Use when a legacy prompt, old workflow, or older skill reference explicitly names `integration-regression-sentinel`; this retired skill exists to redirect that request to `orchestration-router` for integration and regression gating across multi-track work. Do not select it for new tasks.
Retired from active routing.
Integration/regression gating is now owned by orchestration-router so one coordinator can route and verify end-to-end without extra handoff overhead.
Use orchestration-router and include an explicit final integration verification phase in its loop.
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