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Phase 5

Memory Fundamentals

~3 min read

Concept & How It Works

    Why Does It Exist?

    Without memory, every message is a first meeting. Users expect agents to remember preferences, past decisions, and project context.

    Real-World Analogy

    Memory is the difference between talking to a stranger on every call versus a colleague who remembers your last three projects.
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    Visual Workflows

    What is Memory Fundamentals?

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    Example

    Scenario

    A project-management agent remembers you prefer Kanban boards, that sprint 12 slipped, and that your team uses Jira — retrieved at the start of each session.

    Solution

    In Agent Memory, apply Memory Fundamentals to this scenario: A project-management agent remembers you prefer Kanban boards, that sprint 12 slipped, and that your team uses Jira — retrieved at the start of each session. Identify the inputs, run the technique, validate the output, and note one thing you would monitor in production.

    Practice Task

    Do this before moving to the next module — reading alone is not enough.

    Open the Code Walkthrough below and run it locally. Change one parameter related to Memory Fundamentals (e.g. model, temperature, top_k, or tool name), observe the difference in output, and write 2–3 sentences explaining what changed.

    Code Walkthrough

    Highlighted lines show where Memory Fundamentals happens in the code.

    Memory Fundamentals
    1# Memory Fundamentals — minimal example2from openai import OpenAI3
    4client = OpenAI()  # create API client5
    6# Ask the model to explain this topic7response = client.chat.completions.create(  # core API call for Memory Fundamentals8    model="gpt-4o-mini",9    messages=[10        {"role": "system", "content": "You explain memory fundamentals clearly."},11        {"role": "user", "content": f"What is memory fundamentals?"},12    ],13    temperature=0,14)15print(response.choices[0].message.content)  # show output for debugging

    Commands to Remember

    Commands to Remember

    • pip install chromadb # vector store for long-term memory
    • pip install redis # fast session / working memory
    • pip install tiktoken # count tokens before injecting memory

    Common Mistakes

    • Treating Memory Fundamentals as a black box without evaluation
    • Ignoring cost and latency in production
    • Skipping error handling for memory fundamentals

    Cheat Sheet

    Quick recap — the most important points from this module.

    Cheat Sheet

    quick ref
    • Memory Fundamentals
    • Working Memory
    • Long-Term Memory
    • Context Window