wp-site-health-auditor

WP Site Health Auditor

When to Use This Skill

• The user pastes a WordPress Site Health report (Tools > Site Health), as text or screenshot
• The user pastes raw Site Health debug info (Tools > Site Health > Info) and asks what's wrong
• The user mentions "site health", "recommended improvements," or "critical issues" for a WordPress site
• The user asks to clean up, harden, or speed up a WP install based on that screen

Turns a WordPress Site Health report (Critical issues / Recommended improvements / Passed tests) into a prioritized, risk-tiered fix plan — then executes the safe fixes and hands off the rest with exact commands or code.

⚠️ Safety — read before touching any file

This skill edits wp-config.php, .htaccess, and php.ini-equivalent settings, and deletes plugins and themes. All three are one bad edit away from a white-screen-of-death or a broken upload path. Never skip this section, even for a one-line change, even if the user is in a hurry.

Before any edit or deletion, in this order:

1. Back up the specific file(s) you're about to touch, not just "have a backup somewhere":

   cp wp-config.php wp-config.php.bak-$(date +%Y%m%d-%H%M%S)
   cp .htaccess .htaccess.bak-$(date +%Y%m%d-%H%M%S)
   

   If shell access isn't available, tell the user to download the current file via SFTP/host file manager first, and don't proceed until they confirm they have it.
2. Confirm a full site/database backup exists before deleting any plugin or theme, or running wp search-replace. If the user doesn't have one and has a backup plugin active (UpdraftPlus, etc.), trigger a backup first: wp updraftplus backup or the plugin's own WP-CLI command, or tell them to click "Backup Now" and wait for confirmation before continuing.
3. Never run wp search-replace without --dry-run first, and always show the dry-run output to the user before running it for real. This command rewrites the database in place — a wrong pattern can corrupt serialized data across every table it touches.
4. After any PHP file edit, lint it before reloading the site:

   php -l wp-config.php
   

   For .htaccess changes, run apachectl configtest if available, or check the site immediately. A syntax error in wp-config.php takes the entire site down immediately. Do not skip the lint check to save a step.
5. Change one thing at a time, then verify the site still loads (homepage + wp-admin) before making the next change. Don't batch multiple Tier 2 file edits into one pass — if something breaks, you want to know which change did it.
6. Give the user the exact rollback command alongside every edit:

   cp wp-config.php.bak-<timestamp> wp-config.php
   

   State this even if nothing goes wrong — it costs one line and saves a panicked user later.

If the user says "just do it, skip the backup" — still create the backup silently as part of the edit sequence and tell them you did. Refuse to skip step 1 or step 4 entirely; those two are non-negotiable regardless of urgency, since the failure mode (corrupted wp-config.php, dead site) is worse than the ten seconds a backup costs.

Overview

The Site Health screen is diagnostic, not prescriptive. It tells the site owner that something is wrong (e.g. "you should use a persistent object cache") but not how to fix it, and it mixes items that are one-click-safe (deactivate a plugin) with items that require host-level changes (php.ini, object cache backend) or are purely informational (SQL server version — no action needed). This skill sorts that out — safely.

Phase 1 — Parse the report

Input is usually one of:

• Pasted plain text copied from Tools > Site Health (Status tab)
• Pasted plain text from Tools > Site Health > Info (the debug data export)
• A screenshot of the Status tab
• WP-CLI output (wp site-health check is not a core command; note that up front, don't invent one — see Phase 4)

Extract three buckets exactly as WordPress labels them:

1. Critical issues (red) — always fix first, always confirm before touching.
2. Recommended improvements (yellow) — the bulk of real work; triage by risk tier below.
3. Passed tests (green) — skip. Do not "fix" or re-verify passed tests unless the user asks. Do not invent problems with green items — a common failure mode is treating "SQL server is up to date" as something to act on. It isn't.

If the report is a screenshot, transcribe item titles + category tags (Security/Performance/SEO/Privacy) verbatim before triaging — don't paraphrase the WordPress-generated title, it's used for the fix lookup in Phase 3.

