engine(macos-arm64): publish 9dcc5d45 - screen-space contact shadows, hero shadow min-combine, upstream 4.8 shadow fixes #121775/#124348, draw_indirect_count (Metal); GodotSharp regenerated (API + Tools); Windows still 7fb81364b, Forge rebuild handoff forge-windows-sscs-9dcc5d45.md

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NCXU49xtHLSry4TQEzVN2m

.agents/handoffs/forge-windows-sscs-9dcc5d45.md

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+# Forge (Windows) — rebuild engine main at 9dcc5d45 (SSCS + hero combine + shadow fixes + indirect count)
+
+Mac `engine/macos-arm64` is engine `9dcc5d45` (2026-10-18, `4.7.2.stable.mono.custom_build.9dcc5d458`). Windows is
+still `7fb81364b`. **The game already pins `4.7.2@9dcc5d458`** (owner's call: publish Mac-only), so every Windows
+engine is refused with the mismatch dialog until this is published. `TINQS_ENGINE_SKIP_CHECK=1` runs the old engine
+meanwhile, but the sun then shows shadow acne (the game's sun bias 0.014 expects the #124348 bias fix).
+
+## Build
+`tinqs pull` the engine (main is `91b11b70` = `9dcc5d45` + docs only), build with the `windows-x64` manifest flags
+(`platform=windows target=editor module_mono_enabled=yes -j32`). The `--version` hash will read `91b11b70…` unless
+you `git checkout 9dcc5d45` first; either is fine (docs-only difference) — record what you built in the manifest.
+Regenerate GodotSharp from that binary: `--generate-mono-glue modules/mono/glue`, then `build_assemblies.py
+--godot-output-dir=bin --godot-platform=windows`. Publish the WHOLE `bin/GodotSharp` (`Api/` AND `Tools/`;
+`Tools/` is always written to `bin/GodotSharp/Tools`, a scratch output dir has no `Tools/` and the editor `--import`
+then fails with "Dependency resolution failed for GodotTools.dll").
+
+## New since 7fb81364 (none of it compiled on Windows yet)
+- `298bc2a6` `RenderingDevice.draw_list_draw_indirect_count`: D3D12 native path (`drivers/d3d12/rendering_device_driver_d3d12.cpp`).
+- `2ce4f359` screen-space contact shadows for directional lights (compute shader `screen_space_contact_shadows.glsl`,
+  binding 39 in the Forward+ scene shader, `DirectionalLightData::sscs_index` at byte 64).
+- `bb1f12e4` tight directional caster culling on each cascade's real frustum (upstream #121775).
+- `5df5c8df` hero shadow min-combine (`RenderingServer.instance_light_directional_set_hero_shadow_spot`).
+- `9dcc5d45` depth bias = `MAX(shadow_blur, 1)` scale (upstream #124348).
+
+## Checks
+1. Oracle: `bash tests/gpu_oracle/draw_indirect_count/run.sh <tinqs.windows.editor.x86_64.mono.exe> d3d12` from Git Bash.
+   Expect `ORACLE: 22 passed, 0 failed`, a `SKIP base-instance` line, exit 0 (engine wiki `draw-indirect-count.md`
+   § Windows checklist; Mac/Metal was 24/24). Also the Vulkan driver if the game runs Vulkan there: `… run.sh <exe> vulkan`.
+2. Game in-world on the new pair (pin satisfied):
+   - `env herocombine` status reports `mode combine (engine combine yes)`; the hero's spot shadow merges with the sun's.
+   - `env contactshadow on` → contact shadows under feet/grass; `--gpu-profile` shows `SSCS Main` / `Process SSCS`
+     (Mac M1 Max ≈ 0.43 ms at the beach); `env contactshadow length 0|2`, `blur 0` change it live; `off` restores.
+   - Sun shadows: no acne stripes, feet keep contact on bright sand (bias 0.014 x MAX(0.35, 1)).
+3. Publish windows-x64 here (binary + console binary + complete GodotSharp, sha256s, manifest note, CRLF), push.