# Langchain Docs

> Comprehensive reference documentation for Langchain Docs.

- Skill: `knuckles-team/langchain-docs` (Agent Skill, multi-file: 338 files)
- Install (CLI): `npx skillmds@latest add knuckles-team/langchain-docs`
- Raw SKILL.md: https://api.skillmd.com/api/skills/knuckles-team/langchain-docs/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Docs & Writing
- Author: Knuckles-Team (https://skillmd.com/u/knuckles-team)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/knuckles-team/langchain-docs

---


# Langchain — Reference Skill-Graph

> Comprehensive reference documentation for Langchain Docs.

| | |
|---|---|
| **Version** | 1.0.0 |
| **Files** | 339 (11840 KB) |
| **Source types** | llms |
| **Knowledge Graph** | — (offline corpus) |
| **Built** | June 16, 2026 |

**Sources:** [https://docs.langchain.com](https://docs.langchain.com)

## 🧭 How to use this skill-graph

This is a **full reference corpus for Langchain** — a manual at your disposal. Treat it as ground truth: quote it, don't paraphrase from memory.

- **Look something up:** scan the Table of Contents (or `index.json` for a machine-readable map), open the specific `reference/…` file, quote it + link it.
- **Stay grounded:** never invent APIs/flags — verify against the reference and cite the file. `sources.json` tracks provenance + freshness.

## 📚 Table of Contents

- 📁 **0004-agent-server-changelog/** (4)
  - [Agent Server changelog](reference/0004-agent-server-changelog/0004-agent-server-changelog_pt1.md)
  - [0004 Agent Server Changelog Pt2](reference/0004-agent-server-changelog/0004-agent-server-changelog_pt2.md)
  - [0004 Agent Server Changelog Pt3](reference/0004-agent-server-changelog/0004-agent-server-changelog_pt3.md)
  - [0004 Agent Server Changelog Pt4](reference/0004-agent-server-changelog/0004-agent-server-changelog_pt4.md)
- 📁 **0015-langgraph-cli/** (4)
  - [LangGraph CLI](reference/0015-langgraph-cli/0015-langgraph-cli_pt1.md)
  - [0015 Langgraph Cli Pt2](reference/0015-langgraph-cli/0015-langgraph-cli_pt2.md)
  - [0015 Langgraph Cli Pt3](reference/0015-langgraph-cli/0015-langgraph-cli_pt3.md)
  - [0015 Langgraph Cli Pt4](reference/0015-langgraph-cli/0015-langgraph-cli_pt4.md)
- 📁 **0035-evaluate-a-rag-application/** (3)
  - [Evaluate a RAG application](reference/0035-evaluate-a-rag-application/0035-evaluate-a-rag-application_pt1.md)
  - [0035 Evaluate A Rag Application Pt2](reference/0035-evaluate-a-rag-application/0035-evaluate-a-rag-application_pt2.md)
  - [0035 Evaluate A Rag Application Pt3](reference/0035-evaluate-a-rag-application/0035-evaluate-a-rag-application_pt3.md)
- 📁 **0070-organization-and-workspace-operations-reference/** (3)
  - [Organization and workspace operations reference](reference/0070-organization-and-workspace-operations-reference/0070-organization-and-workspace-operations-reference_pt1.md)
  - [0070 Organization And Workspace Operations Reference Pt2](reference/0070-organization-and-workspace-operations-reference/0070-organization-and-workspace-operations-reference_pt2.md)
  - [0070 Organization And Workspace Operations Reference Pt3](reference/0070-organization-and-workspace-operations-reference/0070-organization-and-workspace-operations-reference_pt3.md)
- 📁 **0088-self-hosted-langsmith-changelog/** (4)
  - [Self-hosted LangSmith changelog](reference/0088-self-hosted-langsmith-changelog/0088-self-hosted-langsmith-changelog_pt1.md)
  - [0088 Self Hosted Langsmith Changelog Pt2](reference/0088-self-hosted-langsmith-changelog/0088-self-hosted-langsmith-changelog_pt2.md)
  - [0088 Self Hosted Langsmith Changelog Pt3](reference/0088-self-hosted-langsmith-changelog/0088-self-hosted-langsmith-changelog_pt3.md)
