From d8013252c332ae74dcd822ec1722a4d9b78f78ae Mon Sep 17 00:00:00 2001
From: jyelon <jyelon@gmail.com>
Date: Mon, 14 Sep 2026 14:43:00 -0400
Subject: [PATCH] ajkhdkjash

---
 claude/integration-memory/MEMORY.md           |  1 +
 .../project_island_terrain_design.md          | 45 +++++++++++++++++++
 claude/settings.json                          |  4 +-
 ssh/config                                    |  5 +++
 ssh/gen-work-key.sh                           |  2 +
 5 files changed, 55 insertions(+), 2 deletions(-)
 create mode 100644 claude/integration-memory/project_island_terrain_design.md
 create mode 100755 ssh/gen-work-key.sh

diff --git a/claude/integration-memory/MEMORY.md b/claude/integration-memory/MEMORY.md
index f121f53..0ef8158 100644
--- a/claude/integration-memory/MEMORY.md
+++ b/claude/integration-memory/MEMORY.md
@@ -58,6 +58,7 @@
 ## Project
 
 - [Eris addinfo intentionally removed](project_eris_addinfo_removed.md) — `luaG_runerror` no longer prefixes `file:line:`; traceback machinery handles location info
+- [Island terrain design](project_island_terrain_design.md) — downloadable-island terrain replacing Landscape: 257² patches, shared flat mesh + WPO, FHeightField collision
 
 ## Feedback
 
diff --git a/claude/integration-memory/project_island_terrain_design.md b/claude/integration-memory/project_island_terrain_design.md
new file mode 100644
index 0000000..eab693f
--- /dev/null
+++ b/claude/integration-memory/project_island_terrain_design.md
@@ -0,0 +1,45 @@
+---
+name: project-island-terrain-design
+description: Design decisions for the downloadable-island terrain system (replaces Unreal Landscape)
+metadata: 
+  node_type: memory
+  type: project
+  originSessionId: 38ffbfc6-93fe-4670-9015-1be594a56944
+---
+
+Game concept: like visiting Animal Crossing islands — client downloads an island
+(heightfield + weightmaps) from a server and builds terrain at runtime in a
+packaged build. Stock Landscape is unusable (editor-only construction). Terrain
+is smooth sculpted hills (heightfield, NOT voxels, NOT tile-based). Islands can
+be large (multi-km); ~5s load budget is fine.
+
+Decisions as of 2026-06-11:
+
+- **Patches**: 256×256 quads = 257×257 vertices, driven by a 257×257 non-mipped
+  height texture region (possibly a sub-rect of one big island texture — left open).
+- **LOD**: 3 levels (interiors 256/128/64 segments), but patch *edges always stay
+  at full 257-vertex resolution* — only interiors decimate. Any two neighbor LODs
+  fit seamlessly by construction; no stitching, no neighbor bookkeeping. Transition
+  ring fans coarse interior to full-res edge (the tricky indexing part).
+- **One shared mesh**: a single flat (z=0) UStaticMesh with 3 LODs, built at
+  runtime via FMeshDescription + BuildFromMeshDescriptions(bFastBuild=true),
+  cached lazily in a GameInstanceSubsystem. Rendered via HISM instances (one per
+  patch); HISM auto per-instance LOD selection is safe thanks to edge-preserving LODs.
+- **Displacement**: material WPO samples height texture (explicit mip 0, point
+  filter, +half-texel offset). UVs NOT stored in mesh — derived from world position
+  minus island origin (material params). No per-instance custom data needed.
+  Pixel shader: splat weightmaps + heightfield-derived normal map (those DO get mips;
+  weightmaps sized 4096², not 4097, so BC compression works).
+- **Collision**: custom UPrimitiveComponent wrapping Chaos::FHeightField (no cook,
+  ~ms build, built from the same uint16 samples; crib from LandscapeCollision.cpp:1049).
+  Nobody public has done this (verified via Sourcegraph 2026-06); trimesh PMC path is
+  scaffolding only. Heightfield wins on memory (34MB vs GBs at 4097²) and query speed.
+- **Height data**: uint16 grid, Landscape convention ((worldZ/scale)+32768).
+- **Lumen**: project doesn't use it (no RendererSettings overrides; default GI=None).
+  Flat-proxy WPO terrain is incompatible-ish with Lumen — accepted, documented risk.
+- Heightfield texture is NOT mipmapped (LODs sample full-res at sparse points —
+  exact vs collision; Landscape instead resamples mips + geomorphs, [[its choice]]).
+
+Code so far: `Source/Integration/TerrainPatch.h/cpp` — USTRUCT FlxTerrainPatch with
+stubbed static MakePatch() (returns UStaticMesh*) and editor-only SavePatch()
+(writes uasset for debugging; game always generates dynamically).
diff --git a/claude/settings.json b/claude/settings.json
index c6045dc..8d6b75b 100755
--- a/claude/settings.json
+++ b/claude/settings.json
@@ -62,7 +62,7 @@
     ],
     "defaultMode": "acceptEdits"
   },
-  "model": "sonnet",
   "effortLevel": "medium",
-  "theme": "light"
+  "theme": "light",
+  "tui": "fullscreen"
 }
diff --git a/ssh/config b/ssh/config
index ed136d7..0cd7d87 100644
--- a/ssh/config
+++ b/ssh/config
@@ -2,3 +2,8 @@ Host gitlab.com
     IdentityFile ~/.ssh/id_gitlab
     IdentitiesOnly yes
     AddKeysToAgent 8h
+Host work
+    IdentityFile ~/.ssh/id_work
+    IdentitiesOnly yes
+    AddKeysToAgent 8h
+
diff --git a/ssh/gen-work-key.sh b/ssh/gen-work-key.sh
new file mode 100755
index 0000000..37c56fc
--- /dev/null
+++ b/ssh/gen-work-key.sh
@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+ssh-keygen -t ed25519 -a 100 -f ~/.ssh/id_work -C "jyelon@gmail.com"