feat(treeshake): add treeshake server + frontend and optimize build/upload path by ScriptedAlchemy · Pull Request #4372 · module-federation/core

ScriptedAlchemy · 2026-02-03T21:41:05Z

Adds the new treeshake build service + UI packages and hardens the server-side build/upload path.

What’s in this PR

New packages:
- @module-federation/treeshake-server: adapter-driven build service (Hono) that builds shared artifacts and serves an embedded UI.
- @module-federation/treeshake-frontend: UI to compare full vs treeshaken outputs.
Server improvements (treeshake-server):
- More robust config normalization / cache keying (includes hostName).
- Build pipeline + API route performance improvements (reduce response time; background cleanup; concurrency limiting).
- Upload path improvements (cache store + optional project publisher; better metadata hydration via .json).
Repo plumbing:
- Adds the new packages to Changesets ignored packages list.
- pnpm store configuration (.npmrc + .gitignore) and prettier ignore for the server template folder.

How to try

Run the server locally:
- pnpm --filter @module-federation/treeshake-server dev
- UI: http://localhost:3000/tree-shaking
- API: http://localhost:3000/tree-shaking-shared

Notes

This branch was merged with latest main and pnpm-lock.yaml was regenerated from main’s version.

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packages/treeshake-server/src/server.ts

…service

changeset-bot · 2026-02-03T21:46:58Z

🦋 Changeset detected

Latest commit: b3e46b7

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

This PR includes changesets to release 43 packages

Name	Type
@module-federation/treeshake-server	Patch
@module-federation/treeshake-frontend	Patch
@module-federation/runtime	Patch
@module-federation/enhanced	Patch
@module-federation/rspack	Patch
@module-federation/webpack-bundler-runtime	Patch
@module-federation/sdk	Patch
@module-federation/runtime-tools	Patch
@module-federation/managers	Patch
@module-federation/manifest	Patch
@module-federation/dts-plugin	Patch
@module-federation/third-party-dts-extractor	Patch
@module-federation/devtools	Patch
@module-federation/bridge-react	Patch
@module-federation/bridge-vue3	Patch
@module-federation/bridge-shared	Patch
@module-federation/bridge-react-webpack-plugin	Patch
@module-federation/modern-js-v3	Patch
@module-federation/retry-plugin	Patch
@module-federation/data-prefetch	Patch
@module-federation/rsbuild-plugin	Patch
@module-federation/error-codes	Patch
@module-federation/inject-external-runtime-core-plugin	Patch
@module-federation/runtime-core	Patch
create-module-federation	Patch
@module-federation/cli	Patch
@module-federation/rspress-plugin	Patch
@module-federation/metro	Patch
@module-federation/metro-plugin-rnef	Patch
@module-federation/metro-plugin-rnc-cli	Patch
@module-federation/modern-js	Patch
@module-federation/nextjs-mf	Patch
@module-federation/node	Patch
@module-federation/storybook-addon	Patch
shared-tree-shaking-no-server-host	Patch
shared-tree-shaking-no-server-provider	Patch
@module-federation/esbuild	Patch
@module-federation/utilities	Patch
remote5	Patch
remote6	Patch
shared-tree-shaking-with-server-host	Patch
shared-tree-shaking-with-server-provider	Patch
website-new	Patch

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chatgpt-codex-connector · 2026-02-03T21:47:32Z

packages/treeshake-server/src/services/uploadService.ts

+        uploaded.push({
+          name: s.name,
+          version: s.version,
+          globalName: s.globalName,
+          cdnUrl,


Preserve tree-shaking metadata in project publish responses

When uploadOptions is provided, the server uses uploadProject() and builds the response from sharedFilePaths. This push only copies name/version/globalName/cdnUrl, so modules and canTreeShaking are dropped even though they exist on SharedFilePath. The frontend expects canTreeShaking to be present (it treats missing as false) and uses modules for the export list; with uploadOptions enabled this causes /build/check-tree-shaking to incorrectly report “not tree-shakeable” and hides module data. Consider carrying these fields through (or hydrating from the JSON sidecar) when publishing.

