diff --git a/internal/temporalcli/commands.activity.go b/internal/temporalcli/commands.activity.go
index 5f6b95421..cfb30ba41 100644
--- a/internal/temporalcli/commands.activity.go
+++ b/internal/temporalcli/commands.activity.go
@@ -54,6 +54,25 @@ func (c *TemporalActivityStartCommand) run(cctx *CommandContext, args []string)
 	return printActivityExecution(cctx, c.ActivityId, handle.GetRunID(), c.Parent.Namespace)
 }
 
+func (c *TemporalActivityDeleteCommand) run(cctx *CommandContext, args []string) error {
+	cl, err := dialClient(cctx, &c.Parent.ClientOptions)
+	if err != nil {
+		return err
+	}
+	defer cl.Close()
+
+	_, err = cl.WorkflowService().DeleteActivityExecution(cctx, &workflowservice.DeleteActivityExecutionRequest{
+		Namespace:  c.Parent.Namespace,
+		ActivityId: c.ActivityId,
+		RunId:      c.RunId,
+	})
+	if err != nil {
+		return fmt.Errorf("failed deleting activity: %w", err)
+	}
+
+	return printActivityDeletion(cctx, c.ActivityId, c.RunId, c.Parent.Namespace)
+}
+
 func (c *TemporalActivityExecuteCommand) run(cctx *CommandContext, args []string) error {
 	cl, err := dialClient(cctx, &c.Parent.ClientOptions)
 	if err != nil {
@@ -123,6 +142,21 @@ func printActivityExecution(cctx *CommandContext, activityID, runID, namespace s
 	}, printer.StructuredOptions{})
 }
 
+func printActivityDeletion(cctx *CommandContext, activityID, runID, namespace string) error {
+	if !cctx.JSONOutput {
+		cctx.Printer.Println(color.MagentaString("Deleted execution:"))
+	}
+	return cctx.Printer.PrintStructured(struct {
+		ActivityId string `json:"activityId"`
+		RunId      string `json:"runId"`
+		Namespace  string `json:"namespace"`
+	}{
+		ActivityId: activityID,
+		RunId:      runID,
+		Namespace:  namespace,
+	}, printer.StructuredOptions{})
+}
+
 func buildStartActivityOptions(opts *ActivityStartOptions) (client.StartActivityOptions, error) {
 	o := client.StartActivityOptions{
 		ID:                     opts.ActivityId,
diff --git a/internal/temporalcli/commands.gen.go b/internal/temporalcli/commands.gen.go
index b70bec6be..b5607a1c8 100644
--- a/internal/temporalcli/commands.gen.go
+++ b/internal/temporalcli/commands.gen.go
@@ -391,16 +391,16 @@ func (v *ActivityStartOptions) BuildFlags(f *pflag.FlagSet) {
 	_ = cobra.MarkFlagRequired(f, "activity-id")
 	f.StringVar(&v.Type, "type", "", "Activity Type name. Required.")
 	_ = cobra.MarkFlagRequired(f, "type")
-	f.StringVarP(&v.TaskQueue, "task-queue", "t", "", "Activity Task queue. Required.")
+	f.StringVarP(&v.TaskQueue, "task-queue", "t", "", "Activity task queue. Required.")
 	_ = cobra.MarkFlagRequired(f, "task-queue")
 	v.ScheduleToCloseTimeout = 0
 	f.Var(&v.ScheduleToCloseTimeout, "schedule-to-close-timeout", "Maximum time for the Activity Execution, including all retries. Either this or \"start-to-close-timeout\" is required.")
 	v.ScheduleToStartTimeout = 0
-	f.Var(&v.ScheduleToStartTimeout, "schedule-to-start-timeout", "Maximum time an Activity task can stay in a task queue before a Worker picks it up.")
+	f.Var(&v.ScheduleToStartTimeout, "schedule-to-start-timeout", "Maximum time an Activity task can stay in a task queue before a Worker picks it up. On expiry it results in a non-retryable failure and no further attempts are scheduled.")
 	v.StartToCloseTimeout = 0
-	f.Var(&v.StartToCloseTimeout, "start-to-close-timeout", "Maximum time for a single Activity attempt. Either this or \"schedule-to-close-timeout\" is required.")
+	f.Var(&v.StartToCloseTimeout, "start-to-close-timeout", "Maximum time for a single Activity attempt. On expiry a new attempt may be scheduled if permitted by the retry policy and schedule-to-close timeout. Either this or \"schedule-to-close-timeout\" is required.")
 	v.HeartbeatTimeout = 0
-	f.Var(&v.HeartbeatTimeout, "heartbeat-timeout", "Maximum time between successful Worker heartbeats.")
+	f.Var(&v.HeartbeatTimeout, "heartbeat-timeout", "Maximum time between successful Worker heartbeats. On expiry the current activity attempt fails.")
 	v.RetryInitialInterval = 0
 	f.Var(&v.RetryInitialInterval, "retry-initial-interval", "Interval of the first retry. If \"retry-backoff-coefficient\" is 1.0, it is used for all retries.")
 	v.RetryMaximumInterval = 0
@@ -466,6 +466,7 @@ func NewTemporalActivityCommand(cctx *CommandContext, parent *TemporalCommand) *
 	s.Command.AddCommand(&NewTemporalActivityCancelCommand(cctx, &s).Command)
 	s.Command.AddCommand(&NewTemporalActivityCompleteCommand(cctx, &s).Command)
 	s.Command.AddCommand(&NewTemporalActivityCountCommand(cctx, &s).Command)
+	s.Command.AddCommand(&NewTemporalActivityDeleteCommand(cctx, &s).Command)
 	s.Command.AddCommand(&NewTemporalActivityDescribeCommand(cctx, &s).Command)
 	s.Command.AddCommand(&NewTemporalActivityExecuteCommand(cctx, &s).Command)
 	s.Command.AddCommand(&NewTemporalActivityFailCommand(cctx, &s).Command)
@@ -572,6 +573,33 @@ func NewTemporalActivityCountCommand(cctx *CommandContext, parent *TemporalActiv
 	return &s
 }
 
