WordPress 6.6 compatibility

[jeherve]

WordPress 6.6 is set to release on 16 July 2024.

• Planning: make.wordpress.org/core/6-6

Let's use this issue to keep track of anything that may come up until then.

Tasks

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1. General: indicate compatibility with upcoming WP 6.6 #37962
   [Plugin] Automattic For Agencies Client [Plugin] Backup [Plugin] Boost [Plugin] CRM [Plugin] Classic Theme Helper Plugin [Plugin] Inspect [Plugin] Jetpack [Plugin] Migration [Plugin] Protect [Plugin] Search [Plugin] Social [Plugin] Starter Plugin [Plugin] Super Cache [Plugin] VaultPress [Plugin] VideoPress [Tools] Development CLI [Type] Janitorial +17
   
2. Editor plugins: do not load post editor plugins in site editor #37819
   [Extension] AI Assistant Plugin [Extension] Post Publish QR Post Panel [Extension] SEO [Extension] Social Previews [Focus] FSE [Plugin] Jetpack [Pri] Normal [Status] Blocked / Hold [Type] Janitorial +9
   
3. Site Editor: do not display Jetpack sidebar panels when not needed #37949
   [Extension] AI Assistant Plugin [Extension] Post Publish QR Post Panel [Extension] SEO [Extension] Social Previews [Focus] FSE [Plugin] Jetpack [Pri] Normal [Type] Bug +8
   
4. Contact Form: move away from onSplit prop #38031
   [Feature] Contact Form [Pri] Normal [Type] Bug +3
   
5. Carousel: replaced image in synced image block within pattern is not replaced in Carousel #38081
   Triaged [Feature] Carousel [Focus] FSE [Plugin] Jetpack [Pri] Low [Type] Bug +6

And in the next plugin release in August , to give folks time to update:

Tasks

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1. General: update WP version requirements to WordPress 6.5 #38382
   Actions [Plugin] Automattic For Agencies Client [Plugin] Backup [Plugin] Classic Theme Helper Plugin [Plugin] Inspect [Plugin] Jetpack [Plugin] Migration [Plugin] Protect [Plugin] Search [Plugin] Social [Plugin] Starter Plugin [Plugin] Super Cache [Plugin] VideoPress [Plugin] Wpcomsh [Pri] Normal [Tools] Development CLI [Type] Janitorial +17
   
2. General: remove backwards-compatible code for versions < 6.5 #38386
   Admin Page RNA [Block] Paid Content [Block] Sharing Button [Block] Subscriber Login [Block] Subscriptions [Extension] AI Content Lens [JS Package] Components [Package] Jetpack mu wpcom [Plugin] Jetpack [Plugin] Wpcomsh [Pri] Normal [Tests] Includes Tests [Tools] Development CLI [Type] Janitorial +15
   
3. AI Excerpt: switch to using the PluginPostExcerpt Slot Component #36317
   [Extension] AI Content Lens [Pri] Normal [Type] Janitorial +3
   
4. External Media: support editor changes in WordPress 6.5 #36188
   [Extension] External Media [Plugin] Jetpack [Pri] Normal [Type] Janitorial +4
   
5. Plugin configuration: missing redirect on activation #36844
   Customer Report General Triaged [Plugin] Automattic For Agencies Client [Plugin] Backup [Plugin] Boost [Plugin] CRM [Plugin] Jetpack [Plugin] Protect [Plugin] Reach [Plugin] Search [Plugin] Social [Plugin] VideoPress [Pri] Normal [Type] Bug +15
6. WP 6.6: move from Post Editor to Site Editor versions of Utilities #37713
   [Focus] Blocks [Focus] FSE [Pri] Normal [Type] Janitorial +4
7. React 19 compatibility #37951
   12 of 12
   Epic General [Type] Janitorial +3
   
8. Comments / Subscriptions: change default cookie expiration from 30000000 to YEAR_IN_SECONDS #38027
   [Feature] Comments [Feature] Subscriptions [Pri] Low [Type] Good First Bug [Type] Janitorial +5
9. WordPress.com REST API: consider supporting AVIF as a supported media type #38029
   [Feature] WPCOM API [Pri] Normal [Type] Janitorial +3
   
10. Form Block: pattern picker broken in WordPress 6.6 #38405
    Triaged [Block] Contact Form [Feature] Contact Form [Plugin] Jetpack [Pri] Normal [Type] Bug +6
    
11. Miscellaneous developer changes in WordPress 6.6
12. Updates to the HTML API in 6.6
13. Miscellaneous Editor changes in WordPress 6.6
14. Internationalization improvements in 6.6
15. Section Styles

Once WordPress 6.6 is the minimum required version in Jetpack, we can consider implementing the following changes:

Tasks

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1. Remove backwards-compatible code managed in WP 6.6: move from Post Editor to Site Editor versions of Utilities #37713
2. Support any changes to the plugin onboarding flow (trac ticket)
3. Janitorial: drop support for PHP 7.0 and 7.1 #38296
   7 of 7
   Epic General [Type] Janitorial +3
   

In addition to the above, we can follow the dev-notes that will drop here about the release:
make.wordpress.org/core/tag/dev-notes+6-6

You can also consult the 1X5DEhafI9pVhddNYNHUFFSIpsl1t2b2swgr1nmsmEFE-gdoc for the release.

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For reference: prior art for WordPress 6.5 compat: #33615