In France, thanks to the deployment of 37 million Linky smart meters, a vibrant open-source community has emerged, developing smarter, greener, and more open energy-management systems powered by Linky’s locally emitted data. Enedis, the main French DSO, now works alongside this community to accelerate the use of its meters’ data for the energy transition. Open hardware, open software, open data—all of this is key to meeting the challenges !
Presenting the Energy System Description Language (ESDL) open-source community, which is currently being built around the open standard ESDL and the ecosystem of open-source tools that work with ESDL. There is a dozen tools that are being used by several companies and initiatives to design energy hubs, heat networks and develop scenario's to best integrate new battery, hydrogen, solar and wind assets within grid with limited available capacity.
Akkudoktor-EOS (Energy Optimization System) is an open-source platform designed to generate highly optimized energy management plans for home energy management systems. Initially developed by Dr. Andreas Schmitz (“Akkudoktor”), EOS has been publicly available for just over a year and has already built a community of users who integrate it into their home automation environments.
At its core, EOS is a self-hosted server that calculates optimal schedules for batteries, electric vehicles, and household devices. These plans are derived from user configuration, real measurement data, and automatically retrieved or self-generated forecasts. EOS focuses on long-term optimization over a day or longer. The home automation system manages short-term control. Together, they combine strategic planning with real-time execution, delivering the best of both worlds in home energy management.
Common applications include optimizing consumption under dynamic electricity tariffs, ensuring cost-efficient EV charging, shifting flexible loads to cheaper periods, and connecting seamlessly with systems such as Home Assistant or NodeRED.
EOS stands out through its genetic algorithm, enabling optimization of any behavior that can be simulated—without the limitations of linear or convex models. Non-linear battery degradation, grid-stress signals, comfort models, or heat pumps with non-linear COP fields can be used directly, without artificial simplification. This makes EOS highly modular and flexible, allowing new components or physical models to be added and immediately included in the optimization.
Optimally planning the energy flows across multiple sites becomes more important, e.g. for orchestrating the aggregated flows due to grid congestion, or for implementing energy sharing. This approach can break bottlenecks and increase savings - as such, energy communities are an important topic for the European Commission.
In this talk, we present our ongoing work towards a Community Energy Management System (CEMS) with FlexMeasures. We discuss our architectural approach: optimizing the flows for each sites by themselves and then adding an orchestration layer on top. This approach is being tested in a project with TNO in the Netherlands. The goal is to manage neighbourhoods as well as commercial sites optimally.
In addition, we want to discuss how scalable any CEMS system can be, as many circumstances and conditions often vary, per site and per energy community. We chose our CEMS architecture approach for this reason, but versatility has been a design principle for FlexMeasures since the beginning. In this talk, we will showcase a complete example script of a setup orchestrating a few homes. This script is written with the FlexMeasures client and is also open source. FlexMeasures being 100% scriptable is a design choice that lets many developers built just what they need in energy intelligence.
This is also an opportunity to visit some fundamental improvements we have made in the last year in the documentation of FlexMeasures and its flexibility options - both for developers and users.
Solar energy is predicted to be the largest form of power generation globally by 2040 and having accurate forecasts is critical to balancing the grid. Unlike fossil fuels, renewable energy resources are unpredictable in terms of power generation from one hour to the next. In order to balance the grid, operators need a close estimate of when and how much solar and wind power will be generated on a given day.
Open Climate Fix (an open source AI company) developed and deployed PVNet, a large ML model which forecasts solar generation for the next 36 hours. The forecasts are used by the UK electricity grid operator for real-time decision making and for reserve planning. These forecasts can save 300,000 tonnes of CO₂ and £30 million per year.
But how do we have a global impact? We decided to build a lightweight solar forecast that works anywhere in the world, which we showcased last year at FOSDEM. Combining this with every country's solar capacity, we are able to produce a solar forecast for every country in the world. In this talk, we'll demo our Global Forecast and discuss how this forecast can support grid transition as well as open-source renewable energy projects all over the globe.
Open Climate Fix is an open-source not for profit company using machine learning (ML) to respond to the need for accurate renewable energy forecasts. Connecting energy industry practitioners with ML researchers doing cutting-edge energy modelling is our aim, and one way we seek to do this is by making much of our code open-source.