Useful? React with 👍 / 👎.

This reverts commit bbd2028.

github-actions · 2026-02-05T00:50:04Z

Bundle Size Report

3 package(s) changed, 35 unchanged.

Package	Total dist	Delta	ESM gzip	Delta
`treeshake-server`	816.7 kB	+816.7 kB (+∞%)	8.0 kB	+8.0 kB (+∞%)
`treeshake-frontend`	634.2 kB	+634.2 kB (+∞%)	0 B	no change
`assemble-release-plan`	50.4 kB	-366 B (-0.7%)	6.6 kB	-9 B (-0.1%)

Total dist: 6.37 MB (+1.42 MB (+28.6%))
Total ESM gzip: 162.6 kB (+8.0 kB (+5.1%))

This reverts commit 2f25160.

The isolate: false setting was causing global state pollution between tests. The original rstest worker exit issue is fixed by passing pruneIntervalMs: 0 to createApp in frontend.adapter.test.ts. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

# Conflicts: # pnpm-lock.yaml

raven-actions/actionlint@v2 runs npm install internally which fails on pnpm workspace repos due to workspace:* protocol. Switch to direct binary download which has no npm dependency. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Co-authored-by: Cursor <cursoragent@cursor.com>

…ke-packages Co-authored-by: Cursor <cursoragent@cursor.com>

Run actionlint from the runner temp directory with NODE_PATH to avoid npm workspace protocol errors. Co-authored-by: Cursor <cursoragent@cursor.com>

Preserve tree-shaking metadata in project uploads and avoid logging values derived from environment variables. Co-authored-by: Cursor <cursoragent@cursor.com>

…e into treeshake-packages

Run treeshake server/frontend e2e tests in a separate CI job and wire it into the matrix. Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/e2e-treeshake.yml

Include treeshake server and frontend e2e runs in the local CI script with the affected check. Co-authored-by: Cursor <cursoragent@cursor.com>

Define explicit read-only token permissions for the treeshake E2E workflow. Co-authored-by: Cursor <cursoragent@cursor.com>

github-actions bot added the change: perf label Feb 3, 2026

github-advanced-security bot found potential problems Feb 3, 2026

View reviewed changes

packages/treeshake-server/src/server.ts Fixed Show fixed Hide fixed

packages/treeshake-server/src/server.ts Fixed Show fixed Hide fixed

ScriptedAlchemy and others added 6 commits February 3, 2026 13:46

feat: add treeshake server and frontend packages

3f21495

fix: cache key should consider hostName

8374e56

chore: fixed tree shaking server and app

a6bcd0d

chore: set publishConfig

91951e0

refactor(treeshake-server): fix spacing and path resolution in build …

2b151df

…service

perf: optimize api response time

1d872cf

ScriptedAlchemy force-pushed the treeshake-packages branch from 0a04b3e to 1d872cf Compare February 3, 2026 21:46

chatgpt-codex-connector bot reviewed Feb 3, 2026

View reviewed changes

chore: merge main into treeshake-packages

90cfef2

ScriptedAlchemy changed the title ~~perf(treeshake-server): optimize API response time~~ feat(treeshake): add treeshake server + frontend and optimize build/upload path Feb 3, 2026

github-actions bot added change: feat and removed change: perf labels Feb 3, 2026

ScriptedAlchemy and others added 9 commits February 3, 2026 14:48

fix(treeshake-server): avoid pnpm bin ENOENT before build

aeb6114

chore: add repository info

b381a78

fix(metro): split export types for publint

bbd2028

Merge branch 'main' into treeshake-packages

450b83e

Revert "fix(metro): split export types for publint"

166f08b

This reverts commit bbd2028.

