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CROSS-CATEGORY: The Guardrail Layer Around Coding Agents Shipped at Four Different Points in the Lifecycle in 48 Hours
SkillPreflight scores agent skills before install on a 100-point security, token and maintainability scale; Kern sandboxes execution in a 1.52 MB rootless binary; Unlose snapshots the filesystem via Windows VSS before an agent runs; and Agnost AI reads production conversations after the fact for silent failures and drift. Three of the four are free or open source and only Agnost AI, which is Y Combinator backed, is priced. The category is forming faster than anyone has figured out how to charge for it, which usually means the eventual winner is whoever already owns the runtime.
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