Use stackerr.Errorf("%w", err) everywhere, and then log.Printf("%+v", err) for helpful error stack trace.
When using slog package, the trace is simplified to a single-line.
Cancellable Channel Context superchan
encoding, twist arrays ([]string -> []MyString -> []string)
store/fetch bbolt.DB helpers for nested buckets (path as [][]byte or []string)
(anydb was removed to keep go.mod empty)
a cancellable, signal handling, httpserver+context combo for all kinds of web server programs
for InverseBoolVar (eg: --no-foo to set foo to false)
for FilterCopy and FilterInPlace
json marshaller for using unix timestamp instead of json string