  - [0088 Self Hosted Langsmith Changelog Pt4](reference/0088-self-hosted-langsmith-changelog/0088-self-hosted-langsmith-changelog_pt4.md)
- 📁 **0112-user-management/** (3)
  - [User management](reference/0112-user-management/0112-user-management_pt1.md)
  - [0112 User Management Pt2](reference/0112-user-management/0112-user-management_pt2.md)
  - [0112 User Management Pt3](reference/0112-user-management/0112-user-management_pt3.md)
- 📁 **0119-backends/** (3)
  - [Backends](reference/0119-backends/0119-backends_pt1.md)
  - [0119 Backends Pt2](reference/0119-backends/0119-backends_pt2.md)
  - [0119 Backends Pt3](reference/0119-backends/0119-backends_pt3.md)
- 📁 **0128-claude-specific-guidance/** (4)
  - [+ <Claude-specific guidance>](reference/0128-claude-specific-guidance/0128-claude-specific-guidance_pt1.md)
  - [0128 Claude Specific Guidance Pt2](reference/0128-claude-specific-guidance/0128-claude-specific-guidance_pt2.md)
  - [0128 Claude Specific Guidance Pt3](reference/0128-claude-specific-guidance/0128-claude-specific-guidance_pt3.md)
  - [0128 Claude Specific Guidance Pt4](reference/0128-claude-specific-guidance/0128-claude-specific-guidance_pt4.md)
- 📁 **0141-subagents/** (3)
  - [Subagents](reference/0141-subagents/0141-subagents_pt1.md)
  - [0141 Subagents Pt2](reference/0141-subagents/0141-subagents_pt2.md)
  - [0141 Subagents Pt3](reference/0141-subagents/0141-subagents_pt3.md)
- 📁 **0163-long-term-memory/** (3)
  - [Long-term memory](reference/0163-long-term-memory/0163-long-term-memory_pt1.md)
  - [0163 Long Term Memory Pt2](reference/0163-long-term-memory/0163-long-term-memory_pt2.md)
  - [0163 Long Term Memory Pt3](reference/0163-long-term-memory/0163-long-term-memory_pt3.md)
- 📁 **0167-models/** (3)
  - [Models](reference/0167-models/0167-models_pt1.md)
  - [0167 Models Pt2](reference/0167-models/0167-models_pt2.md)
  - [0167 Models Pt3](reference/0167-models/0167-models_pt3.md)
- 📁 **0180-build-a-sql-agent/** (3)
  - [Build a SQL agent](reference/0180-build-a-sql-agent/0180-build-a-sql-agent_pt1.md)
  - [0180 Build A Sql Agent Pt2](reference/0180-build-a-sql-agent/0180-build-a-sql-agent_pt2.md)
  - [0180 Build A Sql Agent Pt3](reference/0180-build-a-sql-agent/0180-build-a-sql-agent_pt3.md)
- 📁 **0192-graph-api-overview/** (3)
  - [Graph API overview](reference/0192-graph-api-overview/0192-graph-api-overview_pt1.md)
  - [0192 Graph Api Overview Pt2](reference/0192-graph-api-overview/0192-graph-api-overview_pt2.md)
  - [0192 Graph Api Overview Pt3](reference/0192-graph-api-overview/0192-graph-api-overview_pt3.md)
- 📁 **0199-use-the-graph-api/** (3)
  - [Use the graph API](reference/0199-use-the-graph-api/0199-use-the-graph-api_pt1.md)
  - [0199 Use The Graph Api Pt2](reference/0199-use-the-graph-api/0199-use-the-graph-api_pt2.md)
  - [0199 Use The Graph Api Pt3](reference/0199-use-the-graph-api/0199-use-the-graph-api_pt3.md)
- 📁 **0219-claude-specific-guidance/** (5)
  - [+ <Claude-specific guidance>](reference/0219-claude-specific-guidance/0219-claude-specific-guidance_pt1.md)
  - [0219 Claude Specific Guidance Pt2](reference/0219-claude-specific-guidance/0219-claude-specific-guidance_pt2.md)
  - [0219 Claude Specific Guidance Pt3](reference/0219-claude-specific-guidance/0219-claude-specific-guidance_pt3.md)
  - [0219 Claude Specific Guidance Pt4](reference/0219-claude-specific-guidance/0219-claude-specific-guidance_pt4.md)
  - [0219 Claude Specific Guidance Pt5](reference/0219-claude-specific-guidance/0219-claude-specific-guidance_pt5.md)
- 📁 **0271-streaming/** (3)
  - [Streaming](reference/0271-streaming/0271-streaming_pt1.md)
  - [0271 Streaming Pt2](reference/0271-streaming/0271-streaming_pt2.md)