+type TemporalActivityDeleteCommand struct {
+	Parent  *TemporalActivityCommand
+	Command cobra.Command
+	ActivityReferenceOptions
+}
+
+func NewTemporalActivityDeleteCommand(cctx *CommandContext, parent *TemporalActivityCommand) *TemporalActivityDeleteCommand {
+	var s TemporalActivityDeleteCommand
+	s.Parent = parent
+	s.Command.DisableFlagsInUseLine = true
+	s.Command.Use = "delete [flags]"
+	s.Command.Short = "Forcefully end a Standalone Activity (Experimental)"
+	if hasHighlighting {
+		s.Command.Long = "Delete a Standalone Activity.\n\n\x1b[1mtemporal activity delete \\\n    --activity-id YourActivityId \\\n    --run-id YourRunId\x1b[0m\n\nActivity code cannot see or respond to deletions."
+	} else {
+		s.Command.Long = "Delete a Standalone Activity.\n\n```\ntemporal activity delete \\\n    --activity-id YourActivityId \\\n    --run-id YourRunId\n```\n\nActivity code cannot see or respond to deletions."
+	}
+	s.Command.Args = cobra.NoArgs
+	s.ActivityReferenceOptions.BuildFlags(s.Command.Flags())
+	s.Command.Run = func(c *cobra.Command, args []string) {
+		if err := s.run(cctx, args); err != nil {
+			cctx.Options.Fail(err)
+		}
+	}
+	return &s
+}
+
 type TemporalActivityDescribeCommand struct {
 	Parent  *TemporalActivityCommand
 	Command cobra.Command
@@ -815,9 +843,9 @@ func NewTemporalActivityStartCommand(cctx *CommandContext, parent *TemporalActiv
 	s.Command.Use = "start [flags]"
 	s.Command.Short = "Start a new Standalone Activity (Experimental)"
 	if hasHighlighting {
-		s.Command.Long = "Start a new Standalone Activity. Outputs the Activity ID and\nRun ID.\n\n\x1b[1mtemporal activity start \\\n    --activity-id YourActivityId \\\n    --type YourActivity \\\n    --task-queue YourTaskQueue \\\n    --schedule-to-close-timeout 5m \\\n    --input '{\"some-key\": \"some-value\"}'\x1b[0m"
+		s.Command.Long = "Start a new Standalone Activity. Outputs the Activity ID and\nRun ID.\n\n\x1b[1mtemporal activity start \\\n    --activity-id YourActivityId \\\n    --type YourActivity \\\n    --task-queue YourTaskQueue \\\n    --start-to-close-timeout 5m \\\n    --input '{\"some-key\": \"some-value\"}'\x1b[0m"
 	} else {
-		s.Command.Long = "Start a new Standalone Activity. Outputs the Activity ID and\nRun ID.\n\n```\ntemporal activity start \\\n    --activity-id YourActivityId \\\n    --type YourActivity \\\n    --task-queue YourTaskQueue \\\n    --schedule-to-close-timeout 5m \\\n    --input '{\"some-key\": \"some-value\"}'\n```"
+		s.Command.Long = "Start a new Standalone Activity. Outputs the Activity ID and\nRun ID.\n\n```\ntemporal activity start \\\n    --activity-id YourActivityId \\\n    --type YourActivity \\\n    --task-queue YourTaskQueue \\\n    --start-to-close-timeout 5m \\\n    --input '{\"some-key\": \"some-value\"}'\n```"
 	}
 	s.Command.Args = cobra.NoArgs
 	s.ActivityStartOptions.BuildFlags(s.Command.Flags())
diff --git a/internal/temporalcli/commands.yaml b/internal/temporalcli/commands.yaml
index d8cf4ee95..f7526e8ef 100644
--- a/internal/temporalcli/commands.yaml
+++ b/internal/temporalcli/commands.yaml
@@ -716,6 +716,21 @@ commands:
           Reason for termination.
           Defaults to a message with the current user's name.
 
+  - name: temporal activity delete
+    summary: Forcefully end a Standalone Activity (Experimental)
+    description: |
+      Delete a Standalone Activity.
+
+      ```
+      temporal activity delete \
+          --activity-id YourActivityId \
+          --run-id YourRunId
+      ```
+
+      Activity code cannot see or respond to deletions.
+    option-sets:
+      - activity-reference
+
   - name: temporal batch
     summary: Manage running batch jobs
     description: |