diff --git a/gen/go/v1/config.pb.go b/gen/go/v1/config.pb.go
index 2b869880..075f7161 100644
--- a/gen/go/v1/config.pb.go
+++ b/gen/go/v1/config.pb.go
@@ -184,6 +184,7 @@ const (
 	Hook_CONDITION_SNAPSHOT_ERROR   Hook_Condition = 4 // snapshot failed.
 	Hook_CONDITION_SNAPSHOT_WARNING Hook_Condition = 5 // snapshot completed with warnings.
 	Hook_CONDITION_SNAPSHOT_SUCCESS Hook_Condition = 6 // snapshot succeeded.
+	Hook_CONDITION_SNAPSHOT_SKIPPED Hook_Condition = 7 // snapshot was skipped e.g. due to no changes.
 	// prune conditions
 	Hook_CONDITION_PRUNE_START   Hook_Condition = 100 // prune started.
 	Hook_CONDITION_PRUNE_ERROR   Hook_Condition = 101 // prune failed.
@@ -204,6 +205,7 @@ var (
 		4:   "CONDITION_SNAPSHOT_ERROR",
 		5:   "CONDITION_SNAPSHOT_WARNING",
 		6:   "CONDITION_SNAPSHOT_SUCCESS",
+		7:   "CONDITION_SNAPSHOT_SKIPPED",
 		100: "CONDITION_PRUNE_START",
 		101: "CONDITION_PRUNE_ERROR",
 		102: "CONDITION_PRUNE_SUCCESS",
@@ -219,6 +221,7 @@ var (
 		"CONDITION_SNAPSHOT_ERROR":   4,
 		"CONDITION_SNAPSHOT_WARNING": 5,
 		"CONDITION_SNAPSHOT_SUCCESS": 6,
+		"CONDITION_SNAPSHOT_SKIPPED": 7,
 		"CONDITION_PRUNE_START":      100,
 		"CONDITION_PRUNE_ERROR":      101,
 		"CONDITION_PRUNE_SUCCESS":    102,
@@ -624,15 +627,16 @@ type Plan struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Id          string           `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`                      // unique but human readable ID for this plan.
-	Repo        string           `protobuf:"bytes,2,opt,name=repo,proto3" json:"repo,omitempty"`                  // ID of the repo to use.
-	Paths       []string         `protobuf:"bytes,4,rep,name=paths,proto3" json:"paths,omitempty"`                // paths to include in the backup.
-	Excludes    []string         `protobuf:"bytes,5,rep,name=excludes,proto3" json:"excludes,omitempty"`          // glob patterns to exclude.
-	Iexcludes   []string         `protobuf:"bytes,9,rep,name=iexcludes,proto3" json:"iexcludes,omitempty"`        // case insensitive glob patterns to exclude.
-	Schedule    *Schedule        `protobuf:"bytes,12,opt,name=schedule,proto3" json:"schedule,omitempty"`         // schedule for the backup.
-	Retention   *RetentionPolicy `protobuf:"bytes,7,opt,name=retention,proto3" json:"retention,omitempty"`        // retention policy for snapshots.
-	Hooks       []*Hook          `protobuf:"bytes,8,rep,name=hooks,proto3" json:"hooks,omitempty"`                // hooks to run on events for this plan.
-	BackupFlags []string         `protobuf:"bytes,10,rep,name=backup_flags,proto3" json:"backup_flags,omitempty"` // extra flags to set when running a backup command.
+	Id              string           `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`                                                      // unique but human readable ID for this plan.
+	Repo            string           `protobuf:"bytes,2,opt,name=repo,proto3" json:"repo,omitempty"`                                                  // ID of the repo to use.
+	Paths           []string         `protobuf:"bytes,4,rep,name=paths,proto3" json:"paths,omitempty"`                                                // paths to include in the backup.
+	Excludes        []string         `protobuf:"bytes,5,rep,name=excludes,proto3" json:"excludes,omitempty"`                                          // glob patterns to exclude.
+	Iexcludes       []string         `protobuf:"bytes,9,rep,name=iexcludes,proto3" json:"iexcludes,omitempty"`                                        // case insensitive glob patterns to exclude.
+	Schedule        *Schedule        `protobuf:"bytes,12,opt,name=schedule,proto3" json:"schedule,omitempty"`                                         // schedule for the backup.
+	Retention       *RetentionPolicy `protobuf:"bytes,7,opt,name=retention,proto3" json:"retention,omitempty"`                                        // retention policy for snapshots.
+	Hooks           []*Hook          `protobuf:"bytes,8,rep,name=hooks,proto3" json:"hooks,omitempty"`                                                // hooks to run on events for this plan.
+	BackupFlags     []string         `protobuf:"bytes,10,rep,name=backup_flags,proto3" json:"backup_flags,omitempty"`                                 // extra flags to set when running a backup command.
+	SkipIfUnchanged bool             `protobuf:"varint,13,opt,name=skip_if_unchanged,json=skipIfUnchanged,proto3" json:"skip_if_unchanged,omitempty"` // skip the backup if no changes are detected.
 }
 
