# How ZeroWidth works

ZeroWidth reads the decisions your team already writes down, checks each decision against your numbers, and tells your agents what worked.

## Your first week

Day 1 **Connect**

Start ZeroWidth on a computer or a server, and connect your team's AI agents. From then on, agents report new decisions as they're made.

Days 2 and 3 **Bring in what already happened**

ZeroWidth shows what reading your past chats and documents would cost, before reading anything. Nothing is read until you say yes, and never past a spending limit you set.

Days 4 and 5 **Review the decisions ZeroWidth kept**

Read the decisions ZeroWidth found. A decision read wrongly is corrected with a retraction, so nothing is ever quietly edited.

From then on **A check before every decision**

When a similar decision comes up, ZeroWidth shows what happened last time.

## ZeroWidth reads decisions from your team's tools, and shares the results with your team and your agents.

### ZeroWidth reads decisions from

**Chats with Claude and ChatGPT**

From the export file each app gives you.

**Slack and Notion**

From a workspace export.

**Google Docs and Word**

Documents and their comment threads, with who wrote each part.

**GitHub, Jira and Linear**

Commits, issues and pull requests, and how each one ended.

**Meetings**

Transcripts, with who said what.

**Email**

Only the labels your team chooses to share.

**Coding agents and other AI agents**

Claude Code sessions, and any agent reporting decisions as they're made.

**Your numbers**

From Stripe and the other tools your team already uses, or from a CSV file.

### ZeroWidth shares what worked with

**Your AI agents, before they act**

Agents look up past decisions over MCP.

**Your team, in the ZeroWidth console**

Every decision, the part of the business it touched, and how it turned out.

**Your own tools, through an API**

The same record the console reads.

**A file you can export at any time**

All of your decisions as one file, with or without the original text.

## ZeroWidth checks each decision against your numbers.

After a decision, ZeroWidth compares your numbers with how they usually move.

Acme's daily signups
1. Send the welcome email on day two, not day one. Worked.
2. Ask for a work email to sign up. Didn't work.
3. Move the demo call to the second week of a trial. No clear change.
1. **The goal and the guard** Each decision gets the number it should move and which way, plus anything that must not get worse, like signups during a price rise.
2. **Before** Each number's history sets what the weeks ahead would look like with no change.
3. **After** When the time is up, what happened is compared with that. Nothing is judged early.
4. **The usual swing** A change counts only when a number moves more than it does in ordinary weeks.
- **Worked.** A number moved the right way, and none moved the wrong way.
- **Mixed.** One number moved the right way and another moved the wrong way.
- **Didn't work.** No number moved the right way, and at least one moved the wrong way.
- **No clear change.** No number moved more than usual.
- **Too early to call.** The deadline hasn't passed yet, or too few numbers have come in.
- **Can't tell.** Nothing fair to compare with, such as no numbers from before the decision.

## ZeroWidth works with any AI agent

ZeroWidth uses MCP, the standard way AI agents connect to tools. Claude Code, Claude Desktop and other agents check past decisions before they act, and tell ZeroWidth about new decisions.

### Connect Claude Code

With ZeroWidth running on your computer. On a company server, agents connect over your network with a token. Hosted ZeroWidth will give each team one address.

Terminal

```
$ claude mcp add --transport http zerowidth http://127.0.0.1:4380/mcp
```

### Agents look up decisions, report decisions and answer questions
- **Look up past decisions** On a topic, a part of the product or a number.
- **See the best and worst** Over any stretch of time.
- **Report a decision** As the decision is made, with the goal behind the decision.
- **Answer open questions** When ZeroWidth can't tell what happened, the agent can say.

[Set up ZeroWidth, hosted or self-hosted](https://zerowidth.ai/docs/get-started/hosted-or-self-hosted)

## Put your team's decisions to use.

[Get started](https://console.zerowidth.ai/start) [See examples by industry](https://zerowidth.ai/examples)

Have a signup code? [Start with your code](https://console.zerowidth.ai/new)