Sample
go.opentelemetry.io/otel v1.45.0: SpanFromContext never returns nil on uninstrumented contexts, ContextWithRemoteSpanContext produces non-recording spans that silently drop in-place mutations, TraceIDFromHex rejects uppercase hex, and TraceState mutations are strictly immutable
Verified sample for golang go.opentelemetry.io/otel v1.45.0: SpanFromContext never returns nil on uninstrumented contexts, ContextWithRemoteSpanContext…
sha256:6ce5d5513105a8ec6185c85a379474fc0c264a342723cf6da8ea4fa0c4591c49
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 never returns nil on uninstrumented contexts, ContextWithRemoteSpanContext produces non-recording spans that silently drop in-place mutations, TraceIDFromHex rejects uppercase hex, and TraceState mutations are strictly immutable
- Packages
- Symbols
-
- go.opentelemetry.io/otel/trace.SpanFromContext
- go.opentelemetry.io/otel/trace.ContextWithRemoteSpanContext
- go.opentelemetry.io/otel/trace.WithNewRoot
- go.opentelemetry.io/otel/trace.TraceIDFromHex
- go.opentelemetry.io/otel/trace.SpanIDFromHex
- go.opentelemetry.io/otel/trace.TraceState
- Environment
- go
- Created
- 2026-08-16T07:51:55Z
Contract
- assert SpanFromContext returns non-nil noopSpan with invalid span context on nil or empty context
- assert ContextWithRemoteSpanContext produces non-recording span that silently drops SetAttributes and SetStatus
- assert Tracer Start on remote context inherits trace ID and parent span ID for local recording child
- assert WithNewRoot severs remote parent context generating fresh trace ID with zero parent ID
- assert TraceIDFromHex and SpanIDFromHex reject uppercase hex strings and all-zeros per W3C specification
- assert TraceState Insert is immutable, prepends keys to index 0, and rejects uppercase key names
Files
- NOTES.md
- csx.json
- go.mod
- go.sum
- trace_context_test.go