fix: decouple --json shorthand registration from default format injection

shortcuts/common/runner.go

@@ -1171,6 +1171,57 @@ func registerShortcutFlags(cmd *cobra.Command, f *cmdutil.Factory, s *Shortcut)
 	registerShortcutFlagsWithContext(context.Background(), cmd, f, s)
 }
 
+// shortcutDeclaresJSONFlag reports whether the shortcut itself declares a flag
+// named "json" in its Flags list (custom semantics, e.g. event +subscribe's
+// pretty-print switch or base +record-search's request-body payload).
+// Framework-injected flags never appear in s.Flags, so this cleanly separates
+// "self-declared json" from "injected shorthand".
+func shortcutDeclaresJSONFlag(s *Shortcut) bool {
+	for _, fl := range s.Flags {
+		if fl.Name == "json" {
+			return true
+		}
+	}
+	return false
+}
+
+// shortcutFormatSupportsJSON reports whether the command's format flag accepts
+// "json": a self-declared format supports it only when its Enum lists "json";
+// a framework-injected default format (no format entry in s.Flags) always does.
+func shortcutFormatSupportsJSON(s *Shortcut) bool {
+	for _, fl := range s.Flags {
+		if fl.Name == "format" {
+			return slices.Contains(fl.Enum, "json")
+		}
+	}
+	return true // framework-injected: json (default) | pretty | table | ndjson | csv
+}
+
+// ensureJSONShorthand registers --json as a shorthand for --format json when:
+//  1. the command has a format flag (self-declared or framework-injected), AND
+//  2. that format supports "json" (see shortcutFormatSupportsJSON), AND
+//  3. no flag named "json" is registered yet — pflag panics on duplicate
+//     registration, and commands that declare their own --json (event
+//     +subscribe, base +record-search/-get) keep their custom semantics.
+func ensureJSONShorthand(cmd *cobra.Command, s *Shortcut) {
+	// A shortcut that declares its own "json" flag defines custom semantics
+	// (e.g. pretty-print switch, request-body payload) — never a shorthand.
+	if shortcutDeclaresJSONFlag(s) {
+		return
+	}
+	if cmd.Flags().Lookup("format") == nil {
+		return
+	}
+	if !shortcutFormatSupportsJSON(s) {
+		return
+	}
+	// Safety net: pflag panics on duplicate registration.
+	if cmd.Flags().Lookup("json") != nil {
+		return
+	}
+	cmd.Flags().Bool("json", false, "shorthand for --format json")
+}
+
 func registerShortcutFlagsWithContext(ctx context.Context, cmd *cobra.Command, f *cmdutil.Factory, s *Shortcut) {
 	for _, fl := range s.Flags {
 		desc := fl.Desc
@@ -1234,10 +1285,8 @@ func registerShortcutFlagsWithContext(ctx context.Context, cmd *cobra.Command, f
 		cmdutil.RegisterFlagCompletion(cmd, "format", func(_ *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
 			return []string{"json", "pretty", "table", "ndjson", "csv"}, cobra.ShellCompDirectiveNoFileComp
 		})
-		if cmd.Flags().Lookup("json") == nil {
-			cmd.Flags().Bool("json", false, "shorthand for --format json")
-		}
 	}
+	ensureJSONShorthand(cmd, s)
 	if s.Risk == "high-risk-write" {
 		cmd.Flags().Bool("yes", false, "confirm high-risk operation")
 	}

