feat: add support for stateless MCP 2026 draft and protocol negotiation fallback - #699

starting build "86f83149-a0be-49cf-a10c-08c8da2cba43"

FETCHSOURCE

From https://github.com/googleapis/mcp-toolbox-sdk-python
 * branch            e0c772cf3cac93ad3eb513be5325726e465f111d -> FETCH_HEAD
HEAD is now at e0c772c feat: support user-defined fallback protocols array (#707)
GitCommit:
e0c772cf3cac93ad3eb513be5325726e465f111d
BUILD
Starting Step #0 - "Install requirements"
Step #0 - "Install requirements": Pulling image: python:3.13
Step #0 - "Install requirements": 3.13: Pulling from library/python
Step #0 - "Install requirements": aa3e9ef32f73: Already exists
Step #0 - "Install requirements": 3f59c84a7863: Already exists
Step #0 - "Install requirements": 30d0db852850: Already exists
Step #0 - "Install requirements": 0252e6abaf0f: Already exists
Step #0 - "Install requirements": c92b9edd050e: Pulling fs layer
Step #0 - "Install requirements": 129ee7ddf18e: Pulling fs layer
Step #0 - "Install requirements": dc020b606b19: Pulling fs layer
Step #0 - "Install requirements": dc020b606b19: Download complete
Step #0 - "Install requirements": c92b9edd050e: Verifying Checksum
Step #0 - "Install requirements": c92b9edd050e: Download complete
Step #0 - "Install requirements": 129ee7ddf18e: Verifying Checksum
Step #0 - "Install requirements": 129ee7ddf18e: Download complete
Step #0 - "Install requirements": c92b9edd050e: Pull complete
Step #0 - "Install requirements": 129ee7ddf18e: Pull complete
Step #0 - "Install requirements": dc020b606b19: Pull complete
Step #0 - "Install requirements": Digest: sha256:4c822f0fadfeba9ea973d81fb5bbd5c2106f12ae02d0a5cdd48907909395310b
Step #0 - "Install requirements": Status: Downloaded newer image for python:3.13
Step #0 - "Install requirements": docker.io/library/python:3.13
Step #0 - "Install requirements": Collecting uv
Step #0 - "Install requirements":   Downloading uv-0.11.28-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (11 kB)
Step #0 - "Install requirements": Downloading uv-0.11.28-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (27.1 MB)
Step #0 - "Install requirements":    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 27.1/27.1 MB 54.8 MB/s  0:00:00
Step #0 - "Install requirements": Installing collected packages: uv
Step #0 - "Install requirements": Successfully installed uv-0.11.28
Step #0 - "Install requirements": WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager, possibly rendering your system unusable. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv. Use the --root-user-action option if you know what you are doing and want to suppress this warning.
Step #0 - "Install requirements": Using CPython 3.13.14 interpreter at: /usr/local/bin/python3
Step #0 - "Install requirements": Creating virtual environment at: /workspace/venv
Step #0 - "Install requirements": Activate with: source /workspace/venv/bin/activate
Step #0 - "Install requirements": Using Python 3.13.14 environment at: /workspace/venv
Step #0 - "Install requirements": Resolved 1 package in 270ms
Step #0 - "Install requirements": Downloading uv (25.9MiB)
Step #0 - "Install requirements":  Downloaded uv
Step #0 - "Install requirements": Prepared 1 package in 589ms
Step #0 - "Install requirements": warning: Failed to hardlink files; falling back to full copy. This may lead to degraded performance.
Step #0 - "Install requirements":          If the cache and target directories are on different filesystems, hardlinking may not be supported.
Step #0 - "Install requirements":          If this is intentional, set `export UV_LINK_MODE=copy` or use `--link-mode=copy` to suppress this warning.
Step #0 - "Install requirements": Installed 1 package in 98ms
Step #0 - "Install requirements":  + uv==0.11.28
Step #0 - "Install requirements": Using Python 3.13.14 environment at: /workspace/venv
Step #0 - "Install requirements": Resolved 68 packages in 2.32s
Step #0 - "Install requirements":    Building toolbox-core @ file:///workspace/packages/toolbox-core
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Step #0 - "Install requirements":  Downloaded llama-index-core
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Step #0 - "Install requirements": warning: Failed to hardlink files; falling back to full copy. This may lead to degraded performance.
Step #0 - "Install requirements":          If the cache and target directories are on different filesystems, hardlinking may not be supported.
Step #0 - "Install requirements":          If this is intentional, set `export UV_LINK_MODE=copy` or use `--link-mode=copy` to suppress this warning.
