Hi camillo I like the pattern damien told me you are applying for your configuration. Could you explain them? I understood: baseline48: spec <version: '4.8-baseline'> spec repository: 'http://www.smalltalkhub.com/mc/Moose/Moose/main'. ⦠spec project: 'Metanool' with: [ spec className: 'ConfigurationOfMetanool'; version: #development; file: 'ConfigurationOfMetanool'; repository: 'http://www.smalltalkhub.com/mc/Moose/Metanool/main' ]. ⦠=> baseline48: spec <version: '4.8-baseline'> spec repository: self repositoryUrlString ⦠spec project: 'Metanool' with: [ spec className: 'ConfigurationOfMetanool'; version: #development; file: 'ConfigurationOfMetanool'; repository: 'http://www.smalltalkhub.com/mc/Moose/Metanool/main' ]. ⦠repositoryUrlString ^ 'http://www.smalltalkhub.com/mc/Moose/Moose/main'. specMetanoolConfiguration: spec spec className: 'ConfigurationOfMetanool'; version: #development; file: 'ConfigurationOfMetanool'; repository: 'http://www.smalltalkhub.com/mc/Moose/Metanool/main' I like the idea to avoid duplication at the configuration level. Now damien mention a dev and stable baseline Stef