implement-bead
Use when a step-bead is ready for autonomous execution. Reads the step-bead and labels, resolves execution context, decides dispatch shape from metadata, and either invokes an orchestration skill in-session or runs a single direct dispatch via the per-dispatch primitive documented below. The invoking agent is the ORCHESTRATOR only — workers are dispatched via the Agent tool from the top-level session. Loop ownership lives in `ralf-implement` / `ralf-review`, never in this skill.