builds/README.md

# tinqs/builds

Build artifacts for the Tinqs stack — engine editor binaries (+ their GodotSharp C# bindings).
**Binaries and GodotSharp are stored via Git LFS** (see `.gitattributes`). Source lives in
`tinqs/engine`, `tinqs/ariki-game`, `tinqs/ariki-sim`. See `manifest.json` for exact versions.

> **Use `tinqs pull` / `tinqs push`, never raw git** — these are LFS-heavy.

## Installing / updating the engine

**Don't copy files by hand — run the `update-engine` skill (it lives in the game repo, which everyone has):**
[tinqs.com/tinqs/ariki-game · .agents/skills/update-engine](https://tinqs.com/tinqs/ariki-game/src/branch/main/.agents/skills/update-engine/SKILL.md).
Hand it to your agent; it `tinqs pull`s ariki-game + builds, installs the binary + GodotSharp into
`../engine/bin/`, wipes stale caches, and verifies. Covers macOS + Windows.

## ⚠️ The one rule: binary + GodotSharp are a MATCHED PAIR

Each engine binary ships with a `GodotSharp/` folder (Godot's C# bindings) **generated from that
exact engine build**. You must install them **together** and replace any old `GodotSharp`.

- The engine does **NOT** regenerate GodotSharp at runtime. If it's missing you get a
  **`.NET assemblies not found`** dialog pointing at `engine/bin/GodotSharp/Api/Debug`.
- A **stale** GodotSharp (from an older engine) against a newer binary throws
  **`Wrapper class not found for type: Terrain3D`** → terrain renders as water, animals don't animate.

This matters now because **Terrain3D and `agent_skinned` are native engine modules** (no separate
`addons/terrain_3d` GDExtension `.framework`). Built-in module classes need their wrappers baked
into GodotSharp, so GodotSharp had to be regenerated — and must ship here alongside the binary.

## Current contents

| Platform | Engine | Terrain3D | GodotSharp shipped? |
|---|---|---|---|
| `engine/macos-arm64/` | **4.7.2** (`d88e0a05`) — GPU-driven MultiMesh culling Stage A+B + real Metal GPU timestamps, on top of the shadow diet (tile budget, size cull, inverted contract), `get_video_adapter_memory()`, device-lost diagnostics | built-in module | ✅ yes (`GodotSharp/`) |
| `engine/windows-x64/`  | **4.7.2** (`b1bc0aef`) — upstream bugfixes + static shadow cache (no memory query yet) | built-in module | ✅ yes (`GodotSharp/`) |

Mac is engine `d88e0a05` as of 2026-10-05 (`--version` prints `4.7.2.stable.mono.custom_build.d88e0a051`): everything 51ed21d5 had (shadow diet incl. tile budget / live caster size cull / inverted-contract switch, video adapter memory query, GPU device-lost diagnostics) plus GPU-driven MultiMesh culling Stage A (compute frustum cull + indirect draws, `multimesh_set_gpu_cull`) and Stage B (per-instance GPU LOD bands, `multimesh_set_gpu_lods`), real Metal GPU timestamps (`renderGpuMs`), staggered far cascades, fit-to-visible-depth (SDSM-lite, default off), the Metal argument-buffer copy-queue stall fix and the Vulkan breadcrumb barrier fix (#185). Windows is `b1bc0aef` (2026-09-28, 4.7.2 + static shadow cache) and gets all of the above when Forge rebuilds from main - do not pin `required_engine_build` before that. Windows is `b1bc0aef` (2026-09-28, 4.7.2 + static shadow cache) and gets the memory query when Forge rebuilds from main. The engine source repo stays private. Check `manifest.json` for sha256. The 4.7 Windows cutover handoff is resolved: [`.agents/handoffs/forge-windows-4.7.md`](.agents/handoffs/forge-windows-4.7.md).

Long-term: CI (Gitea Actions) builds on push and publishes here / to S3 —
`docs/ai/plans/build-pipeline-architecture-2026-06-07.md`.