feat: tsup build alignment and local setup fixes by ScriptedAlchemy · Pull Request #4460 · module-federation/core

ScriptedAlchemy · 2026-02-18T07:18:22Z

Summary

align tsup package build configs to use unbundled outputs where applicable
ensure module federation packages are treated as external in tsup package configs
improve local CI portability by adding a macOS-safe CPU core detection fallback
fix codex setup script for worktree installs when no extra install args are passed

Validation

pnpm run ci:local --only=build-and-test (in progress previously; build stages validated)
npx nx run-many --targets=build --projects=error-codes,runtime,runtime-core,runtime-tools,inject-external-runtime-core-plugin,webpack-bundler-runtime,sdk --parallel=3 --skip-nx-cache
./scripts/codex-setup.sh -- --frozen-lockfile

Single-PR Review Guide (No Additional PRs)

This PR will remain a single PR. Improvements are being done in-place (no stacked or follow-up PR splitting).

Suggested Review Order

Core behavior/runtime changes first.
Build/tooling and workflow updates second.
Docs/examples/app fixtures last.

In-Place Scope Trim Checklist

Remove unrelated churn not required for this PR goal.
Keep lockfile and generated changes only when strictly needed.
Confirm acceptance criteria and regression tests are explicit in this PR.
Resolve merge conflict status and required CI checks before final re-review.

Co-authored-by: zackary.l.jackson <zackary.l.jackson@gmail.com>

…xport

…essor

Use tsdown with nx run-commands for migrated packages and align export and type outputs for publint. Remove legacy rollup configs and add shared migration scaffolding. Co-authored-by: Cursor <cursoragent@cursor.com>

Align package build metadata with tsdown output and type extension updates. Remove CJS fallback from ESM runtime alias resolution for consistent module format selection. Co-authored-by: Cursor <cursoragent@cursor.com>

Use .d.mts for import types so exports match emitted ESM declaration files. Co-authored-by: Cursor <cursoragent@cursor.com>

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packages/data-prefetch/rslib.config.ts

packages/enhanced/src/lib/container/runtime/FederationRuntimePlugin.ts

packages/node/src/filesystem/stratagies.ts

# Conflicts: # .cursorignore

ScriptedAlchemy · 2026-02-28T01:26:14Z

packages/data-prefetch/src/cli/index.ts

-    const runtimePath = path.resolve(__dirname, './plugin.esm.js');
+    const runtimePluginCandidates =
+      process.env.IS_ESM_BUILD === 'true'
+        ? ['../plugin.js', '../plugin.cjs']


why do we have to do this id we have esm and cjs already why cant paths just be corerct? isnt this both cjs and esm build output?

ScriptedAlchemy · 2026-02-28T01:28:02Z

packages/enhanced/src/lib/container/runtime/FederationRuntimePlugin.ts

+
+  // Keep legacy dist entry names as fallbacks for mixed plugin/runtime versions.
+  // Resolve package root last to avoid accidentally selecting a CJS export when
+  // an explicit ESM fallback file exists in legacy runtime layouts.


instad of checking based on bnudler conditions, since this package uses tsdown and it ahs define for its esm and cjs build outputs, cant we use that to conditionally proces.env.SI_ESM_BUILD to set the assets for the esm version aand cjs version fo the libary build outpus instead?

cursoragent and others added 29 commits February 17, 2026 20:44

feat(runtime): add shared webpack require accessor helpers

e22f492

Co-authored-by: zackary.l.jackson <zackary.l.jackson@gmail.com>

fix(utils): update remote container typing for helper import

dce6b4d

refactor(runtime-core): decouple bundler ignore helper from sdk exports

76c2216

fix(utils): keep remote container type surface unchanged

adff9b6

fix(webpack-bundler-runtime): keep internal direct webpack require usage

707aab5

refactor(utils): simplify esm remote initialization typing

aa47578

fix(webpack-bundler-runtime): use module-level webpack require accessor

14d1b76

feat(runtime-core): prefer bundler runtime import ignore helper

04ba1b4

refactor(webpack-bundler-runtime): keep ignore helper as standalone e…

7b274f1

…xport

Merge branch 'main' into cursor/bundler-runtime-require-access-725d

e3de5a3

refactor(node): migrate runtime webpack require access to bundler acc…

e0c0704

…essor

refactor: keep webpack require helpers on accessor entrypoint

f953e6e

test(webpack-bundler-runtime): avoid global webpack require mutation

4c257d8

refactor(runtime-core): source bundler-ignore helper from sdk

92b7ec0

refactor(sdk): expose bundler helper via standalone entrypoint

2e41604

refactor: route webpack runtime helpers through sdk bundler entry

49d79a6

refactor(core): migrate selected packages from rollup to tsdown

0ffd5be

Use tsdown with nx run-commands for migrated packages and align export and type outputs for publint. Remove legacy rollup configs and add shared migration scaffolding. Co-authored-by: Cursor <cursoragent@cursor.com>

