Sample
go.opentelemetry.io/otel/trace v1.45.0: SpanFromContext returns non-nil no-op spans for uninstrumented contexts, SpanContextConfig requires explicit FlagsSampled to prevent silent child span suppression, WithNewRoot severs parent trace IDs while invalid links are dropped, and TraceState strictly rejects uppercase keys while enforcing head-promotion
Verified sample for golang go.opentelemetry.io/otel/trace v1.45.0: SpanFromContext returns non-nil no-op spans for uninstrumented contexts, SpanContextConfig…
sha256:2293c213fb83eb5777e19f685b3c1c4ba11e5acaeeb6995eb093958dc0b307b5
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
go linux x64 go go gomod
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| go 1.26 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1 |
2026-08-16 |
| go 1.26 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1 |
2026-08-18 |
Case
HOW- Goal
- SpanFromContext returns non-nil no-op spans for uninstrumented contexts, SpanContextConfig requires explicit FlagsSampled to prevent silent child span suppression, WithNewRoot severs parent trace IDs while invalid links are dropped, and TraceState strictly rejects uppercase keys while enforcing head-promotion
- Packages
- Symbols
-
- go.opentelemetry.io/otel/trace.SpanFromContext
- go.opentelemetry.io/otel/trace.SpanContextFromContext
- go.opentelemetry.io/otel/trace.ContextWithRemoteSpanContext
- go.opentelemetry.io/otel/trace.NewSpanContext
- go.opentelemetry.io/otel/trace.WithNewRoot
- go.opentelemetry.io/otel/trace.WithLinks
- go.opentelemetry.io/otel/trace.ParseTraceState
- go.opentelemetry.io/otel/trace.TraceState
- go.opentelemetry.io/otel/trace.TraceFlags
- Environment
- go
- Created
- 2026-08-16T07:51:53Z
Contract
- assert SpanFromContext returns non-nil noopSpan with invalid SpanContext on uninstrumented context
- assert ContextWithRemoteSpanContext wraps remote SpanContext in a non-recording span while tracer starts recording child
- assert valid SpanContext with TraceFlags 0 suppresses child recording whereas invalid TraceID falls back to sampled root
- assert WithNewRoot creates detached trace and WithLinks drops invalid SpanContext links
- assert ParseTraceState and Insert reject uppercase keys while Insert promotes updated keys to head and evicts tail at 32 members
- assert SpanContext equality is determined by Equal method across traceID spanID flags traceState and remote status
Files
- NOTES.md
- csx.json
- go.mod
- go.sum
- trace_config_test.go