docs: add changelog for aud31-sep13

changelog.mdx

@@ -5,6 +5,50 @@
 noindex: true
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+<Update label="August 31 - September 13" tags={["New releases", "Improvements"]} rss={{ title: "Weekly Updates", description: "AI 404 suggestions, assistant web search with external sources, security enhancement, and reliability fixes" }}>
+
+## Major releases
+
+- **Major enhancement**: AI suggested pages on 404 pages, [when someone hits a dead link → AI agent reads the path → suggests semantically similar pages](https://x.com/mintlify/status/1966625627773059495)
+- **Major release**: web search for assistant can now include external sources  
+  _Note: Contact us to enable this feature for your site._
+
+## Assistant and MCP
+
+- Fixed a bug where the assistant would be incorrectly rate limited due to time window not sliding correctly
+- Fixed a bug with assistant tool calling to properly handle empty `text` blocks
+- Fixed a bug where MCP server name's concatenated with tool calls were sometimes exceeding the 60 character length MCP clients enforce
+- Fixed a bug where the assistant menu would have a height several times larger than the viewport and scroll forever
+- Fixed a bug where assistant spend values could display with greater than two decimal places in the dashboard
+
+## Web editor and deployments
+
+- Security enhancement added to editor such that only users with `write permissions` for the connected git hosting repository can make changes
+- Fixed a bug where preview deployments wouldn't work for branches with `=` in the name
+- Fixed a bug where long branch names would overflow modals on preview deployment creations
+- Quality of life improvement where email query parameter will prefill the input on signup invitations
+- Fixed a bug where copying a page from the context menu was not working on safari 
+
+## API playground and navigation
+
+- Multiple API playground response codes now display in a controlled styled select menu instead of the system default select menu when focused
+- You can now use the [`expanded` field on navigation groups in your `docs.json` to make them be default open](https://mintlify.com/docs/navigation#default-expanded-state)
+
+## SEO and UI
+
+- Fixed a bug where favicons were not showing up in search engines by serving them from the same URL as the documentation site itself for each respective site
+- Fixed a bug where youtube embeds would flash in and out on load
+- Fixed a bug where expanding the feedback menu to include written responses would cause layout shift with the table of contents
+- Fixed a bug where text would leak above the topbar on the maple theme when a dismissed the notification banner
+- Enhanced the Maple and Willow themes by adding login/logout buttons to the sidebar for easier access 
+
+## Analytics and exports
+
+- Fixed reliability issues with assistant analytics view and exports
+- Assistant analytics exports are now executed in the background and sent via email for a more reliable experience
+
+</Update>
+
 <Update label="August 24 - August 30" tags={["Improvements"]} rss={{ title: "Weekly Updates", description: "Enhanced feedback collection, navigation improvements, and authentication bug fixes" }}>
 
 ## Major release: Enhanced feedback collection
@@ -26,7 +70,7 @@
 - Fixed a bug where Google was indexing raw `*.md` files because they were missing a `x-robots-tag noindex` header
 - Fixed a bug with OAuth on protected docs where it wouldn't redirect you back to your starting page once you completed the flow successfully
 - Fixed a bug on previews of auth protected docs where you weren't able to see the entire navigation bar
 - Bug fixes to how SVGs are handled with our new image CDN  
 
 ## Component and styling enhancements
 
@@ -35,7 +79,7 @@
 
 ## Performance improvements
 
 - Performance improvement by moving the KaTeX CSS from cdnjs to our own CDN on Cloudfront for reduced latency
 
 </Update>
 
@@ -75,11 +119,11 @@
 
 ## Performance and build optimizations
 
 - MDX transpilation now happens at deployment time instead of on every page load in uncached NextJS serverless environments, improving time to first byte for uncached pages.
 - Content-based hashing prevents re-transpilation when MDX hasn't changed, reducing update workflow times by ~50% for customers with large page counts (deployments over 5 minutes should be roughly halved)
 - Preview deployment viewing in the dashboard is now faster with added database indexes and query parallelization in our backend
 - Reduced page size by eliminating duplicate `navigation` data in each page's `rsc` payload—performance gains most noticeable with high page counts or complex navigation structures
 - More aggressive prefetching enables instant page loads more frequently
 
 ## API playground and OpenAPI enhancements
 
@@ -94,7 +138,7 @@
 - File creation/renaming now saves changes when clicking away instead of requiring Enter key press
 - Fixed branch navigation where changing URL to specific branch would redirect to last active branch instead of intended destination
 - Properly URL encode branch titles containing `/` to prevent navigation breakage
 - Fixed `Ctrl+K` link shortcut in monorepo dashboard Editor that was prepending docs repo path and creating broken links
 
