Sample
go.uber.org/zap 1.28.0: Dynamically modify zap 1.28.0 logging levels at runtime via zap.AtomicLevel across base and derived loggers without reinitializing logger instances
Verified sample for golang go.uber.org/zap 1.28.0: Dynamically modify zap 1.28.0 logging levels at runtime via zap.AtomicLevel across base and derived…
sha256:b4d93830bc0e5b11f48fcdf14a96fdb8c2a50cbdf593162924b6eef58f61301d
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 go
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 |
2026-08-17 |
| 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
- Dynamically modify zap 1.28.0 logging levels at runtime via zap.AtomicLevel across base and derived loggers without reinitializing logger instances
- Packages
- Symbols
-
- zap.NewAtomicLevelAt
- zap.AtomicLevel.SetLevel
- zap.AtomicLevel.UnmarshalText
- zapcore.NewCore
- Environment
- go
- Created
- 2026-08-17T18:55:42Z
Contract
- zap.NewAtomicLevelAt enables dynamic log level switching at runtime so that calling SetLevel immediately enables debug log emission across base, child, and sugared loggers without reconstructing the core.
- logger.Core().Enabled(zapcore.DebugLevel) transitions from false to true immediately following atomicLevel.SetLevel(zapcore.DebugLevel)
- derived child loggers created via With and SugaredLogger instances share the same AtomicLevel reference and reflect level mutations immediately
- atomicLevel.UnmarshalText updates the filtering threshold dynamically to warn level, suppressing info logs
Files
- NOTES.md
- atomic_level_test.go
- csx.json
- go.mod
- go.sum