feat: add application domain description and slash command helpers

internal/registry/service_descriptions.json

@@ -3,6 +3,10 @@
     "en": { "title": "Approval", "description": "Approval instance, and task management" },
     "zh": { "title": "审批", "description": "审批实例、审批任务管理" }
   },
+  "application": {
+    "en": { "title": "Application", "description": "Open Platform app self-management: slash commands of the current bound app (NOT Miaoda low-code apps)" },
+    "zh": { "title": "应用管理", "description": "开放平台应用自管理：当前绑定应用的斜杠指令管理（非妙搭低代码应用）" }
+  },
   "apps": {
     "en": { "title": "Apps", "description": "Develop, deploy HTML, web pages and applications" },
     "zh": { "title": "应用", "description": "开发、部署 HTML、Web 页面和应用" }

shortcuts/application/slash_command_common.go

@@ -0,0 +1,98 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package application
+
+import (
+	"strings"
+
+	"github.com/larksuite/cli/errs"
+)
+
+// slashCommandBasePath is the raw v7 endpoint (not in meta_data.json / SDK).
+const slashCommandBasePath = "/open-apis/application/v7/app_slash_commands"
+
+// clientCacheHint is printed to stderr after every successful write.
+const clientCacheHint = "note: changes take ~5 minutes to appear in Feishu clients (client-side cache); the server state is already updated - list reflects it immediately."
+
+// parseDescriptionI18n parses repeated --description-i18n values ("<lang>=<text>",
+// split on the FIRST '='). Returns nil for empty input. Duplicate langs rejected.
+func parseDescriptionI18n(values []string) (map[string]string, error) {
+	if len(values) == 0 {
+		return nil, nil
+	}
+	m := make(map[string]string, len(values))
+	for _, v := range values {
+		idx := strings.Index(v, "=")
+		if idx <= 0 || idx == len(v)-1 {
+			return nil, errs.NewValidationError(errs.SubtypeInvalidArgument,
+				"invalid --description-i18n value %q: expected <lang>=<text> (e.g. zh_cn=你好)", v).
+				WithParam("--description-i18n")
+		}
+		lang := strings.TrimSpace(v[:idx])
+		text := v[idx+1:]
+		if lang == "" || strings.TrimSpace(text) == "" {
+			return nil, errs.NewValidationError(errs.SubtypeInvalidArgument,
+				"invalid --description-i18n value %q: language and text must be non-empty", v).
+				WithParam("--description-i18n")
+		}
+		if _, dup := m[lang]; dup {
+			return nil, errs.NewValidationError(errs.SubtypeInvalidArgument,
+				"duplicate language %q in --description-i18n", lang).
+				WithParam("--description-i18n")
+		}
+		m[lang] = text
+	}
+	return m, nil
+}
+
+// validateCommandName rejects empty and slash-prefixed command names.
+func validateCommandName(name, flagName string) error {
+	trimmed := strings.TrimSpace(name)
+	if trimmed == "" {
+		return errs.NewValidationError(errs.SubtypeInvalidArgument,
+			"%s must not be empty", flagName).WithParam(flagName)
+	}
+	if strings.HasPrefix(trimmed, "/") {
+		return errs.NewValidationError(errs.SubtypeInvalidArgument,
+			"%s must not start with \"/\" - the slash is implied (use %q)",
+			flagName, strings.TrimPrefix(trimmed, "/")).WithParam(flagName)
+	}
+	return nil
+}
+
+// buildSlashCommandBody assembles a create/update request body. Only provided
+// fields are included: PATCH is field-level partial (absent top-level fields
+// are preserved server-side; a provided i18n map REPLACES the whole map).
+// icon sits at the top level, sibling of description (verified live; the
+// official create sample nesting icon inside description is a doc bug).
+func buildSlashCommandBody(command, description string, i18n map[string]string, iconKey string) map[string]interface{} {
+	body := map[string]interface{}{}
+	if command != "" {
+		body["command"] = command
+	}
+	if description != "" || len(i18n) > 0 {
+		desc := map[string]interface{}{}
+		if description != "" {
+			desc["default_value"] = description
+		}
+		if len(i18n) > 0 {
+			desc["i18n"] = i18n
+		}
+		body["description"] = desc
+	}
+	if iconKey != "" {
+		body["icon"] = map[string]interface{}{"icon_key": iconKey}
+	}
+	return body
+}
+
+// isCommandExists reports whether err is the server-side name-collision error
+// (code=40000000, message contains "command already exists"; verified live).
+func isCommandExists(err error) bool {
+	p, ok := errs.ProblemOf(err)
+	if !ok {
+		return false
+	}
+	return strings.Contains(p.Message, "command already exists")
+}