Storing energy reversibly is useful. For clean energy, electrochemical batteries are one of the most attractive options. Most battery technology is proprietary, hard to recycle, and complicated to manufacture. What if that wasn't the case?
We will present our collective and individual efforts with the Flow Battery Research Collective (https://fbrc.dev/) to build open-source batteries for stationary storage applications. This includes our flow battery work, such as efforts to build a larger-format cell with simple manufacturing techniques like laser cutting and FDM printing, as well as our different experiments with flow battery electrolytes based on zinc, iodine, iron, and manganese.
We will also cover our individual efforts to build conventional, non-flow flooded batteries based on water and the above elements (including this work by the speaker Daniel: https://chemisting.com/2025/05/23/a-low-cost-open-source-cu-mn-rechargeable-static-battery/). We will discuss the economic hurdles facing practical implementations of these systems.
As a student in electronics, I was already passionate about renewable energy. Then after many years of open-source software development, I am now finally starting to engage with the Energy community. By attending various events, meeting a whole range of inspiring people, hacking around existing projects and completing a blog posts series on Digital Substations and SEAPATH, I have made the first steps in this personal journey. It is already a very rewarding one and I believe many other developers would relate to it. Open source culture and renewable energy both contribute to a more sustainable world.
This lightning talk tells the story of how I became an active contributor in the Energy community.
Standards like OCPP and ISO 15118 describe how EV charging should work, yet real-world deployments often behave differently. This session explains why a full stack of tools, testing methods, and feedback loops is essential for true interoperability, and how the open-source EVerest ecosystem has become a practical integration point for these technologies. We will show how Software-in-the-Loop testing, Golden SUT validation, conformance tooling, virtual charger parks, testing-hackathons, and cloud-based remote debugging work together to close the gap between specification and reality. The talk demonstrates how open-source reference implementations can strengthen standards, improve certification tools, and reduce interoperability pain across the EV charging industry.
OpenLEADR-rs is an opinionated, open-source Rust implementation of the OpenADR 3.0 protocol, which is already being used for real-world pilots.
In this joint presentation, Stijn van Houwelingen (ElaadNL) and Maximilian Pohl (Tweede Golf) will kick things off with a quick primer on demand response: what it is, and why it’s essential to accelerate the energy transition. From there, they’ll dive into some design decisions behind OpenLEADR-rs.
Among the decisions explored: why Rust was a good choice for the protocol and why OpenLEADR-rs did not implement real-time updates yet.
Next, the focus shifts to adoption, specifically focusing on the use case of Grid-Aware Charging in the Netherlands.
The talk then wraps up with a look at what’s next for OpenLEADR-rs, including our effort to implement OpenADR version 3.1, how developers and organizations can get involved, and what early adopters can expect in terms of support and collaboration.
See how the open-source Transformer Thermal Model helps safely push the limits of the grid.
This to lighten the net congestion problem we have in the Netherlands.
We demonstrate how simulating hotspot and oil temperatures reveals new acceptable load limits.
By sharing this model openly, we are able to work with other TSOs and DSOs to benefit and strengthen sector-wide collaboration! Within this talk we want to show you our journey in going open source and how this strengtens our effort in lighten the net congestion problem with pushing the limits of the grid!
The model: https://github.com/alliander-opensource/transformer-thermal-model Github Discussions: https://github.com/alliander-opensource/transformer-thermal-model/discussions
The lack of global access to electricity, and the push towards renewable energies and electrification requires us to develop our grids. However, globally, data of the power grids are outdated, incomplete or closed off, which makes it challenging for us to effectively plan and research grid developments.
Therefore, we created an initiative called MapYourGrid where anyone can map, contribute and own the data of our grids. We created a fully open and free toolchain, combining developed and existing free tools and software, in order to empower people around the world to be able to map their grid. Instead of reinventing the wheel, we collaborated with existing communities and incorporated existing open-source tools, as this leads to higher quality workflows and higher community impact.
