Swift VSX Support, Biome Type Inference, Agent Guardrails

This week's tooling news clusters around a recurring theme: removing dependencies that were never really necessary. Biome ditches the TypeScript compiler for type-aware linting. Swift developers stop caring which editor they're in. And the most interesting finding of the week is that a 1990s text-retrieval algorithm outperforms GPT-4 at catching lying agents. Here's what's worth your attention. Swift Extension Lands on Open VSX Registry The official Swift extension is now published to the Open VSX Registry, which means Cursor, VSCodium, AWS Kiro, and any other LSP-compatible editor that doesn't use the proprietary VS Code Marketplace can now auto-install it without you doing anything. Code completion, debugging, and the test explorer just work. This matters because the Swift toolchain has always been Xcode-or-fight. Any serious cross-platform Swift work meant manually tracking down extensions, pinning versions, and hoping nothing broke when someone cloned the repo on a different machine. Agentic IDEs that provision their own extensions automatically—like Cursor and Kiro—now get Swift support without intervention. Verdict: Ship. If you're already in an Open VSX-compatible editor, there's nothing to configure. Zero blocking concerns; this is a pure reduction in setup friction. Biome v2 Adds Type Inference Without TypeScript Biome v2 ships its own type inference engine, decoupling type-aware linting rules from the TypeScript compiler entirely. The headline number is 75% detection parity on floating promise rules compared to typescript-eslint—lower recall, but at meaningfully lower install weight and CI overhead. Multi-file analysis also lands in v2, unlocking rules that require cross-module context that were structurally impossible in v1. The real value proposition isn't feature parity—it's dependency elimination. Pulling TypeScript out of your lint pipeline reduces cold-start times in CI and removes a whole class of version-mismatch bugs between typescript , @typescri