GitNexus/.devcontainer/devcontainer.json

// Devcontainer for GitNexus. Pre-installs Claude Code, OpenAI Codex CLI,
// and Cursor CLI alongside the Node.js native build chain. Cross-platform
// across macOS, Linux, and Windows-via-WSL2 (Windows-native is unsupported
// — see .devcontainer/README.md § Windows 11 setup). Opens via the VS Code
// Dev Containers extension.
//
// First-time setup, auth flows, and troubleshooting: .devcontainer/README.md.
{
  "name": "GitNexus AI CLI Devcontainer",

  "build": {
    "dockerfile": "Dockerfile",
    "context": ".",
    "args": {
      "CLAUDE_CODE_VERSION": "2.1.153",
      "CODEX_VERSION": "0.134.0",
      "CURSOR_VERSION": "latest",
      "TZ": "${localEnv:TZ:UTC}"
    }
  },

  // Runs on the HOST (not the container) before container create. The
  // single-string form is the spec-canonical shape for cross-platform
  // command-property dispatch; the object form is "named parallel tasks",
  // not OS dispatch. We use Node so the same command works in cmd.exe on
  // Windows and bash/zsh on Linux/macOS/WSL — the script reads `os.homedir()`
  // (which respects $HOME on POSIX and %USERPROFILE% on Windows) and creates
  // the host-side bind mount sources idempotently. Host prerequisite: Node
  // on PATH (the only host-side toolchain dependency beyond Docker Desktop
  // and the VS Code Dev Containers extension).
  "initializeCommand": "node .devcontainer/ensure-host-config-dirs.cjs",

  "features": {
    "ghcr.io/devcontainers/features/github-cli:1": {}
  },

  "remoteUser": "node",
  "updateRemoteUserUID": true,

  "workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind,consistency=delegated",
  "workspaceFolder": "/workspace",

  // Mount topology, by group:
  //
  // 1. CLI config dirs — bind-mounted from the host so the developer's
  //    existing plugins, skills, agents, memory, settings, and credentials
  //    for Claude Code / Codex / Cursor + git identity + gh auth are
  //    immediately available inside the container, and changes inside the
  //    container flow back to the host. ~/.gitconfig is read-only so
  //    container-side `git config --global` doesn't leak to host config.
  //    For high-trust environments where host and container should NOT
  //    share credentials, swap these three CLI bind mounts for
  //    per-devcontainer named volumes (Anthropic's reference pattern).
  //
  // 2. Per-instance state — `${devcontainerId}` scoped: history and npm
  //    cache survive container rebuilds but stay isolated between
  //    sibling devcontainer instances.
  //
  // 3. Per-workspace-name AND per-instance state — workspace `node_modules`
  //    volumes use both `${localWorkspaceFolderBasename}` (debuggable in
  //    `docker volume ls`) and `${devcontainerId}` (collision-free between
  //    sibling instances of the same repo, e.g., ~/work/GitNexus vs
  //    ~/projects/GitNexus). Keeps tree-sitter native binaries and
  //    onnxruntime off the workspace bind mount (the real Win/Mac perf win).
  "mounts": [
    "source=${localEnv:HOME}/.claude,target=/home/node/.claude,type=bind",
    "source=${localEnv:HOME}/.codex,target=/home/node/.codex,type=bind",
    "source=${localEnv:HOME}/.cursor,target=/home/node/.cursor,type=bind",
    "source=${localEnv:HOME}/.gitconfig,target=/home/node/.gitconfig,type=bind,readonly",
    "source=${localEnv:HOME}/.config/git,target=/home/node/.config/git,type=bind,readonly",
    "source=${localEnv:HOME}/.ssh,target=/home/node/.ssh,type=bind,readonly",
    "source=${localEnv:HOME}/.config/gh,target=/home/node/.config/gh,type=bind",
    "source=commandhistory-${devcontainerId},target=/commandhistory,type=volume",
    "source=npm-cache-${devcontainerId},target=/home/node/.npm,type=volume",
    "source=${localWorkspaceFolderBasename}-root-node-modules-${devcontainerId},target=/workspace/node_modules,type=volume",
    "source=${localWorkspaceFolderBasename}-gitnexus-node-modules-${devcontainerId},target=/workspace/gitnexus/node_modules,type=volume",
    "source=${localWorkspaceFolderBasename}-gitnexus-web-node-modules-${devcontainerId},target=/workspace/gitnexus-web/node_modules,type=volume",
    "source=${localWorkspaceFolderBasename}-gitnexus-shared-node-modules-${devcontainerId},target=/workspace/gitnexus-shared/node_modules,type=volume"
  ],

  // Interactive login is the default auth path for all three CLIs;
  // credentials persist in the host-bind-mounted directories (~/.claude,
  // ~/.codex, ~/.cursor) declared in the mounts block above.
  // API keys (ANTHROPIC_API_KEY / OPENAI_API_KEY / CURSOR_API_KEY) are NOT
  // injected via containerEnv — `${localEnv:VAR}` resolves an unset host var
  // to an empty string, and Cursor in particular treats `CURSOR_API_KEY=""`
  // as "use this empty key" rather than "fall back to stored login", which
  // would silently break `cursor-agent login`. Users who need API key auth
  // should `export` the var in their container shell or carry it via their
  // VS Code dotfiles repo (see .devcontainer/README.md).
  "containerEnv": {
    "CLAUDE_CONFIG_DIR": "/home/node/.claude",
    "DISABLE_AUTOUPDATER": "1",
    "HISTFILE": "/commandhistory/.zsh_history"
  },

  "customizations": {
    "vscode": {
      "extensions": [
        "anthropic.claude-code",
        "dbaeumer.vscode-eslint",
        "esbenp.prettier-vscode",
        "eamodio.gitlens"
      ],
      "settings": {
        "editor.formatOnSave": true,
        "editor.defaultFormatter": "esbenp.prettier-vscode",
        "editor.codeActionsOnSave": {
          "source.fixAll.eslint": "explicit"
        },
        "files.eol": "\n",
        "terminal.integrated.defaultProfile.linux": "zsh",
        "terminal.integrated.profiles.linux": {
          "bash": { "path": "bash", "icon": "terminal-bash" },
          "zsh": { "path": "zsh" }
        }
      }
    }
  },

  // 4747 (gitnexus serve) must not be remapped: gitnexus-web hardcodes
  // http://localhost:4747 as the default backend URL.
  "forwardPorts": [5173, 4747, 4173],
  "portsAttributes": {
    "5173": {
      "label": "Vite dev (gitnexus-web)",
      "onAutoForward": "notify"
    },
    "4747": {
      "label": "gitnexus serve HTTP API",
      "onAutoForward": "notify",
      "requireLocalPort": true
    },
    "4173": {
      "label": "Static web (Vite preview)",
      "onAutoForward": "silent"
    }
  },

  // Driver script with labeled steps lives at .devcontainer/post-create.sh
  // so each step's success/failure is visible in the log without parsing
  // an &&-chain. Run via `bash` explicitly so the script doesn't depend
  // on its executable bit surviving the workspace bind mount.
  "postCreateCommand": "bash .devcontainer/post-create.sh"
}