ECOOP 2026
Mon 29 June - Fri 3 July 2026 Brussels, Belgium

The 6th workshop on Theory and Practice of Decentralised and Local-First Software is a joint effort combining two workshops: PLF (Programming Local-first Software) and PLAID (Principles, Theory, and Practice for Decentralised Applications). These two workshops had significant overlap in their topics, and we aim at bringing together their communities of researchers and practitioners. Submissions suitable for either of the earlier workshops are well-suited to PLF+PLAID.

About

Ubiquitous connectivity and the affordable availability of user devices, ranging from smartphones to desktops, have made applications that support multi-device and collaborative use increasingly common. These devices and the networks they belong to possess vastly different characteristics. Data centres offer nearly unlimited resources and high availability, while edge devices often have limited resources, experience frequent connectivity loss, and exhibit significant dynamism. Shifting away from the cloud enables the use of edge resources, with potential benefits for privacy and costs. In this scenario, collaborative applications must be decentralised; Local-First Software operates and stores its data locally while still enabling collaboration, without relying on the cloud.

Several specific solutions already exist for designing and programming decentralised and local-first software, but the task remains difficult. Our workshop aims to bring together researchers and practitioners to share insights into the theoretical and practical challenges of developing decentralised applications in today’s computing ecosystems, and to foster the research and development of suitable solutions in this area.

The PLF+PLAID workshop is co-organised by the Horizon Europe project #101093006 TaRDIS (Trustworthy And Resilient Decentralised Intelligence For Edge Systems).