[Don't merge] Build test

.github/actions/run-clang-format/action.yaml

@@ -28,7 +28,6 @@ runs:
         echo ::group::Install Dependencies
         eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
         echo "/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin" >> $GITHUB_PATH
-        echo "/home/linuxbrew/.linuxbrew/opt/clang-format@17/bin" >> $GITHUB_PATH
         brew install --quiet zsh
         echo ::endgroup::
 
@@ -52,7 +51,15 @@ runs:
 
         if (( ${changes[(I)(*.c|*.h|*.cpp|*.hpp|*.m|*.mm)]} )) {
           echo ::group::Install clang-format-17
-          brew install --quiet obsproject/tools/clang-format@17
+          # PyPI `clang-format` (ssciwr/clang-format-wheel) ships the upstream
+          # LLVM 17.0.3 binary, so pinning the version here pins the tool exactly.
+          python3 -m pip install --quiet --user --break-system-packages 'clang-format==17.0.3'
+          export PATH="$(python3 -m site --user-base)/bin:${PATH}"
+          echo "Resolved clang-format: $(command -v clang-format)"
+          clang-format --version
+          clang-format --version | grep -qE 'version 17\.0\.3([[:space:]]|$)' || {
+            echo "::error::clang-format is not pinned to 17.0.3"; exit 1;
+          }
           echo ::endgroup::
 
           echo ::group::Run clang-format-17

.github/actions/run-cmake-format/action.yaml

@@ -51,7 +51,13 @@ runs:
 
         if (( ${changes[(I)*.cmake|*CMakeLists.txt]} )) {
           echo ::group::Install cmakelang
-          pip3 install cmakelang
+          python3 -m pip install --quiet --user --break-system-packages 'cmakelang==0.6.13'
+          export PATH="$(python3 -m site --user-base)/bin:${PATH}"
+          echo "Resolved cmake-format: $(command -v cmake-format)"
+          cmake-format --version
+          cmake-format --version | grep -qE '^0\.6\.13$' || {
+            echo "::error::cmake-format is not pinned to 0.6.13"; exit 1;
+          }
           echo ::endgroup::
           echo ::group::Run cmake-format
           ./build-aux/run-cmake-format --fail-${{ inputs.failCondition }} --check

.github/scripts/utils.zsh/setup_linux

@@ -57,7 +57,6 @@ if (( ! (${skips[(Ie)all]} + ${skips[(Ie)deps]}) )) {
       qt6-base-dev${suffix}
       libqt6svg6-dev${suffix}
       qt6-base-private-dev${suffix}
-      libqt6websockets6-dev${suffix}
     )
   }
 

.gitignore

@@ -37,7 +37,6 @@
 # Except additional project files
 !src-link_usage_image.jpg
 !/srtrelay
-!Frameworks.cmake.in
 !README_ja.md
 !/mediamtx
 !/AGENTS.md

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "lib/o2"]
-	path = lib/o2
-	url = https://github.com/OPENSPHERE-Inc/o2.git
 [submodule "lib/json"]
 	path = lib/json
 	url = https://github.com/nlohmann/json.git

CLAUDE.md

@@ -9,10 +9,10 @@ control, and connection management with team operations.
 It is developed and maintained by **OPENSPHERE Inc.** under the GPLv2+ license.
 
 - Repository language: **C++ 17** with **Qt 6** for UI
-- Build system: **CMake** (≥ 3.16, ≤ 3.26)
+- Build system: **CMake** (≥ 3.22, ≤ 3.26)
 - Based on the official [obs-plugintemplate](https://github.com/obsproject/obs-plugintemplate)
 - Target OBS Studio version: **≥ 30.1.0** (Qt6, x64 / ARM64 / Apple Silicon)
-- Current version: **0.7.6**
+- Current version: **0.8.0**
 