By mapping the world’s power grids, anyone can learn and understand the backbone of what lets us turn our lights on, as well as owning this valuable data. This can then be used by researchers, local communities and authorities, NGO’s and many more, to help solve pressing issues our world faces. MapYourGrid: https://mapyourgrid.org/
The Smart Beach Net in The Hague is a privately owned network by an energy cooperation consisting of The City of The Hague and multiple beach pavilions. As Stedin, the regional network operator (DSO) is facing net congestion challenges, the cooperation is offering it’s flexibility of both shared and individual EV charging, batteries, heating and solar assets, to help resolving congestion.
The challenge is to design and implement a multi objective and multi layer energy management system which can optimise both on dynamic network capacity and dynamic energy tariffs. Moreover optimisation should optimise both on household/individual level with individual assets, as well as cooperation level with shared assets.
Continuing the learnings from the Amsterdam Sporenburg pilot we presented last year, we will share the latest results from Amsterdam and demonstrate the further developments in The Hague, integrating with day ahead and intraday congestion markets, introducing advanced forecasting models for consumption as well as forecasting EPEX Spot prices, and automated controlling of assets, both on individual as well as cooperation level.
The Hague pilot: https://openremote.io/solution/slim-strandnet-scheveningen-ems-stedin/ Build your open source EMS, get started: https://docs.openremote.io/docs/user-guide/domains/create-your-energy-management-system
The electricity grid faces increasing complexity as solar panels, wind turbines, EVs, and heat pumps reshape both supply and demand patterns. Grid congestion has become one of the most pressing challenges for utilities navigating this transition. Accurate short-term load forecasting is essential—not only for congestion management, but also for transport forecasts, EV charging capacity estimation, and grid loss prediction.
OpenSTEF is an open-source Python package that provides accurate short-term forecasting for all of these use cases. As demand grows beyond congestion management, we have been working with the community on a major redesign to make it more flexible and easier to adopt across different contexts and user types—from researchers and small-scale teams to large-scale deployments within complex enterprise landscapes.
In this presentation, we will share the journey and architecture of the OpenSTEF V4 redesign, how we did it, the lessons we learned, and a sneak peek of the features of the current alpha release.
To learn more about OpenSTEF, visit: https://www.lfenergy.org/projects/openstef/
In this talk, we introduce µSolarVerter, our open-hardware micro-inverter designed to support decentralized solar production while giving users full control over the information their system generates. The project grew from a simple question: how do we make small-scale solar both understandable and adaptable, without locking people into a black box?
Our presentation will be split into three parts:
We'll recap who we are and how we have been working to provide people with the tools to act on the energy transition. We'll recap our previous advancements in terms of repairability, sovererignty and cooperation.
We’ll explain what a micro-solar inverter actually is and why it is important as a tool for impact on the field. We'll walk you through the specifications of the open uSolarVerter. And the challenges we faced while designing it.
We will present you the repository of our project and the remaining challenges in terms of software and hardware related to the uSolarVerter.
Project's repository: https://github.com/owntech-foundation/micro-inverter
OwnTech's Forum: https://forum.owntech.org/
OwnTech's documentation center: https://docs.owntech.org/latest/
This talk explores the evolution of VeraGrid (formerly GridCal), a power-system simulation tool, over the past decade; From its humble and simple beginnings to a fully integrated software capable of performing all power-system calculations, ranging from electromagnetic transient (EMT) simulations to multi-year investment planning.
Throughout its development, the software has undergone seven major refactors to accommodate new functionalities. As the system evolved, the effort required for each refactor decreased, highlighting an organic, evolutionary structure shaped by practical needs and use cases.
I will discuss the challenges and insights gained during this evolution, focusing on how we integrated static network models, time-series data, transient analysis, and long-term planning. Additionally, I will cover how we overcame the challenges of multi-binary pitfalls and ensured seamless interaction between these diverse functionalities.
This session will provide an overview of how these continuous improvements have produced an open-source tool that bridges the gap between research, operational applications, and long-term infrastructure planning. See: https://github.com/SanPen/VeraGrid
PyPSA is an open-source Python framework for optimising and simulating modern power and energy systems, designed to scale well with large networks and long time series. It is made for researchers, planners and utilities with basic coding aptitude who need a fast, easy-to-use and transparent tool for power and energy system analysis.
