diff --git a/sdk/cliproxy/auth/conductor.go b/sdk/cliproxy/auth/conductor.go
index 050da3295..785efcd70 100644
--- a/sdk/cliproxy/auth/conductor.go
+++ b/sdk/cliproxy/auth/conductor.go
@@ -2,6 +2,7 @@ package auth
 
 import (
 	"context"
+	"math"
 	"net/http"
 	"sync"
 	"sync/atomic"
@@ -10,6 +11,7 @@ import (
 	internalconfig "github.com/router-for-me/CLIProxyAPI/v8/internal/config"
 	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v8/sdk/cliproxy/executor"
 	"github.com/router-for-me/CLIProxyAPI/v8/sdk/pluginapi"
+	"golang.org/x/sync/semaphore"
 )
 
 // ProviderExecutor defines the contract required by Manager to execute provider calls.
@@ -208,6 +210,11 @@ type Manager struct {
 	refreshLocks sync.Map
 	// persistLocks serializes disk persistence per auth ID and guards against out-of-order writes.
 	persistLocks sync.Map
+	// authMutationLocks coordinate credential mutations without blocking unrelated readers.
+	authMutationLocks sync.Map
+	// authLoadGate allows concurrent credential transactions, but excludes whole-store reloads.
+	// Mutations acquire one permit; Load acquires all permits before reading the store.
+	authLoadGate *semaphore.Weighted
 }
 
 // NewManager constructs a manager with optional custom selector and hook.
@@ -220,6 +227,7 @@ func NewManager(store Store, selector Selector, hook Hook) *Manager {
 	}
 	manager := &Manager{
 		store:                 store,
+		authLoadGate:          semaphore.NewWeighted(math.MaxInt64),
 		executors:             make(map[string]ProviderExecutor),
 		selector:              selector,
 		hook:                  hook,
diff --git a/sdk/cliproxy/auth/conductor_cancellation_test.go b/sdk/cliproxy/auth/conductor_cancellation_test.go
new file mode 100644
index 000000000..c783f6e3c
--- /dev/null
+++ b/sdk/cliproxy/auth/conductor_cancellation_test.go
@@ -0,0 +1,180 @@
+package auth
+
+import (
+	"context"
+	"errors"
+	"math"
+	"sync/atomic"
+	"testing"
+	"testing/synctest"
+)
+
+type cancellationStore struct {
+	saves   atomic.Int32
+	lists   atomic.Int32
+	entered chan struct{}
+	release chan struct{}
+}
+
+func (s *cancellationStore) Save(_ context.Context, auth *Auth) (string, error) {
+	s.saves.Add(1)
+	if auth.Label == "blocked" {
+		close(s.entered)
+		<-s.release
+	}
+	return "", nil
+}
+func (s *cancellationStore) List(context.Context) ([]*Auth, error) {
+	s.lists.Add(1)
+	return nil, nil
+}
+func (*cancellationStore) Delete(context.Context, string) error { return nil }
+
+type cancellationHook struct{ calls atomic.Int32 }
+
+func (h *cancellationHook) OnAuthRegistered(context.Context, *Auth) { h.calls.Add(1) }
+func (h *cancellationHook) OnAuthUpdated(context.Context, *Auth)    { h.calls.Add(1) }
+func (*cancellationHook) OnResult(context.Context, Result)          {}
+
+func assertCanceledMutation(t *testing.T, done <-chan error) {
+	t.Helper()
+	select {
+	case err := <-done:
+		if !errors.Is(err, context.Canceled) {
+			t.Errorf("expected context cancellation, got %v", err)
+		}
+	default:
+		t.Error("canceled operation still waiting for lock")
+	}
+}
+
+func TestManagerCanceledLoadUnblocksUnrelatedMutation(t *testing.T) {
+	synctest.Test(t, func(t *testing.T) {
+		store := &cancellationStore{entered: make(chan struct{}), release: make(chan struct{})}
+		manager := NewManager(store, nil, nil)
+		saveDone := make(chan error, 1)
+		go func() {
+			_, err := manager.Register(context.Background(), &Auth{ID: "A", Provider: "audit", Label: "blocked", Metadata: map[string]any{"type": "audit"}})
+			saveDone <- err
+		}()
+		<-store.entered
+		ctx, cancel := context.WithCancel(context.Background())
+		loadDone := make(chan error, 1)
+		go func() { loadDone <- manager.Load(ctx) }()
+		synctest.Wait()
+		bDone := make(chan error, 1)
+		go func() {
+			_, err := manager.Register(context.Background(), &Auth{ID: "B", Provider: "audit"})
+			bDone <- err
+		}()
+		synctest.Wait()
+		select {
+		case <-bDone:
+			t.Error("B overtook queued reload")
+		default:
+		}
+		cancel()
+		synctest.Wait()
+		assertCanceledMutation(t, loadDone)
+		select {
+		case err := <-bDone:
+			if err != nil {
+				t.Error(err)
+			}
+		default:
+			t.Error("canceled reload still blocks unrelated B")
+		}
+		if store.lists.Load() != 0 {
+			t.Error("canceled reload called List")
+		}
+		close(store.release)
+		synctest.Wait()
+		if err := <-saveDone; err != nil {
+			t.Error(err)
+		}
+		if !manager.authLoadGate.TryAcquire(math.MaxInt64) {
+			t.Error("reload barrier permit leaked")
+		} else {
+			manager.authLoadGate.Release(math.MaxInt64)
+		}
+	})
+}
+
+func TestManagerCanceledMutationWait(t *testing.T) {
+	for _, operation := range []string{"Register", "Update", "Prepare", "Refresh"} {
+		for _, waitOn := range []string{"barrier", "gate"} {
+			t.Run(operation+"/"+waitOn, func(t *testing.T) {
+				synctest.Test(t, func(t *testing.T) {
+					store := &cancellationStore{}
+					hook := &cancellationHook{}
+					manager := NewManager(store, nil, hook)
+					base, err := manager.Register(WithSkipPersist(context.Background()), &Auth{ID: "A", Provider: "audit", Metadata: map[string]any{"type": "audit"}})
+					if err != nil {
+						t.Fatal(err)
+					}
+					hook.calls.Store(0)
+					var release func()
+					if waitOn == "barrier" {
+						if errAcquire := manager.authLoadGate.Acquire(context.Background(), math.MaxInt64); errAcquire != nil {
+							t.Fatal(errAcquire)
+						}
+						release = func() { manager.authLoadGate.Release(math.MaxInt64) }
+					} else {
+						release = manager.lockAuthMutation(base.ID)
+					}
+					ctx, cancel := context.WithCancel(context.Background())
+					done := make(chan error, 1)
+					go func() {
+						var errMutation error
+						switch operation {
+						case "Register":
+							_, errMutation = manager.Register(ctx, base.Clone())
+						case "Update":
+							_, errMutation = manager.Update(ctx, base.Clone())
+						case "Prepare":
+							_, errMutation = manager.UpdatePreparedAuth(ctx, base, base.Clone())
+						case "Refresh":
+							_, errMutation = manager.UpdateRefreshedAuth(ctx, base, base.Clone())
+						}
+						done <- errMutation
+					}()
+					synctest.Wait()
+					cancel()
+					synctest.Wait()
+					assertCanceledMutation(t, done)
+					release()
+					synctest.Wait()
+					if store.saves.Load() != 0 || hook.calls.Load() != 0 {
+						t.Error("canceled mutation invoked Save or hook")
+					}
+					if got, _ := manager.GetByID(base.ID); got.Generation != base.Generation || got.RegistrationEpoch != base.RegistrationEpoch {
+						t.Error("canceled mutation published auth")
+					}
+					if !manager.authLoadGate.TryAcquire(math.MaxInt64) {
+						t.Error("mutation leaked reload barrier permit")
+					} else {
+						manager.authLoadGate.Release(math.MaxInt64)
+					}
+					value, _ := manager.authMutationLocks.Load(base.ID)
+					if len(value.(chan struct{})) != 0 {
+						t.Error("mutation leaked credential gate")
+					}
+				})
+			})
+		}
+	}
+}
+
+func TestManagerMutationNilContext(t *testing.T) {
+	manager := NewManager(&cancellationStore{}, nil, nil)
+	auth, err := manager.Register(nil, &Auth{ID: "A", Provider: "audit", Metadata: map[string]any{"type": "audit"}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, errUpdate := manager.Update(nil, auth); errUpdate != nil {
+		t.Fatal(errUpdate)
+	}
+	if errLoad := manager.Load(nil); errLoad != nil {
+		t.Fatal(errLoad)
+	}
+}
diff --git a/sdk/cliproxy/auth/conductor_cooldown.go b/sdk/cliproxy/auth/conductor_cooldown.go
index 33f8b5d8d..8e6f08461 100644
--- a/sdk/cliproxy/auth/conductor_cooldown.go
+++ b/sdk/cliproxy/auth/conductor_cooldown.go
@@ -475,6 +475,8 @@ func (m *Manager) ResetQuota(ctx context.Context, authID string) (*Auth, []strin
 	registeredModels := modelsForRegisteredAuth(authID)
 	cooldownStateChanged := false
 