 ## Analytics and LLM integrations
 
@@ -105,7 +149,7 @@
 
 ## Component and styling enhancements
 
 - Support for custom classnames in `h{1-4}` tags for applying custom heading styles
 - Fixed `h{1-4}` tags rendering as `Heading` components with chips in custom page mode
 - Added CSS selectors to [breadcrumbs](/navigation#breadcrumbs) for custom CSS targeting
 - Fixed stretched open-graph images by analyzing dimensions to maintain proportions at 56px height
@@ -116,9 +160,9 @@
 
 - Fixed PDF render issues with certain page titles by sanitizing characters that cause generation problems
 - Resolved CLI error `Cannot convert undefined or null to object` when encountering empty OpenAPI JSON files
 - Fixed custom `docs.json` open-graph metatags being overwritten by generated ones
 - Fixed RSS feed button clicks when landing on anchor links by using origin + pathname for RSS links
 - Improved CLI download speed by removing sourcemaps
 
 ## Technical improvements
 
@@ -135,7 +179,7 @@
   - Support [`logoutURL` in OAuth configuration](https://mintlify.com/docs/authentication-personalization/authentication-setup#implementation-3) to delete upstream cookies and complete sign-out
   - On OAuth errors, users are redirected to your specified `logoutURL` to restart the auth flow
   - Fixed a flash of a 500 error during OAuth/JWT flows before the callback
   - Auto-strip `https://` from URLs in OAuth/JWT auth configuration to prevent misconfiguration
 
   ## API playground enhancements
 
@@ -152,7 +196,7 @@
   ## Performance and reliability
 
   - All image and video assets present in your docs repo are now served at the appropriate path on your domain. For example, if you have `/assets/marketing/my-logo.png` in your repo, it will be available at `https://mydocsurl.extension/assets/marketing/my-logo.png`.
   - Email field on login for the Mintlify dashboard now autofocuses so you can start typing immediately _(quality of life improvement)_
   - Both custom domains and subdomains in Redis for a performance improvement on navigation load times (~50ms latency reduction)
   - Added retry logic for PDF exports to improve reliability
   - Fixed cookie consent popup reappearing after acceptance or dismissal—first selection is now respected
@@ -160,7 +204,7 @@
 
   ## Technical improvements
 
   - CLI bugfixes for windows and pnpm, plus CI tests to prevent regressions
   - Improved error logging output—a quality of life upgrade for our engineering team when debugging
   - Minor fixes to the broken-link CI action when `contentDirectory` files are missing
   - Fixed a regression caused by the auth-protected preview fixes from last week where the active tab was not being set correctly in the navigation UI
@@ -191,7 +235,7 @@
 
   ## Performance and reliability
 
   - Made search feel more crisp and accurate by aborting debounced requests as you type
   - Resource provisions for a new CDN - expect image asset and page load times to improve soon
   - Fixed bugs for rendering complex Mermaid diagrams like GANTT charts
   - Fixed CLI bugs on Windows to improve stability and added tests to prevent regression
@@ -199,7 +243,7 @@
   ## Technical improvements
 
   - Added OpenTelemetry for traces in NextJS application to improve time to first byte for customers
   - Migrated from Octokit to GitHub API Client to improve latency in the web editor experience
   - Fixed duplicate meta tags for OpenGraph
   - Upgraded MongoDB from version 6 to 7 for improved performance and new features
 </Update>
@@ -207,7 +251,7 @@
 <Update label="July 2025" tags={["New releases", "Improvements"]} rss={{ title: "July Product Updates", description: "Slack app integration, hosted MCP servers, Cursor integration, and performance improvements" }}>
   ## Slack app
 
   - Zero friction access: Bot responds to DMs, @mentions, and any question in your `#ask-ai` channel
   - One-click setup: Install directly from your Mintlify dashboard in seconds
   - Contextual answers: Searches your entire documentation to provide relevant, accurate responses
   - Deflect support interruptions: Turn daily questions into instant, self-serve answers
@@ -226,17 +270,17 @@
   - Added more customization options including focus mode, expandable code blocks, dark and light mode responsiveness, language dropdown menu, line numbering, and icons
 </Update>
 
 <Update label="June 2025" tags={["New releases", "Improvements"]} rss={{ title: "June Product Updates", description: "AI assistant updates and subscribable changelogs" }}>
   ## AI assistant updates
 
   - Improved accuracy through agentic RAG with tool calling
   - Provides navigable links to referenced pages so that users can go directly to the source of answers
   - Copy shortcut for code examples generated by assistant
   - "Ask AI" shortcut on code blocks in documentation to generate explanations from the assistant
 
   Learn more in the [assistant docs](/guides/assistant).
 
