chore(main): release toolbox-langchain 0.5.9

Author: release-please[bot]

.release-please-manifest.json

@@ -1,5 +1,5 @@
 {
-  "packages/toolbox-langchain": "0.5.8",
+  "packages/toolbox-langchain": "0.5.9",
   "packages/toolbox-core": "0.5.9",
   "packages/toolbox-llamaindex": "0.5.8",
   "packages/toolbox-adk": "0.5.8"

packages/toolbox-langchain/CHANGELOG.md

@@ -1,5 +1,22 @@
 # Changelog
 
+## [0.5.9](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-langchain-v0.5.8...toolbox-langchain-v0.5.9) (2026-02-16)
+
+
+### Features
+
+* Deprecate Protocol.TOOLBOX (Native HTTP Protocol) ([#547](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/547)) ([b99ec50](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/b99ec503bb5d85e6bdf84f72343d90ac00ab8d88))
+* Enable package-specific client identification for MCP ([#525](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/525)) ([7ac0d3f](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/7ac0d3f167af1e47c26a3f43bdb48f3fc0a92109))
+
+
+### Miscellaneous Chores
+
+* decouple toolbox-core dependency versioning ([#550](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/550)) ([b8163fe](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/b8163feab0d35aa915213e640200da07c101127a))
+* **deps:** bump langchain-core in /packages/toolbox-langchain ([#542](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/542)) ([2654414](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/2654414838cda7c03eaac306e655188600c4635e))
+* **deps:** update mcp toolbox server version in integration tests to v0.27.0 to v0.27.0 ([#545](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/545)) ([851c7b5](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/851c7b542a18cd634b943d47b5b5331ac19dcd5b))
+* Fix issue with release PR presubmits not picking latest changes from orch packages ([#548](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/548)) ([8b0db22](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/8b0db22d55453c963ba726b639922085ef77db20))
+* optimize CI dependency resolution to prevent PyPI version conflicts ([#546](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/546)) ([7c4a608](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/7c4a608734042e0d501bbe351ad0c0e295cfe909))
+
 ## [0.5.8](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-langchain-v0.5.7...toolbox-langchain-v0.5.8) (2026-01-28)
 
 

packages/toolbox-langchain/src/toolbox_langchain/version.py

@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.5.8"
+__version__ = "0.5.9"