The updated Consolidated Framework for Implementation Research (CFIR) incorporates feedback from experienced users to improve its applicability and relevance. The original CFIR, one of the most cited frameworks in implementation science, has been updated to address critiques, including better centering innovation recipients and adding determinants related to equity. The updates include revisions to existing domains and constructs, as well as the addition, removal, or relocation of constructs. These changes ensure the framework remains relevant as implementation science evolves. The CFIR is a determinant framework that helps identify barriers and facilitators to implementation effectiveness. It is used to guide implementation strategies, generate hypotheses, and retrospectively explain outcomes by assessing differences in determinants across settings. The updated CFIR reflects feedback from a growing community of users and maintains longitudinal consistency by mapping constructs back to the original framework. Key updates include renaming constructs to improve clarity, adding new constructs to address missing themes, and reorganizing domains to better capture individual-level characteristics. The Innovation domain now focuses on the "thing" being implemented, while the Outer Setting domain includes new constructs related to local attitudes and conditions. The Inner Setting domain has been expanded to include constructs related to culture and equity. The Individuals domain has been reorganized into two subdomains: Roles and Characteristics, with new constructs based on the COM-B system. The updated CFIR also includes guidance on operationalizing constructs and using the framework to assess implementation outcomes. It emphasizes the importance of considering equity and justice in implementation research, encouraging collaboration with equity experts to ensure the framework addresses systemic issues. The CFIR is a public resource and must continue to evolve through feedback from a broader community of users. The updated CFIR provides a more comprehensive and adaptable framework for implementation research, reflecting the dynamic nature of the field. It encourages ongoing critique and development to ensure its continued relevance and effectiveness in guiding implementation efforts.The updated Consolidated Framework for Implementation Research (CFIR) incorporates feedback from experienced users to improve its applicability and relevance. The original CFIR, one of the most cited frameworks in implementation science, has been updated to address critiques, including better centering innovation recipients and adding determinants related to equity. The updates include revisions to existing domains and constructs, as well as the addition, removal, or relocation of constructs. These changes ensure the framework remains relevant as implementation science evolves. The CFIR is a determinant framework that helps identify barriers and facilitators to implementation effectiveness. It is used to guide implementation strategies, generate hypotheses, and retrospectively explain outcomes by assessing differences in determinants across settings. The updated CFIR reflects feedback from a growing community of users and maintains longitudinal consistency by mapping constructs back to the original framework. Key updates include renaming constructs to improve clarity, adding new constructs to address missing themes, and reorganizing domains to better capture individual-level characteristics. The Innovation domain now focuses on the "thing" being implemented, while the Outer Setting domain includes new constructs related to local attitudes and conditions. The Inner Setting domain has been expanded to include constructs related to culture and equity. The Individuals domain has been reorganized into two subdomains: Roles and Characteristics, with new constructs based on the COM-B system. The updated CFIR also includes guidance on operationalizing constructs and using the framework to assess implementation outcomes. It emphasizes the importance of considering equity and justice in implementation research, encouraging collaboration with equity experts to ensure the framework addresses systemic issues. The CFIR is a public resource and must continue to evolve through feedback from a broader community of users. The updated CFIR provides a more comprehensive and adaptable framework for implementation research, reflecting the dynamic nature of the field. It encourages ongoing critique and development to ensure its continued relevance and effectiveness in guiding implementation efforts.