diff --git a/Triple-C.md b/Triple-C.md
index 16bd480..26126d8 100644
--- a/Triple-C.md
+++ b/Triple-C.md
@@ -1,3 +1,104 @@
 # Triple-C (Claude-Code-Container)
 
-Triple C is a container intended to limit what files Claude Code has access to, so when you run with `--dangerously-skip-permissions` Claude only has access to files/projects you provide to it.
\ No newline at end of file
+Triple-C is a cross-platform desktop application that sandboxes Claude Code inside Docker containers. When running with `--dangerously-skip-permissions`, Claude only has access to the files and projects you explicitly provide to it.
+
+## Architecture
+
+- **Frontend**: React 19 + TypeScript + Tailwind CSS v4 + Zustand state management
+- **Backend**: Rust (Tauri v2 framework)
+- **Terminal**: xterm.js with WebGL rendering
+- **Docker API**: bollard (pure Rust Docker client)
+
+### Layout Structure
+
+```
+┌─────────────────────────────────────────────────────┐
+│  TopBar (terminal tabs + Docker/Image status)       │
+├────────────┬────────────────────────────────────────┤
+│  Sidebar   │  Main Content (terminal views)         │
+│  (25% w,   │                                        │
+│  responsive│                                        │
+│  min/max)  │                                        │
+├────────────┴────────────────────────────────────────┤
+│  StatusBar (project/terminal counts)                │
+└─────────────────────────────────────────────────────┘
+```
+
+### Container Lifecycle
+
+1. **Create**: New container created with bind mounts, env vars, and labels
+2. **Start**: Container started, entrypoint remaps UID/GID, sets up SSH, configures Docker group
+3. **Terminal**: `docker exec` launches Claude Code with a PTY
+4. **Stop**: Container halted (filesystem persists in named volume)
+5. **Restart**: Existing container restarted; recreated if settings changed (e.g., Docker access toggled)
+6. **Reset**: Container removed and recreated from scratch (named volume preserved)
+
+### Mounts
+
+| Target in Container | Source | Type | Notes |
+|---|---|---|---|
+| `/workspace` | Project directory | Bind | Read-write |
+| `/home/claude/.claude` | `triple-c-claude-config-{projectId}` | Named Volume | Persists across container recreation |
+| `/tmp/.host-ssh` | SSH key directory | Bind | Read-only; entrypoint copies to `~/.ssh` |
+| `/home/claude/.aws` | AWS config directory | Bind | Read-only; for Bedrock auth |
+| `/var/run/docker.sock` | Host Docker socket | Bind | Only if "Allow container spawning" is ON |
+
+### Authentication Modes
+
+Each project can independently use one of:
+
+- **`/login`** (OAuth): User runs `claude login` inside the terminal. Token persisted in the config volume.
+- **API Key**: Stored in the OS keychain, injected as `ANTHROPIC_API_KEY` env var.
+- **AWS Bedrock**: Per-project AWS credentials (static keys, profile, or bearer token).
+
+### Container Spawning (Sibling Containers)
+
+When "Allow container spawning" is enabled per-project, the host Docker socket is bind-mounted into the container. This allows Claude Code to create **sibling containers** (not nested Docker-in-Docker) that are visible to the host. The entrypoint detects the socket's GID and adds the `claude` user to the matching group.
+
+If the Docker access setting is toggled after a container already exists, the container is automatically recreated on next start to apply the mount change. The named config volume (keyed by project ID) is preserved across recreation.
+
+### Docker Socket Path
+
+The socket path is OS-aware:
+- **Linux/macOS**: `/var/run/docker.sock`
+- **Windows**: `//./pipe/docker_engine`
+
+Users can override this in Settings via the global `docker_socket_path` option.
+
+## Key Files
+
+| File | Purpose |
+|---|---|
+| `app/src/App.tsx` | Root layout (TopBar + Sidebar + Main + StatusBar) |
+| `app/src/index.css` | Global CSS variables, dark theme, `color-scheme: dark` |
+| `app/src/components/layout/TopBar.tsx` | Terminal tabs + Docker/Image status indicators |
+| `app/src/components/layout/Sidebar.tsx` | Responsive sidebar (25% width, min 224px, max 320px) |
+| `app/src/components/layout/StatusBar.tsx` | Running project/terminal counts |
+| `app/src/components/projects/ProjectCard.tsx` | Project config, auth mode, action buttons |
+| `app/src/components/projects/ProjectList.tsx` | Project list in sidebar |
+| `app/src/components/settings/SettingsPanel.tsx` | API key, Docker, AWS settings |
+| `app/src/components/terminal/TerminalView.tsx` | xterm.js terminal with WebGL, URL detection |
+| `app/src/components/terminal/TerminalTabs.tsx` | Tab bar for multiple terminal sessions |
+| `app/src-tauri/src/docker/container.rs` | Container creation, mounts, env vars, inspection |
+| `app/src-tauri/src/docker/exec.rs` | PTY exec sessions for terminal interaction |
+| `app/src-tauri/src/docker/image.rs` | Image building/pulling |
+| `app/src-tauri/src/commands/project_commands.rs` | Start/stop/rebuild Tauri command handlers |
+| `app/src-tauri/src/models/project.rs` | Project struct (auth mode, Docker access, etc.) |
+| `app/src-tauri/src/models/app_settings.rs` | Global settings (image source, Docker socket, AWS) |
+| `container/Dockerfile` | Ubuntu 24.04 sandbox image with Claude Code + dev tools |
+| `container/entrypoint.sh` | UID/GID remap, SSH setup, Docker group config |
+
+## CSS / Styling Notes
+
+- Uses **Tailwind CSS v4** with the Vite plugin (`@tailwindcss/vite`)
+- All colors use CSS custom properties defined in `index.css` `:root`
+- `color-scheme: dark` is set on `:root` so native form controls (select dropdowns, scrollbars) render in dark mode
+- **Do not** add a global `* { padding: 0 }` reset — Tailwind v4 uses CSS `@layer`, and unlayered CSS overrides all layered utilities. Tailwind's built-in Preflight handles resets.
+
+## Container Image
+
+**Base**: Ubuntu 24.04
+
+**Pre-installed tools**: Claude Code, Node.js 22 LTS + pnpm, Python 3.12 + uv + ruff, Rust (stable), Docker CLI, git + gh, AWS CLI v2, ripgrep, openssh-client, build-essential
+
+**Default user**: `claude` (UID/GID 1000, remapped by entrypoint to match host)
\ No newline at end of file