You don't write this by hand. You generate it via CLI tools:
: A local, unencrypted file for variables used only on your machine (e.g., local database URLs). It is typically excluded from version control. How the Workflow Operates .env.vault.local
Ensure your .gitignore file explicitly contains the entry: You don't write this by hand
To truly grasp this file, you need to understand the decryption and merging logic. Most advanced libraries (like dotenv version 16.1+ with vault support) follow a specific precedence order. How the Workflow Operates Ensure your
The actual secrets are unlocked using a DOTENV_KEY . This key is never stored in the vault file. Instead, it is set as an environment variable on your local machine or CI server.
This is where .env.vault.local enters the architecture.
To safely use this file, you must understand the load order. Most dotenv libraries load files in a specific hierarchy. It usually looks something like this (highest priority at the top):