Metin2 game client (P0–P11) + mobile asset pipeline

Networked client on the existing Godot 4.7 + libgr2 renderer:
- net: m2dev wire protocol (libsodium KX + XChaCha20), auth/select/game
  phases, EntityStore world model, ~all GC/CG headers. char create/delete,
  private shop / mall / cube, SHOP_GC_START_EX, guild, party (+ CG_PARTY_SET_STATE),
  quests, dragon soul, refine, safebox, exchange.
- UI: in-game windows migrated 1:1 from the reference uiscript/root .py —
  char status (/stat), inventory+equipment, select-item ([SELECT_ITEM] quest
  token), system-option + game-option + ESC system menu, private-shop 39-grid,
  party info board, shop tabs, atlas, minimap, quickbar, chat, …
- EterGrnLib polish: GR2 material blend/two-sided, LOD crossfade, motion-event
  dispatch, contact shadow, ray-AABB picking, weapon grip pre-transform.

Portable asset IO (A1) — all extension/libgr2/formats/mtproto reads routed
through godot::FileAccess (res:// PCK works on iOS/Android); standalone-lib
*_path() kept for the non-Godot CTests. AssetResolver + PropertyRegistry
switched to a baked index (bake_asset_index.gd) instead of std::filesystem.

Mobile builds: build-{android,ios}.sh, export-android.sh, pack-assets.sh,
gen-debug-keystore.sh. Assets ship as a zip mounted at runtime by
project/asset_pack.gd (adb push now; HTTP download is a drop-in later).

ctest 10/10, 34 GDScript suites, macOS/iOS/Android all build.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013EJxkHiNKS4kybHS3XKyAJ

test/godot-macos-stress.json

@@ -1,63 +1,30 @@
 {
-  "note": "macOS, background/unfocused window -> Godot throttles to ~30fps; frame_ms rows at ~33.3 are the throttle ceiling, not measured cost. build_ms_per_char and the 100-char breakout (52ms) are the reliable signals. Proper frame timing = Phase 2 (focused window / on-device).",
-  "renderer": "Apple M2 (Apple8)",
-  "method": "per-frame set_bone_global_pose (B)",
+  "measured": "2026-08-29 (foreground window, M2, Metal, vsync off)",
+  "method": "per-frame CPU LBS + full ArrayMesh rebuild (current default)",
+  "caveats": [
+    "frame_ms is the trustworthy signal; cpu_process_ms (Performance.TIME_PROCESS) reads inconsistent (drops as N rises) \u2014 do not use.",
+    "per-frame cpu_mesh->clear_surfaces()+add_surface_from_arrays is the likely bottleneck, not the LBS math.",
+    "build ~170ms/char is single-threaded, no cross-model texture/mesh cache.",
+    "Phase 2 needs: (1) custom GPU skinning shader (full bone matrices) so this path is not on the CPU, (2) multithreaded build + eterpack shared assets, (3) a proper bench harness."
+  ],
   "runs": [
     {
-      "build_ms_per_char": 170.682,
-      "build_ms_total": 170.682,
       "characters": 1,
-      "cpu_process_ms_avg": 34.1602583333333,
-      "cpu_process_ms_p95": 34.405,
-      "fps_avg": 29.345480700072,
-      "frame_ms_avg": 34.0767973856208,
-      "frame_ms_max": 58.8235294117647,
-      "frame_ms_p95": 33.3333333333333,
-      "frames": 240,
-      "method": "per-frame set_bone_global_pose (B)",
-      "renderer": "Apple M2 (Apple8)"
+      "build_ms_per_char": 171.7,
+      "frame_ms_avg": 21.8,
+      "fps_avg": 46.0
     },
     {
-      "build_ms_per_char": 167.27,
-      "build_ms_total": 1672.7,
       "characters": 10,
-      "cpu_process_ms_avg": 35.1748875,
-      "cpu_process_ms_p95": 41.667,
-      "fps_avg": 30.0000000000001,
-      "frame_ms_avg": 33.3333333333332,
-      "frame_ms_max": 33.3333333333333,
-      "frame_ms_p95": 33.3333333333333,
-      "frames": 240,
-      "method": "per-frame set_bone_global_pose (B)",
-      "renderer": "Apple M2 (Apple8)"
+      "build_ms_per_char": 171.1,
+      "frame_ms_avg": 27.5,
+      "fps_avg": 36.3
     },
     {
-      "build_ms_per_char": 164.90146,
-      "build_ms_total": 8245.073,
-      "characters": 50,
-      "cpu_process_ms_avg": 34.5210166666665,
-      "cpu_process_ms_p95": 34.624,
-      "fps_avg": 30.1173930643639,
-      "frame_ms_avg": 33.203405017921,
-      "frame_ms_max": 33.3333333333333,
-      "frame_ms_p95": 33.3333333333333,
-      "frames": 240,
-      "method": "per-frame set_bone_global_pose (B)",
-      "renderer": "Apple M2 (Apple8)"
-    },
-    {
-      "build_ms_per_char": 164.65813,
-      "build_ms_total": 16465.813,
-      "characters": 100,
-      "cpu_process_ms_avg": 54.0874916666667,
-      "cpu_process_ms_p95": 62.877,
-      "fps_avg": 19.1516169676607,
-      "frame_ms_avg": 52.2149122807017,
-      "frame_ms_max": 52.6315789473684,
-      "frame_ms_p95": 52.6315789473684,
-      "frames": 240,
-      "method": "per-frame set_bone_global_pose (B)",
-      "renderer": "Apple M2 (Apple8)"
+      "characters": 30,
+      "build_ms_per_char": 168.7,
+      "frame_ms_avg": 41.2,
+      "fps_avg": 24.3
     }
   ]
 }