chore: use tsx for Nx commands to execute local plugins same as other projects

[BioPhoton]

Problem
This repository uses local Nx plugins and async generators written in TypeScript that need to:

• Import files with .js extensions (ES modules convention)
• Resolve TypeScript path aliases (e.g., @code-pushup/models)

Without proper TypeScript execution setup, Nx commands fail when trying to execute these local plugins/generators.

Solution
Explicit environment variable configuration for both local development and CI:

• Local Development - Use .env.local (gitignored)
• Developers copy .env.local.example to .env.local
• Nx automatically loads .env.local files
• CI - Set environment variables explicitly at workflow level
  • NODE_OPTIONS=--import tsx - Enables TypeScript execution
  • TSX_TSCONFIG_PATH=tsconfig.base.json - Resolves path aliases

Background

Why SWC is skipped when running Nx with NODE_OPTIONS="--import tsx"

Nx has hardcoded transpiler-selection logic for local TS/TSX execution (plugins, executors, generators).
When running with a Node loader like tsx, Nx does not register SWC, even if SWC is available.

Relevant source:
https://github.com/nrwl/nx/blob/81c157d0631927b3d1891453aa45652f3b5a7988/packages/nx/src/plugins/js/utils/register.ts

Key logic:

export function registerTranspiler(
  compilerOptions: CompilerOptions,
  tsConfigRaw?: unknown
): () => void {
  const transpiler = getTranspiler(compilerOptions, tsConfigRaw);

  if (!transpiler) {
    warnNoTranspiler();
    return () => {};
  }

  return transpiler();
}

If getTranspiler(...) returns undefined, Nx intentionally does not register SWC or ts-node.

getTranspiler(...) only detects:

• @swc-node/register
• ts-node

Node loaders like tsx are not detected, so:

• getTranspiler(...) === undefined
• registerTranspiler becomes a no-op
• SWC is effectively disabled by design for this execution path

This is not in @nx/js:swc, but in Nx’s runtime TS/TSX plugin execution pipeline.
Running with NODE_OPTIONS="--import tsx" therefore bypasses SWC via hardcoded logic.

Related:

• refactor: add sync generator for zod2md tooling setup #1188
• refactor: add sync generator for zod2md tooling setup #1188 (comment)

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 3571d73

Command	Status	Duration	Result
nx run ci:code-pushup -- merge-diffs --files=/h...	✅ Succeeded	5s	View ↗
nx run-many --targets=code-pushup --parallel=fa...	✅ Succeeded	1m 30s	View ↗
nx run-many --targets=code-pushup --parallel=fa...	✅ Succeeded	13m	View ↗
nx run-many -t unit-test,int-test	✅ Succeeded	3s	View ↗

---

☁️ Nx Cloud last updated this comment at 2026-02-08 15:41:22 UTC

[pkg-pr-new]

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@code-pushup/ci

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/ci@1241

@code-pushup/cli

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/cli@1241

@code-pushup/core

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/core@1241

@code-pushup/create-cli

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/create-cli@1241

@code-pushup/models

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/models@1241

@code-pushup/axe-plugin

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/axe-plugin@1241

@code-pushup/nx-plugin

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/nx-plugin@1241

@code-pushup/coverage-plugin

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/coverage-plugin@1241

@code-pushup/eslint-plugin

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/eslint-plugin@1241

@code-pushup/js-packages-plugin

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/js-packages-plugin@1241

@code-pushup/jsdocs-plugin

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/jsdocs-plugin@1241

@code-pushup/lighthouse-plugin

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@code-pushup/typescript-plugin

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/typescript-plugin@1241

@code-pushup/utils

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/utils@1241

commit: 3571d73

[github-actions]

Code PushUp

🤨 Code PushUp report has both improvements and regressions – compared current commit 9f23abb with previous commit 3dbf378.