+	releaseMutation := m.lockAuthMutation(authID)
+	defer releaseMutation()
 	m.mu.Lock()
 	auth, ok := m.auths[authID]
 	if !ok || auth == nil {
@@ -524,8 +526,9 @@ func (m *Manager) ResetQuota(ctx context.Context, authID string) (*Auth, []strin
 		cooldownRecordsAfter := m.cooldownStateRecordsForAuthLocked(auth, now)
 		cooldownStateChanged = !cooldownStateRecordsEqual(cooldownRecordsBefore, cooldownRecordsAfter)
 	}
-	errPersist := m.persist(ctx, auth)
+	errPersist := m.persistLocked(ctx, auth)
 	m.mu.Unlock()
+	releaseMutation()
 
 	defer func() {
 		if cooldownStateChanged {
@@ -766,6 +769,8 @@ func (m *Manager) MarkResult(ctx context.Context, result Result) {
 	cooldownStateChanged := false
 	now := time.Now()
 
+	releaseMutation := m.lockAuthMutation(result.AuthID)
+	defer releaseMutation()
 	m.mu.Lock()
 	if auth, ok := m.auths[result.AuthID]; ok && auth != nil {
 		if modelKey == "" && strings.TrimSpace(result.RouteModel) != "" {
@@ -1016,7 +1021,7 @@ func (m *Manager) MarkResult(ctx context.Context, result Result) {
 			}
 		}
 
-		_ = m.persist(ctx, auth)
+		_ = m.persistLocked(ctx, auth)
 		authSnapshot = auth.Clone()
 		if trackCooldownState {
 			cooldownRecordsAfter := m.cooldownStateRecordsForAuthLocked(auth, now)
@@ -1024,6 +1029,7 @@ func (m *Manager) MarkResult(ctx context.Context, result Result) {
 		}
 	}
 	m.mu.Unlock()
+	releaseMutation()
 	if m.scheduler != nil && authSnapshot != nil {
 		var targetModels []string
 		if !result.CredentialScope && modelKey != "" {
@@ -1096,6 +1102,8 @@ func (m *Manager) recordAvailabilityNeutralResult(ctx context.Context, result Re
 	}
 
 	var authSnapshot *Auth
+	releaseMutation := m.lockAuthMutation(result.AuthID)
+	defer releaseMutation()
 	m.mu.Lock()
 	if auth, ok := m.auths[result.AuthID]; ok && auth != nil {
 		now := time.Now()
@@ -1107,10 +1115,11 @@ func (m *Manager) recordAvailabilityNeutralResult(ctx context.Context, result Re
 		}
 		auth.Generation++
 		auth.UpdatedAt = now
-		_ = m.persist(ctx, auth)
+		_ = m.persistLocked(ctx, auth)
 		authSnapshot = auth.Clone()
 	}
 	m.mu.Unlock()
+	releaseMutation()
 
 	m.hook.OnResult(ctx, result)
 	m.publishErrorEvent(result, authSnapshot)
diff --git a/sdk/cliproxy/auth/conductor_lifecycle.go b/sdk/cliproxy/auth/conductor_lifecycle.go
index 3fa801b26..597a7d7c3 100644
--- a/sdk/cliproxy/auth/conductor_lifecycle.go
+++ b/sdk/cliproxy/auth/conductor_lifecycle.go
@@ -3,6 +3,7 @@ package auth
 import (
 	"context"
 	"fmt"
+	"math"
 	"strings"
 	"sync"
 	"time"
@@ -88,6 +89,11 @@ func (m *Manager) Register(ctx context.Context, auth *Auth) (*Auth, error) {
 	if auth.ID == "" {
 		auth.ID = uuid.NewString()
 	}
+	releaseMutation, errMutation := m.lockAuthMutationContext(ctx, auth.ID)
+	if errMutation != nil {
+		return nil, errMutation
+	}
+	defer releaseMutation()
 	now := time.Now()
 	if auth.Generation == 0 {
 		auth.Generation = 1
@@ -114,6 +120,16 @@ func (m *Manager) Register(ctx context.Context, auth *Auth) (*Auth, error) {
 	m.authEpochs[auth.ID]++
 	auth.RegistrationEpoch = m.authEpochs[auth.ID]
 	auth.Generation = 1
+	// Serialize this credential, but release the manager lock during store I/O.
+	// Persist failures stay non-fatal, but must not be silent: a restart would
+	// lose the credential that only exists in memory.
+	if errPersist := m.persistLocked(ctx, auth); errPersist != nil {
+		log.WithFields(log.Fields{"auth_id": auth.ID, "credential": auth.ID, "provider": auth.Provider}).Warnf("failed to persist registered auth %s (%s): %v", auth.Provider, auth.ID, errPersist)
+	}
+	if m.authEpochs[auth.ID] != auth.RegistrationEpoch {
+		m.mu.Unlock()
+		return nil, fmt.Errorf("auth %s changed registration during persistence", auth.ID)
+	}
 	authClone := auth.Clone()
 	m.auths[auth.ID] = authClone
 	m.notifyAuthChangeLocked(auth.ID)
@@ -123,6 +139,7 @@ func (m *Manager) Register(ctx context.Context, auth *Auth) (*Auth, error) {
 		schedulerSnapshot = authClone.Clone()
 	}
 	m.mu.Unlock()
+	releaseMutation()
 	if !shouldDeferAPIKeyModelAliasRebuild(ctx) {
 		m.rebuildAPIKeyModelAliasFromRuntimeConfig()
 	}
@@ -131,11 +148,6 @@ func (m *Manager) Register(ctx context.Context, auth *Auth) (*Auth, error) {
 	}
 	m.structuralEpoch.Add(1)
 	m.queueRefreshReschedule(auth.ID)
-	// Persist failures stay non-fatal, but must not be silent: a restart would
-	// lose the credential that only exists in memory.
-	if errPersist := m.persist(ctx, auth); errPersist != nil {
-		log.WithFields(log.Fields{"auth_id": auth.ID, "credential": auth.ID, "provider": auth.Provider}).Warnf("failed to persist registered auth %s (%s): %v", auth.Provider, auth.ID, errPersist)
-	}
 	m.hook.OnAuthRegistered(ctx, auth.Clone())
 	if cooldownStateChanged {
 		m.persistCooldownStates(context.Background())
@@ -176,6 +188,11 @@ func (m *Manager) updateInternal(ctx context.Context, base, auth *Auth, mode upd
 	if errWeight := ValidateAuthWeight(auth); errWeight != nil {
 		return nil, fmt.Errorf("update auth: %w", errWeight)
 	}
+	releaseMutation, errMutation := m.lockAuthMutationContext(ctx, auth.ID)
+	if errMutation != nil {
+		return nil, errMutation
+	}
+	defer releaseMutation()
 	m.mu.Lock()
 	existing, ok := m.auths[auth.ID]
 	if !ok || existing == nil {
@@ -260,15 +277,26 @@ func (m *Manager) updateInternal(ctx context.Context, base, auth *Auth, mode upd
 		cooldownStateChanged = clearCooldownStateForAuth(auth, now) || cooldownStateChanged
 	}
 	auth.EnsureIndex()
-	// A minted Meta key must reach the configured store before requests can use it.
-	// Keep the epoch check, save and installation together so a concurrent reload
-	// or removal cannot let an obsolete mint overwrite the credential on disk.
+	// Save before publication, including the transactional Meta mint path.
+	// Runtime-only changes made during I/O are merged below, never overwritten.
+	existingBeforeSave := existing.Clone()
 	persistMetaMint := (mode == updateModePrepare || mode == updateModeRefresh) && strings.EqualFold(strings.TrimSpace(auth.Provider), "meta")
-	if persistMetaMint {
-		if errPersist := m.persist(ctx, auth); errPersist != nil {
+	if errPersist := m.persistLocked(ctx, auth); errPersist != nil {
+		// A minted Meta key must reach the store before requests can use it.
+		if persistMetaMint {
 			m.mu.Unlock()
 			return nil, fmt.Errorf("persist meta auth: %w", errPersist)
 		}
+		// Ordinary persistence failures remain non-fatal, but never silent.
+		log.WithFields(log.Fields{"auth_id": auth.ID, "credential": auth.ID, "provider": auth.Provider}).Warnf("failed to persist updated auth %s (%s): %v", auth.Provider, auth.ID, errPersist)
+	}
+	if m.authEpochs[auth.ID] != auth.RegistrationEpoch {
+		m.mu.Unlock()
+		return nil, fmt.Errorf("auth %s changed registration during persistence", auth.ID)
+	}
+	mergeAuthSaveDelta(auth, existingBeforeSave, existing, false)
+	if existing.Generation >= auth.Generation {
+		auth.Generation = existing.Generation + 1
 	}
 	authClone := auth.Clone()
 	m.auths[auth.ID] = authClone
@@ -279,6 +307,7 @@ func (m *Manager) updateInternal(ctx context.Context, base, auth *Auth, mode upd
 		schedulerSnapshot = authClone.Clone()
 	}
 	m.mu.Unlock()
+	releaseMutation()
 	if !shouldDeferAPIKeyModelAliasRebuild(ctx) {
 		m.rebuildAPIKeyModelAliasFromRuntimeConfig()
 	}
@@ -287,13 +316,6 @@ func (m *Manager) updateInternal(ctx context.Context, base, auth *Auth, mode upd
 	}
 	m.structuralEpoch.Add(1)
 	m.queueRefreshReschedule(auth.ID)
-	if !persistMetaMint {
-		// Persist failures stay non-fatal, but must not be silent: after a token
-		// refresh the rotated credentials only exist in memory until persisted.
-		if errPersist := m.persist(ctx, auth); errPersist != nil {
-			log.WithFields(log.Fields{"auth_id": auth.ID, "credential": auth.ID, "provider": auth.Provider}).Warnf("failed to persist updated auth %s (%s): %v", auth.Provider, auth.ID, errPersist)
-		}
-	}
 	m.hook.OnAuthUpdated(ctx, auth.Clone())
 	if cooldownStateChanged {
 		m.persistCooldownStates(context.Background())
@@ -312,6 +334,8 @@ func (m *Manager) Remove(ctx context.Context, id string) {
 		return
 	}
 	_ = ctx
+	releaseMutation := m.lockAuthMutation(id)
+	defer releaseMutation()
 
