Diagnostic codes: selector-empty: A group that the config declares, a path pattern written inline in a rule, or the `folders` of a folder rule matches nothing, so no rule about it can fire. # selector-empty > A group that the config declares, a path pattern written inline in a rule, or the `folders` of a folder rule matches nothing, so no rule about it can fire. Config problems. This text is what `archangel docs selector-empty` prints. A group that the config declares, a path pattern written inline in a rule, or the `folders` of a folder rule matches nothing, so no rule about it can fire. ## Example ```json { "selectors": { "views": "**/*.viewz.tsx" } } ``` ```ts // rule({ name: 'legacy', files: 'src/legasy/**', mayNotImport: 'src/next/**' }), and no folder src/legasy // rule({ name: 'readme', folders: 'modules/*', mustContain: 'README.md' }), and no folder modules ``` The message names the group and its definition, or the rule and its pattern. A group counts every file the walk visits, not only source files and not only files an import reaches, so `**/*.png` is not empty while the repository has an image. In the editor, a group can become empty after an edit, such as `{ directive: 'use client' }` when the last client file loses its directive, and the server reports it then. Three cases are exempt, because matching nothing is how they pass or changes nothing: the files or folders of a `mustNotExist` rule, a pattern a rule writes inline only inside a `not`, such as an exemption list shared by rules whose globs match nothing in this repository yet, and everything a preset declares. A group the config declares is not exempt inside a `not`, because declaring it says the repository has such files. A preset’s groups and parts that match nothing are listed in the summary instead; a preset that matches nothing at all is [`preset-empty`](/archangel/reference/diagnostics/preset-empty/). ## What to do Fix the pattern, or remove the group or the rule. A part that matches nothing is [`element-empty`](/archangel/reference/diagnostics/element-empty/).