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[PR #2730] [MERGED] ft: revamped subgraph docs #2834

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opened 2026-06-05 18:20:07 -04:00 by yindo · 0 comments
yindo commented 2026-06-05 18:20:07 -04:00
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📋 Pull Request Information

Original PR: https://github.com/langchain-ai/docs/pull/2730
Author: @sydney-runkle
Created: 2/19/2026
Status: ✅ Merged
Merged: 2/24/2026
Merged by: @npentrel

Base: main ← Head: sr/improved-subgraphs-docs

📝 Commits (10+)

📊 Changes

4 files changed (+826 additions, -84 deletions)

View changed files

📝 src/oss/langchain/multi-agent/subagents.mdx (+6 -4)
📝 src/oss/langgraph/add-memory.mdx (+1 -1)
📝 src/oss/langgraph/errors/MULTIPLE_SUBGRAPHS.mdx (+30 -7)
📝 src/oss/langgraph/use-subgraphs.mdx (+789 -72)

📄 Description

  • Rewrote the subgraph checkpointing section of the subgraphs docs to clearly explain the three checkpointer modes (False, None/default, True) with a comparison table covering interrupts, persistence, parallel execution, and state inspection
  • Added detailed explanation of checkpoint namespace mechanics and a workaround for parallel execution with checkpointer=True (wrapping subgraphs with unique node names)
  • Expanded the MULTIPLE_SUBGRAPHS error page with a "Why this happens" section
  • Updated cross-references in subagents.mdx and add-memory.mdx to point to the new sections

Preview

Fixes https://linear.app/langchain/issue/DOC-674/improve-docs-on-checkpointing-with-subgraphs-and-state-history

🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.

## 📋 Pull Request Information **Original PR:** https://github.com/langchain-ai/docs/pull/2730 **Author:** [@sydney-runkle](https://github.com/sydney-runkle) **Created:** 2/19/2026 **Status:** ✅ Merged **Merged:** 2/24/2026 **Merged by:** [@npentrel](https://github.com/npentrel) **Base:** `main` ← **Head:** `sr/improved-subgraphs-docs` --- ### 📝 Commits (10+) - [`df62db7`](https://github.com/langchain-ai/docs/commit/df62db70fa647ed45b168baa633cfa17dce91bac) new subgraphs docs - [`25a1c16`](https://github.com/langchain-ai/docs/commit/25a1c16e6e964e31f6182588cafec0ff22f69a90) docs fix - [`cc07b1f`](https://github.com/langchain-ai/docs/commit/cc07b1f6a92c14185c63f6e2ad71d66e90595717) updates - [`9d9127b`](https://github.com/langchain-ai/docs/commit/9d9127ba1b2283191476ccc71cfe9db7aa24505f) improvements - [`6afa87c`](https://github.com/langchain-ai/docs/commit/6afa87cb62e75241000090c66286182f71e135bf) boom - [`5e25435`](https://github.com/langchain-ai/docs/commit/5e25435154ba665e31051f6311cc05713d4b9afd) lauren feedback - [`d375c9e`](https://github.com/langchain-ai/docs/commit/d375c9e6ef2cafdbf03819c2c3f574ea9483571d) new docs - [`9bb69a0`](https://github.com/langchain-ai/docs/commit/9bb69a059fd5255f4ffeeb6a61068cca276d8a31) tools - [`3cbb45d`](https://github.com/langchain-ai/docs/commit/3cbb45d2a84ddcef84a3e4cf62535ff8a5e789ee) another round - [`d134d86`](https://github.com/langchain-ai/docs/commit/d134d865de7fcac4c8715cac23bc7b25aaef1469) minimal edits ### 📊 Changes **4 files changed** (+826 additions, -84 deletions) <details> <summary>View changed files</summary> 📝 `src/oss/langchain/multi-agent/subagents.mdx` (+6 -4) 📝 `src/oss/langgraph/add-memory.mdx` (+1 -1) 📝 `src/oss/langgraph/errors/MULTIPLE_SUBGRAPHS.mdx` (+30 -7) 📝 `src/oss/langgraph/use-subgraphs.mdx` (+789 -72) </details> ### 📄 Description * Rewrote the subgraph checkpointing section of the subgraphs docs to clearly explain the three checkpointer modes (False, None/default, True) with a comparison table covering interrupts, persistence, parallel execution, and state inspection * Added detailed explanation of checkpoint namespace mechanics and a workaround for parallel execution with `checkpointer=True` (wrapping subgraphs with unique node names) * Expanded the MULTIPLE_SUBGRAPHS error page with a "Why this happens" section * Updated cross-references in subagents.mdx and add-memory.mdx to point to the new sections [Preview](https://langchain-5e9cc07a-preview-srimpr-1771857080-b81e823.mintlify.app/oss/python/langgraph/use-subgraphs#subgraph-persistence) Fixes https://linear.app/langchain/issue/DOC-674/improve-docs-on-checkpointing-with-subgraphs-and-state-history --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
yindo added the pull-request label 2026-06-05 18:20:07 -04:00
yindo closed this issue 2026-06-05 18:20:07 -04:00
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Reference: langchain-ai/docs#2834
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