The first public version was released in 2016 and has since gained many users and contributors from around the world, becoming one of the most widely used energy system modeling tools. In October 2025, version 1.0 was released, which now enables modeling under uncertainty with a two-stage stochastic programming framework. This allows for more realistic decision making by accounting for multiple possible futures with uncertain renewable generation, demand, and prices, rather than optimizing for a single expected scenario.
The talk will give a general overview of PyPSA and showcase the new stochastic programming functionality by solving an energy system planning problem under uncertainty. It is suitable for both experienced PyPSA users and newcomers to energy system modeling.
There is a vast ecosystem of open-source energy system modelling (ESM) tools. Hundreds of tools have been published to date, mostly originating from research organisations. However, few have gained enough traction to be considered by practitioners for infrastructure planning. If we are to make open-source the norm in decision making, we need to ensure it is possible to explore and compare the range of tools available.
This has not been possible. Until now.
In this talk, we introduce the Open Energy Modelling Tool Tracker (openmod-tracker), a platform that aggregates data on open ESM tool source code repositories and their development communities, created by Open Energy Transition with support from Breakthrough Energy GRIDS. We will share insights drawn from repository activity and user engagement, highlighting which tools demonstrate the strongest momentum and why these should be the focus of collaborative development efforts.
Complementing this, we present our open-source tool feature platform, designed to help practitioners select tools and developers identify feature gaps. Our goal is to expand the platform’s coverage and refine its taxonomy with input from the wider community. We see FOSDEM as an opportunity to kick-start this collaboration and invite you to join us in shaping the future of open-source energy modelling.
Energy systems are undergoing rapid transformation as sector coupling intensifies and variable renewable generation grows, creating a pressing need for flexible and transparent modeling tools. While many open-source frameworks offer rich features, extending them with new mathematical models typically requires writing custom software—a barrier for many analysts.
We present GEMS (Generic Energy Systems Modelling Scheme), a high-level modelling language designed to make multi-energy system adequacy and planning studies both more expressive and more accessible. GEMS brings model definitions out of the codebase and into simple YAML configuration files, where users describe variables, parameters, and constraints using natural mathematical expressions. These expressions are parsed into abstract syntax trees and automatically expanded—across time structures, scenario trees, and study data—into a complete optimization problem. This model-agnostic architecture enables rapid experimentation, lowers development and maintenance costs, and promotes true reusability: adding a new component requires no code, only data. The language is already supported in Antares Simulator and in the Python package GemsPy.
We present how GEMS could paves the way for interoperability between modelling tools, offering a neutral and extensible modeling layer that can be shared across the open-source energy modeling ecosystem.
When choosing observability platforms, we rarely consider their carbon footprint. Yet every metric collected, every log retained, and every dashboard query consumes energy and at scale, the environmental impact becomes significant. This talk explores the principles and real-world advantages of green observability. We’ll examine how open source observability ecosystems are beginning to address carbon awareness and promote more efficient data practices. Through examples, I’ll show how teams can reduce ingestion volume, lower storage requirements, improve performance and enhance reliability through green coding practices. By linking observability design choices to the Green Software Foundation’s principles, attendees will see how green observability supports a broader sustainable software strategy. They’ll also learn why sustainability in observability isn’t just an organizational obligation, it's a responsibility each engineer carries in the way we collect, store, and interpret data.
E-Paper technology is often highlighted for its reflective readability and near-zero static power consumption, making it an attractive choice in a world where digital displays are becoming increasingly ubiquitous. From public transport signage to smart meters and IoT devices, the number of deployed displays continues to grow—and with it, the cumulative energy they consume. A sustainable future does not require removing or avoiding displays, but rather designing and driving them intelligently.
If you work with E-Paper displays, you will inevitably encounter a situation where the manufacturer provides only partially documented driver code—or, in many cases, a binary blob packed with initialization parameters and so-called waveform lookup tables (LUTs). Experimenting with these values often leads to unwanted side effects such as ghosting, low contrast, long-term image retention, or even permanently damaged panels. A solid understanding of the physics behind E-Paper driving is essential for safely modifying LUTs and optimizing them for lower active energy usage through improved waveform design and voltage-generation strategies. In this talk, we break down the electrical and algorithmic principles that govern E-Paper operation and show how waveform LUTs influence update speed, ghosting behavior, image quality, and—critically—energy consumption.
