Adding the new deepagents-vfs package introduced a requirement of python >= 3.11 as this is what langchain's deepagents requires.

Our test matrix for the monorepo used 3.10. The 3.10 blocker was resolved by moving the shared matrix in _test.yml and _lint.yml to ["3.11", "3.13"], which unblocks this package. Python 3.10 is EOL October 31, 2026, we decided it a safe bet to update all to 3.11.

 But langchain-mongodb, langgraph-checkpoint-mongodb, and langgraph-store-mongodb all still declare requires-python = ">=3.10", so a supported version is no longer covered by CI. Either restore a 3.10 job for those three, or raise their floor to 3.11 as a deliberate, released decision.