build: switch ogpeek from tsc to tsdown

[minjun0219]

Summary

Switches packages/ogpeek's build tool from tsc to tsdown (Rolldown + oxc). The engine is small (one dependency) with two entry points (., ./fetch), so the transition cost is low and the speed gain is clear.

• Build time: ~800ms (down from the tsc baseline)
• Output identical: dist/{index,fetch}.{js,d.ts} plus sourcemaps — exports mapping unchanged
• npm tarball layout: identical (README + dist/* + package.json)

Changes

File	Change
packages/ogpeek/package.json	build: "pnpm run typecheck && tsdown", add tsdown ^0.21.10, drop rimraf
packages/ogpeek/tsdown.config.ts	New — 2 entries, ESM, dts/sourcemap on, fixedExtension: false
pnpm-lock.yaml	tsdown and transitive deps

tsdown.config.ts

export default defineConfig({
  entry: ["src/index.ts", "src/fetch.ts"],
  format: "esm",
  dts: true,
  sourcemap: true,
  target: "node20",
  clean: true,
  fixedExtension: false, // keep .js / .d.ts
});

htmlparser2 lives in dependencies, so tsdown keeps it external by default — no explicit external config needed (v0.21 deprecated external in favor of deps.neverBundle).

Trade-off

tsdown does not typecheck (oxc-based transpile). To preserve the prior safety where build failed on type errors, build now chains tsc --noEmit && tsdown. Type regressions still fail the build exactly as before; the only new surface is a separate typecheck script for callers that want the check without bundling.

Test plan

• pnpm -F ogpeek build — verify dist/ outputs (index.js, fetch.js, *.d.ts, *.js.map)
• pnpm -F ogpeek test — 33/33 pass
• pnpm -F ogpeek typecheck — pass
• pnpm -F website typecheck — pass (chains ogpeek build)
• dist/index.js does not bundle htmlparser2 (external preserved)
• dist/index.js has no Node-only leakage from fetch.ts (CLAUDE.md principle 1)
• npm pack --dry-run tarball layout matches the previous output
• CI pass

https://claude.ai/code/session_01Y9ikfab6CoTdXf9i64Fe61

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	ogpeek	e82cb50	Commit Preview URL Branch Preview URL	Apr 26 2026, 12:19 AM

[Copilot]

Pull request overview

packages/ogpeek의 빌드 파이프라인을 tsc 기반에서 tsdown(Rolldown + oxc) 기반으로 전환해, dist/{index,fetch}.{js,d.ts} 산출물을 유지하면서 빌드 시간을 단축하려는 PR입니다.

Changes:

• packages/ogpeek의 빌드 스크립트를 tsdown으로 변경하고 rimraf를 제거
• tsdown.config.ts를 추가해 entry 2개(index, fetch) / ESM / dts / sourcemap / clean 옵션을 설정
• pnpm-lock.yaml에 tsdown 및 하위 의존성을 반영

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
pnpm-lock.yaml	tsdown 도입에 따른 신규 의존성(rolldown, dts 플러그인 등) lock 반영 및 rimraf 제거
packages/ogpeek/tsdown.config.ts	ogpeek 번들링/타입 산출을 위한 tsdown 설정 파일 신설
packages/ogpeek/package.json	build를 tsdown으로 전환하고 devDependencies 갱신

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

Comments suppressed due to low confidence (1)

packages/ogpeek/package.json:55

• build no longer runs TypeScript typechecking (it just bundles). Any downstream scripts that relied on pnpm -F ogpeek build to fail on type errors (e.g. website's typecheck which calls ogpeek build) will stop catching ogpeek type regressions. Consider either (a) updating those callers to run ogpeek typecheck explicitly, or (b) making build run typecheck and introducing a separate bundle/build:fast script for tsdown-only bundling.

    "build": "tsdown",
    "prepack": "pnpm run build",
    "test": "vitest run",
    "test:watch": "vitest",
    "typecheck": "tsc --noEmit"

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[Copilot]

prepack currently runs only build, but build no longer typechecks. That means pnpm pack/pnpm publish could produce tarballs even when there are TypeScript errors. Suggest including typecheck in prepack (or adding a dedicated prepack/release script that runs typecheck + tests + build).

Suggested change

	"prepack": "pnpm run build",
	"prepack": "pnpm run typecheck && pnpm run test && pnpm run build",