Neo4j message history

[alexthomas93]

Description

This pull request introduces a Neo4jMessageHistory class for storing LLM message histories in a Neo4j database and updates existing classes to use it. It also provides an InMemoryMessageHistory class for in-memory storage, along with a new MessageHistory abstract base class that both implementations inherit from. Lastly, it includes examples and updates the documentation to illustrate how these classes can be used.

Type of Change

• New feature
• Bug fix
• Breaking change
• Documentation update
• Project configuration change

Complexity

Complexity: Medium

How Has This Been Tested?

• Unit tests
• E2E tests
• Manual tests

Checklist

The following requirements should have been met (depending on the changes in the branch):

• Documentation has been updated
• Unit tests have been updated
• E2E tests have been updated
• Examples have been updated
• New files have copyright header
• CLA (https://neo4j.com/developer/cla/) has been signed
• CHANGELOG.md updated if appropriate

[alexthomas93]

@CodiumAI-Agent /update_changelog

[CodiumAI-Agent]

Changelog updates: 🔄

[2025-02-18]*

Added

• Introduced Neo4jMessageHistory and InMemoryMessageHistory classes for managing LLM message histories.
• Added examples and documentation for using message history with Neo4j and in-memory storage.
• Enhanced LLM interfaces to support message history integration.

to commit the new content to the CHANGELOG.md file, please type:
'/update_changelog --pr_update_changelog.push_changelog_changes=true'

[CodiumAI-Agent]

Changelog updates: 🔄

2025-02-21 *

Added

• Introduced Neo4jMessageHistory and InMemoryMessageHistory classes for managing LLM message histories.
• Added examples and documentation for using message history with Neo4j and in-memory storage.
• Updated LLM and GraphRAG classes to support new message history classes.

to commit the new content to the CHANGELOG.md file, please type:
'/update_changelog --pr_update_changelog.push_changelog_changes=true'