The Stack
RL Frameworks for Training AI Agents: SkyRL, Agent Lightning, RLinf, AgentGym-RL
Everyone ships the same PPO. This year's agent-RL frameworks all fight over the one thing that's actually hard — the rollout.
The Stack
Everyone ships the same PPO. This year's agent-RL frameworks all fight over the one thing that's actually hard — the rollout.
🎧 Listen
The Stack
Nine repositories tackling the hardest unsolved problem in agent design — remembering, retrieving, and forgetting across the lifetime of a conversation.
🎧 Listen
The Stack
A field guide to the Model Context Protocol repositories that actually matter — the SDKs, the reference servers, and the connectors that earn a place in your config.
🎧 Listen
The Stack
The dozen codebases that quietly define what it means to be an agent in 2026 — frameworks, orchestration layers, and the tools that turn intent into action.
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