Plan step 41 (ii): the design guard needs the set of files an application's CSS entry pulls in, transitively, to check whether a package tag's stylesheet is among them — reusing bundle()'s own import resolution and cache rather than re-implementing @import parsing. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9