 	m.mu.Lock()
 	existing := m.auths[id]
@@ -343,6 +367,7 @@ func (m *Manager) Remove(ctx context.Context, id string) {
 	m.authEpochs[id]++
 	tombstoneEpoch := m.authEpochs[id]
 	m.mu.Unlock()
+	releaseMutation()
 
 	if !shouldDeferAPIKeyModelAliasRebuild(ctx) {
 		m.rebuildAPIKeyModelAliasFromRuntimeConfig()
@@ -376,16 +401,27 @@ func (m *Manager) invalidateSessionAffinity(authID string) {
 
 // Load resets manager state from the backing store.
 func (m *Manager) Load(ctx context.Context) error {
-	m.mu.Lock()
-	if m.store == nil {
-		m.mu.Unlock()
+	// Exclude complete Save/publication transactions, including new registrations
+	// not yet present in auths. Never wait for this barrier while holding m.mu.
+	lockCtx := ctx
+	if lockCtx == nil {
+		lockCtx = context.Background()
+	}
+	if errAcquire := m.authLoadGate.Acquire(lockCtx, math.MaxInt64); errAcquire != nil {
+		return errAcquire
+	}
+	defer m.authLoadGate.Release(math.MaxInt64)
+	m.mu.RLock()
+	store := m.store
+	m.mu.RUnlock()
+	if store == nil {
 		return nil
 	}
-	items, err := m.store.List(ctx)
+	items, err := store.List(ctx)
 	if err != nil {
-		m.mu.Unlock()
 		return err
 	}
+	m.mu.Lock()
 	previousAuths := m.auths
 	m.auths = make(map[string]*Auth, len(items))
 	if m.authEpochs == nil {
@@ -448,7 +484,10 @@ type authPersistLock struct {
 }
 
 func (m *Manager) persist(ctx context.Context, auth *Auth) error {
-	if m.store == nil || auth == nil {
+	m.mu.RLock()
+	store := m.store
+	m.mu.RUnlock()
+	if store == nil || auth == nil {
 		return nil
 	}
 	if errWeight := ValidateAuthWeight(auth); errWeight != nil {
@@ -483,13 +522,13 @@ func (m *Manager) persist(ctx context.Context, auth *Auth) error {
 		if shouldSkipPersist(ctx) {
 			return nil
 		}
-		_, err := m.store.Save(ctx, auth)
+		_, err := store.Save(ctx, auth)
 		return err
 	}
 
