fix: fold --json shorthand into format flag before consumption

shortcuts/common/runner.go

@@ -1026,6 +1026,7 @@ func newRuntimeContext(cmd *cobra.Command, f *cmdutil.Factory, s *Shortcut, conf
 	}
 	rctx.larkSDK = sdk
 
+	applyJSONShorthand(cmd, s)
 	rctx.Format = rctx.Str("format")
 	rctx.JqExpr, _ = cmd.Flags().GetString("jq")
 	return rctx, nil
@@ -1222,6 +1223,24 @@ func ensureJSONShorthand(cmd *cobra.Command, s *Shortcut) {
 	cmd.Flags().Bool("json", false, "shorthand for --format json")
 }
 
+// applyJSONShorthand folds the injected --json shorthand into the format flag
+// itself, before rctx.Format caches it — so both the cached value (OutFormat,
+// ValidateJqFlags, dry-run) and later runtime.Str("format") reads observe
+// "json". An explicitly passed --format always wins over the shorthand (the
+// shorthand only fills in when the user did not choose a format). Shortcuts
+// that declare their own "json" flag keep its custom semantics untouched.
+func applyJSONShorthand(cmd *cobra.Command, s *Shortcut) {
+	if shortcutDeclaresJSONFlag(s) {
+		return
+	}
+	if cmd.Flags().Lookup("json") == nil || cmd.Flags().Changed("format") {
+		return
+	}
+	if set, _ := cmd.Flags().GetBool("json"); set {
+		_ = cmd.Flags().Set("format", "json")
+	}
+}
+
 func registerShortcutFlagsWithContext(ctx context.Context, cmd *cobra.Command, f *cmdutil.Factory, s *Shortcut) {
 	for _, fl := range s.Flags {
 		desc := fl.Desc

shortcuts/common/runner_json_shorthand_test.go

@@ -88,6 +88,102 @@ func TestJSONShorthand_SelfDeclaredJSON_Preserved(t *testing.T) {
 	}
 }
 
+// parseMounted mounts the shortcut and parses args against the command's FlagSet
+// (registration side effects included), without executing RunE.
+func parseMounted(t *testing.T, s Shortcut, args []string) *cobra.Command {
+	t.Helper()
+	cmd := mountTestShortcut(t, s)
+	if err := cmd.ParseFlags(args); err != nil {
+		t.Fatalf("ParseFlags(%v) error = %v", args, err)
+	}
+	return cmd
+}
+
+func customFormatShortcut() Shortcut {
+	return 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 },
+	}
+}
+
+// --json 单独使用 → format 归一化为 json
+func TestApplyJSONShorthand_JSONAlone_SetsFormatJSON(t *testing.T) {
+	s := customFormatShortcut()
+	cmd := parseMounted(t, s, []string{"--json"})
+	applyJSONShorthand(cmd, &s)
+	if got := cmd.Flags().Lookup("format").Value.String(); got != "json" {
+		t.Fatalf("format = %q, want json", got)
+	}
+}
+
+// 显式 --format 优先（D2 决策）：--format table --json → table
+func TestApplyJSONShorthand_ExplicitFormatWins(t *testing.T) {
+	s := customFormatShortcut()
+	cmd := parseMounted(t, s, []string{"--format", "table", "--json"})
+	applyJSONShorthand(cmd, &s)
+	if got := cmd.Flags().Lookup("format").Value.String(); got != "table" {
+		t.Fatalf("format = %q, want table (explicit --format must win)", got)
+	}
+}
+
+// --format json --json → json（一致，无冲突）
+func TestApplyJSONShorthand_ExplicitJSONFormatConsistent(t *testing.T) {
+	s := customFormatShortcut()
+	cmd := parseMounted(t, s, []string{"--format", "json", "--json"})
+	applyJSONShorthand(cmd, &s)
+	if got := cmd.Flags().Lookup("format").Value.String(); got != "json" {
+		t.Fatalf("format = %q, want json", got)
+	}
+}
+
+// 均不传 → 默认值不变
+func TestApplyJSONShorthand_NoFlags_DefaultUntouched(t *testing.T) {
+	s := customFormatShortcut()
+	cmd := parseMounted(t, s, nil)
+	applyJSONShorthand(cmd, &s)
+	if got := cmd.Flags().Lookup("format").Value.String(); got != "table" {
+		t.Fatalf("format = %q, want table (default untouched)", got)
+	}
+}
+
+// 自声明 string 型 --json（record-search 形态：format+json 双声明）→ 归一化跳过
+func TestApplyJSONShorthand_SelfDeclaredStringJSON_Skipped(t *testing.T) {
+	s := Shortcut{
+		Service: "base", Command: "+fake-record-search", Description: "x",
+		Flags: []Flag{
+			{Name: "format", Default: "markdown", Enum: []string{"markdown", "json"}, Desc: "fmt"},
+			{Name: "json", Desc: "request body JSON object"},
+		},
+		Execute: func(context.Context, *RuntimeContext) error { return nil },
+	}
+	cmd := parseMounted(t, s, []string{"--json", `{"keyword":"Alice"}`})
+	applyJSONShorthand(cmd, &s)
+	if got := cmd.Flags().Lookup("format").Value.String(); got != "markdown" {
+		t.Fatalf("format = %q, want markdown (self-declared json must not normalize)", got)
+	}
+	if got := cmd.Flags().Lookup("json").Value.String(); got != `{"keyword":"Alice"}` {
+		t.Fatalf("request-body --json corrupted: %q", got)
+	}
+}
+
+// 自声明 bool 型 --json（subscribe 形态：无自定义 format，框架注入 format）→ 归一化跳过
+func TestApplyJSONShorthand_SelfDeclaredBoolJSON_Skipped(t *testing.T) {
+	s := 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 },
+	}
+	cmd := parseMounted(t, s, []string{"--json"})
+	applyJSONShorthand(cmd, &s)
+	// 注入的 format 默认即 json；这里断言的是 Changed 状态未被归一化污染
+	if cmd.Flags().Changed("format") {
+		t.Fatal("normalization must not touch format for shortcuts declaring their own --json")
+	}
+}
+
 // 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{