Dotenv documentation

docs/changelog.md

@@ -4,6 +4,21 @@ sidebar_label: Changelog
 description: The latest updates and changes to CodeRabbit.
 sidebar_position: 13
 ---
+## June 5, 2025
+
+### New Static Analysis Tool
+
+We're excited to announce that [Dotenv Linter](https://github.com/dotenv-linter/dotenv-linter) is now supported on CodeRabbit!
+
+- **Dotenv Linter**: A fast, opinionated linter for `.env` files. It helps prevent misconfigurations by detecting typos, invalid syntax, and duplicated keys.
+
+Here's why you'll love it:
+
+- 🧪 **Catches common mistakes** in environment files before they cause runtime errors.
+- 🚀 **Super fast** with zero config required.
+- 📦 **Supports multiple `.env` formats** like `.env.local`, `.env.production`, and more.
+
+For more details, visit our [tools documentation](https://docs.coderabbit.ai/tools/dotenv).
 
 ### May 30, 2025
 

docs/tools/dotenv.md

@@ -0,0 +1,18 @@
+# Dotenv Linter
+
+**Dotenv Linter** is a lightning-fast linter for `.env` files. It helps ensure your environment files are consistent, typo-free, and follow best practices.
+
+## How It Works in CodeRabbit
+
+CodeRabbit automatically detects `.env`, `.env.local`, and other dotenv-style files and runs `dotenv-linter` on them.
+
+Issues like key duplication, missing values, incorrect formatting, or invalid characters are flagged directly in pull request reviews.
+
+## Configuration
+
+Dotenv Linter works out-of-the-box with zero config. But if needed, you can ignore rules or configure behavior via comments in the `.env` file or project-level config.
+
+## Resources
+
+- [Dotenv Linter GitHub Repo](https://github.com/dotenv-linter/dotenv-linter)
+

docs/tools/list.md

@@ -18,6 +18,7 @@ For an overview of how CodeRabbit uses these tools when generating code reviews,
 | Cppcheck                    | [Cppcheck][Cppcheck]                                       | Code Quality                                        |
 | CSS                         | [Biome][Biome]                                             | Code Quality                                        |
 | Docker                      | [Hadolint][Hadolint], [Checkov][Checkov]                   | Code Quality, Code Security                         |
+| Environment Files (.env)    | [Dotenv Linter][DotenvLinter]                              | Code Quality                                        |
 | GitHub Actions              | [actionlint][actionlint], [Pipeline Remediation][Pipeline] | Code Quality, CI/CD Failure Remediation             |
 | GitLab Pipelines            | [Pipeline Remediation][Pipeline]                           | CI/CD Failure Remediation                           |
 | Go                          | [golangci-lint][golangci-lint]                             | Code Quality                                        |
@@ -78,3 +79,4 @@ For an overview of how CodeRabbit uses these tools when generating code reviews,
 [Brakeman]: /tools/brakeman.md
 [Clippy]: /tools/clippy.md
 [Pylint]: /tools/pylint.md
+[DotenvLinter]: /tools/dotenv.md