> For the complete documentation index, see [llms.txt](https://docs.middle.app/middle-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.middle.app/middle-docs/release-notes/september-21-2026.md). # September 21, 2026 This page describes updates for September 21, 2026. ## Fan-out workflow triggers [Workflow Triggers on Activity](/middle-docs/product/accounts/workflow-triggers.md) can now trigger one workflow many times based on a single record update, using the new Fan-out Mode. This is helpful in situations where you have a record with a list of Foreign Keys nested within it, and you need to execute a workflow for each element in that nested list. For example, take the case of a membership management system that has a Membership with an array of user IDs it applies to (this would be represented in Middle as an array of Foreign Keys to Users, for example). Imagine we have a "User Update" workflow that syncs updated user data into a different system; you can now use Fan-out Mode to run that workflow once for every item in the array of users it applies to. ## Other updates Added several new automated Health Checks. Toggling off module features now more intelligently examines syncs that need to remain on. Fixed an issue where assisted variables could not be used within a module feature if there were two required app connections pointing to the same app. The attribute editor now always requires clicking "save," reducing the chance of accidental edits. Added navigate-away protection to several forms that lacked it, reducing chance of losing work. Streamlined module feature UI. Fixed a couple issues in workflow logic affecting arrays of foreign keys. Increased required timeout for actions used in [Real Time Workflows](/middle-docs/product/real-time-workflow-api.md) to 15 seconds (up from 8 seconds). Fixing a 500 error that could occur when looking at a record's related record tab. Allowing Actions used in a module feature's assisted variable step to restart one time (up from zero times), which should assist with Apps that have been coded to raise an AuthenticationChanged with a new auth dictionary (needed for certain apps that require lots of bearer token rotation). Fixing a crash of a worker that could occur if a Sync was toggled from a PK lookup interface type, with related records turned on, to a Recent Record interface type. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.middle.app/middle-docs/release-notes/september-21-2026.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.