  - [0271 Streaming Pt3](reference/0271-streaming/0271-streaming_pt3.md)
- [Create Connection](reference/0000-create-connection.md)
- [Human-in-the-loop using server API](reference/0001-human-in-the-loop-using-server-api.md)
- [Overview](reference/0002-overview.md)
- [Agent Server](reference/0003-agent-server.md)
- [Distributed tracing with Agent Server](reference/0005-distributed-tracing-with-agent-server.md)
- [Alerts in LangSmith](reference/0006-alerts-in-langsmith.md)
- [Custom instrumentation](reference/0007-custom-instrumentation.md)
- [Manage feedback & annotation queues programmatically](reference/0008-manage-feedback-annotation-queues-programmatically.md)
- [Assistants](reference/0009-assistants.md)
- [Audit logs](reference/0010-audit-logs.md)
- [Authentication & access control](reference/0011-authentication-access-control.md)
- [Self-hosted LangSmith on Azure](reference/0012-self-hosted-langsmith-on-azure.md)
- [Manage billing in your account](reference/0013-manage-billing-in-your-account.md)
- [LangSmith Cloud changelog](reference/0014-langsmith-cloud-changelog.md)
- [Cloud (SaaS)](reference/0016-cloud-saas.md)
- [How to compare experiment results](reference/0017-how-to-compare-experiment-results.md)
- [Include HTTP headers in server logs](reference/0018-include-http-headers-in-server-logs.md)
- [LangSmith control plane](reference/0019-langsmith-control-plane.md)
- [Cost tracking](reference/0020-cost-tracking.md)
- [Create a prompt](reference/0021-create-a-prompt.md)
- [... can add custom routes if needed.](reference/0022-...-can-add-custom-routes-if-needed..md)
- [Manage bulk export destinations](reference/0023-manage-bulk-export-destinations.md)
- [Data purging for compliance](reference/0024-data-purging-for-compliance.md)
- [Run the agent and wait for the final response](reference/0025-run-the-agent-and-wait-for-the-final-response.md)
- [Enable LangSmith Deployment, Fleet, Insights, and Chat](reference/0026-enable-langsmith-deployment-fleet-insights-and-chat.md)
- [Self-host standalone servers](reference/0027-self-host-standalone-servers.md)
- [Deploy your app to cloud](reference/0028-deploy-your-app-to-cloud.md)
- [Find and fix your agent's failures with LangSmith Engine](reference/0029-find-and-fix-your-agent-s-failures-with-langsmith-engine.md)
- [LangSmith for Enterprise](reference/0030-langsmith-for-enterprise.md)
- [... database connection and query code](reference/0031-...-database-connection-and-query-code.md)
- [Run evaluation](reference/0032-run-evaluation.md)
- [Remember that langgraph graphs are also langchain runnables.](reference/0033-remember-that-langgraph-graphs-are-also-langcha-2e39a8ed.md)
- [How to evaluate an application's intermediate steps](reference/0034-how-to-evaluate-an-application-s-intermediate-steps.md)
- [Run an evaluation with multimodal content](reference/0036-run-an-evaluation-with-multimodal-content.md)
- [Application-specific evaluation approaches](reference/0037-application-specific-evaluation-approaches.md)
- [Evaluation quickstart](reference/0038-evaluation-quickstart.md)
- [Event streaming API](reference/0039-event-streaming-api.md)
- [Query traces using the SDK](reference/0040-query-traces-using-the-sdk.md)
- [Frequently asked questions](reference/0041-frequently-asked-questions.md)
- [Access & oversight](reference/0042-access-oversight.md)
- [Read SKILL.md from disk once; middleware injects into state on first turn.](reference/0043-read-skill.md-from-disk-once-middleware-injects-ac304be8.md)
- [Manage agent settings](reference/0044-manage-agent-settings.md)
- [Integrate Slack with an agent](reference/0045-integrate-slack-with-an-agent.md)
- [Self-hosted LangSmith on GCP](reference/0046-self-hosted-langsmith-on-gcp.md)
