Route direct and parallel call_subordinate execution through one reusable, persisted A1/A2 child-context lifecycle.
Keep failed children resumable with reset=false and cover sibling reuse, recursive numbering, persistence, and nested task ownership.
Normalize legacy global settings that still select the internal default profile to Agent 0. This keeps fresh chats aligned with the visible profile catalog while preserving existing chat selections.
Add per-scope availability, duplication, active-profile status, and inline project selection while keeping the profile switcher synchronized with runtime state.
Reconcile unavailable profiles at explicit disable, deletion, project-transition, and context-creation boundaries; polish validation, prompt layout, deletion, and completion states; and extend focused backend and WebUI coverage.
Validate call_subordinate profile arguments against available agent profiles so missing profiles fail as repairable errors. Persist each agent's profile in saved chats and avoid flattening existing subordinate profiles during profile switches, settings refresh, or restart reload.