fix(error-codes): align import types extension

b0ab6dc

Use .d.mts for import types so exports match emitted ESM declaration files. Co-authored-by: Cursor <cursoragent@cursor.com>

fix(utils): avoid esm namespace mutation and defer webpack require

385f226

refactor(webpack-bundler-runtime): remove accessor entrypoint leftovers

0211f52

fix(webpack-bundler-runtime): use sdk bundler webpack require

ac23c9a

fix: add regression coverage and align release metadata

c911bb6

fix(node): inline webpack require in runtime chunk strategies

ce7453a

feat(sdk): expose webpack sharing accessors in bundler entry

f2ba7eb

fix(node): use sdk bundler accessor in strategies

ca9fea3

Merge branch 'cursor/bundler-runtime-require-access-725d' into feat/tsup

bc4c4e4

fix: align tsdown unbundle and federation externals

cf22aee

fix: handle empty install args in codex setup

abd5278

ScriptedAlchemy added 2 commits February 25, 2026 22:35

fix(data-prefetch): branch runtime plugin path by build format

f4fec2a

refactor(data-prefetch): use deterministic runtime plugin path

00f5752

2heal1 temporarily deployed to npm February 26, 2026 08:16 — with GitHub Actions Inactive

ScriptedAlchemy and others added 2 commits February 26, 2026 00:20

Merge origin/main into feat/tsup

fa2e4de

Merge branch 'main' into feat/tsup

5cf4ae8

ScriptedAlchemy commented Feb 27, 2026

View reviewed changes

packages/data-prefetch/rslib.config.ts Show resolved Hide resolved

ScriptedAlchemy commented Feb 27, 2026

View reviewed changes

packages/enhanced/src/lib/container/runtime/FederationRuntimePlugin.ts Outdated Show resolved Hide resolved

ScriptedAlchemy commented Feb 27, 2026

View reviewed changes

packages/node/src/filesystem/stratagies.ts Outdated Show resolved Hide resolved

ScriptedAlchemy added 2 commits February 26, 2026 16:55

fix(runtime): restore runtime resolution and tsdown wiring

64e51bf

fix(data-prefetch): fallback plugin path resolution across esm/cjs

d8962b5

ScriptedAlchemy mentioned this pull request Feb 27, 2026

chore: canary deps from core PR 4460 + repotools canary command module-federation/module-federation-examples#4418

Open

ScriptedAlchemy added 5 commits February 26, 2026 19:43

fix: address ci regressions and export compatibility

b4706a2

chore(nextjs-mf): fix format check for index entry

63b5c25

chore: remove local workspace config artifacts

3b2c826

fix: harden runtime compatibility across esm/cjs paths

265c2ca

fix(nextjs-mf): normalize enhanced cjs/esm interop in container plugin

0ff81ec

2heal1 temporarily deployed to npm February 27, 2026 06:11 — with GitHub Actions Inactive

ScriptedAlchemy and others added 4 commits February 26, 2026 22:19

fix(nextjs-mf): gate cjs export shim by build format

44def73

Merge branch 'main' into feat/tsup

14ba6a6

fix(nextjs-mf): resolve internal runtime paths in esm builds

0a9e9bb

fix: update live reload entry file path to use correct extension

cfb7e7b

2heal1 temporarily deployed to npm February 27, 2026 10:52 — with GitHub Actions Inactive

ScriptedAlchemy and others added 2 commits February 27, 2026 15:32

Merge remote-tracking branch 'origin/main' into feat/tsup

4ec5bcd

# Conflicts: # .cursorignore

Merge branch 'main' into feat/tsup

e7a8632

ScriptedAlchemy commented Feb 28, 2026

View reviewed changes

ScriptedAlchemy mentioned this pull request Feb 28, 2026

Process env build paths #4482

Merged

5 tasks

ScriptedAlchemy merged commit 918294f into main Feb 28, 2026
29 of 41 checks passed

ScriptedAlchemy deleted the feat/tsup branch February 28, 2026 06:47

2heal1 mentioned this pull request Mar 5, 2026

Release v2.1.0 #4500

Merged

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feat: tsup build alignment and local setup fixes#4460

feat: tsup build alignment and local setup fixes#4460
ScriptedAlchemy merged 74 commits intomainfrom
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Summary

Validation

Single-PR Review Guide (No Additional PRs)

Suggested Review Order

In-Place Scope Trim Checklist

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ScriptedAlchemy commented Feb 18, 2026 •

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