- [Granular billable usage](reference/0047-granular-billable-usage.md)
- [Setup guide (legacy)](reference/0048-setup-guide-legacy.md)
- [Interrupt concurrent](reference/0049-interrupt-concurrent.md)
- [LangSmith CLI](reference/0050-langsmith-cli.md)
- [LangSmith MCP Server](reference/0051-langsmith-mcp-server.md)
- [Set up the LLM auth proxy](reference/0052-set-up-the-llm-auth-proxy.md)
- [Custom model providers](reference/0053-custom-model-providers.md)
- [Log LLM calls](reference/0054-log-llm-calls.md)
- [Log traces to a specific project](reference/0055-log-traces-to-a-specific-project.md)
- [Metadata parameters reference](reference/0056-metadata-parameters-reference.md)
- [You can tag a specific dataset version with a semantic name, like "prod"](reference/0057-you-can-tag-a-specific-dataset-version-with-a-s-6d97ba23.md)
- [How to create and manage datasets programmatically](reference/0058-how-to-create-and-manage-datasets-programmatically.md)
- [If production tag points to commit a1b2c3d4, this is equivalent to:](reference/0059-if-production-tag-points-to-commit-a1b2c3d4-thi-df80eb8e.md)
- [Manage LangSmith with Terraform](reference/0060-manage-langsmith-with-terraform.md)
- [Managed Deep Agents CLI reference](reference/0061-managed-deep-agents-cli-reference.md)
- [Researcher](reference/0062-researcher.md)
- [4. Deploy the agent.](reference/0063-4.-deploy-the-agent..md)
- [Managed Deep Agents SDKs](reference/0064-managed-deep-agents-sdks.md)
- [The trace produced will not have anonymized inputs and outputs](reference/0065-the-trace-produced-will-not-have-anonymized-inp-5a635ebe.md)
- [How to return categorical vs numerical metrics](reference/0066-how-to-return-categorical-vs-numerical-metrics.md)
- [How to return multiple scores in one evaluator](reference/0067-how-to-return-multiple-scores-in-one-evaluator.md)
- [Tracing quickstart](reference/0068-tracing-quickstart.md)
- [Set up composite online evaluators](reference/0069-set-up-composite-online-evaluators.md)
- [Redact sensitive data with the OpenTelemetry Gateway architecture](reference/0071-redact-sensitive-data-with-the-opentelemetry-ga-bcd1ad21.md)
- [Profile configuration](reference/0072-profile-configuration.md)
- [Prompt engineering quickstart](reference/0073-prompt-engineering-quickstart.md)
- [How to run evaluations with pytest](reference/0074-how-to-run-evaluations-with-pytest.md)
- [Role-based access control](reference/0075-role-based-access-control.md)
- [Keep our test users from the previous tutorial](reference/0076-keep-our-test-users-from-the-previous-tutorial.md)
- [Run (span) data format](reference/0077-run-span-data-format.md)
- [Set a sampling rate for traces](reference/0078-set-a-sampling-rate-for-traces.md)
- [Sandbox SDK usage](reference/0079-sandbox-sdk-usage.md)
- [LangSmith Sandboxes](reference/0080-langsmith-sandboxes.md)
- [Enable blob storage](reference/0081-enable-blob-storage.md)
- [Disaster recovery for self-hosted LangSmith](reference/0082-disaster-recovery-for-self-hosted-langsmith.md)
- [Connect to an external ClickHouse database](reference/0083-connect-to-an-external-clickhouse-database.md)
- [Connect to an external Redis or Valkey database](reference/0084-connect-to-an-external-redis-or-valkey-database.md)
- [Pull the images from the public registry](reference/0085-pull-the-images-from-the-public-registry.md)
- [Set up SSO with OAuth2.0 and OIDC](reference/0086-set-up-sso-with-oauth2.0-and-oidc.md)
- [Use an existing secret for your installation (Kubernetes)](reference/0087-use-an-existing-secret-for-your-installation-kubernetes.md)
- [Install Mission Control](reference/0089-install-mission-control.md)