Key Takeaways
Links: https://github.com/Blueloop/E-Paper-driving-Waveforms https://matrix.to/#/!xlOgXcWcKOYkMyPsIg:matrix.org?via=matrix.org https://lcd-mikroelektronik.de/news/e-paper-waveforms/ https://lcd-mikroelektronik.de/kategorie/e-paper/
Draupnir is a unified platform to grow, manage, and sustain communities on Matrix. Over the last 3 years we have learned many lessons to share with the community on building trust and safety tooling in an open federation.
We will discuss just a few of the many problems we have faced, and our experience solving them
https://github.com/the-draupnir-project/Draupnir
Policy servers (MSC4284) are a new tool available to communities on Matrix to help reduce spam and other unwelcome content, but they aren't the only option. Communities have a whole suite of tools available to them to keep their users safe, such as moderation bots and in-client safety features.
In this talk, we'll cover the layers of Trust & Safety (T&S) tooling available to communities, how they work, and what harms they are typically best at mitigating. We'll also demonstrate how to set up a policy server in your community, and discuss what they might be able to do in the future.
As protocols and platforms grow, so do the demands of policy enforcement, human review workflows, and cross-platform incident response. Trust and safety tools form this critical layer of Internet infrastructure, yet most solutions remain closed, proprietary, and reinvented in isolation. Further, they’re typically out of reach for smaller and decentralized platforms.
Robust Open Online Safety Tools (ROOST) is building a different future: one where these trust and safety tools are open, transparent, community-governed, and usable by platforms and organizations of all sizes. In this talk, you’ll get a refresher on what “trust and safety” means; hear how ROOST is succeeding with a non-profit and open source approach; learn about the newly-released Osprey rules engine and investigation tool—already in production across platforms like Bluesky and Discord; see a demo of Osprey in action; and finally, learn how to adopt and contribute to Osprey and other open source trust and safety tools with ROOST.
An overview of all that's been happening with the Matrix protocol in the last year, including:
Project Hydra (state resolution improvements)
Trust & Safety improvements
Matrix 2.0 MSCs (OIDC, Simplified Sliding Sync, Matrix RTC and Invisible Crypto)
P2P Matrix progress
Encryption advances with MLS, post quantum
Updates on the scores of public sector Matrix deployments we're seeing emerge as countries seek digital sovereignty...
...and more!
Element Web is the oldest and most widely deployed Matrix client, and could well be the most widely deployed decentralised comms client in active service, especially when considering its many forks (Tchap, openDesk Chat, BundesMessenger, SchildiChat, LuxChat, etc.)
Over the last 11 years it has accumulated a very significant amount of technical debt, and we believe that one of the main ways to accelerate the uptake of decentralised communication would be to be radically improve the codebase. This means not doing a rewrite, and instead figuring out how to carefully switch the engine mid-flight from matrix-js-sdk to matrix-rust-sdk running in WASM, ensuring Element Web benefits from all the improvements which have landed in the Element X mobile apps, while simultaneously stopping reinventing the wheel between the two stacks. We'll demonstrate experiments with Aurora as our playground for running Element Web's react components on top of matrix-rust-sdk, and explain how we hope to bring decentralised comms to a wider audience by making Element Web as performant and snappy as Element X.
This talk should be of extreme interest to anyone who has ever complained about Element Web being slow or RAM hungry, and who wants to see a world where decentralised comms can outrun the centralised alternatives!
Discover how MatrixRTC transforms into a "backendless" multiplayer game server and join us for a live Godot game session inside a Matrix widget.
The VOIP team at Element will present their progress on abstracting an RTC SDK from the Element Call stack. We want to share the current state as we try to use it to build a multi-player game.
If you are familiar with Godot, you will learn how to potentially use Matrix as a free, encrypted backend that handles account creation and persistent storage.
At the end, there will be a gaming session with the devroom! Prepare to battle!
Element is the most widely deployed Matrix client, built by the team who created Matrix in order to bootstrap the ecosystem. The last few years have been quite a rollercoaster in terms of figuring out how to ensure Element can contribute to Matrix sustainably long-term - a problem faced by many open source projects whose core team works on the project as their day job.
