Remove Boost dependency, upgrade to C++20

.clangd

@@ -0,0 +1,2 @@
+CompileFlags:
+  CompilationDatabase: build/

.github/workflows/build.yml

@@ -10,44 +10,49 @@ jobs:
       matrix:
         include:
           - configuration: Debug
-            cc: gcc-12
-            cxx: g++-12
+            cc: gcc-14
+            cxx: g++-14
           - configuration: Release
-            cc: gcc-12
-            cxx: g++-12
+            cc: gcc-14
+            cxx: g++-14
           - configuration: Debug
-            cc: clang-15
-            cxx: clang++-15
+            cc: clang-18
+            cxx: clang++-18
           - configuration: Release
-            cc: clang-15
-            cxx: clang++-15
-    runs-on: ubuntu-22.04
+            cc: clang-18
+            cxx: clang++-18
+    runs-on: ubuntu-24.04
     env:
       CC: ${{ matrix.cc }}
       CXX: ${{ matrix.cxx }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
-          submodules: recursive
+      - name: init submodules (shallow)
+        run: git submodule update --init --recursive --depth 1
       - name: update apt package list
         run: sudo apt-get update -y
       - name: install apt packages
         run: sudo apt-get install -y
-          gcc-12
-          g++-12
-          clang-15
-          libboost-dev
-          libboost-filesystem-dev
-          libboost-program-options-dev
+          gcc-14
+          g++-14
+          clang-18
+          ccache
           libsdl2-dev
           libsdl2-image-dev
           libsdl2-mixer-dev
           libglew-dev
           zlib1g-dev
           libpng-dev
+      - name: restore ccache
+        uses: actions/cache@v5
+        with:
+          path: ~/.cache/ccache
+          key: ccache-${{ runner.os }}-${{ env.CC }}-${{ matrix.configuration }}-${{ github.sha }}
+          restore-keys: ccache-${{ runner.os }}-${{ env.CC }}-${{ matrix.configuration }}-
       - name: install node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v6
         with:
           node-version: 18
           cache: npm
@@ -66,7 +71,7 @@ jobs:
         run: npm run package
       - name: restore protobuf
         id: cache-protobuf-restore
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v5
         with:
           path: libs/_protobuf-install
           key: ${{ runner.os }}-${{ env.CC }}-protobuf
@@ -75,35 +80,32 @@ jobs:
         run: ./build-protobuf.sh
       - name: save protobuf
         id: cache-protobuf-save
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v5
         with:
           path: libs/_protobuf-install
           key: ${{ steps.cache-protobuf-restore.outputs.cache-primary-key }}
       - name: build rwe
         run: |
           mkdir build
           pushd build
-          cmake -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} ..
-          make -j 2
+          cmake -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache ..
+          make -j 4
           popd
       - name: test rwe
         run: ./build/rwe_test
   build-windows-msvc:
     strategy:
       matrix:
         configuration: [Debug, Release]
-    runs-on: windows-2022
+    runs-on: windows-2025-vs2026
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
-          submodules: recursive
-      - name: install python
-        uses: actions/setup-python@v4
-        with:
-          python-version: '3.10'
+      - name: init submodules (shallow)
+        run: git submodule update --init --recursive --depth 1
       - name: install node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v6
         with:
           node-version: 18
           cache: npm
@@ -121,27 +123,35 @@ jobs:
         working-directory: launcher
         run: npm run package
       - run: python3 fetch-msvc-libs.py
+      - name: install tools
+        run: choco install sccache nsis -y
+      - name: restore sccache
+        uses: actions/cache@v5
+        with:
+          path: ~\AppData\Local\Mozilla\sccache
+          key: sccache-${{ runner.os }}-msvc-${{ matrix.configuration }}-${{ github.sha }}
+          restore-keys: sccache-${{ runner.os }}-msvc-${{ matrix.configuration }}-
       - name: build rwe
         run: |
           mkdir build
           cd build
-          cmake -G "Visual Studio 17 2022" -A x64 -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} ..
-          cmake --build . --config ${{ matrix.configuration }} --parallel 2
