"The ubuntu-latest label will migrate to Ubuntu 26 beginning October 19, 2026. For more information, see https://github.com/actions/runner-images/issues/14748"

"The ubuntu-latest label will migrate to Ubuntu 26 beginning October 19, 2026. For more information, see https://github.com/actions/runner-images/issues/14748"

ADR-0087 exemption (no-migration-prescription): No metadata moves: no spec key, authorable spelling, object definition, stored row or stored shape is added, removed, renamed or re-shaped. What changes is which input sets the template dialect's formatter locale: the evaluate context's own `locale` field instead of a root named `locale`. A template that names a root `locale` keeps compiling and rendering; its hole still prints that value, only the number and date formatting no longer follows it. There is nothing for `objectstack migrate meta` to rewrite. The other categories are closed on facts: every package publishes (not unpublished); no ADR-0087 id is named or touched (not registered or already-registered); and no runtime interface, type or export is removed or narrowed: `EvalContext` gains an optional member and `fillTemplateHoles` an optional trailing argument (not runtime-interface-only, type-surface-only or runtime-export-retired).