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Dalang Docs & Handbook

Architecture Overview

Dalang is organized into four primary subsystems:

  • Core Engine (product/crates/dalang-core) — Wasmtime host, WIT binding, Kelir boundary
  • Edge Runtime (product/crates/dalang-edge) — Scale-to-zero, memory pooling, shadow instances
  • Mesh Runtime (product/crates/dalang-mesh) — Embedded LibSQL, Raft consensus, Gamelan router
  • Plugin Runtime (product/crates/dalang-plugin) — Capability proxy, VFS, hot-swapping

WIT Contracts

All inter-component communication is defined in product/wit/. See the WIT Reference for full specifications.

Architecture Diagram

┌─────────────────────────────────────────────────────────────┐
│                         CLI / SDK                            │
├─────────────────────────────────────────────────────────────┤
│                         Plugin Runtime                       │
│              (capability proxy, VFS, hot-swap)               │
├─────────────────────────────────────────────────────────────┤
│         Mesh Runtime              │       Edge Runtime       │
│  (LibSQL, Raft, Gamelan router)  │  (scale-to-zero, memory  │
│                                   │   pooling, shadow inst.) │
├─────────────────────────────────────────────────────────────┤
│                         Core Engine                          │
│            (Wasmtime host, WIT binding, Kelir)               │
└─────────────────────────────────────────────────────────────┘

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