> ## 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](https://docs.diffblue.com/installation.md) (no license required)
* A [supported AI coding agent platform](https://docs.diffblue.com/system-requirements.md#supported-ai-coding-agent-platforms) installed and authenticated — run `diffblue-agents install` to configure
* A project that meets the [project requirements](https://docs.diffblue.com/workflows/test-quality-report.md#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](https://docs.diffblue.com/workflows/test-quality-report.md#understanding-the-report) for details on interpreting the metrics.

## Next steps

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


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