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Template·Text & Data

Subject Lines Worth Testing

Name: NodeTool
Author: NodeTool

Eight subject lines split between curiosity and clarity — the two strategies that behave differently enough to be worth an A/B, unlike eight variations on one.

Download NodeTool How to run it

Input

Meet the Field Coffee subscription. Two freshly roasted bags delivered each month. Choose your grind and change or cancel your plan any time.

Curiosity-led
1. What’s in your next coffee box?
2. Want a surprise roast each month?
3. Two mystery bags. One perfect sip.
4. Could this replace your morning ritual?

Clarity-led
1. Field Coffee: 2 bags delivered monthly
2. Two freshly roasted bags, every month
3. Choose your grind. Change or cancel anytime
4. Subscribe for 2 freshly roasted bags/month

The workflow

Data flow3 nodes

String Input

input

Agent

agents

gpt-5-mini

Output

output

Nodes in this workflow

3 nodes · 3 types

Agent
nodetool.agents.Agent
Output
nodetool.output.Output
String Input
nodetool.input.StringInput

How to run it

01
Download NodeTool Studio
Install the free desktop app for macOS, Windows, or Linux. It runs on your own machine, no account required to start.
02
Open the Subject Lines Worth Testing template
Browse the built-in template library inside Studio and open this workflow onto the canvas. Every node is already wired up.
03
Add your keys
Connect the providers this workflow uses (Agent). Bring your own keys — you pay the provider directly.
04
Run and remix
Hit Run to execute the graph and watch results stream in. Swap models, edit prompts, or rewire nodes to make it yours.