Update maintenance plans

source/what-we-do/index.html.md.erb

@@ -9,28 +9,49 @@ We maintain the GOV.UK Design System and related tools.
 
 ## Our products
 
-### Actively maintained
+### Actively developed
 
 - [GOV.UK Design System Website] - guidance for making government services consistent with GOV.UK. The code is maintained in the [govuk-design-system GitHub repository].
 - [GOV.UK Frontend] - a code library of GOV.UK Design System components.
 - [GOV.UK Frontend Docs] - Technical documentation for installing and using GOV.UK Frontend. The code is maintained in the [govuk-frontend-docs GitHub repository].
 - [Community backlog] - a backlog of user-submitted component and pattern suggestions for inclusion into the Design System.
 - [stylelint-config-gds] - a stylelint configuration for SCSS and CSS files across GDS.
 
-### Security patches only
+### Maintenance
 
-- [Accessible Autocomplete] - a component that helps users choose answers from a provided list
+#### Accessible Autocomplete
+
+The GOV.UK Design System team maintains the [Accessible Autocomplete] as a standalone component. However, we’re only able to put in minimal work to support it.
+
+[Read about our plans to maintain this component](https://github.com/alphagov/accessible-autocomplete/issues/532).
+
+[Read more about the types of support we can provide](https://github.com/alphagov/accessible-autocomplete/issues/430).
+
+#### GOV.UK Prototype Kit
+
+The [GOV.UK Prototype Kit] is currently maintained by the GOV.UK Design System team. Huge thanks to the GOV.UK Prototype team, who’s hard work has made our job of maintaining the Prototype Kit much easier.
+
+We will:
+
+- update dependencies and address serious bugs
+- review bugs and dependencies every 3 months (serious bugs will be given high priority)
+
+We cannot:
+
+- provide user support on Slack, GitHub or via email
+- add new features
+- review contributions
+- update documentation
+- address smaller functionality issues that do not block usage
+
+Many departments told us about documentation and support for the Prototype Kit which was provided internally, so we encourage users to seek help from their colleagues.
 
 ### Legacy products
 
 - [GOV.UK Elements]
 - [GOV.UK Frontend Toolkit]
 - [GOV.UK Template]
 
-### No longer supported
-
-- [GOV.UK Prototype Kit] - The GOV.UK Prototype Kit team is responsible for maintenance and support.
-
 [Accessible Autocomplete]: https://github.com/alphagov/accessible-autocomplete
 [Community backlog]: https://design-system.service.gov.uk/community/backlog/
 [GOV.UK Design System website]: https://design-system.service.gov.uk/