 	if shouldSkipPersist(ctx) {
 		return nil
 	}
-	_, err := m.store.Save(ctx, auth)
+	_, err := store.Save(ctx, auth)
 	return err
 }
diff --git a/sdk/cliproxy/auth/conductor_load_persistence_test.go b/sdk/cliproxy/auth/conductor_load_persistence_test.go
new file mode 100644
index 000000000..6507b550b
--- /dev/null
+++ b/sdk/cliproxy/auth/conductor_load_persistence_test.go
@@ -0,0 +1,196 @@
+package auth
+
+import (
+	"context"
+	"errors"
+	"reflect"
+	"sync"
+	"testing"
+	"testing/synctest"
+
+	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v8/sdk/cliproxy/executor"
+)
+
+// reloadAuthStore snapshots records independently of blocked storage I/O.
+type reloadAuthStore struct {
+	mu          sync.Mutex
+	records     map[string]*Auth
+	saveEntered chan struct{}
+	saveRelease chan struct{}
+	listEntered chan struct{}
+	listRelease chan struct{}
+}
+
+func (*reloadAuthStore) Delete(context.Context, string) error { return nil }
+func (s *reloadAuthStore) Save(_ context.Context, auth *Auth) (string, error) {
+	if s.saveEntered != nil {
+		close(s.saveEntered)
+		<-s.saveRelease
+	}
+	auth.FileName = auth.ID + ".json"
+	s.mu.Lock()
+	s.records[auth.ID] = auth.Clone()
+	s.mu.Unlock()
+	return auth.FileName, nil
+}
+func (s *reloadAuthStore) List(context.Context) ([]*Auth, error) {
+	s.mu.Lock()
+	items := make([]*Auth, 0, len(s.records))
+	for _, auth := range s.records {
+		items = append(items, auth.Clone())
+	}
+	s.mu.Unlock()
+	close(s.listEntered)
+	if s.listRelease != nil {
+		<-s.listRelease
+	}
+	return items, nil
+}
+
+func assertUnrelatedAuthReadable(t *testing.T, manager *Manager) {
+	t.Helper()
+	done := make(chan error, 1)
+	go func() {
+		if _, ok := manager.GetByID("B"); !ok {
+			done <- errors.New("B disappeared")
+			return
+		}
+		selected, err := manager.SelectAuth(context.Background(), "audit-b", "", cliproxyexecutor.Options{})
+		if err == nil && (selected == nil || selected.ID != "B") {
+			err = errors.New("did not select B")
+		}
+		done <- err
+	}()
+	synctest.Wait()
+	select {
+	case err := <-done:
+		if err != nil {
+			t.Error(err)
+		}
+	default:
+		t.Error("storage I/O blocked reading/selecting unrelated B")
+	}
+}
+
+func TestManagerBlockedSaveSerializesLoad(t *testing.T) {
+	for _, operation := range []string{"Register", "ReRegister", "Update", "Prepare", "Refresh", "MarkResult"} {
+		t.Run(operation, func(t *testing.T) {
+			synctest.Test(t, func(t *testing.T) {
+				ctx := context.Background()
+				store := &reloadAuthStore{records: make(map[string]*Auth), saveEntered: make(chan struct{}), saveRelease: make(chan struct{}), listEntered: make(chan struct{})}
+				manager := NewManager(store, nil, nil)
+				manager.RegisterExecutor(&aliasRoutingExecutor{id: "audit-b"})
+				b, err := manager.Register(WithSkipPersist(ctx), &Auth{ID: "B", Provider: "audit-b", Status: StatusActive})
+				if err != nil {
+					t.Fatal(err)
+				}
+				store.records[b.ID] = b.Clone()
+				base := &Auth{ID: "A", Provider: "meta", Status: StatusActive, Metadata: map[string]any{"access_token": "old"}}
+				if operation != "Register" {
+					base, err = manager.Register(WithSkipPersist(ctx), base)
+					if err != nil {
+						t.Fatal(err)
+					}
+					store.records[base.ID] = base.Clone()
+				}
+				updated := base.Clone()
+				updated.Metadata["access_token"] = "minted"
+				saveDone := make(chan error, 1)
+				go func() {
+					var errSave error
+					switch operation {
+					case "Register", "ReRegister":
+						_, errSave = manager.Register(ctx, updated)
+					case "Update":
+						_, errSave = manager.Update(ctx, updated)
+					case "Prepare":
+						_, errSave = manager.UpdatePreparedAuth(ctx, base, updated)
+					case "Refresh":
+						_, errSave = manager.UpdateRefreshedAuth(ctx, base, updated)
+					case "MarkResult":
+						manager.MarkResult(ctx, Result{AuthID: base.ID, Provider: base.Provider, Success: true})
+					}
+					saveDone <- errSave
+				}()
+				<-store.saveEntered
+				loadDone := make(chan error, 1)
+				go func() { loadDone <- manager.Load(ctx) }()
+				synctest.Wait()
+				select {
+				case <-store.listEntered:
+					t.Error("Load read stale records before Save/publication completed")
+				default:
+				}
+				assertUnrelatedAuthReadable(t, manager)
+				close(store.saveRelease)
+				if errSave := <-saveDone; errSave != nil {
+					t.Errorf("save/publication failed: %v", errSave)
+				}
+				if errLoad := <-loadDone; errLoad != nil {
+					t.Fatal(errLoad)
+				}
+				got, ok := manager.GetByID(base.ID)
+				if !ok {
+					t.Fatal("Load lost the saved credential")
+				}
+				store.mu.Lock()
+				saved := store.records[base.ID].Clone()
+				store.mu.Unlock()
+				if got.RegistrationEpoch <= saved.RegistrationEpoch {
+					t.Error("Load did not run after save/publication")
+				}
+				saved.RegistrationEpoch, saved.Generation = got.RegistrationEpoch, got.Generation
+				if !reflect.DeepEqual(saved, got) {
+					t.Errorf("store and manager diverged: saved=%+v got=%+v", saved, got)
+				}
+				manager.scheduler.mu.Lock()
+				scheduled := manager.scheduler.providers["meta"].auths[base.ID].auth.Clone()
+				manager.scheduler.mu.Unlock()
+				if !reflect.DeepEqual(got, scheduled) {
+					t.Error("scheduler differs from reloaded credential")
+				}
+			})
+		})
+	}
+}
+
+func TestManagerBlockedLoadSerializesNewRegistration(t *testing.T) {
+	synctest.Test(t, func(t *testing.T) {
+		ctx := context.Background()
+		store := &reloadAuthStore{records: make(map[string]*Auth), saveEntered: make(chan struct{}), saveRelease: make(chan struct{}), listEntered: make(chan struct{}), listRelease: make(chan struct{})}
+		manager := NewManager(store, nil, nil)
+		manager.RegisterExecutor(&aliasRoutingExecutor{id: "audit-b"})
+		b, err := manager.Register(WithSkipPersist(ctx), &Auth{ID: "B", Provider: "audit-b", Status: StatusActive})
+		if err != nil {
+			t.Fatal(err)
+		}
+		store.records[b.ID] = b.Clone()
+		loadDone := make(chan error, 1)
+		go func() { loadDone <- manager.Load(ctx) }()
+		<-store.listEntered
+		saveDone := make(chan error, 1)
+		go func() {
+			_, errRegister := manager.Register(ctx, &Auth{ID: "new", Provider: "audit", Metadata: map[string]any{"type": "audit"}})
+			saveDone <- errRegister
+		}()
+		synctest.Wait()
+		select {
+		case <-store.saveEntered:
+			t.Error("new registration overtook Load's whole-map replacement")
+		default:
+		}
+		assertUnrelatedAuthReadable(t, manager)
+		close(store.listRelease)
+		if errLoad := <-loadDone; errLoad != nil {
+			t.Fatal(errLoad)
+		}
+		<-store.saveEntered
+		close(store.saveRelease)
+		if errSave := <-saveDone; errSave != nil {
+			t.Fatal(errSave)
+		}
+		if got, ok := manager.GetByID("new"); !ok || got.FileName != "new.json" {
+			t.Fatal("Load discarded a new registration")
+		}
+	})
+}
diff --git a/sdk/cliproxy/auth/conductor_persistence.go b/sdk/cliproxy/auth/conductor_persistence.go
new file mode 100644
index 000000000..72739c054
--- /dev/null
+++ b/sdk/cliproxy/auth/conductor_persistence.go
@@ -0,0 +1,113 @@
+package auth
+
+import (
+	"context"
+	"reflect"
+	"sync"
+)
+
+// lockAuthMutation acquires the reload barrier, then the credential gate, before
+// m.mu. Keep both until publication completes. Load never takes credential or
+// refresh locks. Store callbacks may read the manager, but must not mutate it.
+func (m *Manager) lockAuthMutation(id string) func() {
+	release, _ := m.lockAuthMutationContext(context.Background(), id)
+	return release
+}
+
+// lockAuthMutationContext lets fallible mutations cancel either lock wait.
+func (m *Manager) lockAuthMutationContext(ctx context.Context, id string) (func(), error) {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	if errAcquire := m.authLoadGate.Acquire(ctx, 1); errAcquire != nil {
+		return nil, errAcquire
+	}
+	value, _ := m.authMutationLocks.LoadOrStore(id, make(chan struct{}, 1))
+	gate := value.(chan struct{})
+	select {
+	case gate <- struct{}{}:
+		// Cancellation may race with the gate becoming available.
+		if errContext := ctx.Err(); errContext != nil {
+			<-gate
+			m.authLoadGate.Release(1)
+			return nil, errContext
+		}
+	case <-ctx.Done():
+		m.authLoadGate.Release(1)
+		return nil, ctx.Err()
+	}
+	var once sync.Once
+	return func() {
+		once.Do(func() {
+			<-gate
+			m.authLoadGate.Release(1)
+		})
+	}, nil
+}
+
+// persistLocked requires m.mu and the credential mutation gate. Never pass a
+// published object to Store.Save: readers and runtime-only writers remain live
+// during I/O. Only the store's delta is merged back, preserving intervening edits.
+func (m *Manager) persistLocked(ctx context.Context, auth *Auth) error {
+	before := auth.Clone()
+	saved := auth.Clone()
+	m.mu.Unlock()
+	err := m.persist(ctx, saved)
+	m.mu.Lock()
+	mergeAuthSaveDelta(auth, before, saved, true)
+	return err
+}
+
+// mergeAuthSaveDelta handles all exported value fields, not a store-specific
+// allowlist. Map entries are independent fields; nested values are atomic.
+// Identity/version fields belong exclusively to the manager. Store-owned shared
+// objects must be replaced rather than mutated in place (see Store.Save).
+func mergeAuthSaveDelta(target, before, after *Auth, preserveConcurrent bool) {
+	dst := reflect.ValueOf(target).Elem()
+	base := reflect.ValueOf(before).Elem()
+	next := reflect.ValueOf(after).Elem()
+	for i := 0; i < dst.NumField(); i++ {
+		field := dst.Type().Field(i)
+		if field.PkgPath != "" || field.Name == "ID" || field.Name == "RegistrationEpoch" || field.Name == "Generation" {
+			continue
+		}
+		d, b, n := dst.Field(i), base.Field(i), next.Field(i)
+		if reflect.DeepEqual(b.Interface(), n.Interface()) {
+			continue
+		}
+		if reflect.DeepEqual(d.Interface(), b.Interface()) {
+			d.Set(n)
+			continue
+		}
+		if d.Kind() == reflect.Map {
+			keys := make(map[any]reflect.Value)
+			for _, key := range b.MapKeys() {
+				keys[key.Interface()] = key
+			}
+			for _, key := range n.MapKeys() {
+				keys[key.Interface()] = key
+			}
+			for _, key := range keys {
+				oldValue, newValue := b.MapIndex(key), n.MapIndex(key)
+				if equalSaveValue(oldValue, newValue) || (preserveConcurrent && !equalSaveValue(d.MapIndex(key), oldValue)) {
+					continue
+				}
+				if d.IsNil() {
