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docs(action): clarify embodiment-specific action dimensions - #334

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sylvesterkaczmarek:docs/clarify-action-dimensions-220
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sylvesterkaczmarek wants to merge 1 commit into
NVIDIA:mainfrom
sylvesterkaczmarek:docs/clarify-action-dimensions-220

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Summary

  • clarify that action-vector dimensions are tied to the selected registered embodiment/domain
  • explain that changing a trained domain's input width is not a drop-in way to use arbitrary action dimensions
  • point readers to the Cosmos Framework action-domain registry and note the dataset-defined forward-dynamics exceptions

Why

Issue #220 asks whether Cosmos3 can accept arbitrary action-space dimensions such as 12D, 16D, or 18D. The current Cosmos Framework validates domain_name against the action-domain registry and validates forward-dynamics action width against the registered raw dimension for ordinary domains. The cookbook currently lists example dimensions but does not state this constraint explicitly.

Validation

Documentation-only change. Cross-checked against the current Cosmos Framework action inference path and EMBODIMENT_TO_RAW_ACTION_DIM registry.

Closes #220

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sylvesterkaczmarek force-pushed the docs/clarify-action-dimensions-220 branch from 97db5d0 to a5d7419 Compare September 30, 2026 17:27
@sylvesterkaczmarek

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Refreshed this docs PR onto current main today. It is now 0 commits behind and mergeable, and the diff remains limited to the intended documentation file. This has been quiet for over two weeks. Could a maintainer please review/merge it, or let me know if any wording change is needed?

Refreshed onto current upstream.

Signed-off-by: Sylvester Kaczmarek <[email protected]>
@sylvesterkaczmarek
sylvesterkaczmarek force-pushed the docs/clarify-action-dimensions-220 branch from a5d7419 to bbb77f1 Compare September 30, 2026 17:41
@sylvesterkaczmarek

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Could a maintainer review this action-dimension clarification and approve the waiting workflow? Please let me know if the wording needs changing.

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action Space and the embodiment

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