---
title: Reserved Properties
url: /docs/esc/environments/syntax/reserved-properties/
---
The [`esc` CLI](/docs/install/esc/) and other ESC consumers (e.g. the [`pulumi` CLI](/docs/install/)) conventially assign specific semantics to certain top-level properties of evaluated ESC environments (i.e. properties defined under the [`values` section of the environment definition](/docs/esc/environments/syntax/top-level-keys/values)).

## ESC

- [`environmentVariables`](/docs/esc/environments/syntax/reserved-properties/environment-variables)
- [`files`](/docs/esc/environments/syntax/reserved-properties/files)

## Pulumi IaC

- [`pulumiConfig`](/docs/esc/environments/syntax/reserved-properties/pulumi-config)

## Pulumi Policies

- [`policyConfig`](/docs/esc/environments/syntax/reserved-properties/policy-config)