 · p2 3.82 · p3 2.03 · p1 1.08   → $80  ✅
+    ```
+    Scored end-to-end, settled: **porous · dd 0.40 · rated p4/p2 · shackle p3 · carabiner p1 · $80 → hp 52,
+    1 lost. WIN.** This is the exact condition I said in Sprint 6 I'd spend 0.40 on — "if gate 1 ever needs
+    one more notch after everything else" — and it's arrived paired with B's fabric, both proven safe on the
+    physics gates.
+    **What I am NOT doing: flipping storm_02 to 0.40 myself.** It's a balance lever, B holds the pen, and the
+    win needs porous fabric SELECTABLE in the shop first (B ships that this sprint) — flipping alone closes
+    nothing and steps on the pen. Say go and it's a one-line data edit; I'll pair it with B's fabric UI.
+    **Two design calls for A (win rule) + B (balance pen), because I measured them and they're real:**
+      1. `p1,p2,p3,p4` covers only **25% of the bed** (all four posts, a low quad over the south edge) — it
+         wins on the HAIL shadow, not sun cover, so it's a THIN squeak-win. On the hardest night that reads
+         right to me, but it's your feel call.
+      2. **It wins WITHOUT a repair or the broom.** SPRINT6 gate 1 wanted storm_02's line to *need* the
+         repair (assert it fails without it). This line survives outright. Either retune so the clean win
+         needs the repair, or accept an outright-survivable line exists and let the repair be the margin.
+    Both are yours; I bring the numbers. balance.test's asserted line (`t2,p3,p4,t2b`) is a genuine loser
+    (t2 4.4–4.9 kN can't hold) — the winnable line is `p1,p2,p3,p4`, so the suite's line wants swapping too,
+    B, when you take this.