docs: clarify Abilities API is core in 6.9+ (fixes #150)

[mathetos]

Summary

Some docs still read like you need a separate Abilities API install. README.md was mostly updated in #165 and #204, but readme.txt and the getting-started guides were still Composer-first and pretty quiet about core.

This PR lines those up: says plainly that Abilities API ships with WordPress 6.9+, matches install docs to README (plugin first, Composer for plugin devs), and tightens the admin notice when core is too old.

Closes #150

What changed

• README.md: one line in Dependencies
• readme.txt: plugin-first install wording
• docs/getting-started/README.md and installation.md: same story, flipped order
• common-issues.md + Plugin.php: clearer "you need WP 6.9+" messaging

Test plan

• Read-through for stale abilities-api / composer require references
• Maintainer eyeball on install doc ordering

[github-actions]

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 87.86%. Comparing base (90252e7) to head (27e46a0).

Files with missing lines	Patch %	Lines
includes/Plugin.php	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##              trunk     #223   +/-   ##
=========================================
  Coverage     87.86%   87.86%           
  Complexity     1245     1245           
=========================================
  Files            53       53           
  Lines          4037     4037           
=========================================
  Hits           3547     3547           
  Misses          490      490           

Flag	Coverage Δ
unit	87.86% <0.00%> (ø)

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[mathetos]

Quick note on the failing codecov/patch check: this PR is mostly docs, but it also tweaks one admin-notice string in includes/Plugin.php. Patch coverage wants a test to execute that line, and we do not have one for the missing-Abilities-API path. Everything else is green (full PHPUnit matrix, PHPCS, PHPStan, Plugin Check, codecov/project).

I would treat the patch failure as noise here rather than block merge. Happy to drop the Plugin.php line in a follow-up if you prefer docs-only PRs for codecov hygiene, or add a small test if you want patch green instead.

[justlevine]

Happy to drop the Plugin.php line in a follow-up if you prefer docs-only PRs for codecov hygiene

Less about the hygiene (changelog here isnt automated yet), and more that we can approve/merge that string change in Plugin.php in a few minutes. There's a lot of slop in the existing docs that requires a real sit-down to confirm this closes #150 . Up to you.

[mathetos]

I can definitely take a more comprehensive look at the whole codebase tomorrow.

…

On Wed, Jun 24, 2026, 11:41 PM Dovid Levine ***@***.***> wrote: *justlevine* left a comment (WordPress/mcp-adapter#223) <#223 (comment)> Happy to drop the Plugin.php line in a follow-up if you prefer docs-only PRs for codecov hygiene Less about the hygiene (changelog here isnt automated yet), and more that we can approve/merge that string change in Plugin.php in a few minutes. There's a lot of slop in the existing docs that requires a real sit-down to confirm this closes #150 <#150> . Up to you. — Reply to this email directly, view it on GitHub <#223?email_source=notifications&email_token=AAHDHJENCQX3CB63MTLMGXD5BRDJVA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINZZGM4TCMRZHE3KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-4793912996>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAHDHJDCEZ54HJ3V7CIRYEL5BRDJVAVCNFSNUABGKJSXA33TNF2G64TZHMYTAMJXGIYDSMJUGE5US43TOVSTWNBXGM4DKNBRHE2DBILWAI> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/AAHDHJAZ6CAXL56NLM6QS4D5BRDJVA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINZZGM4TCMRZHE3KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android <https://github.com/notifications/mobile/android/AAHDHJFAFWFLR7OGRA2TKKL5BRDJVA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINZZGM4TCMRZHE3KM4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>