+					d.Set(reflect.MakeMap(d.Type()))
+				}
+				d.SetMapIndex(key, newValue)
+			}
+			continue
+		}
+		if !preserveConcurrent {
+			d.Set(n)
+		}
+	}
+}
+
+func equalSaveValue(a, b reflect.Value) bool {
+	if !a.IsValid() || !b.IsValid() {
+		return a.IsValid() == b.IsValid()
+	}
+	return reflect.DeepEqual(a.Interface(), b.Interface())
+}
diff --git a/sdk/cliproxy/auth/conductor_refresh.go b/sdk/cliproxy/auth/conductor_refresh.go
index a92e6b5c2..285f83e43 100644
--- a/sdk/cliproxy/auth/conductor_refresh.go
+++ b/sdk/cliproxy/auth/conductor_refresh.go
@@ -786,7 +786,9 @@ func (m *Manager) refreshAuthForRequestAtEpoch(ctx context.Context, id, failedAc
 	if m.shouldRefresh(updated, now) {
 		updated.NextRefreshAfter = now.Add(refreshIneffectiveBackoff)
 	}
-	saved, errUpdate := m.UpdateRefreshedAuth(ctx, base, updated)
+	// A successful refresh may have rotated upstream tokens after cancellation.
+	// Commit its result with context values intact; keep epoch checks and save ordering.
+	saved, errUpdate := m.UpdateRefreshedAuth(context.WithoutCancel(ctx), base, updated)
 	if errUpdate != nil {
 		// Warn, not debug: a restart after a lost persist fails with invalid_grant.
 		log.WithFields(log.Fields{"auth_id": auth.ID, "credential": auth.ID, "provider": auth.Provider}).Warnf("persist refreshed auth %s (%s) failed: %v", auth.Provider, auth.ID, errUpdate)
diff --git a/sdk/cliproxy/auth/conductor_saved_fields_test.go b/sdk/cliproxy/auth/conductor_saved_fields_test.go
new file mode 100644
index 000000000..ec88b3325
--- /dev/null
+++ b/sdk/cliproxy/auth/conductor_saved_fields_test.go
@@ -0,0 +1,521 @@
+package auth
+
+import (
+	"context"
+	"errors"
+	"reflect"
+	"sync"
+	"testing"
+	"testing/synctest"
+	"time"
+
+	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v8/sdk/cliproxy/executor"
+)
+
+type enrichingAuthStore struct{ err error }
+
+func (*enrichingAuthStore) List(context.Context) ([]*Auth, error) { return nil, nil }
+func (*enrichingAuthStore) Delete(context.Context, string) error  { return nil }
+func (s *enrichingAuthStore) Save(_ context.Context, auth *Auth) (string, error) {
+	if auth.Attributes == nil {
+		auth.Attributes = make(map[string]string)
+	}
+	auth.Attributes[AttributePath] = "/fixture/" + auth.ID + ".json"
+	auth.Attributes[AttributeSource] = auth.Attributes[AttributePath]
+	auth.Attributes[AttributeSourceBackend] = AuthSourceFile
+	auth.FileName = auth.ID + ".json"
+	auth.Metadata["disabled"] = auth.Disabled
+	return auth.Attributes[AttributePath], s.err
+}
+
+type savedFieldsHook struct{ auth *Auth }
+
+func (h *savedFieldsHook) OnAuthRegistered(_ context.Context, auth *Auth) { h.auth = auth.Clone() }
+func (h *savedFieldsHook) OnAuthUpdated(_ context.Context, auth *Auth)    { h.auth = auth.Clone() }
+func (*savedFieldsHook) OnResult(context.Context, Result)                 {}
+
+func TestManagerSavedFieldsPublished(t *testing.T) {
+	for _, saveErr := range []error{nil, errors.New("save failed after enrichment")} {
+		name := "success"
+		if saveErr != nil {
+			name = "failure"
+		}
+		t.Run(name, func(t *testing.T) {
+			testManagerSavedFieldsPublished(t, saveErr)
+		})
+	}
+}
+
+func testManagerSavedFieldsPublished(t *testing.T, saveErr error) {
+	for _, operation := range []string{"Register", "Update", "Prepare", "Refresh"} {
+		t.Run(operation, func(t *testing.T) {
+			ctx := context.Background()
+			hook := &savedFieldsHook{}
+			manager := NewManager(&enrichingAuthStore{err: saveErr}, nil, hook)
+			input := &Auth{ID: "saved-fields", Provider: "audit", Status: StatusActive, Metadata: map[string]any{"type": "audit"}}
+			var returned *Auth
+			var err error
+			if operation == "Register" {
+				returned, err = manager.Register(ctx, input)
+			} else {
+				base, errRegister := manager.Register(ctx, input)
+				if errRegister != nil {
+					t.Fatal(errRegister)
+				}
+				input = base.Clone()
+				input.FileName = ""
+				input.Attributes = nil
+				delete(input.Metadata, "disabled")
+				switch operation {
+				case "Update":
+					returned, err = manager.Update(ctx, input)
+				case "Prepare":
+					returned, err = manager.UpdatePreparedAuth(ctx, base, input)
+				case "Refresh":
+					returned, err = manager.UpdateRefreshedAuth(ctx, base, input)
+				}
+			}
+			if err != nil {
+				t.Fatal(err)
+			}
+			published, ok := manager.GetByID(input.ID)
+			if !ok {
+				t.Fatal("missing published auth")
+			}
+			for name, snapshot := range map[string]*Auth{"manager": published, "return": returned, "hook": hook.auth} {
+				if snapshot == nil || snapshot.FileName != "saved-fields.json" || snapshot.Attributes[AttributePath] != "/fixture/saved-fields.json" || snapshot.Attributes[AttributeSource] != "/fixture/saved-fields.json" || snapshot.Attributes[AttributeSourceBackend] != AuthSourceFile || snapshot.Metadata["disabled"] != false {
+					t.Errorf("%s snapshot missing Store.Save enrichment: %+v", name, snapshot)
+				}
+				if !reflect.DeepEqual(snapshot, published) {
+					t.Errorf("%s snapshot differs from manager", name)
+				}
+			}
+			manager.scheduler.mu.Lock()
+			scheduled := manager.scheduler.providers["audit"].auths[input.ID].auth.Clone()
+			manager.scheduler.mu.Unlock()
+			if !reflect.DeepEqual(scheduled, published) {
+				t.Error("scheduler snapshot differs from manager")
+			}
+		})
+	}
+}
+
+// blockingEnrichingAuthStore pauses one save before enriching the auth.
+type blockingEnrichingAuthStore struct {
+	enrichingAuthStore
+	entered chan struct{}
+	release chan struct{}
+	once    sync.Once
+	mu      sync.Mutex
+	saved   []*Auth
+}
+
+func (s *blockingEnrichingAuthStore) Save(ctx context.Context, auth *Auth) (string, error) {
+	s.once.Do(func() {
+		close(s.entered)
+		<-s.release
+	})
+	path, err := s.enrichingAuthStore.Save(ctx, auth)
+	s.mu.Lock()
+	s.saved = append(s.saved, auth.Clone())
+	s.mu.Unlock()
+	return path, err
+}
+
+func TestManagerSavedFieldsConcurrentLifecycle(t *testing.T) {
+	for _, saveErr := range []error{nil, errors.New("save failed after enrichment")} {
+		name := "success"
+		if saveErr != nil {
+			name = "failure"
+		}
+		t.Run(name, func(t *testing.T) { testManagerSavedFieldsConcurrentLifecycle(t, saveErr) })
+	}
+}
+
+func testManagerSavedFieldsConcurrentLifecycle(t *testing.T, saveErr error) {
+	for _, operation := range []string{"Register", "Update"} {
+		for _, concurrent := range []string{"MarkResult", "Update", "Remove", "ReRegister"} {
+			t.Run(operation+"/"+concurrent, func(t *testing.T) {
+				synctest.Test(t, func(t *testing.T) {
+					ctx := context.Background()
+					store := &blockingEnrichingAuthStore{enrichingAuthStore: enrichingAuthStore{err: saveErr}, entered: make(chan struct{}), release: make(chan struct{})}
+					var releaseOnce sync.Once
+					release := func() { releaseOnce.Do(func() { close(store.release) }) }
+					defer release()
+					manager := NewManager(store, nil, nil)
+					input := &Auth{ID: "saved-fields", Provider: "audit", Status: StatusActive, Label: "old", Metadata: map[string]any{"type": "audit"}}
+					if operation == "Update" {
+						var errRegister error
+						input, errRegister = manager.Register(WithSkipPersist(ctx), input)
+						if errRegister != nil {
+							t.Fatal(errRegister)
+						}
+					}
+					next := input.Clone()
+					next.Label = "new"
+					done := make(chan error, 1)
+					go func() {
+						var err error
+						if operation == "Register" {
+							_, err = manager.Register(ctx, input)
+						} else {
+							_, err = manager.Update(ctx, input)
+						}
+						done <- err
+					}()
+					<-store.entered
+					started := make(chan struct{})
+					concurrentDone := make(chan error, 1)
+					go func() {
+						close(started)
+						var err error
+						switch concurrent {
+						case "MarkResult":
+							manager.MarkResult(ctx, Result{AuthID: next.ID, Provider: next.Provider, Model: "model", Error: &Error{HTTPStatus: 429, Message: "quota exceeded"}})
+						case "Update":
+							_, err = manager.Update(ctx, next)
+						case "Remove":
+							manager.Remove(ctx, next.ID)
+						case "ReRegister":
+							manager.Remove(ctx, next.ID)
+							_, err = manager.Register(ctx, next)
+						}
+						concurrentDone <- err
+					}()
+					<-started
+					synctest.Wait()
+					select {
+					case <-concurrentDone:
+						t.Fatal("same-credential mutation completed before the active save")
+					default:
+					}
+					release()
+					if errDone := <-done; errDone != nil {
+						t.Fatal(errDone)
+					}
+					if errConcurrent := <-concurrentDone; errConcurrent != nil {
+						t.Fatal(errConcurrent)
+					}
+					published, ok := manager.GetByID(input.ID)
+					manager.scheduler.mu.Lock()
+					var scheduled *Auth
+					if provider := manager.scheduler.providers["audit"]; provider != nil {
+						if meta := provider.auths[input.ID]; meta != nil {
+							scheduled = meta.auth.Clone()
+						}
+					}
+					manager.scheduler.mu.Unlock()
+					if concurrent == "Remove" {
+						if ok || scheduled != nil {
+							t.Fatal("completed save resurrected removed auth")
+						}
+						return
+					}
+					if !ok || published.FileName != "saved-fields.json" || published.Attributes[AttributePath] != "/fixture/saved-fields.json" {
+						t.Fatalf("missing saved fields: %+v", published)
+					}
+					if concurrent == "MarkResult" {
+						state := published.ModelStates["model"]
+						if published.Failed != 1 || published.LastError == nil || state == nil || !state.Quota.Exceeded || !state.Unavailable {
+							t.Fatalf("save overwrote concurrent result: %+v", published)
+						}
+					} else if published.Label != "new" {
+						t.Fatalf("save overwrote newer lifecycle state: %+v", published)
+					}
+					if !reflect.DeepEqual(scheduled, published) {
+						t.Fatal("scheduler retained an obsolete save snapshot")
+					}
+					store.mu.Lock()
+					saved := store.saved[len(store.saved)-1].Clone()
+					store.mu.Unlock()
+					if !reflect.DeepEqual(saved, published) {
+						t.Fatal("store retained an obsolete auth version")
+					}
+					if concurrent == "ReRegister" {
+						if published.RegistrationEpoch <= input.RegistrationEpoch {
+							t.Fatal("re-registration did not advance epoch")
+						}
