Migrate from initialize_agent to langgraph.prebuilt as a community-friendly refactor

[Abdelrahman-Nashaat]

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Feature request

I propose updating LangChain examples and documentation to replace usage of initialize_agent with the newer langgraph.prebuilt components. This change aligns with recent internal discussions (e.g., #29277 (privileged)) and makes the framework more consistent with its long-term design direction. This would also help the community adopt newer practices more easily.

Motivation

Many tutorials and community examples still use initialize_agent, which may soon be deprecated or replaced by langgraph.prebuilt tools. As someone new to the codebase, I found it confusing to follow outdated patterns. By migrating to langgraph.prebuilt, we make it easier for newcomers and contributors to work with updated tools and stay aligned with LangChain’s roadmap. Also, it would be a great opportunity to open this up as a “good first issue” for community members to get involved.

Proposal (If applicable)

I suggest:

Identifying areas in the documentation or example scripts where initialize_agent is still used.

Replacing these with equivalent logic using langgraph.prebuilt, possibly following guidance from the internal refactor in issue #29277.

Optionally, open a public issue (or multiple smaller ones) so the community can contribute incrementally.

If this sounds good to the core team, I’d love to help with the migration or coordinate contributions around it.