Refresh LangGraph install guidance

[blove]

Summary

• Update LangGraph install guidance across package README, website docs, prompt recipes, public agent context, and /llms.txt to include required LangChain peers and chat markdown support where the snippet renders .
• Fix the LangGraph README thread adapter refresh example to call refresh().
• Regenerate LangGraph API docs after correcting the provideFakeAgent() JSDoc example from responses to tokens.

Validation

• npm run generate-api-docs
• npm run generate-agent-context
• npx nx run-many -t lint,test,type-tests,build -p langgraph
• npx nx run-many -t lint,build -p website
• npx nx e2e website --skip-nx-cache

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Project	Deployment	Actions	Updated (UTC)
threadplane	Ready	Preview, Comment	Jul 7, 2026 12:47am

[github-actions]

Automated approval: this PR received an intelligent (AI) code review. See the review comments on this PR.

[github-actions]

Claude finished @blove's task in 2m 50s —— View job

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PR Review

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Summary

Docs-only PR with two real bug fixes. Changes are correct. One minor inconsistency worth noting.

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Bug fixes — both correct

threadsAdapter.refresh() fix (libs/langgraph/README.md:162)

The old example called threadsAdapter.loadThreads(), which doesn't exist on LangGraphThreadsAdapter. The actual public method is refresh() (confirmed in threads-adapter.ts:89). This was a broken copy-paste in the README.

provideFakeAgent JSDoc fix (libs/langgraph/src/lib/testing/provide-fake-agent.ts:19)

responses → tokens matches the actual FakeAgentConfig interface (libs/chat/testing/fake-agent-config.ts:10). The old JSDoc would silently be ignored at runtime since the responses key isn't recognised.

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Peer deps additions — correct

@langchain/core and @langchain/langgraph-sdk are both declared peers of @threadplane/langgraph (libs/langgraph/package.json). Adding them explicitly to install snippets is accurate and helps strict package managers (pnpm, Yarn strict-mode).

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Minor: marked included in some LangGraph install snippets but not others

marked is a required (non-optional) peer dep of @threadplane/chat. The LangGraph quickstart and installation MDX pages now include @threadplane/chat in their install command but still omit marked:

# langgraph/getting-started/installation.mdx and quickstart.mdx
npm install @threadplane/langgraph @threadplane/chat @langchain/core @langchain/langgraph-sdk
#                                  ^^^ has marked as a required peer, not listed

Meanwhile the landing page (docs/page.tsx) and llms.txt do include marked for the LangGraph stack. Users with strict package managers following the LangGraph getting-started docs will get a peer dep prompt for marked that the text doesn't anticipate — the quickstart's "strict package managers may also ask you to install Angular and RxJS peers" sentence doesn't mention marked.

This is minor (npm auto-installs it; the user can follow the chat docs which do include it), but the quickstart's peer-dep disclaimer could mention marked for completeness: Fix this →

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Generated/derived files

api-docs.json, AGENTS.md, CLAUDE.md, and public/ copies are all downstream of the source changes and look fine — no review concerns there.

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Overall the PR is clean. The two bug fixes are accurate and the peer-deps docs update is correct. The marked omission from LangGraph-specific install commands is a minor inconsistency, not a blocker.