shortcuts/application/slash_command_common_test.go

@@ -0,0 +1,90 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package application
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/larksuite/cli/errs"
+)
+
+func TestParseDescriptionI18n_OK(t *testing.T) {
+	m, err := parseDescriptionI18n([]string{"zh_cn=你好", "en_us=Hello=World"})
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if m["zh_cn"] != "你好" {
+		t.Errorf("zh_cn = %q", m["zh_cn"])
+	}
+	// 只按首个 = 分割：值内可含 =
+	if m["en_us"] != "Hello=World" {
+		t.Errorf("en_us = %q", m["en_us"])
+	}
+}
+
+func TestParseDescriptionI18n_Empty(t *testing.T) {
+	m, err := parseDescriptionI18n(nil)
+	if err != nil || m != nil {
+		t.Fatalf("nil input: m=%v err=%v", m, err)
+	}
+}
+
+func TestParseDescriptionI18n_BadFormat(t *testing.T) {
+	for _, bad := range []string{"zh_cn", "=text", "zh_cn=", "  =x"} {
+		_, err := parseDescriptionI18n([]string{bad})
+		if err == nil {
+			t.Errorf("%q: expected error", bad)
+			continue
+		}
+		p, ok := errs.ProblemOf(err)
+		if !ok || p.Category != errs.CategoryValidation {
+			t.Errorf("%q: expected validation problem, got %v", bad, err)
+		}
+	}
+}
+
+func TestParseDescriptionI18n_DuplicateLang(t *testing.T) {
+	_, err := parseDescriptionI18n([]string{"zh_cn=a", "zh_cn=b"})
+	if err == nil || !strings.Contains(err.Error(), "duplicate language") {
+		t.Fatalf("expected duplicate language error, got %v", err)
+	}
+}
+
+func TestValidateCommandName(t *testing.T) {
+	if err := validateCommandName("greet", "--command"); err != nil {
+		t.Fatalf("greet: %v", err)
+	}
+	for _, bad := range []string{"", "  ", "/greet"} {
+		if err := validateCommandName(bad, "--command"); err == nil {
+			t.Errorf("%q: expected error", bad)
+		}
+	}
+}
+
+func TestBuildSlashCommandBody(t *testing.T) {
+	body := buildSlashCommandBody("greet", "hi", map[string]string{"zh_cn": "你好"}, "skill_outlined")
+	if body["command"] != "greet" {
+		t.Errorf("command = %v", body["command"])
+	}
+	desc := body["description"].(map[string]interface{})
+	if desc["default_value"] != "hi" {
+		t.Errorf("default_value = %v", desc["default_value"])
+	}
+	if desc["i18n"].(map[string]string)["zh_cn"] != "你好" {
+		t.Errorf("i18n = %v", desc["i18n"])
+	}
+	// icon 与 description 顶层平级（实测钉死，文档 create 示例是笔误）
+	if body["icon"].(map[string]interface{})["icon_key"] != "skill_outlined" {
+		t.Errorf("icon = %v", body["icon"])
+	}
+	// partial：不提供的字段不出现（PATCH 语义依赖）
+	partial := buildSlashCommandBody("", "", nil, "skill_outlined")
+	if _, has := partial["command"]; has {
+		t.Error("empty command must be omitted")
+	}
+	if _, has := partial["description"]; has {
+		t.Error("empty description must be omitted")
+	}
+}