 ---
 
@@ -24,7 +24,6 @@ src-link/
 ├── CMakePresets.json            # CMake presets (windows-x64, macos, linux-x86_64, linux-aarch64, CI variants)
 ├── buildspec.json               # Build specification (name, version, dependencies, UUIDs)
 ├── build.ps1                    # Local Windows build script (RelWithDebInfo)
-├── Frameworks.cmake.in          # macOS framework configuration
 ├── .clang-format                # C++ code style (clang-format ≥ 16)
 ├── .cmake-format.json           # CMake code style
 ├── .github/
@@ -41,7 +40,15 @@ src-link/
 │   ├── plugin-main.cpp          # Plugin entry point (module load/unload)
 │   ├── api-client.hpp / .cpp    # SRCLinkApiClient: central orchestrator, OAuth, REST API, WebSocket
 │   ├── api-websocket.hpp / .cpp # SRCLinkWebSocketClient: control API WebSocket client
-│   ├── request-invoker.hpp / .cpp # HTTP request sequencing (OAuth2 via o2 library)
+│   ├── net/
+│   │   ├── http-request-invoker.hpp / .cpp   # OAuth2-aware HTTP request invoker
+│   │   ├── http-response.hpp                 # HTTP response struct
+│   │   ├── http-error.hpp / .cpp             # HTTP error mapping helpers
+│   │   ├── curl-http-client.hpp / .cpp       # libcurl-based HTTP client
+│   │   ├── ws-client.hpp / .cpp              # libcurl-based WebSocket client
+│   │   ├── oauth2-client.hpp / .cpp          # OAuth2 authorization-code flow client
+│   │   ├── local-http-server.hpp / .cpp      # OAuth2 redirect-uri loopback server
+│   │   └── linux-ca-locations.hpp / .cpp     # Linux CA bundle path discovery
 │   ├── settings.hpp / .cpp      # SRCLinkSettingsStore: persistent settings (OBS profile INI)
 │   ├── schema.hpp               # JSON data schemas (Account, Party, Stage, Uplink, Downlink, etc.)
 │   ├── utils.hpp / .cpp         # Utility functions, encoder helpers, network helpers
@@ -68,7 +75,6 @@ src-link/
 │       └── event-handler.hpp / .cpp       # OBS event broadcasting to WebSocket clients
 ├── lib/
 │   ├── json/                    # nlohmann/json (bundled)
-│   ├── o2/                      # OAuth2 client library (bundled)
 │   └── obs-websocket/           # OBS WebSocket library (bundled)
 ├── shared/
 │   ├── properties-view/         # Custom OBS properties UI helpers
@@ -86,11 +92,11 @@ src-link/
 
 | Platform | Toolchain |
 |----------|-----------|
-| Windows  | Visual Studio 17 2022, CMake ≥ 3.16, Qt 6 |
-| macOS    | Xcode ≤ 16.4.0 (macOS SDK ≤ 15.5), CMake ≥ 3.16, Qt 6 |
-| Linux    | GCC / Clang, CMake ≥ 3.16, Qt 6 |
+| Windows  | Visual Studio 17 2022, CMake ≥ 3.22 (≤ 3.26), Qt 6 |
+| macOS    | Xcode ≤ 16.4.0 (CI pins Xcode 15.2 on macos-14), macOS SDK ≤ 15.5, CMake ≥ 3.22 (≤ 3.26), Qt 6 |
+| Linux    | GCC / Clang, CMake ≥ 3.22 (≤ 3.26), Qt 6 |
 
-> **Note (macOS):** This project requires **Xcode 16.4.0 (macOS 15.5 SDK) or below**. Xcode 26 / macOS SDK 26 and later are currently unsupported due to compatibility constraints with OBS Studio's build dependencies.
+> **Note (macOS):** This project requires **Xcode 16.4.0 (macOS 15.5 SDK) or below**. Xcode 26 / macOS SDK 26 and later are currently unsupported due to compatibility constraints with OBS Studio's build dependencies. CI runs on `macos-14` with Xcode 15.2 explicitly selected; local development should target an Xcode within this supported range to keep parity with CI.
 
