v0.2.15

What's New

• Drop-in replacement for stdlib errors: Re-export Is, As, Unwrap, Join, and ErrUnsupported from the standard library
• AsType generic re-export: Available behind //go:build go1.26 build tag
• Standalone Cause(err) error function: Walks the Unwrap chain to find the root cause — works on any error, not just ErrorExt
• Bounded traversal: Cause uses a max depth guard to protect against cyclic Unwrap chains
• Updated package documentation and examples

v0.2.14

Add goleak test coverage, guard InitRollbar on empty token, bump Go to 1.25.9

v0.2.13

perf: fast-path in validateTraceID for already-valid trace IDs

v0.2.12

chore: bump options to v0.3.0 and log to v0.3.0 for unified RequestContext

v0.2.11

security: validate client-supplied trace IDs, add SetTraceIDValidator for custom validation

v0.2.10

perf: add SetTraceIdWithValue, cache OTEL span lookup

v0.2.9

What's Changed

• feat: link ColdBrew trace ID to OTEL span — sets coldbrew.trace_id attribute on the OTEL span, including on early-return path
• chore: bump go-coldbrew/log v0.2.7 → v0.2.8 (slog default)
• fix: Makefile bench regex (^$ → ^$$)

v0.2.8

What's Changed

• fix: race-safe asyncSem — replaced bare channel variable with atomic.Pointer[chan struct{}] + sync.Once guard
• fix: atomic shouldNotify — converted customError.shouldNotify from bool to atomic.Bool to fix data race in concurrent NotifyAsync
• fix: safe type assertion in GetTraceId — comma-ok idiom prevents panic on non-string tracerID value
• Default async notification concurrency reduced from 1000 to 20
• Makefile bench regex fix (^$ → ^$$)

v0.2.7

What's Changed

Lazy stack trace capture (6.5x faster error creation)

Replaces eager per-frame stack capture with batch PC capture and deferred symbolization.

Benchmark results (Apple M1 Pro):

Benchmark	Before	After	Improvement
errors.New	3500 ns / 1600 B / 19 allocs	540 ns / 392 B / 6 allocs	6.5x faster, 75% less memory
New + StackFrame()	3500 ns / 1600 B / 19 allocs	1250 ns / 824 B / 9 allocs	2.8x faster, 49% less memory
NewDeepStack (32 frames)	40500 ns / 17 KB / 125 allocs	1060 ns / 392 B / 6 allocs	38x faster, 98% less memory

Changes

• Batch PC capture: single runtime.Callers() replaces loop of runtime.Caller(i) + runtime.FuncForPC(pc)
• Lazy symbolization: StackFrame() resolves frames on first access via sync.Once + runtime.CallersFrames
• Default depth: reduced from 64 to 16 frames (configurable via SetMaxStackDepth, accepts [1, 256])
• Thread-safe config: SetMaxStackDepth uses atomic.Int32, SetBaseFilePath uses atomic.Value
• Frame capping: resolveFrames caps output at captured PC count to handle inlining expansion
• basePath snapshot: captured at error creation time, not resolution time — eliminates races
• Pointer receivers: all customError methods (required by sync.Once)

Compatibility

• Callers() []uintptr — unchanged
• StackFrame() []StackFrame — same output, now lazy
• Sentry, Rollbar, Airbrake notifiers — all work unchanged

v0.2.6

Changes

• Migrate notifier from OpenTracing to OTEL trace context
• Application correlation ID (GetTraceId) takes precedence over OTEL span trace ID
• Error notifications now include both traceId (correlation) and otelTraceId (distributed trace)
• Remove opentracing-go dependency
• Bump go-coldbrew/tracing to v0.2.0