Go SDK complete (Tasks 1–17), three-way E2E trace parity, 100% Go mutation score

163 files · 16,055+ · 317-

4 files changed

Go SDK foundation: ConfigFromEnv reads environment into typed config with validation and exporter range checks. Health counters track signal rates. Event schema validation enforces required fields. Context and session binding propagate trace context through Go call chains. Backpressure semaphore with QueuePolicy (drop/block/sample) and health counter integration. instantiate behavioral
2 files
- config.go
- backpressure.go

4 files changed

resilience.go Resilience layer: gobreaker circuit breaker + backoff + ExporterPolicy
cardinality.go TTL-based cardinality guards with expirable LRU
sampling.go Per-signal sampling with health counter integration
handler.go slog Handler middleware chain: context merge, sampling, PII, schema

Go resilience layer wraps gobreaker circuit breaker with exponential backoff and ExporterPolicy. TTL-based cardinality guards use expirable LRU to cap metric label cardinality. Per-signal sampling with health counter integration. slog Handler provides middleware chain with context merge, sampling, PII sanitization, and schema enforcement. instantiate behavioral
2 files
- resilience.go
- cardinality.go

7 files changed

tracer.go Tracer interface and no-op impl with context propagation
metrics.go Metrics instruments with atomic fallback, sampling, backpressure
propagation.go W3C trace context propagation with size guards
setup.go SetupTelemetry/ShutdownTelemetry with mutex sentinel and runtime config
otel.go OTel provider wiring with slog bridge and real tracer/span adapters
slo.go SLO helpers: ClassifyError, RecordREDMetrics, RecordUSEMetrics
telemetry.go Public facade: telemetry.go with ResetForTests()

Tracer interface with no-op implementation and context propagation. Metrics instruments use atomic fallback when OTel is unavailable, with sampling and backpressure integration. W3C trace context propagation with size guards. SetupTelemetry/ShutdownTelemetry with mutex sentinel prevents double-init. OTel provider wiring includes slog bridge and real tracer/span adapters. SLO helpers (ClassifyError, RecordREDMetrics, RecordUSEMetrics). Public facade exported from telemetry.go with ResetForTests() for test isolation. Conformance validation passes all gates. instantiate behavioral
3 files
- tracer.go
- setup.go
- telemetry.go

2 files changed

event.go EventRecord struct with domain/action/resource/status fields
09_error_handling_and_degradation.py All examples updated to use event() DA(R)S pattern

Structured event() function with DA(R)S fields (domain, action, resource, status) replaces event_name() across Go, Python, and TypeScript. All examples updated. Documentation updated to DA(R)S pattern. interface behavioral
1 file
- event.go

1 file changed

test_three_way_trace_e2e.py 230-line E2E test: Go + TypeScript + Python all emit traces to OpenObserve and verify cross-language correlation

Three-way E2E trace parity test verifies Go, TypeScript, and Python all emit correlated traces to OpenObserve with matching trace IDs. Go achieves 100% mutation score. Go examples 01–13 plus openobserve series matching Python/TypeScript. TypeScript gains circuit breaker + emergency fallback parity with Python. qualify internal
1 file
- test_three_way_trace_e2e.py

3 files changed

ci-go.yml Go CI workflow: lint, test, coverage, mutation
.golangci.yml golangci-lint config updated with gocyclo exclusions for test files
Makefile Makefile with build/test/lint/mutation targets

Go CI workflow added with lint, test, coverage, and mutation gates. golangci-lint configured with gocyclo test file exclusions. PII truncate non-string values converted to string. RED threshold set to 500ms. baseline internal
2 files
- ci-go.yml
- .golangci.yml