aurora / internal /toolcall /time.go
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package toolcall
import (
"crypto/rand"
"encoding/hex"
)
// 24 字符的 hex 字符串,等价于 12 字节随机数;和 的
// "uuid.uuid4().hex[:24]" 行为一致 —— 24 个 hex 字符。
func newCallIDSuffix() string {
var b [12]byte
_, _ = rand.Read(b[:])
return hex.EncodeToString(b[:])
}