v1.3.0 (2026-07-29)

📦 Dependencies

Available on Clojars:

1. Telemere - main dep
2. SLF4J provider - extra dep to send Java logging to Telemere

This project uses Break Versioning.

Release notes

This is a significant maintenance release with plenty of small fixes, esp. for OpenTelemetry and I/O integrations. It should be a safe, non-breaking upgrade for users of v1.x.

As usual, please test carefully and report any unexpected problems on GitHub or the Slack channel 🙏

- Peter Taoussanis

Since v1.2.1 (2025-12-16)

New

• [new] OpenTelemetry handler: expose IAttributesBuilder protocol [bd649a0]
• [new] clean-signal-fn: customize errors [a16f963]

Fixes

With user-facing changes

• [fix] OpenTelemetry spans: fix parentage, ownership, draining, and completion [e708ca1] [e403635] [78aed4e] [fcca810]
• [fix] OpenTelemetry logs: restore the default provider (nil remains opt-out) [52fa52d]
• [fix] OpenTelemetry: close viability probes and remove unbounded name caches [dae6319] [a80b008]
• [fix] Outbound handlers: surface Slack failures and safely truncate Postal subjects [c6b072f] [77c1d22]
• [fix] File handlers: improve failure recovery, rotation, gzip, and archive scanning [426b289] [d531645] [9ce9ebd] [c17751b] [4e15b82]

Without user-facing changes

• [fix] Socket handlers: preserve UTF-8; improve cleanup and reconnects [2647629] [dac4849] [51bb337] [98477b3]
• [fix] Stream interop: support Java 8; preserve UTF-8 and partial output; serialize lifecycle [d7011e7] [abf3adf] [cd232f3] [b2bfaaa]
• [fix] Signal sampling: evaluate dynamic samples once [0869e68]
• [fix] SLF4J bridge: handle unset timestamps, initialize safely, and refresh marker graphs [0e8e4ee] [f3831f1] [e12bcf4]
• [fix] Trace/error output: preserve falsey run metadata; tidy message-less errors [c359b83] [75f335d]
• [doc] Documentation: correct UID/context docs and improve configuration guidance [6d5fdb0] [14cdcc5] [f512367] [2f591e8] [c1af6c7]