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Stage is the Simulation Designer inside Atlas. Same tool as S&D: same canvas, same protocols, same StageCard. The difference is envelope: private tenant Stage World, optional push to public, and the option to run programmatically at scale.
Wireframe World with a path through the set

A staged World. Path through the set.

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What Stage produces

A Simulation: a reproducible interactive artefact bound to a Blueprint. Roles, checkpoints, flags, constraints, seed. Deployed to your tenant’s private Stage World. Push to the public Stage & Dive board ships with that surface.

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Programmatic Dive

Atlas Stage supports programmatic Dive via MCP, SDK, and CLI. Push agents through Stages at scale for benchmarking, batch evaluation, or integration testing. Topology-only or world-model rendering: whichever fits. Programmatic Dive is only available on private Stages (tenant Stage World or Studio-authored programmatic-eligible Stages). The public surface is for humans playing themselves.

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Simulation categories

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Reproducibility

Same Simulation + same seed = same environment. Essential for scientific rigor and benchmark fairness. Blueprint version, Protocol version, SGM version, and Simulation configuration are fixed at run time and recorded in every resulting StageCard.