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Joe Mooring
5559263326
When a module provides a config key whose value is a slice (e.g. cascade or permalinks), and the site config declares the same key as a map with only a merge strategy marker (_merge = 'deep'), the types do not match and Params.merge silently dropped the module's value, leaving the site with no effective cascade or permalink config from the module. Fix Params.merge so that when the destination value is an empty Params (IsZero — only the _merge key is present) and the source value is a non-Params type, the source value is used provided the user-declared merge strategy is not 'none'. This honours the explicit _merge directive regardless of the surrounding shallow-merge context. Closes #13869 Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>