Form Filling

Manual form filling is tedious and error-prone — job applications, government filings, insurance claims. Agents can automate this at scale while adapting to varying form layouts.

A form-filling agent is a meticulous office clerk who reads your paperwork and transcribes every field into the correct box on a government form.

Scenario

User provides JSON with personal details. Agent navigates to visa application site, fills 40 fields across 3 pages, uploads passport scan, and pauses for user review before final submit.

Solution

In Browser & Computer Use Agents, apply Form Filling to this scenario: User provides JSON with personal details. Identify the inputs, run the technique, validate the output, and note one thing you would monitor in production.

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 Form Filling (e.g. model, temperature, top_k, or tool name), observe the difference in output, and write 2–3 sentences explaining what changed.

Highlighted lines show where Form Filling happens in the code.

1field_map = {2    "first_name": 'input[name="givenName"]',3    "last_name": 'input[name="familyName"]',4    "dob": 'input[type="date"]',5}6for key, selector in field_map.items():7    await page.fill(selector, user_data[key])8await page.click('button[type="submit"]')

• Treating Form Filling as a black box without evaluation
• Ignoring cost and latency in production
• Skipping error handling for form filling

Quick recap — the most important points from this module.