Boost Review for Capy and Corosio Begins Today

The Boost Formal Review of the Corosio and Capy libraries will begin on June 23, 2026 and will conclude on July 7, 2026.

The review manager for these reviews will be Jeff Garland and the libraries are brought to you by Vinnie Falco. Since this is a two library review the period is somewhat extended from normal.

# Capy

Capy is a coroutine foundation library providing task types, execution contexts, executors, asynchronous synchronization primitives, buffer abstractions, and coroutine composition facilities. It serves as the execution and asynchronous programming substrate upon which Corosio is built.

Repository:

Capy[ GitHub Repository](https://github.com/cppalliance/capy)
docs

# Corosio

Corosio is a coroutine-native asynchronous I/O library for C++20. It provides networking and I/O facilities designed specifically for coroutines, with awaitable operations, executor affinity, cancellation support, and cross-platform implementations based on IOCP, epoll, and kqueue.

Repository:

[Corosio GitHub Repository](https://github.com/cppalliance/corosio)
docs

# Review Questions

Potential reviewers are encouraged to consider the following questions:

1. What is your evaluation of the usefulness of the libraries?
2. What is your evaluation of the design?
3. What is your evaluation of the implementation?
4. What is your evaluation of the documentation?
5. Have you used either or both libraries? What was your experience?
6. Are the libraries ready for inclusion in Boost?
7. If not, what changes would you recommend before acceptance?
8. Do the libraries fit well within the existing Boost ecosystem?
9. Are there API, naming, usability, extensibility, or implementation concerns that should be addressed?

# How to Participate

Please post your review to the Boost Developers mailing list. Reviews from both experienced Boost contributors and first-time reviewers are encouraged. Reports based on real-world usage, experimentation, code inspection, and documentation review are all valuable contributions.

At the conclusion of the review period, the review manager will consider all feedback and determine whether the libraries should be accepted into Boost.

We look forward to your participation in this review.

If you have any questions or need assistance please let me know.

Matt - Boost Review Wizard

https://redd.it/1uck5ne
@r_cpp