From Users to (Sense)Makers: On the Pivotal Role of Stigmergic Social Annotation in the Quest for Collective Sensemaking | Ronen Tamari

From Users to (Sense)Makers: On the Pivotal Role of Stigmergic Social Annotation in the Quest for Collective Sensemaking

The web has become a dominant epistemic environment, influencing people's beliefs at a global scale. However, online epistemic environments are increasingly polluted, impairing societies' ability to coordinate effectively in the face of global crises. We argue that centralized platforms are a main source of epistemic pollution, and that healthier environments require redesigning how we collectively govern attention. Inspired by decentralization and open source software movements, we propose Open Source Attention, a socio-technical framework for "freeing" human attention from control by platforms, through a decentralized eco-system for creating, storing and querying stigmergic markers; the digital traces of human attention.

Holding Platforms Accountable Is Not Enough. We Need A ‘Compass’ For Social Technologies

This is the first series in the 21-22 Perspectives on Public Purpose blog.

FediForum | Growing the Open Social Web:<br>An Online Un-Workshop

Since the Twitter takeover by Elon Musk over three years ago, the Open Social Web has been adopted by an enthusiastic community. People world-wide are building and using open social platforms and open social protocols to better interact with others online.

Beyond Community Notes: A Framework for Understanding and Building Crowdsourced Context Systems for Social Media

Social media platforms are increasingly adopting features that display crowdsourced context alongside posts, a technique pioneered by X's Community Notes. These systems -- which we term Crowdsourced Context Systems (CCS) -- have the potential to reshape the information ecosystem as major platforms embrace them as alternatives to professional fact-checking. To understand the features and implications of these systems, we conduct a systematic literature review of existing CCS research (n=56) and analyze real-world CCS implementations. Based on our analysis, we develop a framework with two components. First, we present a theoretical model to conceptualize and define CCS. Second, we identify a design space encompassing six aspects: participation, inputs, curation, presentation, platform treatment, and transparency. We also surface normative implications of different CCS design and implementation choices. Our work integrates theoretical, design, and ethical perspectives to establish a foundation for future human-centered research on Crowdsourced Context Systems.

Reclaiming Social Spaces: Are Open Source Platforms a Path for More Human Connection?

What if social media platforms were built to serve their communities, not billionaires? Join us with the founders of Blacksky as we explore the potential of open source social media.

Seeing the Politics of Decentralized Social Media Protocols

Calls to decentralize feed-based social media have been driven by concerns about the concentrated power of centralized platforms and their societal impact. In response, numerous decentralized social media protocols have emerged, each interpreting “decentralization” in a different way. We analyze four such protocols (ActivityPub, AT Protocol, Nostr, and Farcaster) drawing on protocol documentation, media coverage, direct usage, and semi-structured interviews with protocol developers and experts to situate each protocol within its socio-technical goals. To support this analysis, we develop a grounded lexicon that facilitates the description and comparison of analogous components across each protocol. With it, we show how each protocol distributes control over key components differently, shaping who holds power over critical aspects such as user identity, curation, and infrastructural ownership. By examining protocols as socio-technical artifacts, we show how they prioritize different values and make distinct trade-offs, providing CSCW researchers with a lens to more effectively evaluate and design future decentralized social media systems.

FediForum | Growing the Open Social Web un-workshop, 2026/03/02

Fractured reality

The report examines the evolving impact of digital technologies on European democracy. In an era of a global struggle to control the information space, this report offers critical insights into the fracturing of perceived realities, the rise of the ‘fantasy-industrial complex’, and the systemic risks posed by the attention economy. It exposes how platforms algorithmically prioritise engagement over accuracy, reinforcing ideological echo chambers and amplifying mis- and disinformation that erode democratic resilience. The report highlights how structural incentives and foreign control of the most important players in the information space undermine information integrity, collective knowledge and civic discourse. In response, the report presents a number of recommendations from fostering alternative public spaces and crowd-sourced knowledge systems to reforming business models, restoring user agency, and advancing EU digital sovereignty through decentralised infrastructure

Sustainable Open Source: The Maintainers Perspective or: How I Learned to Stop Caring and Love Open Source

Open Social Network Cookbook

The Open Social Network Cookbook is the collective product of the Open Social Incubator, a cohort that MEDLab hosted from Fall 2024 to Spring 2025. At the heart of our work together was the question: How can the online communities that we participate in use tools that truly reflect our values?