 func (x *Plan) Reset() {
@@ -730,6 +734,13 @@ func (x *Plan) GetBackupFlags() []string {
 	return nil
 }
 
+func (x *Plan) GetSkipIfUnchanged() bool {
+	if x != nil {
+		return x.SkipIfUnchanged
+	}
+	return false
+}
+
 type CommandPrefix struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -2027,7 +2038,7 @@ var file_v1_config_proto_rawDesc = []byte{
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@@ -2045,205 +2056,211 @@ var file_v1_config_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/internal/orchestrator/repo/repo.go b/internal/orchestrator/repo/repo.go
index 53fce9b5..14d7bc06 100644
--- a/internal/orchestrator/repo/repo.go
+++ b/internal/orchestrator/repo/repo.go
@@ -169,13 +169,13 @@ func (r *RepoOrchestrator) Backup(ctx context.Context, plan *v1.Plan, progressCa
 
 	ctx, flush := forwardResticLogs(ctx)
 	defer flush()
-	l.Debug("starting backup", zap.String("repo", r.repoConfig.Id), zap.String("plan", plan.Id))
+	l.Debug("starting backup", zap.String("plan", plan.Id))
 	summary, err := r.repo.Backup(ctx, plan.Paths, progressCallback, opts...)
 	if err != nil {
 		return summary, fmt.Errorf("failed to backup: %w", err)
 	}
 
-	l.Debug("backup completed", zap.String("repo", r.repoConfig.Id), zap.Duration("duration", time.Since(startTime)))
+	l.Debug("backup completed", zap.Duration("duration", time.Since(startTime)))
 	return summary, nil
 }
 
