diff --git a/amplifier_app_cli/lib/bundle_loader/discovery.py b/amplifier_app_cli/lib/bundle_loader/discovery.py
index 1bb24cb0..d507c7ba 100644
--- a/amplifier_app_cli/lib/bundle_loader/discovery.py
+++ b/amplifier_app_cli/lib/bundle_loader/discovery.py
@@ -50,6 +50,11 @@
         "remote": "git+https://github.com/microsoft/amplifier-foundation@main#subdirectory=bundles/anchors/bundle.md",
         "show_in_list": True,
     },
+    "anchors-amp-dev": {
+        "package": "",  # No Python package - bundle-only
+        "remote": "git+https://github.com/microsoft/amplifier-foundation@main#subdirectory=bundles/anchors-amp-dev/bundle.md",
+        "show_in_list": True,
+    },
     "recipes": {
         "package": "",  # No Python package - bundle-only
         "remote": "git+https://github.com/microsoft/amplifier-bundle-recipes@main",
diff --git a/tests/test_anchors_amp_dev_registration.py b/tests/test_anchors_amp_dev_registration.py
new file mode 100644
index 00000000..70b2e245
--- /dev/null
+++ b/tests/test_anchors_amp_dev_registration.py
@@ -0,0 +1,40 @@
+"""Regression tests: `anchors-amp-dev` is a registered, side-by-side bundle.
+
+`anchors-amp-dev` is registered so it can be selected by name, but registration
+must NOT change any default. It lives side by side with `amplifier-dev` and
+`anchors`; no user's global or project default is affected.
+"""
+import importlib
+
+from amplifier_app_cli.lib.bundle_loader.discovery import WELL_KNOWN_BUNDLES
+
+EXPECTED_REMOTE = (
+    "git+https://github.com/microsoft/amplifier-foundation@main"
+    "#subdirectory=bundles/anchors-amp-dev/bundle.md"
+)
+
+
+def test_anchors_amp_dev_is_registered():
+    assert "anchors-amp-dev" in WELL_KNOWN_BUNDLES
+    entry = WELL_KNOWN_BUNDLES["anchors-amp-dev"]
+    assert entry["remote"] == EXPECTED_REMOTE
+    assert entry["package"] == ""  # bundle-only, no Python package
+    assert entry["show_in_list"] is True
+
+
+def test_registration_does_not_change_default():
+    # The side-by-side guarantee: registering anchors-amp-dev must not flip the
+    # no-active-bundle default away from `anchors`.
+    tool_cmd = importlib.import_module("amplifier_app_cli.commands.tool")
+    from unittest.mock import patch
+
+    with patch.object(tool_cmd, "_get_active_bundle_name", return_value=None):
+        use_bundle, bundle_name, _ = tool_cmd._should_use_bundle()
+    assert use_bundle is True
+    assert bundle_name == "anchors"
+
+
+def test_amplifier_dev_still_registered_alongside():
+    # anchors-amp-dev does not replace amplifier-dev; both coexist.
+    assert "amplifier-dev" in WELL_KNOWN_BUNDLES
+    assert "anchors-amp-dev" in WELL_KNOWN_BUNDLES