diff --git a/.github/workflows/run-end-to-end.yml b/.github/workflows/run-end-to-end.yml
index 6dced7aa71d..87bba3a702a 100644
--- a/.github/workflows/run-end-to-end.yml
+++ b/.github/workflows/run-end-to-end.yml
@@ -389,6 +389,9 @@ jobs:
     - name: Run TELEMETRY_ENHANCED_CONFIG_REPORTING scenario
       if: always() && steps.build.outcome == 'success' && contains(inputs.scenarios, '"TELEMETRY_ENHANCED_CONFIG_REPORTING"')
       run: ./run.sh TELEMETRY_ENHANCED_CONFIG_REPORTING
+    - name: Run TELEMETRY_EXTENDED_HEARTBEAT scenario
+      if: always() && steps.build.outcome == 'success' && contains(inputs.scenarios, '"TELEMETRY_EXTENDED_HEARTBEAT"')
+      run: ./run.sh TELEMETRY_EXTENDED_HEARTBEAT
     - name: Run TELEMETRY_LOG_GENERATION_DISABLED scenario
       if: always() && steps.build.outcome == 'success' && contains(inputs.scenarios, '"TELEMETRY_LOG_GENERATION_DISABLED"')
       run: ./run.sh TELEMETRY_LOG_GENERATION_DISABLED
diff --git a/manifests/cpp_httpd.yml b/manifests/cpp_httpd.yml
index d49cf2a0941..374c8d4aa01 100644
--- a/manifests/cpp_httpd.yml
+++ b/manifests/cpp_httpd.yml
@@ -185,6 +185,7 @@ manifest:
   tests/test_smoke.py::Test_Library::test_receive_request_trace: missing_feature (For some reason, span type is server i/o web)
   tests/test_span_events.py: incomplete_test_app (Weblog `/add_event` not implemented)
   tests/test_standard_tags.py: irrelevant
+  tests/test_telemetry.py::Test_ExtendedHeartbeat: missing_feature (httpd-datadog has not received an update of its dd-trace-cpp since app-extended-heartbeat was implemented)
   tests/test_telemetry.py::Test_Log_Generation: '>=1.0.3'  # Modified by easy win activation script
   tests/test_telemetry.py::Test_Log_Generation::test_log_generation_enabled: missing_feature  # Created by easy win activation script
   tests/test_telemetry.py::Test_MessageBatch: '>=1.0.3'  # Modified by easy win activation script
diff --git a/manifests/cpp_nginx.yml b/manifests/cpp_nginx.yml
index 08f067b8722..6e96e4cbf53 100644
--- a/manifests/cpp_nginx.yml
+++ b/manifests/cpp_nginx.yml
@@ -425,6 +425,7 @@ manifest:
   tests/test_standard_tags.py: irrelevant
   tests/test_telemetry.py::Test_APMOnboardingInstallID: '>=1.12.0'  # Modified by easy win activation script
   tests/test_telemetry.py::Test_DependencyEnable: '>=1.12.0'  # Modified by easy win activation script
+  tests/test_telemetry.py::Test_ExtendedHeartbeat: missing_feature (nginx-datadog has not received an update of its dd-trace-cpp since app-extended-heartbeat was implemented)
   tests/test_telemetry.py::Test_Log_Generation: '>=1.12.0'  # Modified by easy win activation script
   tests/test_telemetry.py::Test_Log_Generation::test_log_generation_enabled: missing_feature  # Created by easy win activation script
   tests/test_telemetry.py::Test_MessageBatch: '>=1.12.0'  # Modified by easy win activation script
diff --git a/manifests/dotnet.yml b/manifests/dotnet.yml
index 207d6d06f29..5bc1e1b2661 100644
--- a/manifests/dotnet.yml
+++ b/manifests/dotnet.yml
@@ -1189,6 +1189,7 @@ manifest:
       component_version: '>=2.41'
   tests/test_standard_tags.py::Test_StandardTagsUserAgent: v2.13.0
   tests/test_telemetry.py::Test_DependencyEnable: v2.35.0
+  tests/test_telemetry.py::Test_ExtendedHeartbeat: missing_feature (extended-heartbeat payload contains configs missing the required `value` field, failing schema validation)
   tests/test_telemetry.py::Test_Log_Generation:  # Modified by easy win activation script
     - weblog_declaration:
         '*': missing_feature
diff --git a/manifests/golang.yml b/manifests/golang.yml
index 2ca38deab19..75b4f3c4d29 100644
--- a/manifests/golang.yml
+++ b/manifests/golang.yml
@@ -1444,6 +1444,7 @@ manifest:
