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LLM and Retrieval Fundamentals: sections and modules
T2.5

Frameworks: LangChain and LangGraph

Read and write framework code without depending on it.

About 2 h 59 min: 59 min reading + 2 h practice · 8 lessons

Scope
Framework literacy only
Prerequisites

Lessons

Start module
8 lessons
  1. 1
    What a Framework Buys You

    7 min

  2. 2
    Composing Pipelines with LangChain

    8 min

  3. 3
    Indexing and Retrieval with LlamaIndex

    6 min

  4. 4
    Modelling Workflows as State Graphs

    7 min

  5. 5
    The Tool-Calling Loop in LangGraph

    7 min

  6. 6
    Checkpoints, Interrupts, and Human Approval

    8 min

  7. 7
    Retries, Fan-Out, and Streaming

    8 min

  8. 8
    Practise Framework Interview Questions

    8 min · Credited source

Practise and Check

Deliverable
Port the tool loop to LangGraph (companion code)
Assessment
Checkpoint
Interview probe
Why or why not use a framework?
Common mistakes
  • Framework tours instead of concepts

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