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* feat: add native Grok agent support * no-mistakes(review): Preserve Grok invocation environment * no-mistakes(document): Clarify Grok’s pipeline-only skill role * docs: complete native Grok ExecPlan * no-mistakes(document): Clarify Grok opt-out documentation * no-mistakes: apply CI fixes --------- Co-authored-by: Boris <boriza@users.noreply.github.com>