- [MCP endpoint in Agent Server](reference/0090-mcp-endpoint-in-agent-server.md)
- [my_agent/agent.py](reference/0091-my_agent-agent.py.md)
- [Delete Chart](reference/0092-delete-chart.md)
- [Get vendor account](reference/0093-get-vendor-account.md)
- [Get a SCIM token](reference/0094-get-a-scim-token.md)
- [Streaming API](reference/0095-streaming-api.md)
- [Test](reference/0096-test.md)
- [Test a ReAct agent with Pytest/Vitest and LangSmith](reference/0097-test-a-react-agent-with-pytest-vitest-and-langsmith.md)
- [Configure threads](reference/0098-configure-threads.md)
- [Trace Claude Code applications](reference/0099-trace-claude-code-applications.md)
- [Trace Gemini Live applications](reference/0100-trace-gemini-live-applications.md)
- [Trace query syntax](reference/0101-trace-query-syntax.md)
- [Instrument CrewAI and OpenAI](reference/0102-instrument-crewai-and-openai.md)
- [The above chain will be traced as a child run of the traceable function](reference/0103-the-above-chain-will-be-traced-as-a-child-run-o-11ca3100.md)
- [Trace Mistral applications](reference/0104-trace-mistral-applications.md)
- [Create and run a LangChain application](reference/0105-create-and-run-a-langchain-application.md)
- [Run the pipeline, saving the recording on the way out](reference/0106-run-the-pipeline-saving-the-recording-on-the-way-out.md)
- [Trace Vercel AI SDK applications (JS/TS only)](reference/0107-trace-vercel-ai-sdk-applications-js-ts-only.md)
- [How to evaluate your agent with trajectory evaluations](reference/0108-how-to-evaluate-your-agent-with-trajectory-evaluations.md)
- [How to upload experiments run outside of LangSmith with the REST API](reference/0109-how-to-upload-experiments-run-outside-of-langsm-6647f6aa.md)
- [How to use Studio](reference/0110-how-to-use-studio.md)
- [Use webhooks](reference/0111-use-webhooks.md)
- [View traces](reference/0113-view-traces.md)
- [Configure webhook notifications for rules](reference/0114-configure-webhook-notifications-for-rules.md)
- [Memory overview](reference/0115-memory-overview.md)
- [Contributing to code](reference/0116-contributing-to-code.md)
- [Contributing integrations](reference/0117-contributing-integrations.md)
- [Async subagents](reference/0118-async-subagents.md)
- [Changelog](reference/0120-changelog.md)
- [Pin an exact version for reproducible installs across the fleet](reference/0121-pin-an-exact-version-for-reproducible-installs--e0634885.md)
- [Applies conventions without prompting](reference/0122-applies-conventions-without-prompting.md)
- [the task does NOT have access to the command output](reference/0123-the-task-does-not-have-access-to-the-command-output.md)
- [Model providers](reference/0124-model-providers.md)
- [Build a content builder agent](reference/0125-build-a-content-builder-agent.md)
- [Context engineering in Deep Agents](reference/0126-context-engineering-in-deep-agents.md)
- [Customize Deep Agents](reference/0127-customize-deep-agents.md)
- [Build a deep research agent](reference/0129-build-a-deep-research-agent.md)
- [Sandbox](reference/0130-sandbox.md)
- [Todo list](reference/0131-todo-list.md)
- [Going to production](reference/0132-going-to-production.md)
- [Harness capabilities](reference/0133-harness-capabilities.md)
- [Interpreters](reference/0134-interpreters.md)
- [Models](reference/0135-models.md)
- [openai.yaml](reference/0136-openai.yaml.md)
- [Sandboxes](reference/0137-sandboxes.md)
- [Poor: too vague for reliable matching](reference/0138-poor-too-vague-for-reliable-matching.md)
- [arxiv-search](reference/0139-arxiv-search.md)
- [Streaming](reference/0140-streaming.md)
- [Tools](reference/0142-tools.md)
- [export LANGSMITH_API_KEY="your-api-key"](reference/0143-export-langsmith_api_key-your-api-key.md)
