refactor(build): remove vite-plugin-commonjs

[james-elicx]

Summary

• replace the application and next.config CommonJS wiring with the shared in-house transformer from the parent PR
• preserve require export-condition resolution, static and patterned require behavior, aliases, bare packages, extensionless/index resolution, asset extensions, HMR watch inputs, and default-first interop
• remove vite-plugin-commonjs and its vite-plugin-dynamic-import dependency closure
• execute extensionless patterned requires across Node dev/prod, Cloudflare dev, bundled Workers, Pages-only Workers, and Nitro
• port valuable upstream vite-plugin-commonjs and vite-plugin-dynamic-import cases as behavior-focused runtime/resolution tests

Stack

• Parent: refactor(build): add in-house CommonJS transform #2980
• This PR intentionally targets codex/internal-commonjs-core and should be reviewed after the parent.

Validation

• vp test run tests/commonjs-transform.test.ts tests/require-condition-resolution.test.ts tests/cjs.test.ts tests/cjs-globals-runtime.test.ts tests/import-meta-url.test.ts (133 passed)
• vp test run tests/next-config-extensions.test.ts tests/next-config-runtime-shapes.test.ts tests/next-config.test.ts tests/init-cjs-config-resolve.test.ts (241 passed)
• PLAYWRIGHT_PROJECT=pages-router-prod CI=1 pnpm run test:e2e -- tests/e2e/pages-router-prod/production.spec.ts -g patterned-dynamic-require (21 passed; full project selected by Playwright)
• vp check
• vp run vinext#build
• pnpm install --offline --frozen-lockfile --ignore-scripts
• dependency/source/dist searches and pnpm why show no remaining vite-plugin-commonjs or vite-plugin-dynamic-import closure

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@vinext/cloudflare@2981

npm i https://pkg.pr.new/create-vinext-app@2981

npm i https://pkg.pr.new/@vinext/types@2981

npm i https://pkg.pr.new/vinext@2981

commit: c23b082

[github-actions]

Example	Preview	Production	Original
app-router-cloudflare	preview	production
pages-router-cloudflare	preview	production
app-router-playground	preview	production	original
realworld-api-rest	preview	production
nextra-docs-template	preview	production
benchmarks	preview	production
hackernews	preview	production	original
workers-cache	preview	production
web	preview	production

[github-actions]

Performance benchmarks

Compared c23b082 against base 3267dfd using alternating same-runner rounds. Next.js was unchanged and skipped.

1 improved · 0 regressed · 5 within ±1.5%

Scenario	Framework	Baseline	Current	Change
Client bundle size (gzip)	vinext	140.3 KB	140.3 KB	⚫ +0.0%
Client entry size (gzip)	vinext	127.7 KB	127.7 KB	⚫ +0.0%
Dev server cold start	vinext	3.08 s	2.99 s	🟢 -2.9%
Production build time	vinext	3.38 s	3.40 s	⚫ +0.6%
RSC entry closure size (gzip)	vinext	115.2 KB	115.2 KB	⚫ +0.0%
Server bundle size (gzip)	vinext	196.3 KB	196.4 KB	⚫ +0.0%

View detailed results and traces

_{🟢 improvement · 🔴 regression · ⚫ change below 1.5% · paired base/head}

[james-elicx]

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[james-elicx]

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