diff --git a/internal/orchestrator/tasks/hookvars.go b/internal/orchestrator/tasks/hookvars.go
index 0e5c7a52..f56d8a38 100644
--- a/internal/orchestrator/tasks/hookvars.go
+++ b/internal/orchestrator/tasks/hookvars.go
@@ -41,6 +41,8 @@ func (v HookVars) EventName(cond v1.Hook_Condition) string {
 		return "snapshot warning"
 	case v1.Hook_CONDITION_SNAPSHOT_SUCCESS:
 		return "snapshot success"
+	case v1.Hook_CONDITION_SNAPSHOT_SKIPPED:
+		return "snapshot skipped"
 	case v1.Hook_CONDITION_CHECK_START:
 		return "check start"
 	case v1.Hook_CONDITION_CHECK_ERROR:
diff --git a/internal/orchestrator/tasks/hookvars_test.go b/internal/orchestrator/tasks/hookvars_test.go
new file mode 100644
index 00000000..a800d132
--- /dev/null
+++ b/internal/orchestrator/tasks/hookvars_test.go
@@ -0,0 +1,23 @@
+package tasks
+
+import (
+	"testing"
+
+	v1 "github.com/garethgeorge/backrest/gen/go/v1"
+)
+
+func TestHookVarsEventName(t *testing.T) {
+	// for every value of condition, check that the event name is correct
+	values := v1.Hook_Condition(0).Descriptor().Values()
+	for i := 0; i < values.Len(); i++ {
+		condition := v1.Hook_Condition(values.Get(i).Number())
+		if condition == v1.Hook_CONDITION_UNKNOWN {
+			continue
+		}
+
+		vars := HookVars{}
+		if vars.EventName(condition) == "unknown" {
+			t.Errorf("unexpected event name for condition %v", condition)
+		}
+	}
+}
diff --git a/internal/orchestrator/tasks/taskbackup.go b/internal/orchestrator/tasks/taskbackup.go
index bc7dc51d..ec1e4ec3 100644
--- a/internal/orchestrator/tasks/taskbackup.go
+++ b/internal/orchestrator/tasks/taskbackup.go
@@ -212,11 +212,6 @@ func (t *BackupTask) Run(ctx context.Context, st ScheduledTask, runner TaskRunne
 			v1.Hook_CONDITION_SNAPSHOT_WARNING,
 			v1.Hook_CONDITION_SNAPSHOT_END,
 		}, vars)
-	} else {
-		runner.ExecuteHooks(ctx, []v1.Hook_Condition{
-			v1.Hook_CONDITION_SNAPSHOT_SUCCESS,
-			v1.Hook_CONDITION_SNAPSHOT_END,
-		}, vars)
 	}
 
 	op.SnapshotId = summary.SnapshotId
@@ -227,15 +222,28 @@ func (t *BackupTask) Run(ctx context.Context, st ScheduledTask, runner TaskRunne
 
 	l.Info("backup complete", zap.String("plan", plan.Id), zap.Duration("duration", time.Since(startTime)), zap.Any("summary", backupOp.OperationBackup.LastStatus))
 
-	// schedule followup tasks
-	at := time.Now()
-	if _, ok := plan.Retention.GetPolicy().(*v1.RetentionPolicy_PolicyKeepAll); plan.Retention != nil && !ok {
-		if err := runner.ScheduleTask(NewOneoffForgetTask(t.RepoID(), t.PlanID(), op.FlowId, at), TaskPriorityForget); err != nil {
-			return fmt.Errorf("failed to schedule forget task: %w", err)
+	if summary.SnapshotId == "" { // support --skip-if-unchanged which returns an operation with an empty snapshot ID
+		op.DisplayMessage = "No snapshot added, possibly due to no changes in the source data."
+		runner.ExecuteHooks(ctx, []v1.Hook_Condition{
+			v1.Hook_CONDITION_SNAPSHOT_SKIPPED,
+			v1.Hook_CONDITION_SNAPSHOT_END,
+		}, vars)
+	} else {
+		runner.ExecuteHooks(ctx, []v1.Hook_Condition{
+			v1.Hook_CONDITION_SNAPSHOT_SUCCESS,
+			v1.Hook_CONDITION_SNAPSHOT_END,
+		}, vars)
+
+		// schedule followup tasks if a snapshot was added
+		at := time.Now()
+		if _, ok := plan.Retention.GetPolicy().(*v1.RetentionPolicy_PolicyKeepAll); plan.Retention != nil && !ok {
+			if err := runner.ScheduleTask(NewOneoffForgetTask(t.RepoID(), t.PlanID(), op.FlowId, at), TaskPriorityForget); err != nil {
+				return fmt.Errorf("failed to schedule forget task: %w", err)
+			}
+		}
+		if err := runner.ScheduleTask(NewOneoffIndexSnapshotsTask(t.RepoID(), at), TaskPriorityIndexSnapshots); err != nil {
+			return fmt.Errorf("failed to schedule index snapshots task: %w", err)
 		}
-	}
-	if err := runner.ScheduleTask(NewOneoffIndexSnapshotsTask(t.RepoID(), at), TaskPriorityIndexSnapshots); err != nil {
-		return fmt.Errorf("failed to schedule index snapshots task: %w", err)
 	}
 
