Note: I have removed the Github repo.

Okay, I just solved this issue with the help of GPT 5.1. I had put the app intent into an App Intent Extension, when it should have just been located in the app itself. Once I moved the files to the main app and deleted the extension, everything worked as expected.

I read through that older thread you posted and updated my PoC app to stabilize the entity identifiers. They are now deterministic, no matter what the execution context is. However, I'm still getting no results in Visual Intelligence Search and the same errors in the console: error 09:45:45.698321-0600 duetexpertd Unable to create extension identity: Error Domain=LNConnectionErrorDomain Code=1100 "Unable to locate `com.hairlessape.VisualSearchForVI.VisualSearchAppIntent` for the `com.apple.appintents-extension` extension point" UserInfo={NSLocalizedDescription=Unable to locate `com.hairlessape.VisualSearchForVI.VisualSearchAppIntent` for the `com.apple.appintents-extension` extension point} error 09:45:45.698338-0600 duetexpertd [com.hairlessape.VisualSearchForVI.VisualSearchAppIntent] No extension process: Error Domain=LNConnectionErrorDomain Code=1100 "Unable to locate `com.hairlessape.VisualSearchForVI.VisualSearchAppIntent` for the `com.apple.appintents-extension` extension point" UserInfo={NSLocalizedDescription=Unable to locate `com.hairlessape.VisualSearchForVI.VisualSearchAppIntent` for the `com.apple.appintents-extension` extension point} error 09:45:45.698368-0600 duetexpertd [com.hairlessape.VisualSearchForVI.VisualSearchAppIntent] Unable to get connection interface: Error Domain=LNConnectionErrorDomain Code=1100 "Unable to locate `com.hairlessape.VisualSearchForVI.VisualSearchAppIntent` for the `com.apple.appintents-extension` extension point" UserInfo={NSLocalizedDescription=Unable to locate `com.hairlessape.VisualSearchForVI.VisualSearchAppIntent` for the `com.apple.appintents-extension` extension point} (Unable to locate `com.hairlessape.VisualSearchForVI.VisualSearchAppIntent` for the `com.apple.appintents-extension` extension point) I tried putting os_log statements in my code to see what was happening, but none of the log statements ever appeared in the console, leading me to believe my code is never being executed. I've updated the Github project with the latest changes: https://github.com/JoshuaSullivan/VisualSearchForVI

Thank you so much, Ed! I'll try fixing those issues this morning and get back to you.

Update: Based on some feedback from the Apple team, I tried recompiling the .metallib with the Xcode 26 toolchain. It resulted in a new lib that was about 80% larger (7k -> 12k), but worked with both my iOS 26 and iOS 18 devices. I haven't had a chance to test the new lib on older devices yet, but this seems like a solution for people using custom Metal kernels. I'm holding off marking this as answered until I hear back from Apple if they're going to be able to fix compatibility with "old" .metallib kernels.

+1 to this issue. I am working with a couple of different app developers who are getting the same problem.