   tests/test_standard_tags.py::Test_StandardTagsUrl::test_url_with_sensitive_query_string: missing_feature (tracer did not yet implemented the new version of query parameters obfuscation regex)
   tests/test_standard_tags.py::Test_StandardTagsUserAgent: v1.39.0
   tests/test_telemetry.py::Test_DependencyEnable: v1.73.0-dev
+  tests/test_telemetry.py::Test_ExtendedHeartbeat: missing_feature (extended-heartbeat only includes app-started configs, not app-client-configuration-change configs)
   tests/test_telemetry.py::Test_Log_Generation: v1.73.0-dev
   tests/test_telemetry.py::Test_MessageBatch: v1.73.0-dev
   tests/test_telemetry.py::Test_Metric_Generation_Disabled: v1.73.0-dev
diff --git a/manifests/java.yml b/manifests/java.yml
index 97093384bdb..e190db960ad 100644
--- a/manifests/java.yml
+++ b/manifests/java.yml
@@ -4329,6 +4329,10 @@ manifest:
       component_version: '>=1.21.0'
   tests/test_standard_tags.py::Test_StandardTagsUserAgent: v0.107.1
   tests/test_telemetry.py::Test_DependencyEnable: v1.7.0
+  tests/test_telemetry.py::Test_ExtendedHeartbeat:
+    - weblog_declaration:
+        '*': v1.23.0
+        spring-boot-3-native: missing_feature (no app-started telemetry event captured in native image)
   tests/test_telemetry.py::Test_Log_Generation:  # Modified by easy win activation script
     - weblog_declaration:
         '*': missing_feature
diff --git a/manifests/nodejs.yml b/manifests/nodejs.yml
index cb81ab8a21e..7764a3cb606 100644
--- a/manifests/nodejs.yml
+++ b/manifests/nodejs.yml
@@ -87,6 +87,8 @@ refs:
   - &ref_5_88_0 '>=5.88.0'
   - &ref_5_89_0 '>=5.89.0'
   - &ref_5_90_0 '>=5.90.0'
+  - &ref_5_94_0 '>=5.94.0'
+  - &ref_5_97_0 '>=5.97.0'
   - &ref_5_98_0 '>=5.98.0'
   - &ref_5_99_0 '>=5.99.0'
   - &ref_6_0_0 '>=6.0.0-pre'
@@ -2386,6 +2388,7 @@ manifest:
   tests/test_standard_tags.py::Test_StandardTagsUrl::test_url_with_sensitive_query_string: missing_feature (tracer did not yet implemented the new version of query parameters obfuscation regex)
   tests/test_standard_tags.py::Test_StandardTagsUserAgent: v2.9.0
   tests/test_telemetry.py::Test_DependencyEnable: missing_feature
+  tests/test_telemetry.py::Test_ExtendedHeartbeat: *ref_5_97_0
   tests/test_telemetry.py::Test_Log_Generation:  # TODO: a lower version might be supported
     - weblog_declaration:
         '*': missing_feature
diff --git a/manifests/php.yml b/manifests/php.yml
index 408b1cf8855..49a237fcaa6 100644
--- a/manifests/php.yml
+++ b/manifests/php.yml
@@ -1090,6 +1090,7 @@ manifest:
       component_version: '>=0.93.0'
   tests/test_standard_tags.py::Test_StandardTagsUserAgent: v0.75.0
   tests/test_telemetry.py::Test_DependencyEnable: missing_feature
+  tests/test_telemetry.py::Test_ExtendedHeartbeat: missing_feature (PHP telemetry runs via a sidecar process which does not emit app-extended-heartbeat events yet)
   tests/test_telemetry.py::Test_Log_Generation:  # TODO: a lower version might be supported
     - weblog_declaration:
         '*': missing_feature
diff --git a/manifests/python.yml b/manifests/python.yml
index b1c1b6405b4..e2d8ef9b128 100644
--- a/manifests/python.yml
+++ b/manifests/python.yml
@@ -2223,6 +2223,7 @@ manifest:
       component_version: '>=1.18.0-rc1'
   tests/test_standard_tags.py::Test_StandardTagsUserAgent: v1.5.0-rc1
   tests/test_telemetry.py::Test_DependencyEnable: v2.8.0
+  tests/test_telemetry.py::Test_ExtendedHeartbeat: v4.6.5
   tests/test_telemetry.py::Test_Log_Generation:  # Modified by easy win activation script
     - weblog_declaration:
         '*': missing_feature
diff --git a/manifests/ruby.yml b/manifests/ruby.yml
index 47506646760..e6b46155734 100644
--- a/manifests/ruby.yml
+++ b/manifests/ruby.yml
@@ -2111,6 +2111,7 @@ manifest:
         uds-sinatra: missing_feature
   tests/test_standard_tags.py::Test_StandardTagsUserAgent: v1.8.0
   tests/test_telemetry.py::Test_DependencyEnable: v1.4.0