Merge branch 'main' into treeshake-packages

7aca598

ci: install playwright and cache tools

2cf8055

ci: install playwright via treeshake-frontend

f5d6b34

ci: standardize playwright install

e6c45e2

ScriptedAlchemy added 4 commits February 4, 2026 16:59

chore: fix husky hook path

2f25160

Revert "chore: fix husky hook path"

d757597

This reverts commit 2f25160.

ci: force playwright browser install

0912fb0

fix(treeshake-frontend): ensure playwright browsers

39f4747

2heal1 had a problem deploying to npm February 5, 2026 05:30 — with GitHub Actions Failure

2heal1 had a problem deploying to npm February 5, 2026 05:51 — with GitHub Actions Failure

2heal1 had a problem deploying to npm February 5, 2026 06:16 — with GitHub Actions Failure

ScriptedAlchemy and others added 15 commits February 4, 2026 23:19

chore: merge main

f9b7ff6

Merge remote-tracking branch 'origin/main' into treeshake-packages

f1a7593

# Conflicts: # pnpm-lock.yaml

chore: sync lockfile after merging main

855b13c

chore: merge remote treeshake-packages

3d4388f

test(treeshake-server): align local store URL expectations

c662cea

Merge remote-tracking branch 'origin/main' into treeshake-packages

f05b2d7

# Conflicts: # pnpm-lock.yaml

Merge remote-tracking branch 'origin/main' into treeshake-packages

74436d7

# Conflicts: # pnpm-lock.yaml

chore(core): remove generated rsc-demo build outputs

2b9e8f6

fix: stabilize reshake fixture bootstrap paths

9e9d5aa

Merge remote-tracking branch 'origin/main' into HEAD

640ec86

Merge branch 'main' into treeshake-packages

a91b20f

Co-authored-by: Cursor <cursoragent@cursor.com>

Merge remote-tracking branch 'origin/treeshake-packages' into treesha…

0406919

…ke-packages Co-authored-by: Cursor <cursoragent@cursor.com>

chore(module-federation): fix actionlint workspace install

191aa95

Run actionlint from the runner temp directory with NODE_PATH to avoid npm workspace protocol errors. Co-authored-by: Cursor <cursoragent@cursor.com>

2heal1 approved these changes Feb 9, 2026

View reviewed changes

ScriptedAlchemy and others added 5 commits February 8, 2026 19:26

Merge branch 'main' into treeshake-packages

6b2fd77

Merge remote-tracking branch 'origin/main' into treeshake-packages

e1e28ab

fix(treeshake-server): keep metadata and avoid env logs

2386182

Preserve tree-shaking metadata in project uploads and avoid logging values derived from environment variables. Co-authored-by: Cursor <cursoragent@cursor.com>

Merge branch 'treeshake-packages' of github.com:module-federation/cor…

ba45307

…e into treeshake-packages

ci(treeshake-server): add dedicated e2e workflow

79caba7

Run treeshake server/frontend e2e tests in a separate CI job and wire it into the matrix. Co-authored-by: Cursor <cursoragent@cursor.com>

github-advanced-security bot found potential problems Feb 9, 2026

View reviewed changes

.github/workflows/e2e-treeshake.yml Fixed Show fixed Hide fixed

ScriptedAlchemy and others added 2 commits February 8, 2026 21:08

ci(treeshake-server): add treeshake e2e to ci:local

95db91f

Include treeshake server and frontend e2e runs in the local CI script with the affected check. Co-authored-by: Cursor <cursoragent@cursor.com>

ci(treeshake-server): limit workflow token permissions

b3e46b7

Define explicit read-only token permissions for the treeshake E2E workflow. Co-authored-by: Cursor <cursoragent@cursor.com>

ScriptedAlchemy merged commit 3cf5f3e into main Feb 9, 2026
23 checks passed

ScriptedAlchemy deleted the treeshake-packages branch February 9, 2026 05:37

2heal1 mentioned this pull request Feb 12, 2026

Release v2.0.1 #4424

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feat(treeshake): add treeshake server + frontend and optimize build/upload path#4372

feat(treeshake): add treeshake server + frontend and optimize build/upload path#4372
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