WASM Workflow

Environment

Baseline Tools

• Browser with DevTools WASM support (Chrome/Edge/Firefox latest stable).
• Node.js LTS for local tooling and scripts.
• Toolchain for chosen language (Rust + wasm-pack, or C/C++ + Emscripten).
• WABT for wat2wasm and wasm2wat inspection.

Setup Checks

rustc --version
cargo --version
wasm-pack --version
node --version
wat2wasm --version

Project Organization

/wasm-app
  /web
    index.html
    app.js
  /wasm
    src/
    Cargo.toml
  /contracts
    interface.md
  /tests
    wasm-boundary.test.js
  package.json

• Keep module interface contracts in a dedicated folder.
• Separate host UI code from compute module code.
• Add boundary tests for imports, exports, and memory assumptions.

Build Pipeline

Pipeline

1. Compile WASM module.
2. Generate bindings/adapters.
3. Run host tests and WASM boundary tests.
4. Bundle web artifacts with cache/version strategy.

Build Script Example

wasm-pack build wasm --target web
npm run test
npm run build:web

AI Workflow

Prompt Structure

Task: optimize checksum calculation in wasm module.
Constraints: preserve public exports, keep memory layout unchanged.
Validation: wasm tests + host integration tests.
Review focus: correctness, binary size, interop safety.

Control Rules

• Require AI changes to include touched interfaces and test commands.
• Reject AI edits that modify interface contracts without migration notes.
• Use AI for drafts and refactors, then run deterministic tests before merge.

Engineering Notes

WASM project stability depends on explicit contracts. Organize for interface clarity first, then optimize performance.

Common Mistakes

• Mixing host and module logic in one code directory.
• Adopting AI-generated changes without boundary tests.
• Skipping versioned cache invalidation for updated .wasm binaries.

Practice Scope

Set up a minimal WASM repository with one exported compute function, one host adapter, and one AI-reviewed pull request checklist.

Back to roadmap: WASM Roadmap