 	return nil
diff --git a/pkg/restic/outputs.go b/pkg/restic/outputs.go
index aa1254b6..014d533b 100644
--- a/pkg/restic/outputs.go
+++ b/pkg/restic/outputs.go
@@ -116,10 +116,7 @@ type BackupProgressEntry struct {
 }
 
 func (b *BackupProgressEntry) Validate() error {
-	if b.MessageType == "summary" {
-		if b.SnapshotId == "" {
-			return errors.New("summary message must have snapshot_id")
-		}
+	if b.MessageType == "summary" && b.SnapshotId != "" {
 		if err := ValidateSnapshotId(b.SnapshotId); err != nil {
 			return err
 		}
diff --git a/proto/v1/config.proto b/proto/v1/config.proto
index 2e3e58d7..60f9d5a7 100644
--- a/proto/v1/config.proto
+++ b/proto/v1/config.proto
@@ -54,6 +54,8 @@ message Plan {
   RetentionPolicy retention = 7 [json_name="retention"]; // retention policy for snapshots.
   repeated Hook hooks = 8 [json_name="hooks"]; // hooks to run on events for this plan.
   repeated string backup_flags = 10 [json_name="backup_flags"]; // extra flags to set when running a backup command.
+  bool skip_if_unchanged = 13 [json_name="skipIfUnchanged"]; // skip the backup if no changes are detected.
+  reserved 3, 6, 11; // deprecated
 }
 
 message CommandPrefix {
@@ -132,6 +134,7 @@ message Hook {
     CONDITION_SNAPSHOT_ERROR = 4; // snapshot failed.
     CONDITION_SNAPSHOT_WARNING = 5; // snapshot completed with warnings.
     CONDITION_SNAPSHOT_SUCCESS = 6; // snapshot succeeded.
+    CONDITION_SNAPSHOT_SKIPPED = 7; // snapshot was skipped e.g. due to no changes.
     
     // prune conditions
     CONDITION_PRUNE_START = 100; // prune started.
diff --git a/webui/gen/ts/v1/config_pb.ts b/webui/gen/ts/v1/config_pb.ts
index 99c18e60..3b2101fd 100644
--- a/webui/gen/ts/v1/config_pb.ts
+++ b/webui/gen/ts/v1/config_pb.ts
@@ -342,6 +342,13 @@ export class Plan extends Message<Plan> {
    */
   backupFlags: string[] = [];
 
+  /**
+   * skip the backup if no changes are detected.
+   *
+   * @generated from field: bool skip_if_unchanged = 13;
+   */
+  skipIfUnchanged = false;
+
   constructor(data?: PartialMessage<Plan>) {
     super();
     proto3.util.initPartial(data, this);
@@ -359,6 +366,7 @@ export class Plan extends Message<Plan> {
     { no: 7, name: "retention", kind: "message", T: RetentionPolicy },
     { no: 8, name: "hooks", kind: "message", T: Hook, repeated: true },
     { no: 10, name: "backup_flags", jsonName: "backup_flags", kind: "scalar", T: 9 /* ScalarType.STRING */, repeated: true },
+    { no: 13, name: "skip_if_unchanged", kind: "scalar", T: 8 /* ScalarType.BOOL */ },
   ]);
 
   static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): Plan {
@@ -986,6 +994,13 @@ export enum Hook_Condition {
    */
   SNAPSHOT_SUCCESS = 6,
 
