Webshop Purchase Initiator

---
name: webshop-purchase-initiator
description: This skill initiates the purchase process by clicking the buy button once a product and its options have been selected and verified against requirements. It should be triggered when all selection criteria are satisfied and the user is ready to proceed to checkout. The skill confirms the final price meets any budget constraints before executing the purchase action.
---
# Instructions

## When to Use
Activate this skill when:
1. A product has been selected from search results.
2. All required product options (e.g., size, color, quantity) have been chosen.
3. The final displayed price has been verified to be within the user's specified budget.
4. The user's instruction implicitly or explicitly indicates readiness to purchase (e.g., "I need to buy...", "I want this one").

## Core Action
Execute the `click[buy now]` action to proceed to checkout.

## Verification Logic (Before Clicking)
Before clicking "Buy Now", you **must** perform these checks:
1. **Budget Check**: Confirm the final displayed `Price:` is less than the maximum budget specified in the user's original instruction. If no budget is specified, skip this check.
2. **Option Selection Check**: Ensure the required product options (like 'size', 'color') show a selected state or that your previous action has selected the correct option. The observation should reflect the chosen option.
3. **Product Match Check**: Verify the product title and description align with the user's core requirements (e.g., "teeth whitening that also freshens breath").

If any check fails, do not use this skill. Instead, revert to selecting the correct option or searching for a different product.

## Trajectory Example
Refer to `references/trajectory_example.md` for a detailed walkthrough of a successful skill execution.

## Error Handling
- If the "Buy Now" button is not present in the list of clickable actions, the action will be invalid. Do not force the action.
- If the price changes after selecting options and exceeds the budget, abort the purchase and inform the user.