+						if _, errUpdate := manager.UpdateRefreshedAuth(ctx, input, input.Clone()); errUpdate == nil {
+							t.Fatal("accepted stale registration after re-register")
+						}
+					}
+				})
+			})
+		}
+	}
+}
+
+func TestManagerBlockedSaveAllowsUnrelatedCredential(t *testing.T) {
+	for _, operation := range []string{"Register", "Update"} {
+		t.Run(operation, func(t *testing.T) {
+			ctx := context.Background()
+			store := &blockingEnrichingAuthStore{entered: make(chan struct{}), release: make(chan struct{})}
+			manager := NewManager(store, nil, nil)
+			manager.RegisterExecutor(&aliasRoutingExecutor{id: "audit"})
+			if _, err := manager.Register(WithSkipPersist(ctx), &Auth{ID: "B", Provider: "audit", Status: StatusActive}); err != nil {
+				t.Fatal(err)
+			}
+			input := &Auth{ID: "A", Provider: "audit-a", Status: StatusActive, Metadata: map[string]any{"type": "audit-a"}}
+			if operation == "Update" {
+				if _, err := manager.Register(WithSkipPersist(ctx), input); err != nil {
+					t.Fatal(err)
+				}
+			}
+			done := make(chan struct{})
+			go func() {
+				defer close(done)
+				if operation == "Register" {
+					_, _ = manager.Register(ctx, input)
+				} else {
+					_, _ = manager.Update(ctx, input)
+				}
+			}()
+			<-store.entered
+			readDone := make(chan error, 1)
+			go func() {
+				if _, ok := manager.GetByID("B"); !ok {
+					readDone <- errors.New("missing B")
+					return
+				}
+				selected, err := manager.SelectAuth(ctx, "audit", "", cliproxyexecutor.Options{})
+				if err == nil && (selected == nil || selected.ID != "B") {
+					err = errors.New("did not select B")
+				}
+				readDone <- err
+			}()
+			select {
+			case err := <-readDone:
+				if err != nil {
+					t.Error(err)
+				}
+			case <-time.After(2 * time.Second):
+				t.Error("blocked Save(A) prevented reading/selecting unrelated B")
+			}
+			close(store.release)
+			<-done
+		})
+	}
+}
+
+type callbackAuthStore struct{ save func(*Auth) error }
+
+func (*callbackAuthStore) List(context.Context) ([]*Auth, error) { return nil, nil }
+func (*callbackAuthStore) Delete(context.Context, string) error  { return nil }
+func (s *callbackAuthStore) Save(_ context.Context, auth *Auth) (string, error) {
+	return "", s.save(auth)
+}
+
+func TestManagerSaveReadCallbackAndCustomFields(t *testing.T) {
+	synctest.Test(t, func(t *testing.T) {
+		ctx := context.Background()
+		store := &callbackAuthStore{}
+		manager := NewManager(store, nil, nil)
+		store.save = func(auth *Auth) error {
+			manager.GetByID(auth.ID)
+			manager.List()
+			auth.Prefix = "custom-prefix"
+			auth.ProxyURL = "http://custom.invalid"
+			auth.Metadata["custom"] = map[string]any{"value": "saved"}
+			delete(auth.Metadata, "remove")
+			return nil
+		}
+		for _, operation := range []string{"Register", "Update"} {
+			input := &Auth{ID: "callback", Provider: "audit", Status: StatusActive, Metadata: map[string]any{"remove": true}}
+			var result *Auth
+			var err error
+			if operation == "Register" {
+				result, err = manager.Register(ctx, input)
+			} else {
+				result, err = manager.Update(ctx, input)
+			}
+			if err != nil {
+				t.Fatal(err)
+			}
+			got, _ := manager.GetByID(input.ID)
+			if got.Prefix != "custom-prefix" || got.ProxyURL != "http://custom.invalid" || got.Metadata["custom"] == nil {
+				t.Fatalf("custom store fields missing: %+v", got)
+			}
+			if _, ok := got.Metadata["remove"]; ok {
+				t.Fatal("store deletion lost")
+			}
+			if !reflect.DeepEqual(result, got) {
+				t.Fatal("return differs from manager")
+			}
+		}
+	})
+}
+
+func TestManagerSavePreservesConcurrentRefreshState(t *testing.T) {
+	for _, operation := range []string{"Update", "MarkResult"} {
+		t.Run(operation, func(t *testing.T) {
+			synctest.Test(t, func(t *testing.T) {
+				ctx := context.Background()
+				store := &blockingEnrichingAuthStore{entered: make(chan struct{}), release: make(chan struct{})}
+				manager := NewManager(store, nil, nil)
+				base, err := manager.Register(WithSkipPersist(ctx), &Auth{ID: "runtime", Provider: "audit", Status: StatusActive, Metadata: map[string]any{"type": "audit"}})
+				if err != nil {
+					t.Fatal(err)
+				}
+				done := make(chan struct{})
+				go func() {
+					defer close(done)
+					if operation == "Update" {
+						_, _ = manager.Update(ctx, base.Clone())
+					} else {
+						manager.MarkResult(ctx, Result{AuthID: base.ID, Provider: base.Provider, Success: true})
+					}
+				}()
+				<-store.entered
+				job := manager.markRefreshPending(nil, base.ID, base.RegistrationEpoch, time.Now())
+				if job == nil {
+					t.Fatal("failed to schedule concurrent refresh")
+				}
+				close(store.release)
+				<-done
+				got, _ := manager.GetByID(base.ID)
+				if !got.NextRefreshAfter.Equal(job.pendingUntil) {
+					t.Fatal("save lost concurrent refresh scheduling")
+				}
+				if got.Attributes[AttributePath] == "" {
+					t.Fatal("save enrichment lost")
+				}
+				if operation == "MarkResult" && got.Success != 1 {
+					t.Fatal("save lost result counter")
+				}
+			})
+		})
+	}
+}
+
+func TestManagerSavedFieldsSkipPersistence(t *testing.T) {
+	ctx := context.Background()
+	store := &callbackAuthStore{save: func(*Auth) error { t.Fatal("unexpected Save"); return nil }}
+	for _, mode := range []string{"context", "nil-metadata", "runtime-only", "config-api-key", "plugin-virtual"} {
+		t.Run(mode, func(t *testing.T) {
+			manager := NewManager(store, nil, nil)
+			input := &Auth{ID: mode, Provider: "audit", Status: StatusActive, Metadata: map[string]any{"type": "audit"}}
+			saveCtx := ctx
+			switch mode {
+			case "context":
+				saveCtx = WithSkipPersist(ctx)
+			case "nil-metadata":
+				input.Metadata = nil
+			case "runtime-only":
+				input.Attributes = map[string]string{"runtime_only": "true"}
+			case "config-api-key":
+				input.Attributes = map[string]string{"source": "config", "api_key": "test"}
+			case "plugin-virtual":
+				MarkPluginVirtualAuth(input, "fixture", 0)
+			}
+			for _, operation := range []string{"Register", "Update"} {
+				var result *Auth
+				var err error
+				if operation == "Register" {
+					result, err = manager.Register(saveCtx, input)
+				} else {
+					result, err = manager.Update(saveCtx, input)
+				}
+				if err != nil {
+					t.Fatal(err)
+				}
+				got, _ := manager.GetByID(input.ID)
+				if !reflect.DeepEqual(got, result) {
+					t.Fatal("skip return differs from manager")
+				}
+			}
+		})
+	}
+}
+
+func TestMergeAuthSaveDeltaMapChanges(t *testing.T) {
+	t.Run("empty-map", func(t *testing.T) {
+		before := &Auth{}
+		after := &Auth{Attributes: map[string]string{}, Metadata: map[string]any{}}
+		target := before.Clone()
+		mergeAuthSaveDelta(target, before, after, true)
+		if !reflect.DeepEqual(target, after) {
+			t.Fatal("lost explicit empty map enrichment")
+		}
+	})
+	t.Run("delete-map-preserves-concurrent-key", func(t *testing.T) {
+		before := &Auth{Metadata: map[string]any{"old": true}}
+		after := before.Clone()
+		after.Metadata = nil
+		target := before.Clone()
+		target.Metadata["concurrent"] = true
+		mergeAuthSaveDelta(target, before, after, true)
+		if len(target.Metadata) != 1 || target.Metadata["concurrent"] != true {
+			t.Fatalf("map deletion lost: %v", target.Metadata)
+		}
+	})
+	t.Run("conflicts", func(t *testing.T) {
+		before := &Auth{Label: "old", Metadata: map[string]any{"same": "old", "other": "old"}}
+		after := before.Clone()
+		after.Label = "store"
+		after.Metadata["same"] = "store"
+		after.Metadata["other"] = "store"
+		target := before.Clone()
+		target.Label = "runtime"
+		target.Metadata["same"] = "runtime"
+		mergeAuthSaveDelta(target, before, after, true)
+		if target.Label != "runtime" || target.Metadata["same"] != "runtime" || target.Metadata["other"] != "store" {
+			t.Fatalf("incorrect merge: %+v", target)
+		}
+	})
+}
+
+func TestManagerSavedFieldsMetaMintPublication(t *testing.T) {
+	for _, operation := range []string{"Prepare", "Refresh"} {
+		for _, fail := range []bool{false, true} {
+			name := operation + "/success"
+			if fail {
+				name = operation + "/failure"
+			}
+			t.Run(name, func(t *testing.T) {
+				synctest.Test(t, func(t *testing.T) {
+					ctx := context.Background()
+					store := &blockingEnrichingAuthStore{entered: make(chan struct{}), release: make(chan struct{})}
+					if fail {
+						store.err = errors.New("mint save failed")
+					}
+					hook := &savedFieldsHook{}
+					manager := NewManager(store, nil, hook)
+					base, err := manager.Register(WithSkipPersist(ctx), &Auth{ID: "meta-mint", Provider: "meta", Status: StatusActive, Metadata: map[string]any{"access_token": "old"}})
+					if err != nil {
+						t.Fatal(err)
+					}
+					updated := base.Clone()
+					updated.Metadata["access_token"] = "minted"
+					done := make(chan struct{})
+					var returned *Auth
+					var errUpdate error
+					go func() {
+						defer close(done)
+						if operation == "Prepare" {
+							returned, errUpdate = manager.UpdatePreparedAuth(ctx, base, updated)
+						} else {
+							returned, errUpdate = manager.UpdateRefreshedAuth(ctx, base, updated)
+						}
+					}()
+					<-store.entered
+					pending, _ := manager.GetByID(base.ID)
+					if !reflect.DeepEqual(base, pending) {
+						t.Fatal("mint published before persistence completed")
+					}
+					close(store.release)
+					<-done
+					got, _ := manager.GetByID(base.ID)
+					if fail {
+						if errUpdate == nil || returned != nil || !reflect.DeepEqual(base, got) || !reflect.DeepEqual(base, hook.auth) {
+							t.Fatal("failed Meta mint changed published state")
+						}
+					} else {
+						if errUpdate != nil || got.Metadata["access_token"] != "minted" || got.FileName == "" || !reflect.DeepEqual(got, returned) || !reflect.DeepEqual(got, hook.auth) {
+							t.Fatalf("successful mint snapshots differ: %v", errUpdate)
+						}
+					}
+				})
+			})
+		}
+	}
+}
diff --git a/sdk/cliproxy/auth/conductor_selection.go b/sdk/cliproxy/auth/conductor_selection.go
index 4464cac36..755e81c00 100644
--- a/sdk/cliproxy/auth/conductor_selection.go
+++ b/sdk/cliproxy/auth/conductor_selection.go
@@ -213,6 +213,8 @@ func (m *Manager) ReconcileRegistryModelStates(ctx context.Context, authID strin
 		cooldownStateChanged bool
 	)
 