 OBS Studio sources and pre-built dependencies are fetched automatically via `buildspec.json`
 (obs-studio 30.1.2, obs-deps, Qt6).
@@ -215,7 +221,7 @@ The plugin registers via `obs_module_load()` in `plugin-main.cpp`. It creates:
 | **Event Handler** | `WsPortalEventHandler` | Singleton OBS event broadcaster for WebSocket Portal clients. |
 | **Audio Capture** | `SourceAudioCapture` | Abstract audio buffer with format conversion. Extended by `OutputAudioSource` for OBS audio output binding. |
 | **Image Renderer** | `ImageRenderer` | Renders placeholder images (filler, connecting, error states) for sources. |
-| **Request Invoker** | `RequestInvoker` / `RequestSequencer` | HTTP request pipelining with OAuth2 token management via o2 library. Sequential queuing and parallel invocation support. |
+| **Request Invoker** | `RequestInvoker` / `RequestSequencer` | HTTP request pipelining with OAuth2 token management via the in-tree `src/net/` stack. Sequential queuing and parallel invocation support. |
 | **Settings Store** | `SRCLinkSettingsStore` | Persistent key-value settings stored in OBS profile INI. |
 | **JSON Schemas** | `schema.hpp` | Typed data classes: `AccountInfo`, `PartyArray`, `StageArray`, `UplinkInfo`, `DownlinkInfo`, `WsPortalArray`, `SubscriptionFeatures`, etc. |
 
@@ -235,7 +241,7 @@ The plugin registers via `obs_module_load()` in `plugin-main.cpp`. It creates:
 - **UI Thread**: Qt event loop — main window, dialogs, docks, API client.
 - **OBS Callbacks**: Video render, audio filter, video tick — may run on different threads from the UI thread.
 - **Audio Thread**: `SourceAudioThread` — dedicated thread for source audio processing in `IngressLinkSource`.
-- **Network**: Qt networking runs on the default Qt event loop.
+- **Network**: HTTP / WebSocket I/O is driven by the in-tree `src/net/` stack (libcurl + custom OAuth2 / WebSocket clients) on the Qt event loop. Qt Network is no longer used.
 
 **Synchronization**:
 - `QMutex` protects audio buffers in `SourceAudioCapture`.
@@ -246,7 +252,7 @@ The plugin registers via `obs_module_load()` in `plugin-main.cpp`. It creates:
 ### Network & API Architecture
 
 **Authentication**:
-- OAuth2 flow via the o2 library (browser-based approval).
+- OAuth2 flow implemented in `src/net/oauth2-client.cpp` (browser-based approval; loopback HTTP server for the redirect).
 - Tokens stored in OBS profile settings via `SRCLinkSettingsStore`.
 - Automatic token refresh on expiry.
 - UUID-based client identification.
@@ -432,7 +438,8 @@ Release tags follow semver: `X.Y.Z` for stable, `X.Y.Z-beta`/`X.Y.Z-rc` for pre-
 - **Memory management** — Use OBS RAII wrappers. Raw `bfree()` / `obs_data_release()` calls are error-prone.
 - **`.gitignore` uses allowlist pattern** — New top-level files/directories must be explicitly un-ignored with `!` prefix.
 - **Port management** — Ingress ports must be within the configured range and not conflict with other instances. The API client manages port allocation.
-- **Bundled libraries** (`lib/`) — `nlohmann/json`, `o2`, and `obs-websocket` are vendored. Update with caution.
+- **Bundled libraries** (`lib/`) — `nlohmann/json` and `obs-websocket` are vendored. Update with caution.
+- **Network stack dependencies (FetchContent)** — `libcurl` (static, WebSocket-enabled) is fetched at configure time by `CMakeLists.txt`. On Linux, `mbedtls` is fetched and linked statically as the TLS backend; Windows uses Schannel and macOS uses Secure Transport. Because curl/mbedtls are now built in-tree, `buildspec.json` pins `obs-deps` / `qt6` to upstream `obsproject/obs-deps@2024-03-19` (ships Qt 6.6.2, sufficient for `Qt::SingleShotConnection`) — the OPENSPHERE-Inc fork that previously supplied a WebSocket-enabled curl is no longer required.
 - **Encoder presets** (`data/presets/`) — Hardware encoder presets are platform-specific. Test on target hardware when modifying.
 
 ---