wip(L15, side branch): extended far gate + rejected far-mesh candidates (null result)

Refine x2 at LOD4-8 saves 13.6% but breaks the 1 px rule, shading and swaps, and opens holes;
station x2 and ray removal open connector gaps. Not for assembler/world. See Linux15/REPORT.md.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CSFYgsdW8ejZSyiMf4qRSX

ARCHITECTURE.md

@@ -570,6 +570,15 @@ ApplyModification` (BlueprintCallable) + `EditorCarveSphere/EditorFillSphere` (C
 driven by `EditorBrush*` props.
 
 ### 8.10 Performance invariants (DON'T regress)
+
+- **Far display mesh budget (L15)** (`WorldAssemblyEvaluatorVersion` 7): recipes may explicitly
+  declare `far_display_mesh` for LOD3+ display generation. With no declaration, the L14 mesh path
+  remains byte-for-byte selected. This setting must never alter LOD0–2, exact field queries,
+  collision, edits, or server state. A declared reduction must pass the same-LOD screen gate at the
+  closest displayed distance: at most 1.0 px geometry displacement, at most 1/255 normalized
+  shading/material delta, no worse swap pop, and no new holes, cracks, or floating pieces. Connector
+  wall repairs are safety geometry: retain every station/ray needed to close the existing gaps. Keep
+  the setting in the shared Core path so all recipe routes use the same declaration and evaluator.
 - **Streaming** (`UpdateChunksAroundPosition`): rebuild/cull the desired set only when the player
   crosses a level-0 chunk boundary, an anchor moves, or a rebuild is forced; use the stamped
   desired map for the cull and idle via `bAllChunksLoaded`. On every rebuild, pending requests whose
@@ -1840,6 +1849,17 @@ fill and check page tiles against the evaluator they actually sample. This is th
 the Unreal adapter and its asynchronous MPSC/Epoch flow are unchanged. See
 [`Standalone/Research/WorldAssemblerM3/Linux13/REPORT.md`](Standalone/Research/WorldAssemblerM3/Linux13/REPORT.md).
 
+### 8.37 Screen-gated far display budget — World Assembler M3 L15
+
+Evaluator version 7 adds the optional, serialized `far_display_mesh` recipe declaration for
+display-only LOD3+ refinement and connector repair. A missing declaration selects the existing L14
+path; exact queries, LOD0–2, collision, edits, and route binding stay on their existing shared Core
+evaluators. The acceptance gate compares against today's same-LOD display mesh, reports geometry and
+fixed-light/material shading deltas, checks every displayed tile, and measures each adjacent LOD
+swap before and after. It rejects any new hole, crack, or floating piece, including lost connector
+panels. No tested L15 candidate met the full budget, so no declaration is enabled by default. See
+[`Standalone/Research/WorldAssemblerM3/Linux15/REPORT.md`](Standalone/Research/WorldAssemblerM3/Linux15/REPORT.md).
+
 ## 9. Multiplayer model (listen-server first, dedicated-friendly)
 
 > **Status: transport is DESIGN ONLY — nothing is networked in-tree yet** (no `Replicated`/`HasAuthority`/RPCs; a