+	releaseMutation := m.lockAuthMutation(authID)
+	defer releaseMutation()
 	m.mu.Lock()
 	auth, ok := m.auths[authID]
 	if ok && auth != nil {
@@ -347,7 +349,7 @@ func (m *Manager) ReconcileRegistryModelStates(ctx context.Context, authID strin
 					}
 					auth.Generation++
 					auth.UpdatedAt = now
-					if errPersist := m.persist(context.Background(), auth); errPersist != nil {
+					if errPersist := m.persistLocked(context.Background(), auth); errPersist != nil {
 						logEntryWithRequestID(ctx).WithField("auth_id", auth.ID).Warnf("failed to persist auth changes during model state reconciliation: %v", errPersist)
 					}
 				}
@@ -361,6 +363,7 @@ func (m *Manager) ReconcileRegistryModelStates(ctx context.Context, authID strin
 		}
 	}
 	m.mu.Unlock()
+	releaseMutation()
 
 	if snapshot == nil {
 		return
diff --git a/sdk/cliproxy/auth/force_refresh_test.go b/sdk/cliproxy/auth/force_refresh_test.go
index e970787a6..6b170717f 100644
--- a/sdk/cliproxy/auth/force_refresh_test.go
+++ b/sdk/cliproxy/auth/force_refresh_test.go
@@ -175,7 +175,8 @@ func (e *concurrencyTrackingRefreshExecutor) Refresh(_ context.Context, auth *Au
 	if auth.Metadata == nil {
 		auth.Metadata = make(map[string]any)
 	}
-	auth.Metadata["access_token"] = "refreshed-token"
+	auth.Metadata["access_token"] = "rotated-access-" + auth.ID
+	auth.Metadata["refresh_token"] = "rotated-refresh-" + auth.ID
 	return auth, nil
 }
 
