diff --git a/Aetheria/Brainstorming/Ship Design Language.md b/Aetheria/Brainstorming/Ship Design Language.md
index 1111628..43bc3ae 100644
--- a/Aetheria/Brainstorming/Ship Design Language.md	
+++ b/Aetheria/Brainstorming/Ship Design Language.md	
@@ -41,6 +41,17 @@ Concept art of a small working spacecraft from the Aetheria universe, made by a
 - *Frame.* This is the standard frame clause, verbatim.
 - *What it leaves out.* Thrusters, attitude ports and radiators are the operator's to place. Palette and silhouette belong to the faction. "Futuristic", "sleek" and "gritty" are left out because they draw nothing (guideline 7).
 
+## Rules From the Prompt Lab, Rounds 5 to 8
+
+> **Status: agent-promoted, pending operator review, 2026-10-08.** These rules come from the prompt lab in [[Brainstorming/Ship Prompt Bench 4|Ship Prompt Bench 4]], rounds 5 to 8 (24 FLUX 3 renders). A rule is promoted here only if it held on at least three ships across at least two factions with no unexplained failure. Weaker findings stay as candidates in Bench 4's "Lab notes after round 8", which also holds G3, the global block that applies these rules. Where a rule conflicts with the global block above, the block above is the older text, and the conflict is named under each rule.
+
+The evidence was gathered on the serious, spectacle, whimsy-turned-up and Pirate registers. The high-whimsy register, whose hulls may ignore vacuum engineering, was not tested, and these rules make no claim about it.
+
+1. **Vacuum hulls have no aero surfaces.** The global block says the ship "never flies through air, so it has no wings, fins, tailplanes, vanes, airfoils or streamlining of any kind." Evidence: 21 of 22 long-prompt renders, 10 ships, 7 factions (Ewan Hart, Lucent, Pirate, Zhestokost, AU, Finch, Adrasteia). The one failure is explained: a Pirate racer donor with no other identity grew a wing (Dine and Dash r5c), and identity carried by livery fixed it on the next four renders. A short prompt without the clause grew a fin (r7d). This replaces "every fin, blade and wing is a chunky rounded slab" in the block above.
+2. **Weapons appear only where the ship prompt names them,** and an unarmed ship says "unarmed" or "carries no weapons". Evidence: unarmed hulls stayed unarmed on 10 renders, 4 ships, 4 factions (Odd Job, Key Light, Oboz, Ghost Fare); single named weapons stayed single on a Finch and a Pirate hull, and a six-turret Zhestokost battery stayed at six. Named counts drifted upward twice on one ship until each turret was given a position, so a ship prompt places every gun it names. This replaces "guns in small turrets on thick armoured mounts" in the block above, which put turrets on unarmed hulls.
+3. **Faction blocks carry livery and register only; shape motifs go in the ship prompt.** A faction block states the register, finish, palette with where each colour lives, markings and wear. Shape language in a faction block (tractor proportions, fenders, a grappling arm, a gaming-mouse layout) leaks onto every hull of that faction. Evidence: 18 renders, 10 ships, 7 factions held their faction read on livery-only blocks. The one failure is explained and repaired: Lucent's spectacle register lives in its shapes, so Key Light went generic with the motifs cut (r7a) and recovered them when its ship prompt carried the gaming-mouse layout (r8a). The faction blocks below are the older, longer texts; Bench 4's lab notes list the per-faction cuts.
+4. **Wear belongs to the faction block, not the global block.** With no wear clause in the global block, wear stayed on every faction that names it: 16 renders, 7 ships, 4 factions (Pirate, AU, Zhestokost, Ewan Hart). This replaces the global block's "scuffed handholds and hatch edges, one replaced panel" sentence. The converse, that a clean faction then renders clean, is not promoted: it held on Finch, mostly held on Lucent with the clean statement first, and failed on Adrasteia.
+
 ---
 
 ## Registers