71 candidates reviewed. 7 made the cut.
Top Signal
OpenFang — Open-Source Agent Operating System
4,761 stars and 510 forks on a project that calls itself an "Agent Operating System." That's not a framework for building agents — it's infrastructure for running them. The distinction matters: most agent tooling today assumes you're building a single-purpose assistant. OpenFang is betting the next layer of the stack is an OS-level abstraction for orchestrating agents the way a kernel orchestrates processes.
It's cross-sourced on Hacker News, which means the infra crowd is paying attention, not just AI Twitter. That's a better signal.
Too early to call this production-ready, but if you're thinking about multi-agent infrastructure beyond LangChain/CrewAI-style orchestration, this is worth an afternoon. The framing alone is useful for thinking about what "agent infrastructure" actually needs to be.
Radar
Multi-agent GPU experiments (nanochat) — A researcher running 8 parallel agents (4 Claude, 4 Codex) with 1 GPU each, attempting to ablate softcap from a model without regression. Didn't work — but the setup is the story. Coordinating heterogeneous agent swarms across providers for research workloads is real and happening now.
Verdict: Watch. → https://x.com/i/web/status/2027521323275325622
Cursor: Tab → Agent ratio — Chart showing how Cursor's usage mix has shifted from tab-complete to agent requests over time. Progression: None → Tab → Agent → Parallel agents → Agent networks. If you're still treating autocomplete as the end state, this is a calibration moment.
Verdict: Watch. → https://x.com/i/web/status/2027501331125239822
kibitz — Real-time decoded feed of AI agent actions. Monitor multiple Claude Code and Codex sessions simultaneously, see exactly what each agent is doing, coordinate swarms. 293 stars, 2 days old. Missing observability layer for parallel coding agents.
Verdict: Evaluate now. → https://github.com/kibitzsh/kibitz
AgentMail (YC S25) — Email inbox API for agents. Not AI for your email — email for your AI. Async, multithreaded, identity built in, works with any email-native workflow. 169 HN points, 169 comments. Email is underrated as an agent interface: handles long-running tasks, file attachments, and human-in-the-loop naturally.
Verdict: Evaluate now. → https://agentmail.to
Deep Cut
Dario's PMF definition — 1,900 likes on a quote calling Dario Amodei's framing of product-market fit better than Andreessen's classic. No tool here, but useful: the people building the most capable AI are now doing the clearest thinking about what "it's working" looks like for AI products. Worth reading if you're trying to distinguish PMF from impressive demos.
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