Ultracite v8 puts linting inside agent loops

The important shift is conceptual: linting moves from a CI gate to an always-on feedback loop around autonomous edits. That is a stronger answer to agent-generated code than another prompt file, though clean linting still cannot validate behavior.

• –AGENTS.md gives dozens of coding agents one shared standard, reducing instruction drift across tools.
• –Post-edit hooks check only changed files and return unresolved diagnostics to the agent.
• –Oxlint, Biome, and ESLint support preserves migration flexibility instead of forcing one engine.
• –Type-aware Oxlint integration catches issues that syntax-only linting misses.
• –Node.js 22.18+ and engine-specific configuration changes make upgrading existing projects nontrivial.