WordPress Plugin Dependency Checklist for Publishers

Quick Answer

A WordPress plugin dependency checklist should identify which plugins require other plugins, whether the required dependencies are installed and active, whether the dependency relationship is declared with the WordPress Requires Plugins header, and what update or rollback order the site owner should follow. The best fit for a small publisher is a simple dependency register: dependent plugin, required plugin, current activation state, update owner, staging result, and rollback note before changing production plugins.

Plugin Dependency Decision Matrix

Situation	What to check	Better publisher decision
New addon plugin	Required base plugin and activation order	Install and activate the dependency first
Existing plugin stack	Which active plugins depend on another plugin	Avoid deleting a shared dependency casually
Failed activation	WordPress, PHP, and required plugin headers	Treat the blocker as a requirement, not a random error
Plugin update window	Dependency and dependent update sequence	Update in staging before production when the stack is important
Plugin cleanup	Active dependents and site features using the plugin	Remove the dependent first, then the dependency
Unknown vendor bundle	Whether dependencies come from WordPress.org slugs	Ask for vendor notes before production changes
Post-change evidence	Public pages, admin notices, Site Health, and rollback owner	Record the result instead of relying on memory

Who Should Use This Checklist?

Use this checklist when a WordPress publisher, editor-operator, site maintainer, or small technical team installs an addon plugin, updates a plugin bundle, removes an unused extension, reviews a plugin conflict, cleans up old plugins, or prepares a staging test before a production maintenance window.

This is WordPress site-operations guidance, not security consulting, legal advice, privacy compliance advice, AdSense account advice, hosting procurement advice, or a private plugin audit. It does not change Google AdSense, Search Console, Bing Webmaster Tools, DNS, hosting credentials, payment settings, tax settings, production plugin files, or live posts. The article uses official WordPress documentation and code reference material as source notes. No private WordPress dashboard, plugin screen, WP-CLI session, database, server log, staging site, production URL, analytics account, Search Console property, or AdSense account was inspected for this article.

The operating problem is not that plugin dependencies are bad. The problem is that a small site can forget which plugin is the base layer and which plugin is only an extension. When that relationship is invisible, a routine cleanup can deactivate a feature, break an editor workflow, or turn a plugin update into a confusing incident.

Step 1: Name The Dependency Relationship

WordPress 6.5 introduced a Plugin Dependencies feature for plugins that build on other plugins. The official developer note describes dependents as plugins that rely on dependencies, and the Plugin Handbook documents the Requires Plugins header field. That header uses WordPress.org-formatted plugin slugs rather than plugin file paths.

Use this register before touching the plugin stack:

• [ ] Dependent plugin name.
• [ ] Required dependency plugin name.
• [ ] WordPress.org slug if the dependency is public.
• [ ] Current installed state for both plugins.
• [ ] Current active state for both plugins.
• [ ] Whether the dependent declares Requires Plugins.
• [ ] Whether the dependency is shared by more than one feature.
• [ ] Owner for the next update, deactivation, or removal decision.

For a publisher, the useful evidence is not the PHP header by itself. The useful evidence is the operational relationship: this newsletter addon requires this form plugin, this block extension requires this editor plugin, this ecommerce helper requires this base ecommerce plugin, or this performance addon requires this performance framework.

Step 2: Separate Install Order From Update Order

The WordPress Core merge announcement describes dependency behavior around installation, activation, deactivation, and deletion. A dependent should not be treated as ready until its required dependency is installed and active. A dependency should not be removed as if it were standalone when another active plugin relies on it.

Use this order table:

Action	Safer order	Evidence to record
Install a dependent addon	Install dependency, activate dependency, install dependent, activate dependent	Names, versions, and admin notice result
Activate after upload	Activate required plugin first	Activation screen result and any blocker message
Update both plugins	Update dependency and dependent in a watched window	Staging result, production timestamp, and owner
Deactivate a feature	Deactivate dependent first	Public feature check and admin notice result
Delete old plugins	Confirm no active dependent needs the plugin	Backup note and cleanup reason
Roll back a problem	Restore the dependency pair to a known state	Version pair and rollback owner

Do not assume alphabetic order, bulk update order, or a plugin list position is the correct operating order. A plugin dependency is a relationship. The site owner should know which item supports the other item before updating, disabling, or deleting either one.

Step 3: Watch For Header Limits

The Plugin Handbook documents Requires Plugins as a comma-separated list of WordPress.org-formatted slugs. The Core developer note also explains that slugs such as my-plugin are supported, while file paths such as my-plugin/my-plugin.php are not supported. The merge announcement says version management through that header is not currently supported.

