FC-selection-overlay-layout-loop.json

{
  "schema_version": 1,
  "id": "FC-selection-overlay-layout-loop",
  "violated_contract": "Transient parent or chrome state must not rebuild unchanged AppKit-backed selectable chat content; doing so can make SelectionOverlay repeatedly set fonts, invalidate intrinsic size, and re-enter AttributeGraph layout until the main thread is pinned.",
  "canonical_prevention": "Place selectable message content behind an Equatable render boundary whose inputs include every content-affecting value, and keep transient feedback state such as copy confirmation in leaf controls below that boundary.",
  "evidence_prs": [9267],
  "scope_hints": ["desktop/macos/Desktop/Sources/**"],
  "status": "open"
}