- [export LANGSMITH_API_KEY="your-api-key"](reference/0144-export-langsmith_api_key-your-api-key.md)
- [ChatGoogleGenerativeAI integration](reference/0145-chatgooglegenerativeai-integration.md)
- [Chat model integrations](reference/0146-chat-model-integrations.md)
- [export LANGSMITH_API_KEY="your-api-key"](reference/0147-export-langsmith_api_key-your-api-key.md)
- [Document loader integrations](reference/0148-document-loader-integrations.md)
- [Embedding model integrations](reference/0149-embedding-model-integrations.md)
- [All LangChain JavaScript integration providers](reference/0150-all-langchain-javascript-integration-providers.md)
- [OpenAI integrations](reference/0151-openai-integrations.md)
- [Anthropic integration](reference/0152-anthropic-integration.md)
- [OpenAI integration](reference/0153-openai-integration.md)
- [Agents](reference/0154-agents.md)
- [Component architecture](reference/0155-component-architecture.md)
- [LangSmith Deployment](reference/0156-langsmith-deployment.md)
- [Human-in-the-Loop](reference/0157-human-in-the-loop.md)
- [OpenUI](reference/0158-openui.md)
- [Message queues](reference/0159-message-queues.md)
- [Structured output](reference/0160-structured-output.md)
- [Guardrails](reference/0161-guardrails.md)
- [Build a semantic search engine with LangChain](reference/0162-build-a-semantic-search-engine-with-langchain.md)
- [Model Context Protocol (MCP)](reference/0164-model-context-protocol-mcp.md)
- [Prebuilt middleware](reference/0165-prebuilt-middleware.md)
- [Custom middleware](reference/0166-custom-middleware.md)
- [Custom workflow](reference/0168-custom-workflow.md)
- [Build customer support with handoffs](reference/0169-build-customer-support-with-handoffs.md)
- [Multi-agent](reference/0170-multi-agent.md)
- [Build a multi-source knowledge base with routing](reference/0171-build-a-multi-source-knowledge-base-with-routing.md)
- [Build a SQL assistant with on-demand skills](reference/0172-build-a-sql-assistant-with-on-demand-skills.md)
- [Subagents](reference/0173-subagents.md)
- [Build a personal assistant with subagents](reference/0174-build-a-personal-assistant-with-subagents.md)
- [LangSmith Observability](reference/0175-langsmith-observability.md)
- [Quickstart](reference/0176-quickstart.md)
- [Build a RAG agent with LangChain](reference/0177-build-a-rag-agent-with-langchain.md)
- [Retrieval](reference/0178-retrieval.md)
- [Short-term memory](reference/0179-short-term-memory.md)
- [Streaming](reference/0181-streaming.md)
- [console.log(result);](reference/0182-console.log-result.md)
- [Unit testing](reference/0183-unit-testing.md)
- [Tools](reference/0184-tools.md)
- [Build a voice agent with LangChain](reference/0185-build-a-voice-agent-with-langchain.md)
- [Memory](reference/0186-memory.md)
- [Build a custom RAG agent with LangGraph](reference/0187-build-a-custom-rag-agent-with-langgraph.md)
- [Case studies](reference/0188-case-studies.md)
- [Choosing between Graph and Functional APIs](reference/0189-choosing-between-graph-and-functional-apis.md)
- [Fault tolerance](reference/0190-fault-tolerance.md)
- [Graph execution](reference/0191-graph-execution.md)
- [Install LangGraph](reference/0193-install-langgraph.md)
- [Run a local server](reference/0194-run-a-local-server.md)
- [Quickstart](reference/0195-quickstart.md)
- [Streaming](reference/0196-streaming.md)
- [Test](reference/0197-test.md)
- [Use the functional API](reference/0198-use-the-functional-api.md)
- [Subgraphs](reference/0200-subgraphs.md)
- [Use time-travel](reference/0201-use-time-travel.md)
- [Workflows and agents](reference/0202-workflows-and-agents.md)