If no report was pasted and the user just says "audit my site health," ask them to paste the Status tab text (fastest) rather than guessing — Site Health results are host- and config-specific and guessing wastes a turn.

Phase 2 — Risk-tiered triage

Classify every non-passed item into one of three tiers before touching anything. Present this triage table to the user first for anything above Tier 1 count of 3+ items — don't silently start deactivating plugins.

Tier 1 — Safe, reversible, auto-fixable in wp-admin or via WP-CLI No data loss risk, no downtime, fully reversible. Still back up per the Safety section before deleting anything. Fix directly once the user confirms the item list.

• Remove inactive plugins/themes (they aren't running, deactivation already happened — this is just deletion of dead code)
• Turn off WP_DEBUG display in production (WP_DEBUG_DISPLAY, not WP_DEBUG itself if the user still wants logging)
• Enable search engine indexing / fix robots visibility toggle
• Update the site tagline off "Just another WordPress site"

Tier 2 — Requires host/server-level access — Claude drafts the change, user or host applies it Cannot be fixed purely from wp-admin; needs php.ini, .htaccess, wp-config.php, or hosting panel access. Draft the exact snippet, explain where it goes, remind the user of the backup + lint steps above, and flag that a server restart or host support ticket may be needed.

• Permalink structure change (migration — existing URLs break without redirects; require a redirect plan and CDN/cache flush before applying)
• post_max_size < upload_max_filesize mismatch
• Persistent object cache not available (Redis/Memcached)
• Page cache not detected
• PHP version/module changes
• HTTPS/SSL configuration
• Loopback/REST API failures caused by firewall or security plugin blocking

Tier 3 — Informational / host-dependent, no fix exists or none needed Report as informational only. Do not attempt a fix, do not suggest one unless directly asked.

• SQL server version notices when already current
• "Autoloaded options are acceptable" type passed-adjacent info
• Anything already green in Passed tests

Phase 3 — Fix recipes by item

Match the WordPress-generated item title (case-insensitive substring match is fine) to a recipe below. Every recipe below assumes the Safety section has already been followed for that file. If an item doesn't match anything here, say so explicitly rather than fabricating a fix — Site Health's item set changes across WP core versions and this list isn't exhaustive (see references/catalog.md for the fuller list including rarer items).

You should remove inactive plugins / themes — Tier 1

# confirm full site backup exists first (Safety step 2)
wp plugin list --status=inactive --field=name
wp plugin delete <plugin-slug>

wp theme list --status=inactive --field=name
wp theme delete <theme-slug>

Never delete the currently active theme's parent if the active theme is a child theme. Never delete Twenty Twenty-Five (or the current default core theme) if it's the only fallback theme — WordPress needs at least one broken-theme fallback; recommend keeping one bundled default even if inactive. Confirm the exact plugin/theme names with the user before deleting — inactive isn't the same as unused; some plugins are intentionally kept inactive as a staged rollback.

post_max_size smaller than upload_max_filesize — Tier 2

This breaks large file uploads (post data gets truncated before the file size limit is even reached). Fix by raising post_max_size to be >= upload_max_filesize, typically with headroom for form overhead.

Where to set it (pick whichever the host supports, in this order of preference):

1. Host control panel PHP settings (cPanel "Select PHP Version" > Options, Plesk, etc.) — no code needed, safest option, skip the file-backup steps entirely.
2. php.ini (if the user has server access) — back up first (cp php.ini php.ini.bak-<timestamp>):

   upload_max_filesize = 64M
   post_max_size = 128M
   

3. .htaccess (Apache + mod_php only, not on PHP-FPM/nginx) — back up first:

   php_value upload_max_filesize 64M
   php_value post_max_size 128M
   

   A malformed .htaccess directive can 500 the entire site. Run apachectl configtest if available before reloading, or check the live site immediately after saving.
4. .user.ini (CGI/FastCGI hosts; not mod_php) — back up first, create or edit .user.ini in the WordPress root:

   upload_max_filesize = 64M
   post_max_size = 128M
   

   ⚠️ Do not use ini_set() in wp-config.php for these directives — upload_max_filesize and post_max_size are PHP_INI_PERDIR, which means they can only be set before the request starts (php.ini, .htaccess, .user.ini). ini_set() calls silently fail for both, leaving the problem unfixed.