Step #0 - "Install requirements": Installed 68 packages in 739ms
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Step #0 - "Install requirements":  Downloaded grpcio
Step #0 - "Install requirements":  Downloaded pygments
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Step #0 - "Install requirements": Prepared 46 packages in 9m 29s
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Step #0 - "Install requirements": warning: Failed to hardlink files; falling back to full copy. This may lead to degraded performance.
Step #0 - "Install requirements":          If the cache and target directories are on different filesystems, hardlinking may not be supported.
Step #0 - "Install requirements":          If this is intentional, set `export UV_LINK_MODE=copy` or use `--link-mode=copy` to suppress this warning.
Step #0 - "Install requirements": Installed 46 packages in 1.10s
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Finished Step #0 - "Install requirements"
Starting Step #1 - "Run integration tests"
Step #1 - "Run integration tests": Already have image (with digest): python:3.13
Step #1 - "Run integration tests": ============================= test session starts ==============================
Step #1 - "Run integration tests": platform linux -- Python 3.13.14, pytest-9.0.3, pluggy-1.6.0
Step #1 - "Run integration tests": rootdir: /workspace/packages/toolbox-llamaindex
Step #1 - "Run integration tests": configfile: pyproject.toml
Step #1 - "Run integration tests": plugins: cov-7.1.0, asyncio-1.4.0, anyio-4.14.1
Step #1 - "Run integration tests": asyncio: mode=Mode.STRICT, debug=False, asyncio_default_fixture_loop_scope=None, asyncio_default_test_loop_scope=function
Step #1 - "Run integration tests": collected 121 items
Step #1 - "Run integration tests": 
Step #1 - "Run integration tests": tests/test_async_client.py .................                             [ 14%]
Step #1 - "Run integration tests": tests/test_async_tools.py ..................                             [ 28%]
Step #1 - "Run integration tests": tests/test_client.py ................                                    [ 42%]
Step #1 - "Run integration tests": tests/test_e2e.py ...................................................... [ 86%]
Step #1 - "Run integration tests": ......                                                                   [ 91%]
Step #1 - "Run integration tests": tests/test_tools.py ..........                                           [100%]
Step #1 - "Run integration tests": 
Step #1 - "Run integration tests": =============================== warnings summary ===============================
Step #1 - "Run integration tests": tests/test_e2e.py: 20 warnings
Step #1 - "Run integration tests":   /workspace/packages/toolbox-core/src/toolbox_core/utils.py:56: UserWarning: This connection is using HTTP. To prevent credential exposure, please ensure all communication is sent over HTTPS.
Step #1 - "Run integration tests":     warnings.warn(
Step #1 - "Run integration tests": 
Step #1 - "Run integration tests": -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
Step #1 - "Run integration tests": ================================ tests coverage ================================
Step #1 - "Run integration tests": _______________ coverage: platform linux, python 3.13.14-final-0 _______________
Step #1 - "Run integration tests": 
Step #1 - "Run integration tests": Name                                     Stmts   Miss  Cover
Step #1 - "Run integration tests": ------------------------------------------------------------
Step #1 - "Run integration tests": src/toolbox_llamaindex/__init__.py           3      0   100%
Step #1 - "Run integration tests": src/toolbox_llamaindex/async_client.py      49      3    94%
Step #1 - "Run integration tests": src/toolbox_llamaindex/async_tools.py       36      5    86%
Step #1 - "Run integration tests": src/toolbox_llamaindex/client.py            79      4    95%
Step #1 - "Run integration tests": src/toolbox_llamaindex/tools.py             38      3    92%
Step #1 - "Run integration tests": src/toolbox_llamaindex/version.py            1      0   100%
Step #1 - "Run integration tests": ------------------------------------------------------------
Step #1 - "Run integration tests": TOTAL                                      206     15    93%
Step #1 - "Run integration tests": Required test coverage of 90% reached. Total coverage: 92.72%
Step #1 - "Run integration tests": ====================== 121 passed, 20 warnings in 19.82s =======================
Finished Step #1 - "Run integration tests"
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DONE