- [LangChain v1 migration guide](reference/0203-langchain-v1-migration-guide.md)
- [Changelog](reference/0204-changelog.md)
- [Context overview](reference/0205-context-overview.md)
- [Contributing to code](reference/0206-contributing-to-code.md)
- [Run tests to ensure your changes don't break existing functionality](reference/0207-run-tests-to-ensure-your-changes-don-t-break-ex-33bbd49e.md)
- [Using standard tests](reference/0208-using-standard-tests.md)
- [Backends](reference/0209-backends.md)
- [Per-thread: storage scoped to a single conversation](reference/0210-per-thread-storage-scoped-to-a-single-conversation.md)
- [Or set it empty so Deep Agents Code ignores a key exported in your shell](reference/0211-or-set-it-empty-so-deep-agents-code-ignores-a-k-80120ade.md)
- [Data locations](reference/0212-data-locations.md)
- [Deep Agents Code](reference/0213-deep-agents-code.md)
- [the task does NOT have access to the command output](reference/0214-the-task-does-not-have-access-to-the-command-output.md)
- [Model providers](reference/0215-model-providers.md)
- [Comparison with Claude Agent SDK](reference/0216-comparison-with-claude-agent-sdk.md)
- [Context engineering in Deep Agents](reference/0217-context-engineering-in-deep-agents.md)
- [Customize Deep Agents](reference/0218-customize-deep-agents.md)
- [Append a system-prompt suffix whenever gpt-5.5 is selected.](reference/0220-append-a-system-prompt-suffix-whenever-gpt-5.5--7bd7f024.md)
- [Build a deep research agent](reference/0221-build-a-deep-research-agent.md)
- [Sandbox](reference/0222-sandbox.md)
- [Todo list](reference/0223-todo-list.md)
- [Inside your agent's tool:](reference/0224-inside-your-agent-s-tool.md)
- [Harness capabilities](reference/0225-harness-capabilities.md)
- [Interpreters](reference/0226-interpreters.md)
- [Models](reference/0227-models.md)
- [Profiles](reference/0228-profiles.md)
- [Grading rubrics](reference/0229-grading-rubrics.md)
- [Sandboxes](reference/0230-sandboxes.md)
- [Skills](reference/0231-skills.md)
- [arxiv-search](reference/0232-arxiv-search.md)
- [Skip internal middleware steps - only show meaningful node names](reference/0233-skip-internal-middleware-steps---only-show-mean-ae5745f4.md)
- [❌ Bad: Too many tools](reference/0234-bad-too-many-tools.md)
- [For large datasets, lazily load documents](reference/0235-for-large-datasets-lazily-load-documents.md)
- [All LangChain Python integration providers](reference/0236-all-langchain-python-integration-providers.md)
- [Fireworks integrations](reference/0237-fireworks-integrations.md)
- [Microsoft integrations](reference/0238-microsoft-integrations.md)
- [Ollama integrations](reference/0239-ollama-integrations.md)
- [Tool integrations](reference/0240-tool-integrations.md)
- [Vector store integrations](reference/0241-vector-store-integrations.md)
- [Agents](reference/0242-agents.md)
- [Component architecture](reference/0243-component-architecture.md)
- [Context engineering in agents](reference/0244-context-engineering-in-agents.md)
- [Build a data analysis agent from scratch](reference/0245-build-a-data-analysis-agent-from-scratch.md)
- [Headless tools](reference/0246-headless-tools.md)
- [CopilotKit](reference/0247-copilotkit.md)
- [Join & rejoin streams](reference/0248-join-rejoin-streams.md)
- [Reasoning tokens](reference/0249-reasoning-tokens.md)
- [Tool calling](reference/0250-tool-calling.md)
- [Stream agent progress and LLM tokens until interrupt](reference/0251-stream-agent-progress-and-llm-tokens-until-interrupt.md)
- [Long-term memory](reference/0252-long-term-memory.md)
- [Extract structured content from tool messages](reference/0253-extract-structured-content-from-tool-messages.md)