   ## Subscribable changelogs
   - Automatically generate an RSS feed from changelog pages
   - Integrate RSS-enabled updates with Slack, email, and other tools
 
@@ -323,7 +367,7 @@
   - Improved styling nits for dashboard border for mobile-tablet-desktop responsiveness
   - Show code examples even when in simple mode for API playground
   - Support "command \+ k" shortcut for search in web editor
   - Codeblocks within callouts expand to fill the width of the callout area
 </Update>
 
 <Update label="February 2025" tags={["New releases", "Improvements"]}>
@@ -354,9 +398,9 @@
 
   Automatically lint your docs to find broken links, discover spelling and grammar issues, or enforce writing styles with your own Vale config. Learn more in our [docs](settings/ci).
 
   ## .md support for LLMs
 
   All documentation pages are now automatically available as plain Markdown files—just append `.md` to the URL. This makes it easier for LLMs to ingest individual pages from your documentation.
 
   ## More Themes
 
@@ -438,7 +482,7 @@
   <Frame>
     ![llms.txt support](/images/changelog/llms.jpg)
   </Frame>
   All docs instances are now automatically hosted at /llms.txt and /llms-full.txt so that LLMs can easily ingest your documentation. For more information, read the [docs on the new llms.txt standard.](https://llmstxt.org)
 
   ## Localization
 
@@ -510,7 +554,7 @@
   ## Dashboard Improvements
 
   - Added ability to change custom domain to be /docs directly through dashboard settings.
   - Consolidated the login and signup pages to decrease friction and confusion.
   - Implemented the discovery login flow so that users that are members of multiple organizations can now switch between them.
   - Added login with Google OAuth
   - Added ability to add new deployment through dashboard settings.
@@ -524,7 +568,7 @@
   - Don't allow search engines to crawl user-auth protected pages.
   - Revalidate the cache when an org is deleted.
   - We now use the Scalar OpenAPI parser to parse OpenAPI definitions which improves the performance, fixes parsing issues, and surfaces better error messages.
   - Top-level descriptions are now supported in API reference pages autogenerated from OpenAPI definitions.
   - Add in-line-style support for icons
   - Fixed the pop-in of custom CSS in docs.
   - Properly show in-line code styling in conjunction with links.
@@ -557,7 +601,7 @@
   <Frame>
     ![SEO Improvements](/images/changelog/seo-improvements.jpeg)
   </Frame>
   We've fixed  both the mobile and desktop layout of our docs so that they are more SEO-friendly - including adding proper aria tags to navbar and toggle elements.
 
   ## Dashboard Improvements
 
@@ -591,7 +635,7 @@
 
   ## File Uploads in API Playground
 
   By default, API playground requests are proxied by Mintlify. Now you can use
   `disableProxy` to disable this behavior and support request types like file
   uploads.
 
@@ -624,7 +668,7 @@
   </Frame>
   For `Pro` users, we introduced Mintlify Widget, an extension of your docs to
   answer your users' questions when and where they asked. You can add this
   AI-powered chatbot to any web page: your landing page, inside your product, or
   on your existing documentation pages.
 
   - [Read the blog announcement](https://mintlify.com/blog/widget)
@@ -659,7 +703,7 @@
 <Update label="May 2024">
   ## Okta SSO
 
   We now support sign-on via Okta SAML and OIDC.
 
   ## Mintlify REST API
 
@@ -682,7 +726,7 @@
 <Update label="March 2024">
   ## Mintlify MDX for VSCode
 
   Call snippets of our pre-built components and callouts without leaving VSCode. [Install the extension here](https://marketplace.visualstudio.com/items?itemName=mintlify.mintlify-snippets).
 </Update>
 
 <Update label="February 2024">
@@ -691,7 +735,7 @@
   - Dashboard upgrades: view update logs to see what's changed and status of an update, toggle between Mintlify projects to manage deployments
   - Versioning with tabs fully supported
   - Wildcard redirects now supported
   - CLI Error Detection: we now show the position of invalid frontmatter when there are parsing issues during local development
 </Update>
 
 <Update label="January 2024">