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name: package-apis description: "Explains VLA-Adapter Prismatic/VLA APIs, robot constants, checkpoint layouts, LoRA merge, and HF conversion utilities." disable-model-invocation: true metadata: disco-role: operating license: MIT

Package Layout/API Reference (external-checkout adapter)

This sub-skill documents the native package layout and public API surface; it does not implement or vendor that package. The generated skill directory contains only this documentation, references, and the read-only checkpoint layout validator. The native prismatic/, vla-scripts/, experiments/robot/, and conversion scripts remain in the separate checkout.

Before inspecting any native source or installed package, set the absolute root and enter it:

export VLA_ADAPTER_REPO_ROOT=/abs/path/to/VLA-Adapter
cd "$VLA_ADAPTER_REPO_ROOT"
python -m pip install -e "$VLA_ADAPTER_REPO_ROOT"

External prerequisites include the native checkout, its base Python package dependencies, a compatible checkpoint, and (only for conversion or model execution) the matching CUDA/Hugging Face stack. This sub-skill is not self-contained and does not provide load, load_vla, action-head, projector, LoRA-merge, or HF-conversion implementations. It does not load weights or execute a model.

Scope

Use this sub-skill to read references/api-reference.md and references/prismatic-apis-and-conversion.md, map native entrypoints and checkpoint files, or run the local layout validator. Treat the API signatures and conversion inventory as reference facts, not copyable implementations.

Run the skill-local validator by absolute skill path:

python "$VLA_ADAPTER_SKILL_ROOT/sub-skills/package-apis/scripts/check_checkpoint_layout.py" \
  --checkpoint "$VLA_ADAPTER_REPO_ROOT/outputs/CHECKPOINT" --help

The validator only inspects local files. For native operations, use the native entrypoints from <absolute-repo-root> after separately confirming their prerequisites; this adapter never invokes them.