KeenWP

Curated resource guide

WordPress Core Development Resources

Understand how WordPress Core is built, tested, discussed, and released. This collection helps developers navigate the request lifecycle, major subsystems, Trac and GitHub workflows, coding standards, dev notes, backward compatibility, release testing, and the contribution process behind changes that affect the wider ecosystem.

Scope

What this guide covers

  • Core architecture and source code
  • bootstrap and request lifecycle
  • hooks and major subsystems
  • Trac and GitHub workflows
  • Core tickets and patches
  • coding standards
  • unit and integration tests
  • build tools
  • dev notes
  • field guides
  • release cycle
  • feature plugins
  • backward compatibility
  • deprecation policy
  • database schema
  • REST API internals
  • editor integration
  • media
  • users and capabilities
  • cron
  • HTTP API
  • filesystem
  • updates
  • multisite
  • performance
  • security
  • internationalization
  • accessibility
  • contributing patches
  • testing releases
  • and following Make WordPress Core development

Selected references

Curated resources

Links open the original publisher so you can use the complete, current material in context.

  1. 01
    5
    Recommended starting point

    Core Contributor Handbook

    The maintained guide to WordPress Core teams, workflows, testing, code contribution, and release practices.

    make.wordpress.org
  2. 02
    5

    WordPress Code Reference

    Search the generated reference for Core functions, classes, methods, hooks, and source context.

    developer.wordpress.org
  3. 03
    5

    WordPress Core Trac

    Follow Core tickets, milestones, patches, component history, and release decisions at their source.

    core.trac.wordpress.org
  4. 04
    5

    WordPress Develop Repository

    Browse and contribute to the development mirror containing Core source, build tools, and tests.

    github.com
  5. 05
    5

    WordPress Core PHPUnit Tests

    The official route to running the WordPress PHP test suite locally before a change reaches Core or dependent projects.

    make.wordpress.org
  6. 06
    5

    WordPress Core Dev Notes

    Track developer-facing behavior and API changes before each WordPress release reaches production.

    make.wordpress.org
  7. 07
    5

    WordPress Core Field Guides

    Use release field guides as an index of the technical changes that may affect existing products.

    make.wordpress.org