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feat: frontend docs#2930

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Christian Bromann (christian-bromann) wants to merge 16 commits intomainfrom
cb/frontend-docs
Open

feat: frontend docs#2930
Christian Bromann (christian-bromann) wants to merge 16 commits intomainfrom
cb/frontend-docs

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@christian-bromann Christian Bromann (christian-bromann) commented Mar 4, 2026 •
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Overview

Split the monolithic streaming/frontend documentation pages into individual pattern-specific pages across LangChain, LangGraph, and DeepAgents. Each page covers a single frontend pattern (tool calling, human-in-the-loop, branching chat, etc.) with an interactive playground embed powered by the @langchain/docs-sandbox npm package.

Also restructures the "Streaming" nav groups into a top-level "Streaming" page and a new "Frontend" nav group for each product.

Type of change

Type: New documentation page / Update existing documentation

Related issues/PRs

  • GitHub issue:
  • Feature PR:
  • Linear issue:
  • Slack thread:

Checklist

  • I have read the contributing guidelines
  • I have tested my changes locally using docs dev
  • All code examples have been tested and work correctly
  • I have used root relative paths for internal links
  • I have updated navigation in src/docs.json if needed

(Internal team members only / optional): Create a preview deployment as necessary using the Create Preview Branch workflow

Additional notes

New frontend pattern pages

LangChain (10 pages):
tool-calling, human-in-the-loop, branching-chat, optimistic-updates, reasoning-tokens, structured-output, async-iterator-tools, message-queues, join-rejoin, time-travel

DeepAgents (2 pages):
subagent-streaming, todo-list

LangGraph (1 page):
graph-execution

Each page includes a <PatternEmbed> component that renders an interactive playground preview from the @langchain/docs-sandbox package.

Playground embed build pipeline

The PatternEmbed component is now sourced from the @langchain/docs-sandbox npm package rather than being manually maintained in the source tree:

  • Added package.json with @langchain/docs-sandbox@0.0.3 dependency
  • Added .npmrc with legacy-peer-deps=true (needed because the package declares a peer dependency using pnpm's workspace:* protocol)
  • Updated pipeline/core/builder.py to copy node_modules/@langchain/docs-sandbox/dist/PatternEmbed.jsx → build/snippets/pattern-embed.jsx during the build step
  • CI pipelines need to run npm install before building docs

Navigation changes (src/docs.json)

  • Collapsed Streaming sub-group (overview + frontend) into a single top-level streaming page under LangChain and DeepAgents
  • Added new Frontend nav groups for LangChain (10 pages), DeepAgents (3 pages including overview), and LangGraph (2 pages including overview)

@github-actions github-actions bot added internal ci deepagents For docs changes to Deep Agents docs-infra langchain For docs changes to LangChain langgraph For docs changes to LangGraph oss python For content related to the Python version of LangChain projects labels Mar 4, 2026
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github-actions bot commented Mar 4, 2026

Mintlify preview ID generated: preview-cbfron-1772664047-f7ec6dc

@github-actions github-actions bot added the tests label Mar 4, 2026
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github-actions bot commented Mar 4, 2026

Mintlify preview ID generated: preview-cbfron-1772664478-acb2348

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github-actions bot commented Mar 4, 2026

Mintlify preview ID generated: preview-cbfron-1772665469-8e823f2

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github-actions bot commented Mar 5, 2026

Mintlify preview ID generated: preview-cbfron-1772672259-333c51b

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github-actions bot commented Mar 5, 2026

Mintlify preview ID generated: preview-cbfron-1772673103-b6f941f

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github-actions bot commented Mar 5, 2026

Mintlify preview ID generated: preview-cbfron-1772674638-c26fdec

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github-actions bot commented Mar 5, 2026

Mintlify preview ID generated: preview-cbfron-1772744889-d95ebe9

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github-actions bot commented Mar 6, 2026

Mintlify preview ID generated: preview-cbfron-1772765116-8bfc5d0

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github-actions bot commented Mar 6, 2026

Mintlify preview ID generated: preview-cbfron-1772838585-335578c

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github-actions bot commented Mar 6, 2026

Mintlify preview ID generated: preview-cbfron-1772840960-d2a2597

@christian-bromann Christian Bromann (christian-bromann) marked this pull request as ready for review March 9, 2026 17:44
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github-actions bot commented Mar 9, 2026

Mintlify preview ID generated: preview-cbfron-1773078329-aa08bf4

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github-actions bot commented Mar 9, 2026

Mintlify preview ID generated: preview-cbfron-1773078784-263dfa1

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Christian Bromann (christian-bromann) commented Mar 9, 2026

Preview:

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github-actions bot commented Mar 10, 2026

Mintlify preview ID generated: preview-cbfron-1773118353-67f3933

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github-actions bot commented Mar 10, 2026

Mintlify preview ID generated: preview-cbfron-1773118816-247720b

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github-actions bot commented Mar 10, 2026

Mintlify preview ID generated: preview-cbfron-1773120152-7971bf2

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Mintlify preview ID generated: preview-cbfron-1773123875-e87f51e

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Reviewers

@lnhsingh Lauren Hirata Singh (lnhsingh) Awaiting requested review from lnhsingh lnhsingh is a code owner

@npentrel Naomi Pentrel (npentrel) Awaiting requested review from npentrel npentrel is a code owner

@katmayb Kathryn May (katmayb) Awaiting requested review from katmayb katmayb is a code owner

@fjmorris Florence Morris (fjmorris) Awaiting requested review from fjmorris fjmorris is a code owner

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ci deepagents For docs changes to Deep Agents docs-infra internal langchain For docs changes to LangChain langgraph For docs changes to LangGraph oss python For content related to the Python version of LangChain projects tests

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