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0.1.1

  • Widen the Finch requirement from ~> 0.20.0 to ~> 0.20 (>= 0.20.0 and < 1.0.0). The previous constraint capped Finch below 0.21.0, conflicting with consumers already on 0.21.x; ~> 0.20 matches the documented lower bound and the no-behaviour-change intent.

0.1.0

Initial public Hex release.

  • Supervised Logger handler with bounded buffering, structured OTLP bodies, severity and metadata conversion, optional span correlation, UTF-8 truncation, automatic registration recovery, and rate-limited diagnostics.
  • Telemetry.Metrics counters, sums, gauges, and explicit-bound delta histograms, with converted units, transformed tags, filters, bounded ingress and series, interval reset, and final shutdown snapshots. Summaries are rejected.
  • Shared Finch OTLP/HTTP transport with gzip, bounded deadlines and retries, Retry-After handling, partial-response decoding, and export/drop telemetry. Empty partial-success messages are treated as full success, matching real Collector responses and the OTLP schema.
  • Namespaced protobuf generated from vendored OTLP v1.5.0 schemas. No full SDK, gRPC stack, or runtime gpb requirement; tracing API is optional.
  • Opt-in Docker conformance against pinned OpenTelemetry Collector 0.160.0, checking decoded logs and all four metric types. Default tests remain local.
  • Production consumer release checks with current and minimum dependency resolution, including optional tracing absence/presence. gpb requires 4.21.7 or newer within 4.x because 4.21.0 fails to compile on OTP 29.

Delivery is best effort and in memory. Crashes, overload, and exhausted retries lose data; retries can duplicate accepted data. Traces, durable queues, cumulative metrics, gRPC, and custom certificate/mTLS environment settings are out of scope.

Elixir 1.19+ and OTP 28+ are the baseline. Breaking changes in the initial 0.x series will increment the minor version and include migration notes.