Consolidate Tooling Configuration for Vite+ Migration

Problem Description

The Prism analytics platform team has been running a TypeScript frontend library for two years. Over that time, configuration has accumulated organically: a separate Vitest config, a standalone oxlint config, tsdown for packaging, and Husky for pre-commit hooks. The project was recently updated to Vite 8 and Vitest 4.1, making it eligible for Vite+ adoption.

The team's tech lead wants to migrate to Vite+ and consolidate everything into its unified config format. She's especially keen on enabling proper type-aware linting across the codebase — the project has had latent type errors slip through because the existing oxlint setup doesn't perform type-aware checks. However, a previous spike by a colleague enabled the lint options in a test branch and found that type-aware checks silently weren't running, even with the options turned on. The colleague suspected it might be related to a tsconfig setting but didn't track down the root cause before moving on.

Your task is to perform the migration: consolidate all configuration into vite.config.ts, enable the team's desired type-aware checking correctly, and replace the Husky hook setup with the Vite+ equivalent. Produce the migrated config files and a brief MIGRATION.md explaining what changed and the recommended migration procedure for future reference.

Output Specification

Produce the following files:

• vite.config.ts — the consolidated Vite+ config incorporating lint, test, pack, and staged-hook configuration
• tsconfig.json — updated TypeScript config (address any settings incompatible with Vite+ features you discover)
• package.json — updated with corrected scripts and dependencies reflecting the new toolchain
• MIGRATION.md — brief notes on what was consolidated, what the recommended migration entry point is, and any gotchas the team should know about (especially around type-aware checking)

Organize the output so that any configuration files no longer needed under Vite+ conventions are absent from your output — the team will delete them from the repo based on what you produce.

Input Files

The following files are provided as inputs. Extract them before beginning.

=============== FILE: package.json =============== { "name": "@prism/analytics-core", "version": "1.4.2", "type": "module", "exports": { ".": { "import": "./dist/index.mjs", "require": "./dist/index.cjs", "types": "./dist/index.d.ts" } }, "files": ["dist"], "scripts": { "build": "tsdown", "dev": "tsdown --watch", "test": "vitest run --coverage", "test:watch": "vitest", "lint": "oxlint src/", "check": "tsc --noEmit && oxlint src/", "prepare": "husky install" }, "devDependencies": { "vite": "^8.0.0", "vitest": "^4.1.0", "tsdown": "^0.12.0", "oxlint": "^0.4.0", "@vitest/coverage-v8": "^4.1.0", "husky": "^9.0.0", "lint-staged": "^15.0.0", "typescript": "^5.4.0" } }

=============== FILE: vitest.config.ts =============== import { defineConfig } from 'vitest/config'

export default defineConfig({ test: { include: ['src//*.test.ts'], environment: 'node', coverage: { provider: 'v8', reporter: ['text', 'lcov', 'html'], include: ['src//.ts'], exclude: ['src/**/.test.ts'], }, }, })

=============== FILE: .oxlintrc.json =============== { "rules": { "no-unused-vars": "error", "no-console": "warn", "eqeqeq": "error", "no-implicit-coercion": "warn" }, "ignorePatterns": ["dist/", "node_modules/"] }

=============== FILE: tsdown.config.ts =============== import { defineConfig } from 'tsdown'

export default defineConfig({ entry: ['src/index.ts'], format: ['esm', 'cjs'], dts: true, clean: true, sourcemap: true, treeshake: true, outDir: 'dist', })

=============== FILE: tsconfig.json =============== { "compilerOptions": { "target": "ES2022", "module": "ESNext", "moduleResolution": "bundler", "lib": ["ES2022"], "strict": true, "declaration": true, "declarationMap": true, "sourceMap": true, "outDir": "dist", "baseUrl": ".", "paths": { "@prism/": ["./src/"] }, "skipLibCheck": true }, "include": ["src"], "exclude": ["node_modules", "dist"] }

=============== FILE: vite.config.ts =============== import { defineConfig } from 'vite'

export default defineConfig({ build: { lib: { entry: 'src/index.ts', formats: ['es', 'cjs'], }, }, })

=============== FILE: .husky/pre-commit =============== #!/usr/bin/env sh . "$(dirname -- "$0")/_/husky.sh"

npx lint-staged