+          cmake -G "Visual Studio 18 2026" -A x64 -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} -DCMAKE_C_COMPILER_LAUNCHER=sccache -DCMAKE_CXX_COMPILER_LAUNCHER=sccache ..
+          cmake --build . --config ${{ matrix.configuration }} --parallel 4
           cd ..
       - name: test rwe
         working-directory: build
         run: .\${{ matrix.configuration }}\rwe_test.exe
       - name: package rwe
         working-directory: build
-        run: cmake --build . --target package --config ${{ matrix.configuration }} --parallel 2
+        run: cmake --build . --target package --config ${{ matrix.configuration }} --parallel 4
       - name: upload zip artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v6
         with:
           name: RWE Zip ${{ runner.os }} MSVC ${{ matrix.configuration }}
           path: build/dist/RobotWarEngine-*-Windows-${{ matrix.configuration }}.zip
           if-no-files-found: error
       - name: upload installer artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v6
         with:
           name: RWE Installer ${{ runner.os }} MSVC ${{ matrix.configuration }}
           path: build/dist/RobotWarEngine-*-Windows-${{ matrix.configuration }}.exe
@@ -150,14 +160,15 @@ jobs:
     strategy:
       matrix:
         configuration: [Debug, Release]
-    runs-on: windows-2022
+    runs-on: windows-2025
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
-          submodules: recursive
+      - name: init submodules (shallow)
+        run: git submodule update --init --recursive --depth 1
       - name: install node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v6
         with:
           node-version: 18
           cache: npm
@@ -174,6 +185,8 @@ jobs:
       - name: package launcher
         working-directory: launcher
         run: npm run package
+      - name: install nsis
+        run: choco install nsis -y
       - uses: msys2/setup-msys2@v2
         with:
           msystem: MINGW64
@@ -185,18 +198,25 @@ jobs:
             make
             unzip
             mingw-w64-x86_64-toolchain
-            mingw-w64-x86_64-boost
             mingw-w64-x86_64-SDL2
             mingw-w64-x86_64-SDL2_image
             mingw-w64-x86_64-SDL2_mixer
             mingw-w64-x86_64-glew
             mingw-w64-x86_64-smpeg2
+            mingw-w64-x86_64-libmodplug
             mingw-w64-x86_64-zlib
             mingw-w64-x86_64-libpng
             mingw-w64-x86_64-readline
+            mingw-w64-x86_64-ccache
+      - name: restore ccache
+        uses: actions/cache@v5
+        with:
+          path: ~/.cache/ccache
+          key: ccache-${{ runner.os }}-mingw64-${{ matrix.configuration }}-${{ github.sha }}
+          restore-keys: ccache-${{ runner.os }}-mingw64-${{ matrix.configuration }}-
       - name: restore protobuf
         id: cache-protobuf-restore
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v5
         with:
           path: libs/_protobuf-install
           key: ${{ runner.os }}-mingw64-protobuf-${{ hashFiles('.git/modules/libs/protobuf/HEAD') }}
@@ -206,16 +226,16 @@ jobs:
         shell: msys2 {0}
       - name: save protobuf
         id: cache-protobuf-save
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v5
         with:
           path: libs/_protobuf-install
           key: ${{ steps.cache-protobuf-restore.outputs.cache-primary-key }}
       - name: build rwe
         run: |
           mkdir build
           pushd build
-          cmake -G 'Unix Makefiles' -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} ..
-          make -j 2
+          cmake -G 'Unix Makefiles' -DCMAKE_BUILD_TYPE=${{ matrix.configuration }} -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache ..
+          make -j 4
           popd
         shell: msys2 {0}
       - name: test rwe
@@ -227,13 +247,13 @@ jobs:
         run: make package
         shell: msys2 {0}
       - name: upload zip artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v6
         with:
           name: RWE Zip ${{ runner.os }} MinGW64 ${{ matrix.configuration }}
           path: build/dist/RobotWarEngine-*-Windows-${{ matrix.configuration }}.zip
           if-no-files-found: error
       - name: upload installer artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v6
         with:
           name: RWE Installer ${{ runner.os }} MinGW64 ${{ matrix.configuration }}
           path: build/dist/RobotWarEngine-*-Windows-${{ matrix.configuration }}.exe