+  tests/test_telemetry.py::Test_ExtendedHeartbeat: ">2.30.0"
   tests/test_telemetry.py::Test_Log_Generation:  # Modified by easy win activation script
     - weblog_declaration:
         '*': missing_feature
diff --git a/tests/test_telemetry.py b/tests/test_telemetry.py
index bf68e5d98ec..ebed087b288 100644
--- a/tests/test_telemetry.py
+++ b/tests/test_telemetry.py
@@ -1069,3 +1069,53 @@ def test_telemetry_sca_propagated(self):
             f"No telemetry found for {target_service_name} on {target_request_type} with configuration in "
             f"{' or '.join(dd_appsec_sca_enabled_names)}"
         )
+
+
+@scenarios.telemetry_extended_heartbeat
+@features.app_extended_heartbeat_event
+class Test_ExtendedHeartbeat:
+    """Test app-extended-heartbeat telemetry event in end-to-end scenario"""
+
+    def setup_extended_heartbeat_config_matches(self):
+        weblog.get("/")
+
+    def test_extended_heartbeat_config_matches(self):
+        """Test that every config reported in app-started or app-client-configuration-change
+        was eventually reported by at least one app-extended-heartbeat event.
+        """
+        telemetry_data = list(interfaces.library.get_telemetry_data())
+
+        # Collect all config names reported in app-started and config-change events
+        expected_config_names: set[str] = set()
+        found_app_started = False
+
+        for data in telemetry_data:
+            request_type = get_request_type(data)
+            if request_type in ("app-started", "app-client-configuration-change"):
+                if request_type == "app-started":
+                    found_app_started = True
+                for c in get_configurations(data) or []:
+                    expected_config_names.add(c["name"])
+
+        assert found_app_started, "app-started event not found"
+
+        # Collect all config names ever reported across all extended heartbeats
+        heartbeat_config_names: set[str] = set()
+        found_extended_hb = False
+
+        for data in telemetry_data:
+            if get_request_type(data) == "app-extended-heartbeat":
+                found_extended_hb = True
+                for c in get_configurations(data) or []:
+                    heartbeat_config_names.add(c["name"])
+
+        assert found_extended_hb, "app-extended-heartbeat event not found"
+
+        # For each expected config, verify it was reported by at least one extended heartbeat.
+        # Configs may appear in heartbeats before or after they are (re-)reported in
+        # config-change events (e.g. remote config updates re-report existing configs).
+        missing = sorted(expected_config_names - heartbeat_config_names)
+        assert not missing, (
+            f"{len(missing)} config(s) reported in app-started or config-change but never "
+            f"included in any app-extended-heartbeat event: {missing}"
+        )
diff --git a/utils/_context/_scenarios/__init__.py b/utils/_context/_scenarios/__init__.py
index a6b36e86b2a..86853f09c40 100644
--- a/utils/_context/_scenarios/__init__.py
+++ b/utils/_context/_scenarios/__init__.py
@@ -186,6 +186,16 @@ class _Scenarios:
         doc="Test env var `DD_TELEMETRY_METRICS_ENABLED=false`",
         scenario_groups=[scenario_groups.telemetry],
     )
+    telemetry_extended_heartbeat = EndToEndScenario(
+        "TELEMETRY_EXTENDED_HEARTBEAT",
+        weblog_env={
+            "DD_TELEMETRY_HEARTBEAT_INTERVAL": "1",
+            "DD_TELEMETRY_EXTENDED_HEARTBEAT_INTERVAL": "2",
+            "_DD_TELEMETRY_EXTENDED_HEARTBEAT_INTERVAL": "2",
+        },
+        doc="Test app-extended-heartbeat telemetry event with a shortened interval",
+        scenario_groups=[scenario_groups.telemetry],
+    )
 
     # ASM scenarios
     appsec_missing_rules = EndToEndScenario(