Which schema keys the standards involve

The gate of the standards check for a capsule: the schema keys that the applicable standards (design, manufacturing, capsule) constrain, set or use as a condition, and whether any standard depends on the piece as built by the engine (needs_result). The Studio checks the standards (POST /v3/compute/standards) only when one of these keys changes, before computing. A model extracts the keys once; they are cached on the capsule until the standards or the schema change. has_standards is false when there are none (reason NO_STANDARDS); with no OpenRouter key the keys are empty (reason OPENROUTER_KEY_MISSING).