Root AGENTS.md User Preferences gains the binding agent-agnostic rule (an
agent editing .gitignore discovers it at the root without walking into
.fossil-settings/): .gitignore canonical, ignore-glob hand-derived, same work
unit, semantic differences translated per .fossil-settings/AGENTS.md. That
child doc's sync procedure is retitled from "when asked" to mandatory for
any ignore-rule change, with the one-sided-change prohibition stated.
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com