package helps import (	"crypto/sha256"	"encoding/binary"	"strconv"	"strings" 	"github.com/google/uuid"	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/executor"	cliproxysession "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/session") // DerivedSessionID returns the first context-derived session identity in metadata order.func DerivedSessionID(metadataSets ...map[string]any) string {	for _, metadata := range metadataSets {		if derivedID := cliproxysession.DerivedID(metadata); derivedID != "" {			return derivedID		}	}	return ""} // DerivedSessionUUID maps a derived session identity to a provider-scoped stable UUID.func DerivedSessionUUID(provider string, metadataSets ...map[string]any) string {	return stableProviderSessionUUID(provider, "derived-session", DerivedSessionID(metadataSets...))} // ProviderSessionUUID prefers a long-lived execution session and falls back to the derived identity.func ProviderSessionUUID(provider string, metadataSets ...map[string]any) string {	for _, metadata := range metadataSets {		if executionID := metadataString(metadata, cliproxyexecutor.ExecutionSessionMetadataKey); executionID != "" {			return stableProviderSessionUUID(provider, "execution-session", executionID)		}	}	return DerivedSessionUUID(provider, metadataSets...)} func stableProviderSessionUUID(provider string, kind string, identityValue string) string {	provider = strings.ToLower(strings.TrimSpace(provider))	identityValue = strings.TrimSpace(identityValue)	if provider == "" || identityValue == "" {		return ""	}	identity := strings.Join([]string{"cli-proxy-api", provider, kind, identityValue}, "\x00")	return uuid.NewSHA1(uuid.NameSpaceOID, []byte(identity)).String()} // DerivedAntigravitySessionID maps a derived session identity to Antigravity's negative decimal format.func DerivedAntigravitySessionID(metadataSets ...map[string]any) string {	derivedID := DerivedSessionID(metadataSets...)	if derivedID == "" {		return ""	}	sum := sha256.Sum256([]byte("cli-proxy-api:antigravity:derived-session\x00" + derivedID))	value := int64(binary.BigEndian.Uint64(sum[:8])) & 0x7FFFFFFFFFFFFFFF	return "-" + strconv.FormatInt(value, 10)} func metadataString(metadata map[string]any, key string) string {	if metadata == nil {		return ""	}	value, _ := metadata[key].(string)	return strings.TrimSpace(value)}