feat(@angular/build): add library builder #34106

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alan-agius4 opened 11:21am on September 17, 2026 wants to merge 1 Δ into angular/angular-cli main from
feat/library-builder

Pull request #34106 quality checks

Code files and functions touched by this pull request are analyzed below.

Quality targets

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Target name Target value This PR
Maximum Diff Delta per PR 500 1
Maximum comment count per PR 10 12
Pull request maximum business days between activity 3 2
Pull request maximum business days open 5 2

Coupled files

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No file coupling detected. 🎉

Biggest files changes in pull request

Path View whole file Lines removed Lines added Final line count
modules/testing/builder/src/builder-harness.ts 0 0 550
packages/angular/build/src/builders/unit-test/builder.ts 0 0 ---
packages/angular/build/src/builders/library/pipeline/package-json_spec.ts 0 0 ---
packages/angular/build/src/builders/application/options.ts 0 0 ---
packages/angular/build/src/builders/library/tests/options/assets_spec.ts 0 0 ---
packages/angular/build/src/utils/concurrency_spec.ts 0 0 ---
packages/angular/build/src/builders/library/tests/setup.ts 0 0 ---
packages/angular/build/src/builders/unit-test/tests/behavior/library-target_spec.ts 0 0 ---
packages/angular/build/src/tools/esbuild/persistent-load-result-cache.ts 0 0 ---
packages/angular/build/src/builders/library/tests/behavior/watch_spec.ts 0 0 ---
packages/angular/build/src/builders/library/tests/options/declaration-map_spec.ts 0 0 ---
packages/angular/build/src/tools/angular/compilation/angular-compilation.ts 0 0 ---
packages/angular/build/src/builders/library/schema.json 0 0 ---
packages/angular/build/src/builders/library/tests/options/keep-lifecycle-scripts_spec.ts 0 0 ---
packages/angular/build/src/tools/esbuild/stylesheets/css-resource-plugin.ts 0 0 ---
packages/angular/build/src/builders/library/pipeline/types.d.ts 0 0 ---
packages/angular/build/src/builders/library/tests/options/output-path_spec.ts 0 0 ---
packages/angular/build/src/builders/library/options.ts 0 0 ---
packages/angular/build/src/builders/library/pipeline/build-action.ts 0 0 ---
packages/angular/build/src/builders/library/index.ts 0 0 ---
packages/angular/build/src/builders/library/tests/behavior/build_spec.ts 0 0 ---
packages/angular/build/src/builders/unit-test/tests/behavior/vitest-zone-init_spec.ts 0 0 ---
packages/angular/build/src/builders/library/pipeline/bundler.ts 0 0 ---
packages/angular/build/src/builders/library/pipeline/utils.ts 0 0 ---
packages/angular/build/src/builders/library/tests/behavior/styles_spec.ts 0 0 ---
packages/angular/build/src/tools/esbuild/watcher_spec.ts 0 0 ---
packages/angular/build/src/utils/concurrency.ts 0 0 ---
packages/angular/build/src/builders/library/pipeline/compilation.ts 0 0 ---
packages/angular/build/src/builders/library/tests/behavior/rebuild_spec.ts 0 0 ---
packages/angular/build/src/builders/library/pipeline/entry-point-scanner.ts 0 0 ---
packages/angular/build/src/builders/library/tests/options/allowed-non-peer-dependencies_spec.ts 0 0 ---
packages/angular/build/src/builders/library/pipeline/assets.ts 0 0 ---
packages/angular/build/src/builders/library/pipeline/compiler-worker.ts 0 0 ---
packages/angular/build/src/builders/library/tests/behavior/core_spec.ts 0 0 ---
packages/angular/build/src/builders/application/build-action.ts 0 0 ---
packages/angular/build/BUILD.bazel 0 0 ---
packages/angular/build/src/builders/library/pipeline/entry-point-graph.ts 0 0 ---
packages/angular/cli/lib/config/workspace-schema.json 0 0 ---
packages/angular/build/src/builders/library/pipeline/stylesheet-bundler.ts 0 0 ---
packages/angular/build/src/builders/library/tests/behavior/secondary_spec.ts 0 0 ---
packages/angular/build/src/builders/library/tests/behavior/apf_spec.ts 0 0 ---
packages/angular/build/src/tools/angular/compilation/index.ts 0 0 ---
packages/angular/build/src/builders/library/pipeline/package-json.ts 0 0 ---
packages/angular/build/src/builders/library/tests/options/compilation-mode_spec.ts 0 0 ---
packages/angular/build/src/utils/postcss-configuration.ts 0 0 ---
packages/angular/build/src/tools/esbuild/watcher.ts 0 0 ---
packages/angular/build/builders.json 0 0 ---
packages/angular/build/src/builders/library/builder.ts 0 0 ---
packages/angular/build/src/tools/angular/compilation/library-compilation.ts 0 0 ---
packages/angular/build/src/builders/library/tests/options/delete-output-path_spec.ts 0 0 ---
packages/angular/build/src/tools/esbuild/stylesheets/bundle-options.ts 0 0 ---
packages/angular/build/src/builders/library/tests/options/entry-points_spec.ts 0 0 ---
pnpm-lock.yaml 0 0 ---
packages/angular/build/package.json 0 0 ---

️ Biggest functions grown or shrunk by pull request

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