The good news is we think we've now found a sustainable model that works, having moved from Apache to AGPL and having finally released an official Matrix distribution from Element in the form of Element Server Suite (ESS) Community under the AGPL. In this talk we'll give a super quick tour of the journey that we've been on and the learnings encountered along the way, in the hope that other decentralised comms projects can learn from our mistakes and successes. We'll look at the work Element's been doing to sustainably progress Matrix - be that driving forwards Matrix 2.0 spec work, maintaining Synapse, or ensuring that matrix-rust-sdk provides a foundational client SDK suitable for Element X, Fractal, iamb and more.
Finally, we'll take a quick look at how Element has ended up bringing decentralised communication to the heart of public sector open source collaboration suites such as Germany's openDesk from ZenDiS, France's La Suite from DINUM, and The Netherlands' MijnBureau from MinBZK - and take a look at what the future may bring!
Messaging Layer Security (MLS) is an IETF standard (RFC9420) for end-to-end encryption in messaging systems. However, it requires a delivery service that determines an ordering of handshake messages, which does not fit with certain messaging architectures. In this talk, we will explore some of the work that has been done to make MLS work in a distributed/decentralized environment, and look at some of the remaining issues.
Building open federated communication systems requires more than publishing specifications. It demands a living ecosystem of independent implementations that actually work together. The XMPP Standards Foundation (XSF) is a standards body, but is also the center of a development ecosystem that encompasses 5+ major servers and 20+ clients, all developed by different individuals and organizations, all highly interoperable and shipping new features at an accelerating pace.
This talk will share how all this can work at this scale and will be co-presented by a server developer and a client developer, showing how they work together to fine-tune their implementations.
We will first explain how the XSF works on its specifications, how its process has improved over the years, with proven engineering patterns that enable independent projects to build interoperable features without tight coupling (and without central coordination).
We will illustrate the talk by showing real-life collaboration examples that came to life in 2025, sharing the points of view of an ejabberd server developer and the Movim client developer.
As a conclusion, we will tease new features currently in design for 2026 and give you a glimpse at messaging federation, the XMPP way.
This talk is for people who are interested in contributing to a truly decentralized protocol design initiative or who would like to understand what they can expect from XMPP in the future, based on examples of what has been achieved in 2025.
What if you could have chat, video conferencing, blogging, and social communities all in one place without giving up your data to a centralized platform? Movim is a web-based application that brings the full power of XMPP to end users, combining instant messaging, group chats, video calls, and a complete publishing platform into a unified experience.
In this talk, I'll present how Movim leverages the XMPP standard and its extensions (Pubsub, MUC, Jingle) to deliver features users expect from modern social platforms while remaining fully federated, interoperable with other XMPP clients like Conversations and Dino, and capable of bridging to centralized platforms like Discord, Telegram, and WhatsApp!
I'll discuss the technical challenges of building a rich web frontend on top of XMPP, showcase the exciting features recently added to the project, and introduce the upcoming planned ones.
Whether you're an XMPP enthusiast or curious about decentralized alternatives to mainstream social media, come discover how Movim is bridging the gap between protocol power and user experience.
Official website: https://movim.eu/
Do you remember the "Now Playing" feature in MSN Messenger? It was a feature that make you able to see which song are your friends listening at the moment back in 2000s, but unfortunately it is mostly forgotten now.
In this talk, I will share the journey on my research on implementing this feature in modern XMPP clients, the protocols of certain operating systems to read the currently playing media, the current status of the support of XEP-0118[^1] and the PoC of a modern "Now Playing" feature.
[^1]: XEP-0118: User Tune
Bonfire is a next-generation, open-source platform for building trustful communities and federated networks. It reimagines social communication by allowing communities to enable, disable, or adapt features and even protocols, putting community governance, and autonomy combined with consentful interconnection at its core. Bonfire federates with ActivityPub, with bridging available to ATproto (and hopefully more to come). Bonfire’s federated groups, thread-centric discussions, and modular architecture make it easy to experiment with new forms of moderation, identity, and trust that reach beyond single servers, single platforms, or single protocols.
This talk will cover:
Our ongoing work and demo of fully end-to-end encrypted messaging (MLS-based) over ActivityPub, one the first two implementations of its kind
ActivityPub C2S API use: how apps can easily integrate with the fediverse (including MLS messaging) via Bonfire
Interoperability: extending ActivityPub for advanced user stories, moderation, as well as bridging with ATproto and potential future integrations with Matrix, XMPP, etc.
