> ## Documentation Index
> Fetch the complete documentation index at: https://docs.diffblue.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Quickstart

> Assess your test quality with the Diffblue Test Quality Agent

## Prerequisites

* Diffblue Agents [installed](/installation) (no license required)
* A [supported AI coding agent platform](/system-requirements#supported-ai-coding-agent-platforms) installed and authenticated — run `diffblue-agents install` to configure
* A project that meets the [project requirements](/workflows/test-quality-report#project-requirements)

## Run the test quality report

From the root of your project, start the workflow:

```bash theme={null}
diffblue-agents run test-quality-report
```

Diffblue Agents starts its server, analyzes your project, and runs through the following stages:

* Detects your build system, language, and modules
* Configures coverage and mutation testing tools if not already present
* Runs coverage and mutation analysis
* Displays a per-module quality report

## Review the results

The report shows four metrics for each module and class:

| Metric              | Meaning                                           |
| ------------------- | ------------------------------------------------- |
| **Line coverage**   | Percentage of code lines executed by tests        |
| **Branch coverage** | Percentage of code branches executed by tests     |
| **Mutation score**  | Percentage of code mutations detected by tests    |
| **Test strength**   | Percentage of covered mutations detected by tests |

See [understanding the report](/workflows/test-quality-report#understanding-the-report) for details on interpreting the metrics.

## Next steps

* See the [test quality report](/workflows/test-quality-report) workflow for filtering options and tool configuration details.
* Address gaps identified in the report by running the [Diffblue Testing Agent](/quickstart).