"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): A runtime refusal narrowing on two access guards, not a metadata change: no spec key, export, option or stored shape is removed, renamed or re-shaped, so there is no tombstone and nothing for `objectstack migrate meta` to rewrite. What narrows is which requests the two guards admit: a request admitted only because the guard's own read faulted is now refused with 503, and every answer from a healthy read is unchanged. The other categories are closed on facts: both packages publish (not unpublished); no ADR-0087 id covers either guard and this diff adds none (not registered / already-registered); and no published interface or type changes (not runtime-interface-only / type-surface-only).