Consentful communication flows and privacy-preserving tools for trust and safety (such as circles and boundaries)
Bonfire’s modular architecture: designing “app flavours” with custom governance, moderation, and communication tools for different community needs
Attendees will see a live demo and leave with ideas and tools for composing their own modular, federated, and privacy-focused social communication spaces.
Links:
Links:
- Project
- Docs
- Code
- Interop & FEP/Protocol extensions
DASL (Data-Addressed Structures & Links, https://dasl.ing/) is a suite of small and simple specs that provide a proven, reliable, interoperable toolbox for content-addressing that can be used in other protocols. It has quality implementations in multiple languages, has multiple components used by the AT Protocol, and has some parts also documented in an IETF draft. For the most part, it is a subset of IPFS ruthlessly aimed at interoperability and ease of use. This talk offers a tour and introduction to the core concepts, and provides pointers for reuse in other protocols.
Decentralized Key Management / Self Sovereign Identity holds the promise of a truly decentralized, self-verifying PKI. Approaches like KERI, the Key Event Receipt Infrastructure, balance privacy, verifiability, and the protection from duplicity. But their promises have remained largely academic thus far. In 2026, the Swiss Healthcare System will be the first large-scale deployment of this kind of infrastructure, using it to upgrade the trust, security and privacy levels of its aging email infrastructure. The result will be a production ready technology stack that can be utilised for a large number of use cases around communication.
Georg Greve is centrally involved in that transition, and will share the road travelled so far, the current state, and the next steps for this transformation.
Background: https://www.hin.ch/de/blog/2025/vom-mailgateway-zum-data-mesh.cfm
Social graphs are a well-understood technology. Using infrastructure and standardized protocols that are usually de facto controlled by large, commercial platforms, they provide a way of structuring and querying data about individual nodes (often users) in a network and the relationships (edges) between these nodes. They are theoretically extensible, and social graph data can typically also be represented using open standards like RDF which can be published and consumed by other authorities participating in a network. However, trying to enable participation or federation this way is frequently wishful thinking, and does not really facilitate scaling that social graph beyond a particular API representation of rows in one organization’s database.
The Atmosphere — built on AT — presents a different approach. When you write data using Atmosphere APIs, such as by posting to Bluesky, that data is associated with your personal data repository. These personal data repositories can be hosted or migrated anywhere across the Atmosphere. Each Atmosphere app declares its own schema (Lexicon), and reads and writes its own set of fields. These fields can be read by any other app built on the Atmosphere, allowing users to both a) own and b) span their graphs across the network.
This enables several in-demand use cases. Building “big world” social apps with AT is only a matter of creating new lexicons to support additional data models, designing app views which serve this data (along with any other data that may already be available to a user’s graph from other AT apps), and self-hosting the necessary infrastructure.
We provide implementation patterns, along with primitives and tools that are of interest to almost all implementers — like OAuth Scopes and moderation tools. We also provide a social networking app (Bluesky Social) that serves as both a reference implementation for the protocol, and a critical-mass opportunity to populate users’ social graphs so that other application developers can benefit from shared data. Regardless of which application is using this data, all of it is open, public, and associated with individual users’ data repositories, which can be migrated across the network at will.
This talk will provide a demonstration of some fundamental AT technologies, including: "Sipping the Firehose" - working with the stream, a demo of creating records and have them pop right out “Getting backlinks with Constellation” - querying social interactions in real time, and building that data into different interfaces “Lexicon Authoring” - a discussion of best practices for creating additional schemas, with examples from other apps in the Atmosphere
I had a few talks at conferences, entitled "Disobay: FOSS tools to fight back," where I explained what tools exist for us to protect our communication and why we should use them. I covered several decentralized tools and protocols, and then I asked, "Are there any questions?" One person asked, "How do I convince my friends to move to those tools"? And the audience nodded in agreement.
Then I took this topic seriously. With this talk, I aim to cover the subject of their adoption - we all build great tools, but what approaches can we use to encourage people to join the right side? The majority of the cases I would showcase are from real people on my fediverse, Hacker News, and other networks I'm a part of.