Use this interpretation checklist:

• [ ] Treat Requires Plugins as a dependency signal, not a complete compatibility audit.
• [ ] Do not expect the header to prove minimum or maximum dependency versions.
• [ ] Do not assume a third-party commercial plugin dependency is fully represented by a WordPress.org slug.
• [ ] Keep WordPress version and PHP version checks separate from plugin dependency checks.
• [ ] Ask the vendor for upgrade order when a bundle includes private, premium, or bundled plugins.
• [ ] Recheck after a plugin changes ownership, slug, distribution channel, or onboarding flow.

This matters because many publisher plugin stacks include a mix of public WordPress.org plugins and commercial add-ons. WordPress Core can help expose some relationships, but it does not replace vendor release notes, staging tests, backup evidence, or defensive update planning.

Step 4: Turn Activation Errors Into Requirements

The WordPress code reference for validate_plugin_requirements() shows that WordPress validates plugin requirements using headers for WordPress version, PHP version, and required plugins. The WP_Plugin_Dependencies reference describes a core class designed around dependencies from the Requires Plugins header and plugin install-page handling.

Use this troubleshooting flow when activation is blocked:

1. Read the exact admin notice or CLI error. 2. Confirm whether the blocker is WordPress version, PHP version, missing dependency, inactive dependency, or circular dependency. 3. Confirm whether the required plugin is installed from the expected source. 4. Activate the dependency first when that is the missing step. 5. Recheck the dependent plugin only after the requirement is satisfied. 6. Record the final decision instead of retrying repeatedly.

The better choice is to slow down when WordPress reports an unmet requirement. Repeated activation attempts do not resolve a missing dependency, outdated PHP branch, incompatible WordPress version, or circular dependency. The operator should convert the message into a short requirement note and decide whether to install, update, pause, or roll back.

Step 5: Review Dependents Before Cleanup

Plugin cleanup can save maintenance effort, but it can also remove the base layer for a feature that still matters. The Core developer note describes API methods that can answer whether a plugin has dependencies or dependents. Even when an operator does not call those methods directly, the operating question is the same: what depends on this plugin?

Use this cleanup checklist:

• [ ] Search the plugin list for plugins that mention the same feature family or vendor.
• [ ] Check whether the plugin row or install screen identifies required plugins.
• [ ] Review public pages that rely on the feature.
• [ ] Review editor screens, forms, blocks, shortcodes, or scheduled tasks tied to the plugin.
• [ ] Deactivate the dependent feature first when removing a dependency.
• [ ] Keep a backup or rollback path for content-facing plugins.
• [ ] Record why the plugin was kept, removed, or postponed.

For small editorial sites, the risk is often boring: a form addon, SEO extension, block library, analytics connector, or cache helper is removed because it looks unused. If another plugin depends on it, the cleanup creates a support issue that could have been avoided with a five-minute dependency register.

Step 6: Pair Dependency Changes With Staging

A dependency relationship raises the blast radius of a plugin change. If a plugin supports forms, SEO metadata, blocks, caching, redirects, analytics, memberships, or editorial workflows, staging should be the default place to test the pair before production.

Use this staging evidence table:

Evidence item	Why it matters	Internal link to use
Plugin update note	Shows which plugin pair changed	wordpress-plugin-update-checklist
Conflict result	Separates dependency blockers from plugin conflicts	wordpress-plugin-conflict-troubleshooting-checklist
Site Health note	Captures WordPress, PHP, HTTPS, and server warnings	wordpress-site-health-review-checklist
Staging pass	Confirms public and admin paths before production	wordpress-staging-site-checklist
PHP compatibility	Keeps runtime requirements visible	wordpress-php-version-upgrade-checklist
Backup receipt	Gives the operator a rollback path	wordpress-backup-restore-checklist

Do not write public copy that claims a dependency stack was tested unless there is private evidence attached to that specific site. For public publishing, it is enough to explain the source-derived workflow and keep private screenshots, logs, or admin notices out of the article.

Step 7: Keep The Update Log Boring

The cleanest plugin dependency review is a short note that another operator can understand later. It does not need a long incident report unless something breaks.

Use this note format:

• [ ] Date and owner.
• [ ] Dependent plugin and version.
• [ ] Dependency plugin and version.
• [ ] WordPress and PHP baseline if relevant.
• [ ] Staging result.
• [ ] Production change result.
• [ ] Public page or admin screen checked.
• [ ] Rollback path or decision to postpone.
• [ ] Next review trigger.

The best fit for a publisher is a repeatable maintenance note. Plugin dependency work should not live only in memory, a Slack thread, or a half-remembered plugin support ticket. If the dependency matters enough to affect activation, it matters enough to record.

What Should A WordPress Plugin Dependency Audit Include?

