M0

.editorconfig

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+root = true
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4

.gitattributes

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+* text=auto eol=lf

.github/workflows/ci.yml

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+name: ci
+on: [push, pull_request]
+
+jobs:
+  build-test:
+    strategy:
+      matrix:
+        os: [ubuntu-22.04, macos-14]
+        toolchain: [stable]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
+        with: { toolchain: ${{ matrix.toolchain }} }
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo fmt --all -- --check
+      - run: cargo clippy --all-targets --all-features -D warnings
+      - run: cargo test --all --all-features
+      - run: cargo build -p game --release
+
+  determinism:
+    needs: build-test
+    strategy:
+      matrix: { os: [ubuntu-22.04, macos-14] }
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
+        with: { toolchain: stable }
+      - uses: Swatinem/rust-cache@v2
+      - name: Replay golden record
+        run: |
+          cargo run -p repro_harness -- --replay repro/golden/run_01.rec.json --assert_hash repro/golden/run_01.hash

.gitignore

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+target/
+**/*.rs.bk
+.DS_Store

.vscode/launch.json

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+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Run game (debug)",
+      "type": "lldb",
+      "request": "launch",
+      "cargo": { "args": ["run", "-p", "game"] },
+      "cwd": "${workspaceFolder}"
+    },
+    {
+      "name": "Run game (release)",
+      "type": "lldb",
+      "request": "launch",
+      "cargo": { "args": ["run", "-p", "game", "--release"] },
+      "cwd": "${workspaceFolder}"
+    }
+  ]
+}

.vscode/tasks.json

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+{
+  "version": "2.0.0",
+  "tasks": [
+    { "label": "cargo: build all", "type": "shell", "command": "cargo build --all -q", "problemMatcher": ["$rustc"] },
+    { "label": "cargo: run game", "type": "shell", "command": "cargo run -p game", "problemMatcher": ["$rustc"] }
+  ]
+}

CONTRIBUTING.md

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+## Etiquette
+- Feature branches; merge via PR with green CI.
+- No TODOs without a linked issue.
+- Changes to economy/saves/rulepacks must update tests and changelog.
+
+## Performance budgets
+- Gameplay ≤ 6 ms CPU; GPU ≤ 8/16/33 ms for 120/60/30 FPS tiers.
+
+## Determinism
+- Fixed timestep; DetRng only; stable system sets/order.