You'll notice
Resume now refuses Windows UNC session homes and flags paths whose ancestry cannot be verified.
Resume-time checks for cross-host session homes and worktree roots now also refuse Windows UNC-style \\...\network\ paths, and paths whose ancestry can't be verified are flagged with unreadableAncestry: "unverified", in addition to the previous cross-device and symlink checks.
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Anthropic's release notes agree
Changed --add-dir, /add-dir, and additionalDirectories to refuse network paths (UNC shares, /net/<host> automounts) with a message before…