Open the sandbox before you commit to the rail.
Reactor is not protocol-ops tooling for a system you already run. It is a strategy sandbox for DeFi market structure: pick the rail, run the scenario suite, and learn where the design fails before implementation starts.
Not a runtime simulator for a live protocol. Not observability. Not transaction debugging. Reactor sits further upstream: it is where teams decide what kind of DeFi system to build.
A runnable perp sandbox for operators who want to own the engine.
A runnable EVM perp sandbox on a modern operator stack: CLOB matching, funding rate, liquidation scanner, insurance fund, and ADL, all exposed as a scenario surface you can inspect, replay, and fork.
A CU-honest perp sandbox for teams that want Solana-native market structure.
An account-model honest, CU-budget aware Solana perp sandbox. Built on the same primitive shapes as the EVM Perp Sandbox but native to Solana's runtime constraints, with scenario evidence instead of hand-wavy architecture claims.
A shared-risk sandbox for desks that want one engine across lending, perp, and spot.
A runnable EVM prime broker sandbox: cross-margin lending, perp, and spot under one shared risk engine, with portfolio-level health checks driving liquidation logic across the whole book.
A compliance-aware sandbox for institutional Solana rails that still want speed.
A runnable Solana prime broker sandbox fusing Token-2022 transfer hooks, on-chain compliance gates, DvP atomic settlement, and cross-margin lending into one operator surface.
These are four sandboxed market-structure bets in tomorrow's stack: EVM perp, Solana perp, EVM prime brokerage, and compliance-native Solana prime.
If the sandbox matters, your team will want the source.
Reactor shows you where the design bends. Dojo trains the operator who can cut the primitive open and ship a better one.