[stefanielizeth73-art]

Description

An empty Store field selection (index=[]) still created a Markdown search projection containing the key and namespace. Updating an indexed item with an empty selection also retained a searchable projection.

Apply the existing index=False removal path to an empty effective field list. Constructor defaults and write overrides behave consistently; the JSON value remains readable through get() and nonsemantic search. Nonempty selectors are unchanged.

Human Involvement

• A human participated in the implementation or review loop
• This PR was generated entirely by AI agents without human participation in the loop

Implementation, self-review, and local validation were completed with Codex assistance. Human code review is pending.

Related Issue

Fixes #6962.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• Documentation update
• Test update

Changes Made

• Skip or remove the projection when the effective selector is empty.
• Extend the existing Store persistence contract across sync/async and batch writes, constructor defaults, and new/existing records.
• Document the behavior in English and Chinese.

Testing

Windows / Python 3.13.9; LangGraph 1.2.15, langchain-core 1.6.10, LangChain 1.4.0; based on main 66e8ff0a.

• Expanded Store contract: 16 fail / 118 pass before, 134 pass after.
• Full integration/component suite: 806 pass / 2 fail. The same two Windows path fixtures fail on unchanged main (791 pass / 2 fail); failed test IDs are unchanged.
• Package-wide Ruff and formatting checks pass; mypy passes for all 15 production modules.
• Built the wheel, verified the packaged Store source matches the branch, and ran the Store contract against the installed wheel: 134 pass.

Commands:

python -m pytest -q --noconftest -o addopts='' integrations/frameworks/langchain/tests/test_store.py
python -m pytest -q --noconftest -o addopts='' integrations/frameworks/langchain/tests tests/unit/test_langchain_package_boundary.py
python -m ruff format --check integrations/frameworks/langchain/src integrations/frameworks/langchain/tests tests/unit/test_langchain_package_boundary.py
python -m ruff check integrations/frameworks/langchain/src integrations/frameworks/langchain/tests tests/unit/test_langchain_package_boundary.py
python -m mypy --config-file integrations/frameworks/langchain/pyproject.toml integrations/frameworks/langchain/src/langchain_openviking
python -m pip wheel --no-deps --wheel-dir <output> integrations/frameworks/langchain
git diff --check

Checklist

• Code follows the project's style; existing contract tests were extended.
• Corresponding English and Chinese documentation was updated.
• Human self-review and personal test execution have been recorded.

Screenshots (if applicable)

Not applicable.

Additional Notes

Validation uses controlled storage/search clients, without live server, vector-provider, or model calls. The two full-suite failures are test_resolve_resource_source_handles_local_and_remote_sources and test_add_resource_keeps_explicit_local_clients_supported.

[qin-ctx]

Thanks for preparing this change and its documentation and validation.

As clarified in #6962, we are keeping the OpenViking Store integration focused on semantic indexing and retrieval. We are not taking on additional compatibility behavior for store-only, non-semantic use cases, including making index=[] disable or remove the semantic index.

We are closing this PR without merging based on that maintenance scope. We appreciate the time you spent investigating and implementing the change.