diff --git a/internal/app/app.go b/internal/app/app.go
index 7b0bd78f..0f4f154a 100644
--- a/internal/app/app.go
+++ b/internal/app/app.go
@@ -657,6 +657,7 @@ func setupRoutes(
 		protected.POST("/eino-agent/stream", agentHandler.EinoSingleAgentLoopStream)
 		protected.GET("/hitl/pending", agentHandler.ListHITLPending)
 		protected.POST("/hitl/decision", agentHandler.DecideHITLInterrupt)
+		protected.POST("/hitl/dismiss", agentHandler.DismissHITLInterrupt)
 		protected.GET("/hitl/config/:conversationId", agentHandler.GetHITLConversationConfig)
 		protected.PUT("/hitl/config", agentHandler.UpsertHITLConversationConfig)
 		protected.POST("/hitl/tool-whitelist", agentHandler.MergeHITLGlobalToolWhitelist)
diff --git a/internal/handler/hitl.go b/internal/handler/hitl.go
index 4231f319..f14681e6 100644
--- a/internal/handler/hitl.go
+++ b/internal/handler/hitl.go
@@ -88,7 +88,20 @@ CREATE TABLE IF NOT EXISTS hitl_conversation_configs (
     timeout_seconds INTEGER NOT NULL DEFAULT 300,
     updated_at DATETIME NOT NULL
 );`)
-	return err
+	if err != nil {
+		return err
+	}
+
+	// On startup, cancel all orphaned pending interrupts from previous process.
+	// Their in-memory channels are gone, so they can never be resolved.
+	res, err := m.db.Exec(`UPDATE hitl_interrupts SET status='cancelled', decision='reject',
+		decision_comment='process restarted', decided_at=CURRENT_TIMESTAMP WHERE status='pending'`)
+	if err != nil {
+		m.logger.Warn("failed to cancel orphaned HITL interrupts", zap.Error(err))
+	} else if n, _ := res.RowsAffected(); n > 0 {
+		m.logger.Info("cancelled orphaned HITL interrupts from previous process", zap.Int64("count", n))
+	}
+	return nil
 }
 
 func normalizeHitlMode(mode string) string {
@@ -587,6 +600,43 @@ func (h *AgentHandler) DecideHITLInterrupt(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{"ok": true})
 }
 
+func (h *AgentHandler) DismissHITLInterrupt(c *gin.Context) {
+	var req struct {
+		InterruptID string `json:"interruptId" binding:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(400, gin.H{"error": err.Error()})
+		return
+	}
+	if h.hitlManager == nil {
+		c.JSON(500, gin.H{"error": "hitl manager unavailable"})
+		return
+	}
+	res, err := h.db.Exec(`UPDATE hitl_interrupts SET status='cancelled', decision='reject',
+		decision_comment='dismissed by user', decided_at=CURRENT_TIMESTAMP
+		WHERE id=? AND status='pending'`, req.InterruptID)
+	if err != nil {
+		c.JSON(500, gin.H{"error": err.Error()})
+		return
+	}
+	n, _ := res.RowsAffected()
+	if n == 0 {
+		c.JSON(404, gin.H{"error": "interrupt not found or already resolved"})
+		return
+	}
+	// Also drain from in-memory map if present
+	h.hitlManager.mu.Lock()
+	if p, ok := h.hitlManager.pending[req.InterruptID]; ok {
+		delete(h.hitlManager.pending, req.InterruptID)
+		select {
+		case p.decideCh <- hitlDecision{Decision: "reject", Comment: "dismissed by user"}:
+		default:
+		}
+	}
+	h.hitlManager.mu.Unlock()
+	c.JSON(http.StatusOK, gin.H{"ok": true})
+}
+
 func (h *AgentHandler) interceptHITLForEinoTool(runCtx context.Context, cancelRun context.CancelCauseFunc, conversationID, assistantMessageID string, sendEventFunc func(eventType, message string, data interface{}), toolName, arguments string) (string, error) {
 	payload := map[string]interface{}{
 		"toolName":   toolName,