Sygnal 0.16.0 (2025-07-18)

This is the first Sygnal release under an AGPLv3.0 licence (with CLA, for proprietary dual licensing). You can read more about this here:

• https://matrix.org/blog/2023/11/06/future-of-synapse-dendrite/
• https://element.io/blog/element-to-adopt-agplv3/

Bugfixes

• Fix issue where GCM pushkins behind proxy fail to start. (#408)
• Pin aioapns to be older than v4.0 to avoid a breaking change in key handling. Contributed by Michael DiStefano. (#417)

Updates to the Docker image

• Use Python 3.12 as a base for the Docker image instead of Python 3.11. (#400)
• Speed up the building of the Docker image. (#409)
• Add HEALTHCHECK directive to the container image, using existing /health endpoint. (#418)

Improved Documentation

• Add basic instructions for running within a container. (#410)

Internal Changes

• Bump twisted from 24.3.0 to 24.7.0. (#397)
• Bump aiohttp from 3.9.5 to 3.10.2. (#398)
• Fix unit tests by adding setTcpNoDelay to FakeTransport. (#402)
• Bump virtualenv from 20.26.2 to 20.26.6. (#405)
• Bump jinja2 from 3.1.4 to 3.1.5. (#406)
• Bump docker/build-push-action and docker/metadata-action to the latest versions. (#412)
• Add a CI test for Sygnal's HTTP proxy functionality. (#413)