+  /**
+   * snapshot was skipped e.g. due to no changes.
+   *
+   * @generated from enum value: CONDITION_SNAPSHOT_SKIPPED = 7;
+   */
+  SNAPSHOT_SKIPPED = 7,
+
   /**
    * prune conditions
    *
@@ -1041,6 +1056,7 @@ proto3.util.setEnumType(Hook_Condition, "v1.Hook.Condition", [
   { no: 4, name: "CONDITION_SNAPSHOT_ERROR" },
   { no: 5, name: "CONDITION_SNAPSHOT_WARNING" },
   { no: 6, name: "CONDITION_SNAPSHOT_SUCCESS" },
+  { no: 7, name: "CONDITION_SNAPSHOT_SKIPPED" },
   { no: 100, name: "CONDITION_PRUNE_START" },
   { no: 101, name: "CONDITION_PRUNE_ERROR" },
   { no: 102, name: "CONDITION_PRUNE_SUCCESS" },
diff --git a/webui/src/components/OperationRow.tsx b/webui/src/components/OperationRow.tsx
index eb80bc32..fdc04d2d 100644
--- a/webui/src/components/OperationRow.tsx
+++ b/webui/src/components/OperationRow.tsx
@@ -495,7 +495,9 @@ const BackupOperationStatus = ({
       <>
         <Typography.Text>
           <Typography.Text strong>Snapshot ID: </Typography.Text>
-          {normalizeSnapshotId(sum.snapshotId!)}
+          {sum.snapshotId !== ""
+            ? normalizeSnapshotId(sum.snapshotId!)
+            : "No Snapshot Created"}
         </Typography.Text>
         <Row gutter={16}>
           <Col span={8}>
diff --git a/webui/src/components/OperationTree.tsx b/webui/src/components/OperationTree.tsx
index 17156847..d428576b 100644
--- a/webui/src/components/OperationTree.tsx
+++ b/webui/src/components/OperationTree.tsx
@@ -85,9 +85,12 @@ export const OperationTree = ({
         event === OperationEventType.EVENT_UPDATED
       ) {
         for (const flowID of flowIDs) {
-          const displayInfo = displayInfoForFlow(
-            logState.getByFlowID(flowID) || []
-          );
+          const ops = logState.getByFlowID(flowID);
+          if (!ops || ops[0].op.case === "operationRunHook") {
+            continue;
+          }
+
+          const displayInfo = displayInfoForFlow(ops);
           if (!displayInfo.hidden) {
             backupInfoByFlowID.set(flowID, displayInfo);
           } else {
diff --git a/webui/src/state/oplog.ts b/webui/src/state/oplog.ts
index 18a256e8..c2d645d3 100644
--- a/webui/src/state/oplog.ts
+++ b/webui/src/state/oplog.ts
@@ -60,6 +60,7 @@ export const unsubscribeFromOperations = (
 export const shouldHideOperation = (operation: Operation) => {
   return (
     operation.op.case === "operationStats" ||
+    (operation.status === OperationStatus.STATUS_SUCCESS && operation.op.case === "operationBackup" && !operation.snapshotId) ||
     shouldHideStatus(operation.status)
   );
 };
diff --git a/webui/src/views/PlanView.tsx b/webui/src/views/PlanView.tsx
index 4fa62a1f..161918a8 100644
--- a/webui/src/views/PlanView.tsx
+++ b/webui/src/views/PlanView.tsx
@@ -117,7 +117,7 @@ export const PlanView = ({ plan }: React.PropsWithChildren<{ plan: Plan }>) => {
           },
           {
             key: "2",
-            label: "Operation List",
+            label: "Full Operation History",
             children: (
               <>
                 <h2>Backup Action History</h2>
diff --git a/webui/src/views/RepoView.tsx b/webui/src/views/RepoView.tsx
index 17e3ac9f..b10f1416 100644
--- a/webui/src/views/RepoView.tsx
+++ b/webui/src/views/RepoView.tsx
@@ -125,7 +125,7 @@ export const RepoView = ({ repo }: React.PropsWithChildren<{ repo: Repo }>) => {
     },
     {
       key: "2",
-      label: "Operation List",
+      label: "Full Operation History",
       children: (
         <>
           <h3>Backup Action History</h3>