Extensionsi

Extensionsi is a cross-platform extension framework designed to standardize the creation, packaging, and runtime of extensions that can run across multiple host applications, such as web browsers, integrated development environments, and media players. It provides a unified manifest format, a core runtime, and adapters that translate host-specific APIs into a common API surface.

Architecture of Extensionsi consists of a core extensions runtime, a manifest that describes permissions and entry points, sandboxed extension code, and host adapters that bridge each host application to the Extensionsi API. Extensions run in isolated contexts to minimize cross-host interference while maintaining responsive communication with their host.

Development and lifecycle are guided by a declarative approach. Extensions are authored in JavaScript or TypeScript and packaged with a manifest detailing metadata, permissions, and resources. The framework supports an event-driven model with lifecycle hooks for installation, enablement, updates, and removal. An extensions store hosts vetted packages and manages updates to ensure reliability and compatibility.

Security and privacy are central to the design. Extensionsi emphasizes least privilege, with explicit permission requests and runtime revocation. Sandboxing limits access to sensitive resources, and host applications can prompt users to review or disable extensions. Auditing and revocation mechanisms are provided to respond to policy or safety concerns.

Usage and ecosystem are evolving, with broad but gradual adoption. Host applications implement Extensionsi adapters to support the standard API surface, allowing developers to write extensions once and deploy to multiple hosts. The ecosystem includes development tools, testing frameworks, and distribution channels to support quality and interoperability.

Extensionsi is actively maintained, with ongoing releases and community tooling to support developers and users.