July 15, 2026 - Site source navigation warnings

Find unresolved navigation page targets without blocking valid source sync and deploy workflows.

Site source validation now reports an enabled navigation page_key that does not resolve to an enabled page-registry entry as a classified warning.

Affected surfaces

Validation responses include theme_navigation_target_missing in warnings[] with navigation category, warning severity, parameter path, and source context.
Nested navigation items are checked using registry paths declared by the theme; arbitrary URL links are not treated as page-registry targets.
Warnings leave valid=true and do not block source save, preview, package, deploy, or owner-gated publication.
The CLI prints warnings to stderr and continues without an interactive confirmation. Validation errors remain blocking.

Review warnings and either add/enable the target page-registry entry or remove the stale navigation target. No client migration is required.