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Specs is a centralized package metadata repository and distribution service for the Apple platform. It serves as a public index of library specifications, enabling the discovery, resolution, and installation of third-party frameworks for iOS and macOS projects. The project provides a podspec distribution service that hosts and validates library specifications to ensure reproducible dependency resolution. It utilizes a Git-based collection of structured specifications and a REST API to manage library publishing, ownership, and versioning. The system encompasses comprehensive capabilities for

Coq is an interactive theorem prover and proof assistant used for formal mathematical verification and verified software development. It utilizes the Gallina functional language to define computable functions and logical propositions, which are then verified through a machine-checked kernel. The system employs a dependent type system and a Caldicott-style proof engine to automate proof search and tactic execution. These capabilities allow for the creation of formal specifications and the development of algorithms that are mathematically proven to meet specific requirements. The toolset inclu

ROS 2 is a distributed communication middleware for robot systems, built on a peer-to-peer Data Distribution Service (DDS) foundation. It provides a publish-subscribe messaging layer where typed data flows between decoupled components across a network, along with synchronous remote procedure calls and action-based task execution for long-running goals with periodic feedback. The framework includes an interface definition language that generates type-safe code for messages, services, and actions, ensuring cross-language compatibility, and supports fine-grained Quality of Service profiles that c

x-cmd is an AI agent orchestrator, cloud infrastructure CLI, and cross-platform package manager that provides an enhanced POSIX shell toolkit. It integrates large language models directly into the terminal for chatting, code generation, and the execution of agentic workflows, while offering a framework for building interactive terminal user interface components. The project distinguishes itself by deploying containerized AI agents within isolated sandboxes, provisioning them with specialized skills and headless browser automation capabilities. It further streamlines development through a unif