[wrangler] Preserve tree-shaking across workspace package boundaries

[james-elicx]

Fixes no linked issue.

Wrangler currently bundles several workspace packages after they have already been bundled, which prevents effective tree-shaking. Miniflare similarly imports the broad workers-utils entry point for a small set of helpers.

This change aliases selected workspace packages to source during the Wrangler monorepo build, and adds granular workers-utils leaf exports used by Miniflare and its transitive CLI/container helpers. Published dependency installation remains unchanged.

Bundle measurements

Measurements use equivalent source-map-disabled builds.

Package	Size	Before	After	Saving
Wrangler	Raw	20,552,867 B	14,089,515 B	6,463,352 B / 31.4%
	Gzip	3,609,518 B	2,518,952 B	1,090,566 B / 30.2%
Miniflare	Raw	4,843,954 B	3,732,681 B	1,111,273 B / 22.9%
	Gzip	1,034,164 B	844,666 B	189,498 B / 18.3%
Total	Raw	25,396,821 B	17,822,196 B	7,574,625 B / 29.8%
	Gzip	4,643,682 B	3,363,618 B	1,280,064 B / 27.6%

The workers-utils contribution to Miniflare falls from 1,023,602 B to 19,327 B.

Validation

• Wrangler full suite: 5,070 passed, 3 skipped, 9 todo
• workers-utils: 950 passed
• cli-shared-helpers: 42 passed, 1 skipped
• containers-shared: 71 passed
• Focused changed Miniflare tests: 18 passed
• All affected package type checks and workers-utils type tests passed
• Targeted formatting and lint checks passed
• Filtered builds and built Wrangler/Miniflare API smoke checks passed
• Miniflare full suite: 84 of 85 files and 1,197 tests passed; the remaining Hyperdrive proxy test is blocked by the host OpenSSL rejecting its test CA with ERR_SSL_CA_MD_TOO_WEAK, unrelated to this change

---

• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: this is an internal build and import refactor with no user-facing behavior or API change.

Note

This is a contribution from an AI agent: Codex.

[changeset-bot]

🦋 Changeset detected

Latest commit: dc60d45

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

This PR includes changesets to release 12 packages

Name	Type
@cloudflare/workers-utils	Patch
miniflare	Patch
wrangler	Patch
@cloudflare/autoconfig	Patch
@cloudflare/cli-shared-helpers	Patch
@cloudflare/deploy-helpers	Patch
@cloudflare/remote-bindings	Patch
@cloudflare/runtime-types	Patch
@cloudflare/vite-plugin	Patch
@cloudflare/vitest-plugin	Patch
@cloudflare/workers-auth	Patch
@cloudflare/pages-shared	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

[ask-bonk]

LGTM!

github run

[pkg-pr-new]

@cloudflare/autoconfig

npm i https://pkg.pr.new/@cloudflare/autoconfig@15406

@cloudflare/build-output-utils

npm i https://pkg.pr.new/@cloudflare/build-output-utils@15406

@cloudflare/codemods

npm i https://pkg.pr.new/@cloudflare/codemods@15406

@cloudflare/config

npm i https://pkg.pr.new/@cloudflare/config@15406

create-cloudflare

npm i https://pkg.pr.new/create-cloudflare@15406

@cloudflare/deploy-helpers

npm i https://pkg.pr.new/@cloudflare/deploy-helpers@15406

@cloudflare/kv-asset-handler

npm i https://pkg.pr.new/@cloudflare/kv-asset-handler@15406

miniflare

npm i https://pkg.pr.new/miniflare@15406

@cloudflare/pages-functions

npm i https://pkg.pr.new/@cloudflare/pages-functions@15406

@cloudflare/pages-shared

npm i https://pkg.pr.new/@cloudflare/pages-shared@15406

@cloudflare/unenv-preset

npm i https://pkg.pr.new/@cloudflare/unenv-preset@15406

@cloudflare/vite-plugin

npm i https://pkg.pr.new/@cloudflare/vite-plugin@15406

@cloudflare/vitest-plugin

npm i https://pkg.pr.new/@cloudflare/vitest-plugin@15406

@cloudflare/workers-auth

npm i https://pkg.pr.new/@cloudflare/workers-auth@15406

@cloudflare/workers-editor-shared

npm i https://pkg.pr.new/@cloudflare/workers-editor-shared@15406

@cloudflare/workers-utils

npm i https://pkg.pr.new/@cloudflare/workers-utils@15406

wrangler

npm i https://pkg.pr.new/wrangler@15406

commit: dc60d45

[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/cloudchamber
• ✅ @cloudflare/wrangler

Show detailed file reviewers

• packages/containers-shared/src/build.ts: [@cloudflare/cloudchamber]
• packages/containers-shared/src/images.ts: [@cloudflare/cloudchamber]
• packages/containers-shared/src/inspect.ts: [@cloudflare/cloudchamber]
• packages/containers-shared/src/knobs.ts: [@cloudflare/cloudchamber]
• packages/containers-shared/src/login.ts: [@cloudflare/cloudchamber]
• packages/containers-shared/src/registry.ts: [@cloudflare/cloudchamber]
• packages/containers-shared/src/utils.ts: [@cloudflare/cloudchamber]

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[NuroDev]

Codeowners Bypass

[workers-devprod]

Codeowners reviews satisfied