CodexUI

CodexUI 1.0 is a native Qt 6 Widgets and browser frontend for the AISuite codex-bridge. Both applications present the same Codex app-server behavior without introducing another backend, semantic cache, snapshot store, or persistence authority.

The canonical process has two threads:

Qt GUI thread
    <-> bounded nonblocking Unix socketpair
SNode.C client thread
    <-> codex-bridge
    <-> Codex app-server

The Qt thread owns widgets and PresentationModel. The SNode.C thread owns the event loop, selected transport, AISuite::OpenAICodex frontend proxy SDK, native protocol normalization, and connection/controller telemetry. They exchange only bounded codexui.presentation JSONL commands and events.

Applications

codex-ui is the canonical visual application. Its production shell consumes the normalized presentation protocol and model directly; there is no parallel legacy UI or alternate application target.

CodexWebUI is the browser presentation. It uses the framework-neutral @snodec/codex-frontend SDK from AISuite, connects directly to the bridge over WebSocket, and follows the same controller, prompt, thread, turn, projection, and reconnect rules as the native application. Browser-only limitations are listed in the 1.0 contract.

Build

Qt 6 Widgets, Threads, libgit2 development files (discoverable as libgit2 through pkg-config), SNode.C master/HEAD, and an installed canonical AISuite package exporting AISuite::OpenAICodex are required. On Debian and Ubuntu, the libgit2 package is libgit2-dev.

cmake -S . -B "${BUILD_DIR}" -G Ninja \
  -DCMAKE_BUILD_TYPE=Debug \
  -DCMAKE_PREFIX_PATH="/path/to/aisuite;/path/to/snodec"
cmake --build "${BUILD_DIR}" --parallel 8
ctest --test-dir "${BUILD_DIR}" --output-on-failure --parallel 8
cmake --install "${BUILD_DIR}"

Installation includes the codex-ui executable, desktop entry, and SVG icon. The executable name, application ID, StartupWMClass, desktop entry, and icon name intentionally match so Linux launchers and taskbars associate the window with the installed CodexUI application.

Browser build

Node.js 20 or newer and the exact AISuite revision recorded in web/AISUITE_REVISION are required. The source dependency expects the release/CI checkout layout shown below.

workspace/
├── AISuite-extraction/AISuite-final/
└── CodexUI/codexui/

npm ci --prefix ../../AISuite-extraction/AISuite-final/packages/codex-frontend
npm test --prefix ../../AISuite-extraction/AISuite-final/packages/codex-frontend
npm ci --prefix web
npm run release --prefix web

The production artifact is web/app-dist/. CMake installs it below ${CMAKE_INSTALL_DATADIR}/codexui/web; codex-bridge serves those files and its /codex WebSocket endpoint from the same listener. Node is not part of the installed runtime. Deployment details are in web/README.md.

Architecture

The complete thread model, presentation protocol, authority rules, normalized event vocabulary, public APIs, shell behavior, implementation report, and test boundaries are documented in docs/codex-architecture.md.

Current message routing, pending-prompt acknowledgment, scrolling, composer geometry, shell-output, Inspector, and desktop-integration decisions are documented in docs/ui-behavior.md.

The browser architecture, native/web parity boundary, state ownership, and version 1.0 delivery gates are documented in docs/web-1.0-contract.md.

Measured performance, equality evidence, packaging, and the release gate are recorded in docs/web-qualification.md and docs/web-release.md.

License

CodexUI is available under the LGPL-3.0-or-later OR MIT dual license.