diff --git a/shortcuts/issue/issue.go b/shortcuts/issue/issue.go
index 902fda8..a12d0ad 100644
--- a/shortcuts/issue/issue.go
+++ b/shortcuts/issue/issue.go
@@ -223,6 +223,199 @@ func Shortcuts() []*common.Shortcut {
 				return ctx.Output(env)
 			},
 		},
+		{
+			Name:        "comments",
+			Description: "List comments and activity on an issue",
+			Flags: []common.Flag{
+				{Name: "number", Short: "n", Usage: "Issue number (as shown in the web URL)", Required: true},
+				{Name: "page", Short: "p", Usage: "Page number", Default: "1"},
+				{Name: "limit", Short: "l", Usage: "Items per page", Default: "20"},
+			},
+			Run: func(ctx *common.RuntimeContext) error {
+				if err := ctx.ResolveOwnerRepo(); err != nil {
+					return err
+				}
+				number, err := ctx.RequireArg("number")
+				if err != nil {
+					return err
+				}
+				q := url.Values{}
+				q.Set("page", ctx.Arg("page"))
+				q.Set("limit", ctx.Arg("limit"))
+				env, err := ctx.CallAPIWithQuery("GET", fmt.Sprintf("%s/issues/%s/journals", v1RepoPath(ctx), number), q)
+				if err != nil {
+					return err
+				}
+				return ctx.Output(env)
+			},
+		},
+		{
+			Name:        "update-comment",
+			Description: "Update a comment on an issue",
+			Flags: []common.Flag{
+				{Name: "number", Short: "n", Usage: "Issue number (as shown in the web URL)", Required: true},
+				{Name: "id", Usage: "Comment journal ID", Required: true},
+				{Name: "body", Short: "b", Usage: "New comment body", Required: true},
+			},
+			Run: func(ctx *common.RuntimeContext) error {
+				if err := ctx.ResolveOwnerRepo(); err != nil {
+					return err
+				}
+				number, err := ctx.RequireArg("number")
+				if err != nil {
+					return err
+				}
+				id, err := ctx.RequireArg("id")
+				if err != nil {
+					return err
+				}
+				body, err := ctx.RequireArg("body")
+				if err != nil {
+					return err
+				}
+				payload := map[string]interface{}{
+					"notes": body,
+				}
+				env, err := ctx.CallAPI("PATCH", fmt.Sprintf("%s/issues/%s/journals/%s", v1RepoPath(ctx), number, id), payload)
+				if err != nil {
+					return err
+				}
+				return ctx.Output(env)
+			},
+		},
+		{
+			Name:        "delete-comment",
+			Description: "Delete a comment on an issue",
+			Flags: []common.Flag{
+				{Name: "number", Short: "n", Usage: "Issue number (as shown in the web URL)", Required: true},
+				{Name: "id", Usage: "Comment journal ID", Required: true},
+			},
+			Run: func(ctx *common.RuntimeContext) error {
+				if err := ctx.ResolveOwnerRepo(); err != nil {
+					return err
+				}
+				number, err := ctx.RequireArg("number")
+				if err != nil {
+					return err
+				}
+				id, err := ctx.RequireArg("id")
+				if err != nil {
+					return err
+				}
+				env, err := ctx.CallAPI("DELETE", fmt.Sprintf("%s/issues/%s/journals/%s", v1RepoPath(ctx), number, id), nil)
+				if err != nil {
+					return err
+				}
+				return ctx.Output(env)
+			},
+		},
+		{
+			Name:        "reply-comment",
+			Description: "List child replies of a comment",
+			Flags: []common.Flag{
+				{Name: "number", Short: "n", Usage: "Issue number (as shown in the web URL)", Required: true},
+				{Name: "id", Usage: "Parent comment journal ID", Required: true},
+			},
+			Run: func(ctx *common.RuntimeContext) error {
+				if err := ctx.ResolveOwnerRepo(); err != nil {
+					return err
+				}
+				number, err := ctx.RequireArg("number")
+				if err != nil {
+					return err
+				}
+				id, err := ctx.RequireArg("id")
+				if err != nil {
+					return err
+				}
+				env, err := ctx.CallAPI("GET", fmt.Sprintf("%s/issues/%s/journals/%s/children_journals", v1RepoPath(ctx), number, id), nil)
+				if err != nil {
+					return err
+				}
+				return ctx.Output(env)
+			},
+		},
+		{
+			Name:        "delete",
+			Description: "Delete an issue",
+			Flags: []common.Flag{
+				{Name: "number", Short: "n", Usage: "Issue number (as shown in the web URL)", Required: true},
+			},
+			Run: func(ctx *common.RuntimeContext) error {
+				if err := ctx.ResolveOwnerRepo(); err != nil {