.gitignore

@@ -1,5 +1,6 @@
 /libs/_msvc/
 /libs/_protobuf-install/
 
+/.cache/
 /.idea/
 /.vs/

.gitmodules

@@ -1,9 +1,6 @@
-[submodule "libs/spdlog"]
-	path = libs/spdlog
-	url = https://github.com/gabime/spdlog.git
 [submodule "libs/rapidcheck"]
 	path = libs/rapidcheck
-	url = https://github.com/MHeasell/rapidcheck.git
+	url = https://github.com/emil-e/rapidcheck.git
 [submodule "libs/protobuf"]
 	path = libs/protobuf
 	url = https://github.com/google/protobuf.git
@@ -19,3 +16,6 @@
 [submodule "libs/utfcpp"]
 	path = libs/utfcpp
 	url = https://github.com/nemtrif/utfcpp.git
+[submodule "libs/asio"]
+	path = libs/asio
+	url = https://github.com/chriskohlhoff/asio.git

CLAUDE.md

@@ -0,0 +1,79 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Robot War Engine (RWE) is an open-source real-time strategy game engine with high compatibility for Total Annihilation data files. It consists of a C++17 core engine and a TypeScript/Electron launcher application. Active priority is simplifying dependencies and improving new developer onboarding.
+
+## Build Commands
+
+### C++ Engine (from repo root)
+
+```bash
+# First time setup (submodules + protobuf)
+git submodule update --init --recursive
+cd libs && ./build-protobuf.sh && cd ..
+
+# Build (Linux/macOS)
+mkdir build && cd build
+cmake .. -G 'Unix Makefiles' -DCMAKE_BUILD_TYPE=Debug
+make -j$(nproc)
+
+# Run unit tests
+./build/rwe_test
+
+# Run a single test by name (Catch2 syntax)
+./build/rwe_test "test name pattern"
+./build/rwe_test "[tag]"
+```
+
+### Launcher (from `launcher/` directory)
+
+```bash
+npm ci
+npm run tsc          # Type check
+npm test             # Jest tests
+npm run lint         # ESLint
+npm run server       # Webpack dev server (hot reload)
+npm start            # Launch Electron app (needs RWE_HOME env var)
+npm run master-server # Local multiplayer master server
+npm run package      # Package for distribution
+```
+
+## Architecture
+
+### Core Engine (`src/rwe/`)
+
+The engine is built as a static library `librwe` linked by multiple executables (`rwe`, `rwe_bridge`, `rwe_test`, and various format test tools).
+
+Key subsystems:
+
+- **sim/** - Deterministic game simulation (units, weapons, projectiles, terrain, resources). Uses fixed-point math types (`SimScalar`, `SimVector`, `SimAngle`) for cross-platform determinism.
+- **scene/** - Scene state machine: MainMenuScene → LoadingScene → GameScene.
+- **render/** - OpenGL 3.0+ rendering pipeline with GLSL shaders (in `shaders/`).
+- **cob/** - Virtual machine executing Total Annihilation's COB unit behavior scripts. CobThread runs concurrent script coroutines within CobExecutionContext.
+- **io/** - Parsers for TA file formats: HPI (archives), GAF (sprites), TDF (config), 3DO (models), COB (scripts), FBI (units), TNT (terrain), PCX (images), OTA (maps), GUI (layouts).
+- **vfs/** - Virtual file system abstracting over HPI archives and directories.
+- **pathfinding/** - A* pathfinding with octile distance on grids.
+- **proto/** - Protocol buffer networking (defined in `proto/network.proto`).
+- **geometry/** / **math/** - Linear algebra and spatial primitives.
+- **collections/** - Custom data structures (MinHeap, VectorMap).
+
+### Launcher (`launcher/src/`)
+
+Electron app with React/Redux for the multiplayer lobby. Communicates with the engine via `rwe_bridge` (JSON IPC). Contains `launcher/`, `master-server/`, `game-server/`, and `common/` modules.
+
+## Code Conventions
+
+- All C++ code is in the `rwe::` namespace
+- Formatting enforced by `.clang-format`: Allman brace style, 4-space indent, no column limit, C++17 standard
+- Test files live alongside source: `src/rwe/[subsystem]/[Component].test.cpp`
+- Strong typing via opaque ID types: `UnitId`, `PlayerId`, `ProjectileId` (see `OpaqueId`)
+- Variant-based state machines for unit behavior and navigation goals
+- Error handling uses `Result<T, E>` types rather than exceptions
+- Version derived from git tags (format: `v#.#.#`)
+
+## CI
+
+GitHub Actions runs Linux (gcc-12, clang-15) and Windows (MSVC 2022, MinGW64) builds in both Debug and Release configurations.