arch-upkeep is a meta architecture skill for keeping existing projects aligned with the canonical starter stacks: - — pnpm monorepo for TS libs with tsdown per package - — single-package TS library with tsdown - — CLI apps built on tsdown - — libraries built as unplugin (Vite/Rollup/Webpack/ESBuild) - — browser extensions using Vue - — VS Code extensions Use this skill when a project already exists and you want to: - Identify what architecture it currently matches (lib / CLI / monorepo / webext / vscode / unplugin / mixed) - Plan a migration to one of the canonical starters - Incrementally up…