+					return err
+				}
+				number, err := ctx.RequireArg("number")
+				if err != nil {
+					return err
+				}
+				env, err := ctx.CallAPI("DELETE", fmt.Sprintf("%s/issues/%s", v1RepoPath(ctx), number), nil)
+				if err != nil {
+					return err
+				}
+				return ctx.Output(env)
+			},
+		},
+		{
+			Name:        "batch-update",
+			Description: "Batch update multiple issues",
+			Flags: []common.Flag{
+				{Name: "ids", Usage: "Comma-separated issue IDs", Required: true},
+				{Name: "state", Short: "s", Usage: "New state: open, closed"},
+				{Name: "assignee", Short: "a", Usage: "Assignee login"},
+			},
+			Run: func(ctx *common.RuntimeContext) error {
+				if err := ctx.ResolveOwnerRepo(); err != nil {
+					return err
+				}
+				idsStr, err := ctx.RequireArg("ids")
+				if err != nil {
+					return err
+				}
+				body := map[string]interface{}{
+					"ids": parseIDList(idsStr),
+				}
+				if s := ctx.Arg("state"); s != "" {
+					statusID, err := normalizeIssueStatus(s)
+					if err != nil {
+						return err
+					}
+					body["status_id"] = statusID
+				}
+				if a := ctx.Arg("assignee"); a != "" {
+					body["assigned_to_id"] = a
+				}
+				env, err := ctx.CallAPI("PATCH", v1RepoPath(ctx)+"/issues/batch_update", body)
+				if err != nil {
+					return err
+				}
+				return ctx.Output(env)
+			},
+		},
+		{
+			Name:        "batch-destroy",
+			Description: "Batch delete multiple issues",
+			Flags: []common.Flag{
+				{Name: "ids", Usage: "Comma-separated issue IDs", Required: true},
+			},
+			Run: func(ctx *common.RuntimeContext) error {
+				if err := ctx.ResolveOwnerRepo(); err != nil {
+					return err
+				}
+				idsStr, err := ctx.RequireArg("ids")
+				if err != nil {
+					return err
+				}
+				body := map[string]interface{}{
+					"ids": parseIDList(idsStr),
+				}
+				env, err := ctx.CallAPI("DELETE", v1RepoPath(ctx)+"/issues/batch_destroy", body)
+				if err != nil {
+					return err
+				}
+				return ctx.Output(env)
+			},
+		},
 	}
 }
 
@@ -289,3 +482,19 @@ func normalizeIssueStatus(state string) (interface{}, error) {
 		return nil, fmt.Errorf("invalid --state %q: use open, closed, or a numeric status_id", state)
 	}
 }
+
+// parseIDList splits a comma-separated string into an int slice.
+func parseIDList(s string) []int {
+	parts := strings.Split(s, ",")
+	ids := make([]int, 0, len(parts))
+	for _, p := range parts {
+		p = strings.TrimSpace(p)
+		if p == "" {
+			continue
+		}
+		if id, err := strconv.Atoi(p); err == nil {
+			ids = append(ids, id)
+		}
+	}
+	return ids
+}
diff --git a/shortcuts/issue/issue_test.go b/shortcuts/issue/issue_test.go
index 088f82c..9a812d5 100644
--- a/shortcuts/issue/issue_test.go
+++ b/shortcuts/issue/issue_test.go
@@ -186,3 +186,182 @@ func assertEqual(t *testing.T, got interface{}, want interface{}) {
 		t.Fatalf("got %v (%T), want %v (%T)", got, got, want, want)
 	}
 }
+
+func TestIssueDelete(t *testing.T) {
+	server := newIssueTestServer(t, func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == "DELETE" && r.URL.Path == "/v1/owner/repo/issues/42.json":
+			writeJSON(t, w, map[string]interface{}{"ok": true})
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+	})
+	defer server.Close()
+
+	err := runIssueShortcut(t, server, "delete", map[string]string{"number": "42"})
+	if err != nil {
+		t.Fatalf("delete shortcut failed: %v", err)
+	}
+}
+
+func TestIssueComments(t *testing.T) {
+	server := newIssueTestServer(t, func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == "GET" && r.URL.Path == "/v1/owner/repo/issues/42/journals.json":
+			if r.URL.Query().Get("page") != "2" || r.URL.Query().Get("limit") != "10" {
+				t.Fatalf("unexpected query params: %v", r.URL.Query())
+			}
+			writeJSON(t, w, map[string]interface{}{
+				"journals": []interface{}{
+					map[string]interface{}{"id": 1, "notes": "first comment"},
+					map[string]interface{}{"id": 2, "notes": "second comment"},
+				},
+			})
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+	})
