Playground — zero install

The Playground runs the real CFDL compiler and engine in your browser via WebAssembly. Nothing to install, nothing leaves your machine — models compile and run locally in the page.

What it can do

• Full compile + run with diagnostics as editor markers and live metrics.
• use pack against the embedded packs (energy, cre, credit, opco).
• Seeded Monte Carlo — the engine's deterministic seeding is wasm-clean, so results match the CLI byte for byte.

Limits vs the CLI

• Single-buffer editing (no multi-file models or imports).
• No filesystem output — results render in the page rather than writing ir.json / results.json.
• Long Monte Carlo runs are constrained by the browser tab.

When you outgrow it: install the CLI or the Python SDK.