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Phase 14

Web Navigation

~3 min read

Concept & How It Works

    Why Does It Exist?

    Real web tasks aren't single-page interactions. Research, shopping comparison, and compliance checks require navigating across sites, handling redirects, and maintaining context across pages.

    Real-World Analogy

    A web navigation agent is a research assistant who clicks through Google results, opens promising links, skims pages, and bookmarks the best sources.
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    Visual Workflows

    What is Web Navigation?

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    Example

    Scenario

    Agent task: 'Find the cheapest direct flight NYC→London next Friday.' Navigates to 3 comparison sites, handles cookie banners, extracts prices, compares, returns best option with booking link.

    Solution

    In Browser & Computer Use Agents, apply Web Navigation to this scenario: Agent task: 'Find the cheapest direct flight NYC→London next Friday. 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 Web Navigation (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 Web Navigation happens in the code.

    Web Navigation
    1# Web Navigation — 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 Web Navigation8    model="gpt-4o-mini",9    messages=[10        {"role": "system", "content": "You explain web navigation clearly."},11        {"role": "user", "content": f"What is web navigation?"},12    ],13    temperature=0,14)15print(response.choices[0].message.content)  # show output for debugging

    Commands to Remember

    Commands to Remember

    • pip install playwright # browser automation
    • playwright install # install browser binaries

    Common Mistakes

    • Treating Web Navigation as a black box without evaluation
    • Ignoring cost and latency in production
    • Skipping error handling for web navigation

    Cheat Sheet

    Quick recap — the most important points from this module.

    Cheat Sheet

    quick ref
    • Web Navigation
    • Navigation State
    • URL Allowlist
    • SSRF