Svix

v1.95.0 Breaking

This release includes 3 breaking changes for platform teams planning a safe upgrade.

Published 6d API Development

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✓ No known CVEs patched

Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Topics

api background-jobs background-tasks event-driven kafka messaging

+12 more

queue rabbitmq redis rust stream webhook webhook-dispatcher webhook-ingester webhook-server webhook-service webhooks webhooks-server

Affected surfaces

breaking_upgrade

ReleasePort's take

Light signal

editorial:auto 6d

The release enables 'canceled' message-attempt status by default and moves the Python build system to pyproject.toml per PEP‑518.

Why it matters: Enabling the 'canceled' status adds explicit support for tracking failed attempts, while adopting pyproject.toml (PEP 518) modernizes builds; both changes affect developers working with Python packages and messaging logic.

Summary

AI summary

Updates Libs/Python, Libs/All, and https://peps.python.org/pep-0518/ across a mixed release.

Changes in this release

Type	Severity	Summary	CVE
Feature	Medium	Enable 'canceled' message-attempt status support by default Enable 'canceled' message-attempt status support by default Source: llm_adapter@2026-05-28 Confidence: high	—
Feature	Low	Clarify minimum-supported Python interpreter version as 3.8 Clarify minimum-supported Python interpreter version as 3.8 Source: llm_adapter@2026-05-28 Confidence: high	—
Bugfix	Medium	Fix deprecation warning for DateTimeImmutable construction from null in PHP Fix deprecation warning for DateTimeImmutable construction from null in PHP Source: llm_adapter@2026-05-28 Confidence: high	—
Refactor	Low	Move Python build system from setup.py to pyproject.toml (PEP-518) Move Python build system from setup.py to pyproject.toml (PEP-518) Source: llm_adapter@2026-05-28 Confidence: high	—

Full changelog

What's Changed

Libs/All: Enable server-side support of 'canceled' message-attempt status by default
- If you were previously comparing attempt statuses against 'success', note that the
  result of the comparison will now change for messages canceled by a transformation script
Libs/Python: Move from setup.py to PEP-518-compliant pyproject.toml build system
Libs/Python: Clarify that the minimum-supported Python interpreter version is 3.8
Libs/Python: Actually run tests against all supported python versions
Libs/PHP: Fix deprecation warning for DateTimeImmutable construction from null (thanks @VincentLanglet)

Full Changelog: https://github.com/svix/svix-webhooks/compare/v1.94.0...v1.95.0

Breaking Changes

Libs/All: 'canceled' message‑attempt status is enabled by default, altering comparisons against 'success'.
Libs/Python: Migration from `setup.py` to PEP-518 compliant `pyproject.toml` build system.
Libs/Python: Minimum supported Python interpreter version changed to 3.8.

View diff on GitHub

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About Svix

Open-source webhooks as a service that makes it super easy for API providers to send webhooks.

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