Interface: GroupMember

One member of a composition. Shape is uniform across composition kinds — Parallel branches, Sequence steps, Loop body, Conditional branches, Agent tools/slots, LLMCall slots all map to this.

memberId is the stable id the composition assigned (e.g. legal for a Parallel branch, step-classify for a Sequence step, body for a Loop). Consumers can correlate this with the SpecNode's subflowId / id to drill in.

runner is the underlying Runner instance — useful for the consumer to call member.runner.getSpec() for the nested chart or member.runner.getUIGroup() for the nested translation result (when the same translator was threaded through that runner's construction).

uiGroup is the member's already-translated output. Populated when the consumer threaded the same groupTranslator reference into each member's construction; undefined otherwise.