plugin.js

module.exports = {
  async activate() {
    SL.graph.onDidChangeSourceNodeContent(({ node }) => {
      if (!node || node.subtype !== 'md') return;

      let diagnostics = [];
      if (node.raw.match('swagger')) {
        diagnostics = [
          {
            code: 'swagger-check',
            severity: 0,
            message: 'get outta here swagger!'
          }
        ];
      }

      SL.graph.setSourceNodeDiagnostics(node.id, diagnostics);
    })
  },
};