A complete WordPress plugin dependency audit should include the dependent plugin, required dependency plugin, declared Requires Plugins header if available, installed state, active state, WordPress version requirement, PHP requirement, shared dependents, staging result, update order, cleanup decision, backup note, rollback owner, and next review trigger. The audit is ready when the operator can explain which plugin must stay active for another plugin to work and what evidence supports the next update or removal.

FAQ

Is Requires Plugins the same as a full compatibility guarantee?

No. Official WordPress documentation treats it as a way to declare required plugin slugs. It does not replace version compatibility review, vendor release notes, staging tests, PHP checks, WordPress version checks, or rollback planning.

Should a publisher delete a dependency after disabling an addon?

Only after confirming no active plugin still depends on it and no public feature still uses it. Deactivate the dependent feature first, check the site, then decide whether the dependency can be removed.

Does this checklist require editing plugin PHP files?

No. Most publishers should not edit plugin headers. The checklist is for reviewing dependency signals, admin notices, update order, staging evidence, and cleanup decisions. Plugin authors and developers own header implementation.

Can this prevent every plugin conflict?

No. Plugin Dependencies helps expose declared relationships. It does not eliminate unrelated conflicts, shared library issues, theme conflicts, cache problems, missing PHP extensions, or vendor-specific onboarding behavior.

How often should this checklist be reviewed?

Review it every 60 days, and sooner before major WordPress updates, PHP upgrades, plugin bundle changes, commercial plugin renewals, bulk plugin updates, plugin cleanup, or any production incident involving activation blockers.

AdSense And Policy Fit

This checklist supports AdSense-safe publishing because it improves WordPress maintenance hygiene, source-note discipline, update planning, public-page stability, and rollback ownership without changing ad settings, encouraging artificial clicks, manufacturing traffic, making ranking guarantees, hiding disclosures, or using unsupported revenue claims. It helps keep a content site stable; it is not a monetization tactic.

Source Notes

• https://make.wordpress.org/core/2024/03/05/introducing-plugin-dependencies-in-wordpress-6-5/ checked 2026-06-14; used for source-derived analysis of WordPress 6.5 Plugin Dependencies, dependent and dependency terminology, the Requires Plugins header, circular dependency notices, and the WP_Plugin_Dependencies API surface.
• https://make.wordpress.org/core/2024/02/15/merge-announcement-plugin-dependencies/ checked 2026-06-14; used for source-derived analysis of dependency declaration, WordPress.org slug formatting, installation and activation requirements, deactivation and deletion constraints, and the lack of version management support in the header.
• https://developer.wordpress.org/plugins/plugin-basics/header-requirements/ checked 2026-06-14; used for source-derived analysis of plugin header fields, Requires at least, Requires PHP, Update URI, and Requires Plugins syntax.
• https://developer.wordpress.org/reference/classes/wp_plugin_dependencies/ checked 2026-06-14; used for source-derived analysis of the core class that handles plugin dependencies, dependency names, dependents, unmet dependencies, circular dependencies, and install-page handling.
• https://developer.wordpress.org/reference/functions/validate_plugin_requirements/ checked 2026-06-14; used for source-derived analysis of requirement validation for WordPress version, PHP version, and required plugin headers.
• https://wordpress.org/documentation/article/manage-plugins/ checked 2026-06-14; used for source-derived analysis of ordinary plugin management, installed plugins, activation, deactivation, updates, and automatic update controls.

No private WordPress dashboard, plugin setting, PHP file, staging site, production URL, WP-CLI command, database, server log, host panel, plugin vendor account, analytics property, Google Search Console property, Bing Webmaster Tools account, Google AdSense account, or payment setting was inspected for this article. If a future operator adds site-specific dependency evidence, keep that evidence private and narrow public claims to the verified environment.

Internal Link Notes

Link to wordpress-plugin-update-checklist when dependency review happens during an update window. Link to wordpress-plugin-conflict-troubleshooting-checklist when activation blockers are confused with ordinary plugin conflicts. Link to wordpress-site-health-review-checklist when WordPress, PHP, server, or HTTPS context matters. Link to wordpress-staging-site-checklist before changing an important plugin pair in production. Link to wordpress-php-version-upgrade-checklist when requirements mention PHP compatibility. Link to wordpress-backup-restore-checklist when rollback evidence is required before cleanup.

Update Log

Update note: review this checklist every 60 days. Recheck official WordPress Core plugin dependency notes, the Plugin Handbook header requirements page, WP_Plugin_Dependencies code reference, plugin requirement validation, and WordPress plugin management documentation. Refresh earlier after WordPress changes plugin dependency behavior, plugin header support, dependency UI, activation handling, circular dependency notices, or plugin management screens.