# Zewo/Venice

Coroutines, structured concurrency and CSP for Swift on macOS and Linux.

Repository: https://github.com/Zewo/Venice
Canonical: https://ross.abutalabs.com/products/venice
Homepage: http://zewo.github.io/Venice/
Language: Swift
License: MIT
License Family: permissive
Topics: coroutines, venice, server-side-swift, server, csp, swift, swiftpm, structured-concurrency, green-threads, fibers, performance, synchronous, non-blocking, linux
Last push: 2019-04-07T03:29:39+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4001, "days_push": 2705, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1494, forks 57 (observed 2026-08-28T04:04:53.010164+00:00)

## What it is
Venice is a Swift library providing coroutines, structured concurrency, and CSP-style channels, built on a fork of the C library libdill. It supports coroutine cancelation, coroutine groups, send/receive-only channels, and file descriptor polling on macOS and Linux.

## Use cases
- write structured concurrent code in Swift
- use lightweight coroutines instead of threads in Swift
- communicate between concurrent tasks with CSP channels
- cancel long-running coroutines safely
- build non-blocking server-side Swift applications

## When to choose
- you need structured concurrency or CSP channels in Swift on macOS or Linux
- you want lightweight green threads with cancelation semantics

## When to avoid
- you need a maintained library - the latest release is from 2019
- you're targeting Apple platforms with modern Swift concurrency (async/await)
- you can't install the required libdill C dependency

## Facets
- artifact type: library
- maturity: abandoned
- function: concurrency
- domain: developer-tools, backend, programming-languages
- platform: -
- tags: coroutines, structured-concurrency, csp, green-threads, fibers, channels, server-side-swift, libdill, macos, linux, swift

## Member repositories
- Zewo/Venice (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:53.010164+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:33:20.757893+00:00, confidence not recorded.
  - readme: https://github.com/Zewo/Venice (fetched 2026-08-28T04:04:53.010164+00:00, sha 74a853419f05)
  - homepage: http://zewo.github.io/Venice/ (fetched 2026-08-29T11:38:44.348328+00:00, sha 9943409f23f8)
- Data as of 2026-08-30T08:39:29.467469+00:00.