perf(build): minify bundle and compiled binary

[rafa-thayto]

Summary

• Adds --minify to all bun build invocations: the cli.js bundle, the local --compile binary, and the cross-platform release build in scripts/build.ts.
• Reduces the shipped clerk binary by ~1 MB on every target (63.38 MB → 62.39 MB on darwin-arm64 measured locally).
• Reduces the bundled cli.js artifact by ~41% (2.37 MB → 1.40 MB).
• No behavior change. --define-injected values (CLI_VERSION, CLI_ENV_PROFILES) are unaffected because Bun substitutes defines before minification.

Why minify only

Reduction beyond --minify requires changing the deploy model (the embedded Bun runtime is ~60 MB of the binary and is fixed). I evaluated and rejected:

• --target=bun (the default) — grew the bundle: 1.40 MB → 1.63 MB.
• --sourcemap=none on --compile — grew the binary by 1.85 MB (Bun quirk; default behavior is smaller).
• --bytecode — fails on cli.ts's top-level await import() for the completion fast path; bytecode also typically increases output size.
• Switching @inquirer/prompts to per-package imports — tree-shaking already eliminates unused prompts (verified: 360 KB used vs 420 KB if import * as).

Test plan

• bun run build produces cli.js of 1,400,498 B (down from 2,372,203 B)
• bun run build:compile produces dist/clerk of 62,388,832 B (down from 63,379,552 B)
• bun run scripts/build.ts --target darwin-arm64 --version 0.0.0-test succeeds and the binary reports the injected version
• bun run typecheck passes
• bun run lint passes
• bun run format:check passes
• bun run test — all 82 unit + integration tests pass
• Manual smoke on the minified compiled binary: --version, --help, apps --help, init --help, completion bash all behave correctly
• CI runs bun changeset status --since=origin/main (verified locally with staged changeset: exits 0, "clerk: patch")
• CI runs bun run test:e2e against the source (not the compiled binary), so minify is not exercised but also not broken

[changeset-bot]

🦋 Changeset detected

Latest commit: 6ac3b1b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
clerk	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[coderabbitai]

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

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Run ID: 3a912fe6-9166-4523-8a97-7aca3f7f53a6

📥 Commits

Reviewing files that changed from the base of the PR and between 44524c0 and 6ac3b1b.

📒 Files selected for processing (3)

• .changeset/bundle-size.md
• packages/cli-core/package.json
• scripts/build.ts

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📝 Walkthrough

Walkthrough

This change enables build minification across the CLI build pipeline. A changeset metadata file documents the patch release for the clerk package. The build and build:compile scripts in packages/cli-core/package.json add the --minify flag to Bun build invocations. The main build script in scripts/build.ts adds --minify to the Bun compile command for selected targets. These modifications reduce the output bundle sizes without altering functionality.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'perf(build): minify bundle and compiled binary' directly and accurately summarizes the main change—adding minification to build processes for bundle and binary reduction.
Description check	✅ Passed	The description is comprehensive and directly related to the changeset, covering the modifications made, their impact, evaluation of alternatives, and detailed test results.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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