shortcuts/common/runner_json_shorthand_test.go

@@ -0,0 +1,104 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package common
+
+import (
+	"context"
+	"testing"
+
+	"github.com/spf13/cobra"
+
+	"github.com/larksuite/cli/internal/cmdutil"
+)
+
+const jsonShorthandUsage = "shorthand for --format json"
+
+func mountTestShortcut(t *testing.T, s Shortcut) *cobra.Command {
+	t.Helper()
+	f, _, _, _ := cmdutil.TestFactory(t, nil)
+	parent := &cobra.Command{Use: "root"}
+	s.Mount(parent, f)
+	cmd, _, err := parent.Find([]string{s.Command})
+	if err != nil {
+		t.Fatalf("Find() error = %v", err)
+	}
+	return cmd
+}
+
+// 自定义 format 且 Enum 含 json → 注册简写（本次修复的核心行为）
+func TestJSONShorthand_CustomFormatWithJSONEnum_Registered(t *testing.T) {
+	cmd := mountTestShortcut(t, Shortcut{
+		Service: "mail", Command: "+fake-triage", Description: "x",
+		Flags:   []Flag{{Name: "format", Default: "table", Enum: []string{"table", "json", "data"}, Desc: "fmt"}},
+		Execute: func(context.Context, *RuntimeContext) error { return nil },
+	})
+	fl := cmd.Flags().Lookup("json")
+	if fl == nil {
+		t.Fatal("--json not registered for custom-format shortcut whose Enum contains json")
+	}
+	if fl.Usage != jsonShorthandUsage {
+		t.Errorf("usage = %q, want %q", fl.Usage, jsonShorthandUsage)
+	}
+	// 默认输出格式不被改变
+	if def := cmd.Flags().Lookup("format").DefValue; def != "table" {
+		t.Errorf("format default = %q, want table", def)
+	}
+}
+
+// 自定义 format 但 Enum 不含 json → 不注册
+func TestJSONShorthand_CustomFormatWithoutJSONEnum_NotRegistered(t *testing.T) {
+	cmd := mountTestShortcut(t, Shortcut{
+		Service: "x", Command: "+no-json", Description: "x",
+		Flags:   []Flag{{Name: "format", Default: "csv", Enum: []string{"csv", "table"}, Desc: "fmt"}},
+		Execute: func(context.Context, *RuntimeContext) error { return nil },
+	})
+	if cmd.Flags().Lookup("json") != nil {
+		t.Fatal("--json must NOT be registered when format Enum lacks json")
+	}
+}
+
+// 自定义 format 但无 Enum（现状 triage 形态）→ 不注册（Enum 是判定依据）
+func TestJSONShorthand_CustomFormatNoEnum_NotRegistered(t *testing.T) {
+	cmd := mountTestShortcut(t, Shortcut{
+		Service: "x", Command: "+legacy", Description: "x",
+		Flags:   []Flag{{Name: "format", Default: "table", Desc: "fmt"}},
+		Execute: func(context.Context, *RuntimeContext) error { return nil },
+	})
+	if cmd.Flags().Lookup("json") != nil {
+		t.Fatal("--json must NOT be registered when format has no Enum metadata")
+	}
+}
+
+// 自声明 json flag（subscribe 的 pretty / record-search 的请求体）→ 不覆盖、不 panic、语义保留
+func TestJSONShorthand_SelfDeclaredJSON_Preserved(t *testing.T) {
+	cmd := mountTestShortcut(t, Shortcut{
+		Service: "event", Command: "+fake-subscribe", Description: "x",
+		Flags: []Flag{
+			{Name: "json", Type: "bool", Desc: "pretty-print JSON instead of NDJSON"},
+		},
+		Execute: func(context.Context, *RuntimeContext) error { return nil },
+	})
+	fl := cmd.Flags().Lookup("json")
+	if fl == nil {
+		t.Fatal("self-declared --json missing")
+	}
+	if fl.Usage != "pretty-print JSON instead of NDJSON" {
+		t.Errorf("self-declared --json usage overwritten: %q", fl.Usage)
+	}
+}
+
+// 无自定义 format（普通命令）→ 注入默认 format + 简写（现状回归）
+func TestJSONShorthand_DefaultInjectedFormat_StillRegistered(t *testing.T) {
+	cmd := mountTestShortcut(t, Shortcut{
+		Service: "im", Command: "+plain", Description: "x",
+		Execute: func(context.Context, *RuntimeContext) error { return nil },
+	})
+	fl := cmd.Flags().Lookup("json")
+	if fl == nil {
+		t.Fatal("--json missing on default-format shortcut (regression)")
+	}
+	if fl.Usage != jsonShorthandUsage {
+		t.Errorf("usage = %q, want %q", fl.Usage, jsonShorthandUsage)
+	}
+}