Build: NX evaluation — ci:daily #1

[kasperpeulen]

What I did

Automated evaluation PR for NX Cloud vs CircleCI comparison.

Workflow: ci:daily

This PR exists only to collect CI run data for the NX vs CircleCI evaluation. Retrigger pushes will bust the NX cache via codexCacheBust in nx.json to ensure fresh runs on both systems.

Do not merge.

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

No manual testing needed — this PR only triggers CI runs for data collection.

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:daily or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.

🦋 Canary release

This PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 6f27644

Command	Status	Duration	Result
nx run-many -t compile,check,knip,test,lint,fmt...	✅ Succeeded	16m 3s	View ↗

---

☁️ Nx Cloud last updated this comment at 2026-04-16 15:40:10 UTC

[coderabbitai]

Caution

Review failed

Failed to post review comments

📝 Walkthrough

Walkthrough

This PR introduces Windows CI experimental support, adds new Storybook initialization targets (init-empty and init-features), implements an NX Cloud/CircleCI evaluation benchmarking tool, reorganizes Nx agent/workflow assignments, and applies a conditional nxExperiment flag to gate platform-specific CI jobs.

Changes

Cohort / File(s)	Summary
MCP & CI Tooling Configuration .cursor/mcp.json, .github/workflows/nx.yml	Replaced Wallaby MCP server with nx-mcp command. Added workflow-level concurrency grouping and Linux execution environment to main job; appended commented-out Windows CI job variants with Windows-specific configuration and conditional daily scheduling.
Nx Agent & Workflow Assignment Configuration .nx/workflows/agents.yaml, .nx/workflows/assignment-rules-windows.yaml, .nx/workflows/distribution-config-daily.yaml	Downgraded Linux browser resource class and removed Windows agent template. Added Windows assignment rules for task distribution and new init-empty/init-features target assignment to Linux agents with serialized execution.
Core Nx & Project Target Configuration nx.json, code/project.json	Added init-empty and init-features target definitions to targetDefaults for Storybook initialization workflows. Updated code project test inputs and added new storybook-build and storybook-chromatic targets with caching and dependency configuration. Updated cache bust timestamp.
Sandbox Project Target Configuration code/sandbox/lit-vite-default-ts/project.json, code/sandbox/nextjs-default-ts/project.json, code/sandbox/react-vite-default-ts/project.json, code/sandbox/vue3-vite-default-ts/project.json	Added init-empty target with environment variable configuration to each sandbox. Added init-features target and ci:windows tag to React Vite sandbox only.
Codemod & Sandbox Generation Scripts code/lib/codemod/src/index.ts, scripts/create-nx-sandbox-projects.ts	Updated codemod file discovery to use absolute paths for Windows cross-drive compatibility. Added template mapping and conditional target injection logic for init-empty and init-features targets in sandbox project generation.
CI Generation & Orchestration Scripts scripts/ci/main.ts, scripts/ci/init-empty.ts, scripts/ci/sandboxes.ts	Introduced NX_EXPERIMENT flag to conditionally gate Windows jobs, Storybook/benchmark tasks, and initialization jobs. Updated function signatures to accept experiment option and modified job selection logic accordingly.
CI Evaluation & Benchmarking Tool scripts/evaluate-ci.ts, scripts/project.json	Added new benchmarking script that queries CircleCI and NX Cloud APIs, computes cost/credit metrics, flake rates, and duration analytics, then generates comparative reports. Added corresponding bench-packages Nx target in scripts project.
Dependencies & Metadata package.json, test-storybooks/portable-stories-kitchen-sink/react-vitest-3/project.json, test-storybooks/yarn-pnp/project.json	Updated Nx dependencies to ^22.6.5. Removed or restricted CI tags on test-storybook projects.

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~50 minutes

Possibly related PRs

• CircleCI: Dynamic config setup #32925 — Both modify CI generation scripts (scripts/ci/main.ts, init-empty.ts, sandboxes.ts) to add conditional logic for job control, indicating related changes to the same dynamic CI configuration system.
• Build: Update nx to 22 and invalidate cache when scripts change  #33059 — Both update Nx configuration files (nx.json) and bump Nx dependencies in package.json, touching overlapping workspace setup and configuration areas.
• Codemod: Fix glob pattern handling on Windows #33714 — Both modify code/lib/codemod/src/index.ts to enhance Windows path handling in file discovery, addressing the same cross-drive compatibility concern.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[kasperpeulen]

Superseded by RC-sweep experiment — closing to wind down this branch's CI traffic. Branch intentionally not deleted (DB data references it). Do not merge.