* feat(#2508): Phase 4 Option A — runtime-aware subagent dispatch via resolve-dispatch-type query (#2505) * fix(#2508): prose-variant preamble (avoid scanner-tripping literals) + namedDispatch===false-only mapping * fix(#2508): remove leftover old-preamble lines (keep prose variant only) * fix #2508: prose-only reference file * test #2508: regen golden install parity after workflow preamble additions * fix #2508: remove preamble from plan-phase.md (Phase 6 capstone ceiling); regen size+golden baselines * docs(changeset): backfill PR #2525 for Phase 4 (#2508)