diff --git a/.gitmodules b/.gitmodules
index 9342dd4..7543e3c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -14,10 +14,6 @@
 	path = shorebird
 	url = https://git.tonycloud.org/flutter/shorebird.git
 	branch = main
-[submodule "shorebird-engine"]
-	path = shorebird-engine
-	url = https://github.com/shorebirdtech/engine.git
-	branch = shorebird/dev
 [submodule "shorebird-server"]
 	path = shorebird-server
 	url = https://git.tonycloud.org/flutter/shorebird-server.git
diff --git a/README.md b/README.md
index fae2197..58f211d 100644
--- a/README.md
+++ b/README.md
@@ -10,9 +10,8 @@ platform scripts in this root repository.
 | Path | Role | Remote | Branch |
 | --- | --- | --- | --- |
 | `dart-sdk-new` | Dart SDK fork with AOT patch runtime work | `https://git.tonycloud.org/dart-lang/sdk.git` | `tonycloud/dev` |
-| `flutter` | Flutter fork used by app and engine integration tests | `https://git.tonycloud.org/flutter/flutter.git` | `shorebird/dev` |
+| `flutter` | Flutter fork used by app and engine integration tests; engine sources live under `flutter/engine/src/flutter` | `https://git.tonycloud.org/flutter/flutter.git` | `shorebird/dev` |
 | `shorebird` | CLI, protocol/client packages, open patch tools | `https://git.tonycloud.org/flutter/shorebird.git` | `main` |
-| `shorebird-engine` | Shorebird engine reference checkout | `https://github.com/shorebirdtech/engine.git` | `shorebird/dev` |
 | `shorebird-server` | Self-hosted CodePush/auth/management server | `https://git.tonycloud.org/flutter/shorebird-server.git` | `main` |
 | `updater` | Runtime updater and patch package tooling | `https://git.tonycloud.org/flutter/shorebird-updater.git` | `main` |
 | `depot_tools` | Chromium/Dart checkout tooling | `https://chromium.googlesource.com/chromium/tools/depot_tools.git` | `main` |
diff --git a/docs/REPOSITORIES.md b/docs/REPOSITORIES.md
index 1e9fb6e..1c2f8b9 100644
--- a/docs/REPOSITORIES.md
+++ b/docs/REPOSITORIES.md
@@ -10,10 +10,15 @@ Last verified: 2026-06-24.
 | `depot_tools` | `https://chromium.googlesource.com/chromium/tools/depot_tools.git` | `main` | `90f5d4d14de66a5aae4a55b554ad4565111169af` |
 | `flutter` | `https://git.tonycloud.org/flutter/flutter.git` | `shorebird/dev` | `9754ce03d76fb06c23a72ddbd8b7137bfa85446c` |
 | `shorebird` | `https://git.tonycloud.org/flutter/shorebird.git` | `main` | `c824005c2dc65f56b0fa078984fadb649876fce7` |
-| `shorebird-engine` | `https://github.com/shorebirdtech/engine.git` | `shorebird/dev` | `e4575c7403bd3453d04bfa03e01218e5a0bca0c6` |
 | `shorebird-server` | `https://git.tonycloud.org/flutter/shorebird-server.git` | `main` | `774954fce70181846995ebcad842e9c54e57f1a2` |
 | `updater` | `https://git.tonycloud.org/flutter/shorebird-updater.git` | `main` | `3ac748ff28eb4ebb53630c66230b9b1be5df73c2` |
 
+## Removed Top-Level Repositories
+
+| Path | Previous remote URL | Reason |
+| --- | --- | --- |
+| `shorebird-engine` | `https://github.com/shorebirdtech/engine.git` | Separate Flutter engine checkouts are obsolete for this workspace. The archived upstream engine repository points contributors to `flutter/flutter/engine`, and this workspace's `flutter` submodule already contains `flutter/engine/src/flutter`. |
+
 ## Generated Or Obsolete Root Folders
 
 The following root folders are not part of the meta-workspace and can be
diff --git a/shorebird-engine b/shorebird-engine
deleted file mode 160000
index e4575c7..0000000
--- a/shorebird-engine
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit e4575c7403bd3453d04bfa03e01218e5a0bca0c6