# Arsitektur Sistem Zesdex

## Gambaran Umum

Zesdex adalah autonomous AI coding agent berbasis TUI, dibangun dengan **Rust** menggunakan clean architecture berlapis. LLM client dibungkus dalam tool-use harness dengan 37+ built-in tools — file ops, git, shell, LSP, MCP, subagent orchestration, dan lainnya.

## Struktur Workspace

```
zesdex/
├── apps/
│   ├── domain/           # Layer 1: Pure entities, traits, value objects
│   ├── application/      # Layer 2: Use-case services
│   ├── infrastructure/   # Layer 3: Semua I/O (LLM, DB, tools, MCP, LSP)
│   ├── interfaces/
│   │   ├── tui/          # Ratatui terminal UI
│   │   ├── api/          # Axum REST API
│   │   ├── daemon/       # Unix socket daemon
│   │   ├── ws/           # WebSocket server
│   │   ├── grpc/         # gRPC server
│   │   └── web/          # Web frontend
│   ├── gateway/          # CLI entry point & dispatcher
│   └── bootstrap/        # Initial data seeder
```

## Dependency Graph Antar Layer

```
gateway/bootstrap
       │
       ▼
   interfaces/*  (tui, api, daemon, ws, grpc, web)
       │
       ▼
 infrastructure  ─── implements ──▶  domain ports
       │
       ▼
  application    ─── depends on ──▶  domain traits
       │
       ▼
    domain        (zero framework deps: serde, chrono, uuid only)
```

> **Aturan**: layer bawah tidak boleh tahu tentang layer atas. `domain` tidak import apapun dari `infrastructure` atau `interfaces`.

## Process Modes

| Mode | Flag | Keterangan |
|------|------|------------|
| **TUI** | *(default)* | TUI + agent loop dalam satu proses |
| **Daemon** | `--daemon` | Agent berjalan di background via IPC socket |
| **Attach** | `--attach <id>` | TUI terhubung ke daemon yang sedang berjalan |
| **REST API** | `--api` | HTTP server (default port 8080) |
| **WebSocket** | `--ws` | WS server (default port 8081) |
| **gRPC** | `--grpc` | gRPC server (default port 50051) |
| **Web** | `--web` | Static web frontend (default port 3000) |

## Alur Data (Single-Process Mode)

```
Keyboard/Event
      │
      ▼
controller/input.rs: handle_key()
      │  returns Vec<Action>
      ▼
action.rs: apply_action(&mut AppStateRest)
      │  state dimutasi in-place
      ├──▶ turn.rs: spawn_agent_turn()  ──▶  background thread
      │         │
      │         ├─ LLM call (blocking reqwest)
      │         ├─ tool execution (Tool trait)
      │         └─ push TurnEvent ke queue
      │
      ▼
run.rs: run_loop_inner()
      │  drain TurnEvent setiap tick
      │  skip render jika dirty=false
      ▼
view/: draw frame ke terminal (ratatui)
```

## File Kunci

| File | Peran |
|------|-------|
| `apps/gateway/src/main.rs` | CLI entry point, parse args, dispatch ke mode |
| `apps/interfaces/tui/src/state.rs` | `AppStateRest` — single source of truth state TUI |
| `apps/interfaces/tui/src/action.rs` | `apply_action()` — satu-satunya tempat state dimutasi |
| `apps/interfaces/tui/src/run.rs` | Event loop: render → poll → handle → tick |
| `apps/interfaces/tui/src/turn.rs` | Spawn agent turn di background thread |
| `apps/interfaces/tui/src/view/mod.rs` | Top-level render pipeline + `pre_render` hook |
| `apps/infrastructure/src/llm/` | LLM client (streaming + non-streaming) |
| `apps/infrastructure/src/tools/` | 37 tool implementations |
| `apps/domain/src/core/` | Entity inti: `ChatMessage`, `Role`, `Store`, `Tool` trait |

## IPC Protocol (Daemon Mode)

```
┌──────────┐  Unix domain socket  ┌──────────┐
│  Client   │ ◄──────────────────► │  Daemon  │
│  (TUI)    │  [4-byte len][JSON]  │  (agent) │
└──────────┘                       └──────────┘

Client  ──Action──▶  Daemon (apply_action → state mutasi)
Daemon  ──StatePayload──▶  Client (render snapshot)
```

## Lints & Kualitas Kode

Semua workspace crate menerapkan lint ketat di `Cargo.toml`:
- `unused`, `dead_code`, `unreachable_code` → **deny**
- `unused_imports`, `unused_variables`, `unused_mut` → **deny**
- `clippy::all` + `clippy::pedantic` → **warn**

## Release Profile

`opt-level=3`, `lto="fat"`, `codegen-units=1`, `panic="abort"`, `strip="symbols"`