@@ -269,10 +270,34 @@ func TestManager_ForceRefreshAll_CanceledContextSkipsExecutors(t *testing.T) {
 	}
 }
 
-func TestManager_ForceRefreshAll_DynamicCancellationSkipsRemaining(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
+// refreshCommitStore observes the commit context without writing credential files.
+type refreshCommitStore struct {
+	*memoryAuthTestStore
+	checkContext func(context.Context)
+}
 
-	manager := NewManager(nil, &RoundRobinSelector{}, nil)
+func (s *refreshCommitStore) Save(ctx context.Context, auth *Auth) (string, error) {
+	s.checkContext(ctx)
+	return s.memoryAuthTestStore.Save(ctx, auth)
+}
+
+func TestManager_ForceRefreshAll_DynamicCancellationSkipsRemaining(t *testing.T) {
+	type contextKey struct{}
+	ctx, cancel := context.WithCancel(context.WithValue(context.Background(), contextKey{}, "refresh-value"))
+	defer cancel()
+
+	store := &refreshCommitStore{
+		memoryAuthTestStore: newMemoryAuthTestStore(),
+		checkContext: func(ctx context.Context) {
+			if ctx.Err() != nil || ctx.Done() != nil {
+				t.Error("successful refresh commit must not inherit cancellation")
+			}
+			if ctx.Value(contextKey{}) != "refresh-value" {
+				t.Error("refresh commit lost context value")
+			}
+		},
+	}
+	manager := NewManager(store, &RoundRobinSelector{}, nil)
 	manager.runtimeConfig.Store(&internalconfig.Config{AuthAutoRefreshWorkers: 2})
 
 	executor := &concurrencyTrackingRefreshExecutor{
@@ -286,9 +311,9 @@ func TestManager_ForceRefreshAll_DynamicCancellationSkipsRemaining(t *testing.T)
 		auth := &Auth{
 			ID:       fmt.Sprintf("ag-%d", i),
 			Provider: "antigravity",
-			Metadata: map[string]any{"refresh_token": fmt.Sprintf("ref-%d", i)},
+			Metadata: map[string]any{"access_token": "old-access", "refresh_token": "old-refresh"},
 		}
-		if _, err := manager.Register(context.Background(), auth); err != nil {
+		if _, err := manager.Register(WithSkipPersist(context.Background()), auth); err != nil {
 			t.Fatalf("register auth: %v", err)
 		}
 	}
@@ -315,7 +340,8 @@ func TestManager_ForceRefreshAll_DynamicCancellationSkipsRemaining(t *testing.T)
 		t.Fatalf("expected 6 results, got %d", len(results))
 	}
 
-	// Exactly 2 workers entered Refresh; remaining 4 were canceled in queue
+	// Exactly 2 workers entered Refresh; remaining 4 were canceled in queue.
+	// Successful rotations must be saved and published despite cancellation.
 	if entered := executor.totalEntered.Load(); entered != 2 {
 		t.Fatalf("expected exactly 2 entered calls, got %d", entered)
 	}
@@ -323,10 +349,25 @@ func TestManager_ForceRefreshAll_DynamicCancellationSkipsRemaining(t *testing.T)
 	successCount := 0
 	cancelCount := 0
 	for _, res := range results {
+		current, exists := manager.GetByID(res.ID)
+		if !exists {
+			t.Fatalf("auth %s disappeared", res.ID)
+		}
+		store.mu.Lock()
+		persisted := store.auths[res.ID].Clone()
+		store.mu.Unlock()
 		if res.Success {
 			successCount++
+			for name, auth := range map[string]*Auth{"manager": current, "store": persisted} {
+				if auth == nil || auth.Metadata["access_token"] != "rotated-access-"+res.ID || auth.Metadata["refresh_token"] != "rotated-refresh-"+res.ID {
+					t.Errorf("%s missing rotated tokens for %s", name, res.ID)
+				}
+			}
 		} else if res.Error == context.Canceled.Error() {
 			cancelCount++
+			if persisted != nil || current.Metadata["access_token"] != "old-access" || current.Metadata["refresh_token"] != "old-refresh" {
+				t.Errorf("unstarted auth %s was modified or persisted", res.ID)
+			}
 		}
 	}
 	if successCount != 2 {
diff --git a/sdk/cliproxy/auth/store.go b/sdk/cliproxy/auth/store.go
index 0594a77dd..83e401dfa 100644
--- a/sdk/cliproxy/auth/store.go
+++ b/sdk/cliproxy/auth/store.go
@@ -7,6 +7,12 @@ type Store interface {
 	// List returns all auth records stored in the backend.
 	List(ctx context.Context) ([]*Auth, error)
 	// Save persists the provided auth record, replacing any existing one with same ID.
+	// It may enrich exported fields, but must not change ID, RegistrationEpoch or
+	// Generation. The manager merges these changes even on non-fatal save errors.
+	// Do not retain auth or mutate shared nested values in place: replace metadata
+	// values, pointers, Storage and Runtime instead. Auth.Clone shares these objects.
+	// Save may call manager read APIs, but must not synchronously mutate the
+	// manager or call Load (the reload barrier remains held until publication).
 	Save(ctx context.Context, auth *Auth) (string, error)
 	// Delete removes the auth record identified by id.
 	Delete(ctx context.Context, id string) error