+	defer server.Close()
+
+	err := runIssueShortcut(t, server, "comments", map[string]string{
+		"number": "42",
+		"page":   "2",
+		"limit":  "10",
+	})
+	if err != nil {
+		t.Fatalf("comments shortcut failed: %v", err)
+	}
+}
+
+func TestIssueUpdateComment(t *testing.T) {
+	var updatePayload map[string]interface{}
+	server := newIssueTestServer(t, func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == "PATCH" && r.URL.Path == "/v1/owner/repo/issues/42/journals/99.json":
+			updatePayload = decodeJSON(t, r)
+			writeJSON(t, w, updatePayload)
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+	})
+	defer server.Close()
+
+	err := runIssueShortcut(t, server, "update-comment", map[string]string{
+		"number": "42",
+		"id":     "99",
+		"body":   "updated comment text",
+	})
+	if err != nil {
+		t.Fatalf("update-comment shortcut failed: %v", err)
+	}
+
+	assertEqual(t, updatePayload["notes"], "updated comment text")
+}
+
+func TestIssueDeleteComment(t *testing.T) {
+	server := newIssueTestServer(t, func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == "DELETE" && r.URL.Path == "/v1/owner/repo/issues/42/journals/99.json":
+			writeJSON(t, w, map[string]interface{}{"ok": true})
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+	})
+	defer server.Close()
+
+	err := runIssueShortcut(t, server, "delete-comment", map[string]string{
+		"number": "42",
+		"id":     "99",
+	})
+	if err != nil {
+		t.Fatalf("delete-comment shortcut failed: %v", err)
+	}
+}
+
+func TestIssueReplyComment(t *testing.T) {
+	server := newIssueTestServer(t, func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == "GET" && r.URL.Path == "/v1/owner/repo/issues/42/journals/99/children_journals.json":
+			writeJSON(t, w, map[string]interface{}{
+				"journals": []interface{}{
+					map[string]interface{}{"id": 100, "notes": "reply"},
+				},
+			})
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+	})
+	defer server.Close()
+
+	err := runIssueShortcut(t, server, "reply-comment", map[string]string{
+		"number": "42",
+		"id":     "99",
+	})
+	if err != nil {
+		t.Fatalf("reply-comment shortcut failed: %v", err)
+	}
+}
+
+func TestIssueBatchUpdate(t *testing.T) {
+	var updatePayload map[string]interface{}
+	server := newIssueTestServer(t, func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == "PATCH" && r.URL.Path == "/v1/owner/repo/issues/batch_update.json":
+			updatePayload = decodeJSON(t, r)
+			writeJSON(t, w, updatePayload)
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+	})
+	defer server.Close()
+
+	err := runIssueShortcut(t, server, "batch-update", map[string]string{
+		"ids":      "1,2,3",
+		"state":    "closed",
+		"assignee": "someone",
+	})
+	if err != nil {
+		t.Fatalf("batch-update shortcut failed: %v", err)
+	}
+
+	ids, ok := updatePayload["ids"].([]interface{})
+	if !ok {
+		t.Fatalf("expected ids to be a slice, got %T", updatePayload["ids"])
+	}
+	assertEqual(t, len(ids), 3)
+	assertEqual(t, ids[0], float64(1))
+	assertEqual(t, ids[1], float64(2))
+	assertEqual(t, ids[2], float64(3))
+	assertEqual(t, updatePayload["status_id"], float64(5))
+	assertEqual(t, updatePayload["assigned_to_id"], "someone")
+}
+
+func TestIssueBatchDestroy(t *testing.T) {
+	var updatePayload map[string]interface{}
+	server := newIssueTestServer(t, func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == "DELETE" && r.URL.Path == "/v1/owner/repo/issues/batch_destroy.json":
+			updatePayload = decodeJSON(t, r)
+			writeJSON(t, w, updatePayload)
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+	})
+	defer server.Close()
+
+	err := runIssueShortcut(t, server, "batch-destroy", map[string]string{
+		"ids": "10,20,30",
+	})
+	if err != nil {
+		t.Fatalf("batch-destroy shortcut failed: %v", err)
+	}
+
+	ids, ok := updatePayload["ids"].([]interface{})
+	if !ok {
+		t.Fatalf("expected ids to be a slice, got %T", updatePayload["ids"])
+	}
+	assertEqual(t, len(ids), 3)
+	assertEqual(t, ids[0], float64(10))
+	assertEqual(t, ids[1], float64(20))
+	assertEqual(t, ids[2], float64(30))
+}