> For the complete documentation index, see [llms.txt](https://docs.asserted.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.asserted.io/concepts.md).

# Concepts

## Projects

A project is the highest-level collection of entities in asserted.io. 

It has a plan attached to it that defines the maximum number of routines that can be added within a project, and the maximum total test time available for all of those routines to run.

You can also invite team members to a project, so they can modify, push, or remove routines.

## Routines

A routine is a collection of files and tests (written for Mocha), that is executed on the interval specified in the [`routine.json`](/reference/routine-json.md) file within the `.asserted` directory of a given repo.

## Records

Test records are the individual recorded results for a given test run. They can be viewed in the UI at [asserted.io](https://app.asserted.io) or using the CLI command `asrtd records`.

![asrtd records CLI command output](/files/-M8DWy2U_gostUsWg7fe)

## Timeline and Timeline Events

The aggregated history of the changes in routine status (from DOWN to UP, etc) are captured in the timeline and a collection of all the records of a specific state are called a timeline event. This can be viewed as **History** within the UI for a given routine, or by running `asrtd timeline` with the CLI.