chore: merge release v2.6.1 to main

Merge https://github.com/google/adk-python/pull/6543
Syncs version bump and CHANGELOG from release v2.6.1 to main.

Co-authored-by: Kathy Wu <wukathy@google.com>
PiperOrigin-RevId: 957363323

.github/.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "2.6.0"
+  ".": "2.6.1"
 }

CHANGELOG.md

@@ -1,5 +1,19 @@
 # Changelog
 
+## [2.6.1](https://github.com/google/adk-python/compare/v2.6.0...v2.6.1) (2026-07-30)
+
+
+### Features
+
+* add parent terminal grouping and TTL pruning to ADK CLI telemetry ([99bbd83](https://github.com/google/adk-python/commit/99bbd83ddac5f1ade93cdde1be98a1e3164e1da7))
+* capture TTY connectivity in CLI environment telemetry ([c12a025](https://github.com/google/adk-python/commit/c12a025184cec7859d829d8ce7178ddbe3e2e302))
+
+
+### Bug Fixes
+
+* **cli:** implement early telemetry recording for long-running web servers and log successful exit code upon routine teardown ([77726c5](https://github.com/google/adk-python/commit/77726c55b33d6da1688a3d6893fe5e474d79116b))
+* Stop re-validating already-consumed tool confirmations ([2b1204d](https://github.com/google/adk-python/commit/2b1204d0a0dd0d97f1e23f1188ea7366bfcb61e1))
+
 ## [2.6.0](https://github.com/google/adk-python/compare/v2.5.0...v2.6.0) (2026-07-29)
 
 

src/google/adk/cli/browser/assets/config/runtime-config.json

@@ -1,4 +1,3 @@
 {
-  "backendUrl": "",
-  "telemetry": null
-}
+  "backendUrl": ""
+}

src/google/adk/version.py

@@ -13,4 +13,4 @@
 # limitations under the License.
 
 # version: major.minor.patch
-__version__ = "2.6.0"
+__version__ = "2.6.1"