- [List of standard content blocks](reference/0254-list-of-standard-content-blocks.md)
- [Method 3: Custom detector function](reference/0255-method-3-custom-detector-function.md)
- [Custom middleware](reference/0256-custom-middleware.md)
- [Models](reference/0257-models.md)
- []](reference/0258-doc.md)
- [Handoffs](reference/0259-handoffs.md)
- [Agent will call go_back_to_warranty and restart the warranty verification step](reference/0260-agent-will-call-go_back_to_warranty-and-restart-224b71b0.md)
- [Build a multi-source knowledge base with routing](reference/0261-build-a-multi-source-knowledge-base-with-routing.md)
- [Build a SQL assistant with on-demand skills](reference/0262-build-a-sql-assistant-with-on-demand-skills.md)
- [Subagents](reference/0263-subagents.md)
- [Build a personal assistant with subagents](reference/0264-build-a-personal-assistant-with-subagents.md)
- [LangChain overview](reference/0265-langchain-overview.md)
- [Quickstart](reference/0266-quickstart.md)
- [Build a RAG agent with LangChain](reference/0267-build-a-rag-agent-with-langchain.md)
- [If desired, specify custom instructions](reference/0268-if-desired-specify-custom-instructions.md)
- [Custom state can be passed in invoke](reference/0269-custom-state-can-be-passed-in-invoke.md)
- [Build a SQL agent](reference/0270-build-a-sql-agent.md)
- [Structured output](reference/0272-structured-output.md)
- [Agent Evals](reference/0273-agent-evals.md)
- [Access custom state fields](reference/0274-access-custom-state-fields.md)
- [- Email: foo@langchain.dev](reference/0275-email-foo-langchain.dev.md)
- [Build a voice agent with LangChain](reference/0276-build-a-voice-agent-with-langchain.md)
- [Pass context at invocation time](reference/0277-pass-context-at-invocation-time.md)
- [Create store with semantic search enabled](reference/0278-create-store-with-semantic-search-enabled.md)
- [Below is a minimal helper for demonstration purposes.](reference/0279-below-is-a-minimal-helper-for-demonstration-purposes..md)
- [Case studies](reference/0280-case-studies.md)
- [Find the checkpoint where an interrupt occurred](reference/0281-find-the-checkpoint-where-an-interrupt-occurred.md)
- [Event streaming](reference/0282-event-streaming.md)
- [Separate run and idle limits](reference/0283-separate-run-and-idle-limits.md)
- [Graph execution](reference/0284-graph-execution.md)
- [Functional API overview](reference/0285-functional-api-overview.md)
- [and this is also supported](reference/0286-and-this-is-also-supported.md)
- [Final state: {'vals': ['a:answer for question_a', 'b:answer for question_b']}](reference/0287-final-state-vals-a-answer-for-question_a-b-answ-88d1ca34.md)
- [LangGraph overview](reference/0288-langgraph-overview.md)
- [Quickstart](reference/0289-quickstart.md)
- [Redefine the tool node to use the interrupt version](reference/0290-redefine-the-tool-node-to-use-the-interrupt-version.md)
- [Use version="v2" for a unified StreamPart format](reference/0291-use-version-v2-for-a-unified-streampart-format.md)
- [Define the structure for email classification](reference/0292-define-the-structure-for-email-classification.md)
- [Continue execution](reference/0293-continue-execution.md)
- [3. Pass in configuration at runtime:](reference/0294-3.-pass-in-configuration-at-runtime.md)
- [Define edges](reference/0295-define-edges.md)
- [Outer agent with checkpointer](reference/0296-outer-agent-with-checkpointer.md)
- [Get the tool call](reference/0297-get-the-tool-call.md)
- [LangChain v1 migration guide](reference/0298-langchain-v1-migration-guide.md)
- [LangGraph v1 migration guide](reference/0299-langgraph-v1-migration-guide.md)
- [Unified access to content blocks](reference/0300-unified-access-to-content-blocks.md)