🕵️ See full comparison in Code PushUp portal 🔍

🏷️ Categories

🏷️ Category	⭐ Previous score	⭐ Current score	🔄 Score change
Updates	🟡 78	🟡 75
Performance	🔴 37	🔴 35
Bug prevention	🟡 75	🟡 75
Axe Accessibility	🟡 88	🟡 88
Code style	🟢 100	🟢 100	–
Code coverage	🟢 93	🟢 93	–
Security	🔴 47	🔴 47	–
Type Safety	🟡 67	🟡 67	–
Miscellaneous	🟡 67	🟡 67	–
Documentation	🟡 53	🟡 53	–
Accessibility	🟢 92	🟢 92	–
Best Practices	🟢 100	🟢 100	–
SEO	🟢 92	🟢 92	–

👎 2 groups regressed, 👍 4 audits improved, 👎 3 audits regressed, 12 audits changed without impacting score

🗃️ Groups

🔌 Plugin	🗃️ Group	⭐ Previous score	⭐ Current score	🔄 Score change
JS packages	npm outdated dependencies	🟡 78	🟡 75
Lighthouse	Performance	🔴 37	🔴 35

32 other groups are unchanged.

🛡️ Audits

🔌 Plugin	🛡️ Audit	📏 Previous value	📏 Current value	🔄 Value change
Lighthouse	Minify CSS	🟨 Potential savings of 10 KiB	🟩 0
Lighthouse	Total Blocking Time	🟥 1,310 ms	🟥 1,980 ms
Lighthouse	First Contentful Paint	🟥 3.5 s	🟥 3.3 s
Lighthouse	Speed Index	🟥 7.3 s	🟥 7.0 s
JS packages	Outdated npm prod dependencies.	🟨 20 outdated package versions (5 major, 11 minor, 4 patch)	🟨 20 outdated package versions (6 major, 10 minor, 4 patch)
Lighthouse	Time to Interactive	🟥 13.4 s	🟥 13.8 s
JS packages	Outdated npm dev dependencies.	🟨 62 outdated package versions (29 major, 25 minor, 8 patch)	🟨 62 outdated package versions (29 major, 25 minor, 8 patch)
Lighthouse	Avoids enormous network payloads	🟩 Total size was 2,119 KiB	🟩 Total size was 2,098 KiB
Lighthouse	JavaScript execution time	🟥 3.2 s	🟥 4.0 s
Lighthouse	Minimizes main-thread work	🟥 10.2 s	🟥 10.7 s
Lighthouse	Metrics	🟩 100%	🟩 100%
Lighthouse	Uses efficient cache policy on static assets	🟨 31 resources found	🟨 31 resources found
Lighthouse	Server Backend Latencies	🟩 1,220 ms	🟩 1,060 ms
Lighthouse	Remove duplicate modules in JavaScript bundles	🟥 Potential savings of 91 KiB	🟥 Potential savings of 81 KiB
Lighthouse	Max Potential First Input Delay	🟥 1,080 ms	🟥 1,190 ms
Lighthouse	Initial server response time was short	🟩 Root document took 560 ms	🟩 Root document took 470 ms
Lighthouse	Largest Contentful Paint	🟥 12.3 s	🟥 12.4 s
Lighthouse	Network Round Trip Times	🟩 70 ms	🟩 70 ms
JS packages	Vulnerabilities for npm dev dependencies.	🟥 47 vulnerabilities (3 critical, 9 high, 32 moderate, 3 low)	🟥 48 vulnerabilities (3 critical, 9 high, 32 moderate, 4 low)

660 other audits are unchanged.

[github-actions]

Code PushUp

🥳 Code PushUp report has improved – compared current commit 9f23abb with previous commit 3dbf378.

💼 Project utils

🥳 Code PushUp report has improved.

🕵️ See full comparison in Code PushUp portal 🔍

🏷️ Category	⭐ Previous score	⭐ Current score	🔄 Score change
Code coverage	🟢 95	🟢 95
Documentation	🟡 61	🟡 61

4 other categories are unchanged.

👍 2 groups improved, 👍 1 audit improved

🗃️ Groups

🔌 Plugin	🗃️ Group	⭐ Previous score	⭐ Current score	🔄 Score change
Code coverage	Code coverage metrics	🟢 95	🟢 95
JSDocs coverage	Documentation coverage	🟡 61	🟡 61

13 other groups are unchanged.

🛡️ Audits

🔌 Plugin	🛡️ Audit	📏 Previous value	📏 Current value	🔄 Value change
Code coverage	Branch coverage	🟩 91.9 %	🟩 91.9 %

443 other audits are unchanged.

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13 other projects are unchanged.