Aegir is an open-source JavaScript project management tool tailored for Web3 development, providing a streamlined framework for codebase structuring, testing, and deployment across multiple environments, including Node.js, browsers, and Electron. With a strict project structure mandate, Aegir ensures efficient replication and reduced configuration overhead, requiring source code to be placed within the `src` directory, and tests organized under `test` with specific naming conventions. Aegir offers comprehensive CLI capabilities for building, testing, linting, release management, and dependency checks, integrating seamlessly with TypeScript for type declarations. Configurable via `.aegir.js` or `package.json`, Aegir supports continuous integration setups, aided by detailed documentation and Github Actions templates. It facilitates the entire release process, from linting and testing to version bumping and changelog generation, before packaging and publishing to npm and GitHub. Licensed under Apache 2.0 and MIT, Aegir invites contributions under the IPFS Code of Conduct. API documentation is available at [IPFS Aegir](https://ipfs.github.io/aegir).