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Echelon

**Version**: 1.2.0 **Last Updated**: 2025-01-01 **Status**: Production **Parent**: [00-OVERVIEW.md](00-OVERVIEW.md) **Philosophy**: [01-COMPUTATIONAL_CHOREOGRAPHY.md](01-COMPUTATIONAL_CHOREOGRAPHY.md) **Complement**: [02-TRAJECTORY_OS.md](02-TRAJECTORY_OS.md) (long-horizon OS)

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**Version**: 1.2.0 **Last Updated**: 2025-01-01 **Status**: Production **Parent**: [00-OVERVIEW.md](00-OVERVIEW.md) **Philosophy**: [01-COMPUTATIONAL_CHOREOGRAPHY.md](01-COMPUTATIONAL_CHOREOGRAPHY.md) **Complement**: [02-TRAJECTORY_OS.md](02-TRAJECTORY_OS.md) (long-horizon OS) Echelon is the **real-time embodied physics engine** that processes motion at millisecond timescales. It answers: > **What is happening now, in the body, and how do we keep this moment coherent?** Echelon **owns the physics of embodiment**: latency, stability, coherence, and real-time response. Nothing in TrajectoryOS or RAG++ can replace this capability. | Regime | Echelon | TrajectoryOS | |--------|---------|--------------| | **Latency** | Milliseconds (existential) | Seconds (acceptable) | | **State** | Continuous dynamical manifold | Discrete memory turns | | **Question** | How do we keep coherence? | What does this mean? | | **Mode** | Act, not reason | Reason, then act |

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