# Changelog

## Score

- CAI 77 → 80 (+3.3)
- Rubric changed (rubric-2026.08.18 → rubric-2026.08.19) — scores are not directly comparable.

## Lenses

- Architecture 95 → 98 (+2.2)
- Maturity 66 → 73 (+6.7)
- Readiness 79 → 79 (+0.0)
- Security 90 → 90 (+0.0)
- Event Sourcing 100 → 100 (+0.0)

## Resolved (8)

- Boundary-crossing change coupling: otel_counter.erl ↔ otel_meter_default.erl (apps/opentelemetry_api_experimental/src/otel_counter.erl)
- Boundary-crossing change coupling: otel_histogram.erl ↔ otel_meter_default.erl (apps/opentelemetry_api_experimental/src/otel_histogram.erl)
- Boundary-crossing change coupling: otel_histogram.erl ↔ otel_meter_server.erl (apps/opentelemetry_api_experimental/src/otel_histogram.erl)
- Change coupling: otel_counter.erl ↔ otel_histogram.erl (apps/opentelemetry_api_experimental/src/otel_counter.erl)
- Change coupling: otel_histogram.erl ↔ otel_updown_counter.erl (apps/opentelemetry_api_experimental/src/otel_histogram.erl)
- Change coupling: otel_propagator_b3multi.erl ↔ otel_propagator_trace_context.erl (apps/opentelemetry_api/src/otel_propagator_b3multi.erl)
- Off-boarding risk: anonymized user #1
- The Exporter README describes the supported protocol (Tracer over GRPC or Protobuf HTTP1.1) and OTLP configuration keys but does not explain why only the Tracer protocol is implemented, leaving the reader unsure which transports are available. (apps/opentelemetry_exporter/README.md)

## New (6)

- Change coupling: otel_aggregation_drop.erl ↔ otel_aggregation_histogram_explicit.erl (apps/opentelemetry_experimental/src/otel_aggregation_drop.erl)
- Change coupling: otel_aggregation_drop.erl ↔ otel_meter_server.erl (apps/opentelemetry_experimental/src/otel_aggregation_drop.erl)
- Change coupling: otel_aggregation_histogram_explicit.erl ↔ otel_aggregation_last_value.erl (apps/opentelemetry_experimental/src/otel_aggregation_histogram_explicit.erl)
- Change coupling: otel_aggregation_histogram_explicit.erl ↔ otel_aggregation_sum.erl (apps/opentelemetry_experimental/src/otel_aggregation_histogram_explicit.erl)
- Change coupling: otel_aggregation_last_value.erl ↔ otel_aggregation_sum.erl (apps/opentelemetry_experimental/src/otel_aggregation_last_value.erl)
- Off-boarding risk: anonymized user #1