Describe the bug

#4581 seems to have regressed.

To Reproduce
Steps to reproduce the behavior:

Clone https://github.com/lishaduck/bricks
Open it in VS Code
Watch the Flutter extension complain about invalid packages*
Alternatively, open a file and notice that it's all red

Admittingly, I can't reproduce this this morning, but I could yesterday evening.

Expected behavior

It should ignore everything below __brick__.
Ideally for all diagnostics, but at least for pub get

Screenshots

Please complete the following information:

Workspace Environment

Dart Code extension: 3.92.0
Flutter extension: 3.92.0 (activated)
App: Visual Studio Code
App Host: desktop
Version: mac 1.91.1
Workspace type: Dart, Flutter (LSP)
Dart (3.4.1): /opt/homebrew/Caskroom/flutter/3.19.5/flutter/bin/cache/dart-sdk
Flutter (3.22.1): /opt/homebrew/Caskroom/flutter/3.19.5/flutter (No device)

Output from 'dart info'

/opt/homebrew/Caskroom/flutter/3.19.5/flutter/bin/cache/dart-sdk/bin/dart info

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General info

Dart 3.4.1 (stable) (Tue May 21 15:46:25 2024 +0000) on "macos_arm64"
on macos / Version 14.5 (Build 23F79)
locale is en-US

Process info

Memory	CPU	Elapsed time	Command line
5 MB	0.0%	10:13	dart devtools --machine --allow-embedding --dtd-uri ws:/RE2IxKG1emQrYGRC
1 MB	0.0%	13:39:16	dart devtools --machine --allow-embedding --dtd-uri ws:/iUbYR1oXEr31RwiS
6 MB	0.0%	03:08	dart devtools --machine --allow-embedding --dtd-uri ws:/qaAfcfjoxp85fOMt
1 MB	0.0%	13:28:14	dart devtools --machine --allow-embedding --dtd-uri ws:/vDf2hcUpeJ8ILqrD
10 MB	0.0%	10:48	dart language-server --protocol=lsp --client-id=VS-Code --client-version=3.92.0
9 MB	0.0%	10:23	dart language-server --protocol=lsp --client-id=VS-Code --client-version=3.92.0
14 MB	0.0%	03:09	dart language-server --protocol=lsp --client-id=VS-Code --client-version=3.92.0
7 MB	0.0%	09:25	dart lib/custom_lint_client.dart ::1 51943
1 MB	0.0%	14:01:21	dart tooling-daemon --machine
1 MB	0.0%	13:39:17	dart tooling-daemon --machine
1 MB	0.0%	13:28:21	dart tooling-daemon --machine
5 MB	0.0%	10:48	dart tooling-daemon --machine
5 MB	0.0%	10:23	dart tooling-daemon --machine
6 MB	0.0%	03:09	dart tooling-daemon --machine
18 MB	0.0%	13:39:17	flutter_tools.snapshot daemon
0 MB	87.6%	13:28:21	flutter_tools.snapshot daemon
0 MB	0.0%	13:05:00	flutter_tools.snapshot daemon
24 MB	0.0%	10:23	flutter_tools.snapshot daemon
22 MB	0.0%	03:09	flutter_tools.snapshot daemon

Output from 'flutter doctor'

/opt/homebrew/Caskroom/flutter/3.19.5/flutter/bin/flutter doctor -v

[✓] Flutter (Channel stable, 3.22.1, on macOS 14.5 23F79 darwin-arm64, locale en-US)
    • Flutter version 3.22.1 on channel stable at /opt/homebrew/Caskroom/flutter/3.19.5/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision a14f74ff3a (8 weeks ago), 2024-05-22 11:08:21 -0500
    • Engine revision 55eae6864b
    • Dart version 3.4.1
    • DevTools version 2.34.3
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/dukese01/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • ANDROID_HOME = /Users/dukese01/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b829.9-10027231)
    • All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 15.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 15E204a
    • CocoaPods version 1.15.2
[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2022.3)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b829.9-10027231)
[✓] IntelliJ IDEA Ultimate Edition (version 2024.1.4)
    • IntelliJ at /Users/dukese01/Applications/IntelliJ IDEA Ultimate.app
    • Flutter plugin version 80.0.2
    • Dart plugin version 241.17890.8
[✓] VS Code (version 1.90.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.92.0
[✓] VS Code (version 1.91.1)
    • VS Code at /Users/dukese01/Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.92.0
[✓] Connected device (3 available)
    • macOS (desktop)                 • macos                 • darwin-arm64   • macOS 14.5 23F79 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad • darwin         • macOS 14.5 23F79 darwin-arm64
    • Chrome (web)                    • chrome                • web-javascript • Google Chrome 126.0.6478.183
[✓] Network resources
    • All expected network resources are available.
• No issues found!