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DeepSeek Harness Plugins: What You Can Actually Swap, and What You Cannot
The runtime declares 69 services and marks only 29 of them swappable. Here is the map, with working patch files for the model route, a remote sandbox, compaction, Claude Code and Codex subagents, and an agent preset of your own.
15 min · by the editors→
What Is Claude Fable 5.1? A Beginner's Guide to Anthropic's New Agent Model
Learn what Claude Fable 5.1 and Mythos 5.1 are, what they cost, how Fable 5.1 compares to Opus 5, how to switch in Claude Code and the API, and the three breaking changes to fix before you migrate.
· 14 min · by the editors
When an AI Model Crosses a Cyber-Critical Threshold, Agent Builders Need a New Security Baseline
OpenAI says its upcoming Astra models may have critical cyber capability. Here is what the pause in frontier training means for teams giving AI agents code execution, tools, and internet access.
· 9 min · by the editors
What Is DeepSeek Harness? A Beginner's Guide to the MIT-Licensed Agent Runtime
Learn what DeepSeek Harness is, how to run it on Windows, macOS, or Linux, what "everything is a plugin" changes in practice, how to read its session event log, and how it compares to Claude Code.
· 16 min · by the editorsA practical resource library, curated with care.
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