Always set post_max_size strictly greater than upload_max_filesize. Confirm the current values first (wp cli info doesn't show these — check phpinfo() or the host panel) rather than assuming defaults.

You should use a persistent object cache — Tier 2

Requires a caching backend (Redis or Memcached) installed at the server level — this is not something a plugin alone can create out of nothing.

1. Confirm with the user's host whether Redis or Memcached is available (many managed WP hosts include one).
2. If available, install a drop-in client plugin: Redis Object Cache or WP Redis (Redis), or Memcached Object Cache (Memcached). wp plugin install redis-cache --activate then wp redis enable. This writes an object-cache.php drop-in to wp-content/ — confirm no existing object-cache.php is being overwritten (check first with ls wp-content/object-cache.php); if one exists, back it up before enabling.
3. If not available, this is a hosting-tier limitation — report it as such rather than trying to fake a fix; don't recommend switching hosts unprompted, just flag it as the blocker.

Page cache is not detected — Tier 2

1. Check if the host provides server-level page caching (many managed WP hosts do, and it may already be active but not reporting the headers Site Health looks for — worth confirming with the host before installing a redundant plugin).
2. If not, install one page-cache plugin (not a full plugin stack) — WP Super Cache, W3 Total Cache, or the host-recommended one. wp plugin install wp-super-cache --activate then enable caching from its settings screen (no reliable WP-CLI toggle across cache plugins — flag manual step to user).
3. Avoid stacking two caching plugins; if one is already active but not detected, check the plugin's own status page before adding another. Some cache plugins also write rules into .htaccess — back it up first per the Safety section before activating.

Your site is not set to output debug information — usually already passing; if failing — Tier 1

Back up wp-config.php first, lint after editing:

// wp-config.php
define( 'WP_DEBUG', false );         // set to true only while actively debugging
define( 'WP_DEBUG_DISPLAY', false ); // never show errors to visitors
define( 'WP_DEBUG_LOG', true );      // logs to wp-content/debug.log instead

REST API / loopback requests / background updates failing — Tier 2

Usually a security plugin, firewall, or .htaccess rule blocking internal requests. Steps:

1. Temporarily deactivate security/firewall plugins one at a time, re-check Site Health after each.
2. Check hosting-level firewall (Cloudflare, Sucuri, host WAF) isn't blocking the site from calling itself.
3. Verify wp-config.php doesn't have define('DISALLOW_FILE_MODS', true) set incorrectly for background updates specifically, if that's the failing item. Back up before removing/editing that line.

HTTPS not fully active — Tier 2

wp option get siteurl
wp option get home

Both must be https://. Also check for mixed-content (http:// hardcoded in content/theme). Confirm a full database backup exists, then dry-run before applying for real:

wp search-replace 'http://olddomain.com' 'https://olddomain.com' --dry-run

Only remove --dry-run after the user has reviewed the dry-run output and confirmed the replacement count and matched rows look correct.

Phase 4 — What NOT to invent

• There is no wp site-health WP-CLI command in WordPress core as of this writing — don't fabricate one. Fixes are applied via the specific commands above, not a single audit-and-fix CLI call.
• Don't claim a fix is complete without the user (or a re-run of Site Health) confirming it — server-level changes (Tier 2) especially can silently fail to apply depending on host restrictions.
• Don't guess PHP/server values (current upload_max_filesize, cache backend availability, etc.) — ask or have the user check phpinfo() / host panel rather than assuming common defaults are in place.
• Don't skip or shortcut the Safety section for any reason, including "it's a small change" — file corruption risk doesn't scale with edit size; a single dropped semicolon in wp-config.php is as fatal as a large edit.

