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LangChain
python.langchain.com › docs › concepts › prompt_templates
Prompt Templates | 🦜️🔗 LangChain
Deep Agents are built on LangChain agents which you can also use LangChain directly.Use LangGraph, our low-level orchestration framework, for advanced needs combining deterministic and agentic workflows.Use LangSmith to trace, debug, and evaluate agents built with any of these frameworks.
Discussions

Langchain//Langgraph prompt link
Hello, I need some help because I want to link the prompts used by the LLM, but I had no success so far to do that without using the @observe decorator. I want to do it using langchain(python). Her... More on github.com
🌐 github.com
3
1
November 19, 2024
[Project] 10+ prompt iterations to make my LangGraph agent follow ONE rule consistently
Links and Installation: GitHub repository (with complete working example): https://github.com/datagusto/agent-control-layer Install: pip install agent-control-layer More on reddit.com
🌐 r/LangChain
1
9
July 3, 2025
Getting messages from within a tool in LangGraph
This is the pattern you should be following: https://langchain-ai.github.io/langgraph/concepts/human_in_the_loop/#editing In a nutshell: you stop the graph when user input is required, add that user input to the state and resume running the graph where it left off. More on reddit.com
🌐 r/LangChain
11
3
October 25, 2024
LCEL with prompts containing code
This is caused by that piece of text with the curly brackets trying to get formatted (when you don't want it to). There's a few ways to handle this. If you are using a ChatMessagePrompt, and the part with the curly brackets has NO other variables, then what you can do is pass that part in NOT as a template (if its part of a template, it will format it). Eg, instead of prompt = ChatPromptTemplate.from_messages([ ("system", template_str), ... ]) Do from langchain_core.messages import SystemMessage prompt = ChatPromptTemplate.from_messages([ SystemMessage(content=template_str), ... ]) 2). If the part of your prompt with curly brakets also has some other string that needs to get formatted, what you can do is treat the code with curly brackets not as part of the template, but rather as part of the input. Eg., if you have template = """ Complex code: {"foo": [1,2,3]} Answer user question: {question} """ You could change it to template = """ Complex code: {code} Answer user question: {question} """ prompt = PromptTemplate.from_template(template) prompt = prompt.partial(code="{"foo": [1,2,3]}") Hope this helps! Happy to answer more More on reddit.com
🌐 r/LangChain
6
2
December 27, 2023
🌐
LangChain
blog.langchain.com › launching-langgraph-templates
Launching LangGraph Templates
September 19, 2024 - We chose templates because this makes it easy to modify the inner functionality of the agents. With templates, you clone the repo - you then have access to all the code, so you can change prompts, chaining logic, and do anything else you want!
🌐
Medium
medium.com › @sajith_k › implementing-a-prompt-generator-using-langchain-langgraph-and-groq-621c84263b68
Implementing a Prompt Generator Using LangChain, LangGraph, and Groq | by Sajith K | Artificial Intelligence in Plain English
September 1, 2025 - We’ll use LangGraph for workflow management, LangChain for LLM interactions, and Groq’s LLama-3 model as our language model. The system starts by gathering information about the prompt requirements through a series of questions.
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Medium
becomingahacker.org › mastering-prompt-engineering-for-langchain-langgraph-and-ai-agent-applications-e26d85a55f13
Mastering Prompt Engineering for LangChain, LangGraph, and AI Agent Applications | by Omar Santos | Medium
June 15, 2025 - Imagine an incident response workflow that needs to decide on the next step based on the type of alert. langgraph's conditional edges make this straightforward. The following is a conceptual example of a graph for triaging alerts. 🧑🏻‍💻NOTE: This example is available at this GitHub repository. # Branching Conditional Logic # Branching conditional logic allows you to include conditional logic in a prompt template.
🌐
Medium
medium.com › @ssmaameri › prompt-templates-in-langchain-efb4da260bd3
Prompt Templates in LangChain. Do you ever get confused by Prompt… | by Sami Maameri | Medium
April 14, 2024 - The variable parts in the template are surround by curly brackets { }, and to fill these parts we pass in a list of key-value pairs (kwargs in python) with the variable name and text they should be filled with to the format() method on the Prompt Template. prompt_template = PromptTemplate.from_template( 'Tell me a {adjective} joke about {content}' ) print(prompt_template.format(adjective='funny', content='chickens')) # -> 'Tell me a funny joke about chickens.'
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Medium
medium.com › @bella.belgarokova_79633 › effortless-ai-prompt-generation-leveraging-langchain-and-langgraph-for-optimal-performance-bce971e5be5c
Effortless AI Prompt Generation: Leveraging Langchain and Langgraph for Optimal Performance | by Bella Belgarokova | Medium
July 24, 2024 - In this tutorial, we will build a sophisticated tool for generating prompt templates tailored for AI language models. This project is particularly useful for AI developers and enthusiasts looking to optimize their models’ performance by creating well-structured prompts. By the end of this tutorial, you will have a comprehensive understanding of how to create, evaluate, and finalize prompts using state-of-the-art models like LLaMA and GPT, leveraging the powerful capabilities of Langchain and Langgraph.
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🌐
Triumph.ai
triumphai.in › post › learn-langchain-langgraph-in-depth-chat-memory-prompts
LangChain & LangGraph Tutorial: In-Depth Chat Memory & Prompts
June 27, 2025 - A detailed, user-centric walkthrough on building AI agents with LangChain & LangGraph—covering conversation buffer memory, prompt templates, and hands-on demos.
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YouTube
youtube.com › watch
Prompt Templating and Techniques in LangChain - YouTube
Until 2021, to use an AI model for a specific use case, we would need to fine-tune the model weights themselves. That would require huge training data and si...
Published   June 11, 2025
🌐
Mirascope
mirascope.com › blog › langchain-prompt-template
A Guide to Prompt Templates in LangChain | Mirascope
June 30, 2025 - Over time, **they also improve results by reducing randomness in how prompts are written**. A prompt template usually consists of two things: 1. A text prompt, which is just a chunk of natural language. It can be plain text, or it can have placeholders like `{variable}` that get filled in with real values when you use it.
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Amazon CloudFront
d197for5662m48.cloudfront.net › documents › publicationstatus › 277388 › preprint_pdf › fb8eaec1c6321150ef863a837f96e139.pdf pdf
Demonstrating Epistemic and Structural Self-Awareness in a ...
1) We present an end-to-end LangGraph workflow that · integrates short-term and long-term memory with · recursive summarization. 2) We develop prompt-engineering patterns that encode · UTC timestamps, enabling the model to reason about · event chronology.