For alpha 11

[baxyz]

Description

Please include a summary of what this PR does and why it's needed.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactoring
• Test improvement

Related Issues

Closes #(issue number)

How Has This Been Tested?

Describe the tests you ran and how to reproduce them:

• Test A
• Test B

Checklist

• My code follows the code style of this project
• I have updated the documentation accordingly
• I have added tests for my changes
• All new and existing tests passed locally
• My commits follow the conventional commit format

Screenshots (if applicable)

Add screenshots for UI changes.

Additional Context

Add any other context about the PR here.

[Copilot]

Pull request overview

This PR adds several new utility helpers (array/object/number/type) with tests and examples, and integrates Stryker mutation testing reporting with the Stryker Dashboard (including a README badge and CI env wiring).

Changes:

• Add new helpers: compact, sum, pick, omit, isNullish (each with Vitest tests and example metadata files).
• Enable Stryker Dashboard reporting (Stryker config + CI secret env var + README badge update).

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
stryker.config.mjs	Adds Stryker Dashboard reporter/config for mutation reporting.
helpers/type/isNullish.ts	Introduces isNullish type guard helper.
helpers/type/isNullish.test.ts	Adds Vitest coverage for isNullish.
helpers/type/isNullish.example.ts	Adds example metadata for isNullish.
helpers/object/pick.ts	Introduces pick object helper.
helpers/object/pick.test.ts	Adds Vitest coverage for pick.
helpers/object/pick.example.ts	Adds example metadata for pick.
helpers/object/omit.ts	Introduces omit object helper.
helpers/object/omit.test.ts	Adds Vitest coverage for omit.
helpers/object/omit.example.ts	Adds example metadata for omit.
helpers/number/sum.ts	Introduces sum number helper.
helpers/number/sum.test.ts	Adds Vitest coverage for sum.
helpers/number/sum.example.ts	Adds example metadata for sum.
helpers/array/compact.ts	Introduces compact array helper.
helpers/array/compact.test.ts	Adds Vitest coverage for compact.
helpers/array/compact.example.ts	Adds example metadata for compact.
README.md	Updates mutation score badge to link to Stryker Dashboard endpoint.
.github/workflows/pr-validation.yml	Passes Stryker Dashboard API key into the mutation job environment.

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[github-actions]

✅ PR Validation Passed

All checks passed and coverage target reached!

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📋 Pipeline Status

	Job	Status
✅	🔢 Version	passing
✅	🏗️ Build	passing
✅	🧪 Tests	passing
✅	📝 Lint	passing
✅	📘 TypeCheck	passing
✅	🔐 Security Audit	passing
✅	🧾 Conventional Commits	passing
✅	🔗 Coherency	passing

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📊 Code Coverage

✅ Overall Coverage: 100.0% — Target reached! 🎯

	Metric	Progress	Coverage
✅	Lines	▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓	100%
✅	Branches	▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓	100%
✅	Functions	▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓	100%
✅	Statements	▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓	100%

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🧬 Mutation Testing

🟢 Mutation Score: 91.27% — excellent

	Metric	Progress	Score
🟢	Mutation Score	▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓░░	91.27%

🧬 Mutation testing is informational only and does not block the PR

📊 View full mutation report on Stryker Dashboard

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ℹ️ About this report

• 🎯 Coverage Target: 100% for all metrics
• 🧬 Mutation Testing: powered by Stryker (non-blocking)
• 🔄 This comment updates automatically with each push
• 📈 Coverage is measured using Vitest + v8

_{🤖 Generated by @helpers4 CI • 2026-04-13}