Phase 5 — Output format

Give the user:

1. Triage table: item | category | tier | one-line fix summary
2. Tier 1 fixes: execute directly (with confirmation + backup for deletions), show before/after
3. Tier 2 fixes: exact snippet + exactly where it goes + backup command + lint/verify command + rollback command + note that a host restart or support ticket may be required; don't mark these "done" until the user confirms the site still loads
4. Tier 3 / unrecognized items: one line each, informational only
5. Recommend re-running Site Health after Tier 1/2 changes to confirm the yellow items clear.

Keep the whole response scannable — this is a punch list, not an essay. Use the table + short recipe blocks above, not prose paragraphs, unless the user asks for more explanation on a specific item.

Examples

Example: Site Health reports "You should use a persistent object cache"

1. Triage → Tier 2 (requires Redis/Memcached at server level)
2. Ask the user to check with their host whether Redis is available
3. If yes, run:

   wp plugin install redis-cache --activate
   wp redis enable
   

4. Verify: ls wp-content/object-cache.php exists
5. Re-run Site Health to confirm the item clears

Example: Site Health reports "Your site is not set to output debug information"

1. Triage → Tier 1 (safe, reversible via wp-config.php)
2. Back up wp-config.php:

   cp wp-config.php wp-config.php.bak-$(date +%Y%m%d-%H%M%S)
   

3. Edit and lint:

   define( 'WP_DEBUG', false );
   define( 'WP_DEBUG_DISPLAY', false );
   

4. Verify php -l wp-config.php passes
5. Confirm the site homepage + wp-admin still load

Best Practices

• ✅ Back up the specific file before every edit — cp takes seconds, restoring a dead site takes hours
• ✅ Change one thing at a time and verify the site loads between each change
• ✅ Always run php -l after editing wp-config.php before reloading the site
• ✅ Run wp search-replace with --dry-run first and show the output to the user
• ❌ Never batch multiple Tier-2 file edits into one pass — you won't know which change broke the site
• ❌ Never skip the backup step, even for a one-line comment change

Reference

references/catalog.md — extended list of less-common Site Health items (SEO category items like llms.txt generation, Privacy items, rarer Security items) with the same tier classification, for reports that include items not covered above.

Common Pitfalls

• Treating every yellow item as actionable — Some recommended improvements (e.g. persistent object cache) are host-level and may not be fixable. Always triage by tier before acting.
• Changing permalinks without a redirect plan — Flipping to "Post name" on an indexed site breaks every existing URL. Always plan 301 redirects first.
• Using ini_set() for upload limits — upload_max_filesize and post_max_size are PHP_INI_PERDIR; ini_set() silently fails. Use php.ini, .htaccess, or .user.ini instead.
• Skipping the dry-run on wp search-replace — A wrong pattern can corrupt serialized data. Never run it without --dry-run first.
• Installing two caching plugins — Stacking page cache plugins causes conflicts and obscure bugs. If one is already active but not detected, debug it rather than adding another.

Limitations

• Cannot execute anything itself against a live site — every WP-CLI/PHP snippet is drafted for the user or their host to run; this skill has no shell access to the user's actual server.
• Cannot verify current PHP/server values (upload limits, cache backend availability, HTTPS status) — relies on what the user reports back after checking phpinfo() or their host panel.
• Does not cover multisite-specific Site Health variations or WooCommerce-specific health checks; both add extra items this skill's recipe list doesn't include.
• The item catalog (main file + references/catalog.md) reflects WordPress core's Site Health checks as of mid-2026 — item titles/wording can change across core versions, so an unmatched item should be reported as unmatched, not force-fit to the closest recipe.
• Does not replace a full security audit or compromise scan — Site Health flags configuration hygiene issues, not signs that a site has already been broken into.

Related Skills

• @security-hardening — For deeper WordPress security audits beyond Site Health's surface checks
• @wp-performance — For targeted performance optimization after Site Health flags are resolved