fix(apps): omit empty --environment param; refine dry-run tests and skill doc

Address PR #1735 review:
- omit-empty: when --environment is unset, drop the env query key entirely
  instead of sending env="" — matches the family's omit-empty convention
  (cf. page_token) and miaoda-cli's "no dbBranch when unset". Add dbEnvParams
  helper; apply across all db shortcuts (execute, table-list/-get, quota-get,
  changelog-list, audit-list/-set/-status, data-export/-import) plus the
  export/import query params, queryExportTotal and audit-list table/status probes.
- e2e dry-run assertions pin env is omitted via .Exists() (was Equal "").
- skill doc (lark-apps-db): rewrite the --environment guidance from an agent's
  decision POV — read vs write, single-env writes hit online prod, explicit dev
  on single-env as a probe; drop redundant/changelog phrasing.

shortcuts/apps/apps_db_audit_list.go

@@ -40,7 +40,7 @@ var AppsDBAuditList = common.Shortcut{
 		{Name: "until", Desc: "filter: event at or before; same formats as --since"},
 		{Name: "page-size", Type: "int", Default: "20", Desc: "page size"},
 		{Name: "page-token", Desc: "pagination cursor from previous response"},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "target db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "target db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -145,7 +145,10 @@ func fetchExistingTables(rctx *common.RuntimeContext, appID, env string) (map[st
 	existing := map[string]bool{}
 	token := ""
 	for {
-		params := map[string]interface{}{"env": env, "page_size": 100}
+		params := map[string]interface{}{"page_size": 100}
+		if env != "" {
+			params["env"] = env
+		}
 		if token != "" {
 			params["page_token"] = token
 		}
@@ -168,7 +171,11 @@ func fetchExistingTables(rctx *common.RuntimeContext, appID, env string) (map[st
 
 // fetchAuditEnabledTables 拉审计状态，返回当前已开启审计的表名集合（status 命令同源接口）。
 func fetchAuditEnabledTables(rctx *common.RuntimeContext, appID, env string) (map[string]bool, error) {
-	data, err := rctx.CallAPITyped("GET", appAuditStatusPath(appID), map[string]interface{}{"env": env}, nil)
+	statusParams := map[string]interface{}{}
+	if env != "" {
+		statusParams["env"] = env
+	}
+	data, err := rctx.CallAPITyped("GET", appAuditStatusPath(appID), statusParams, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -208,11 +215,10 @@ func auditListTables(rctx *common.RuntimeContext) []string {
 
 // buildAuditListParams 组装 audit_list 查询参数：env / tables(逗号拼接) / page_size 及可选 since/until/page_token。
 func buildAuditListParams(rctx *common.RuntimeContext, tables []string) map[string]interface{} {
-	params := map[string]interface{}{
-		"env":       dbEnv(rctx),
+	params := dbEnvParams(rctx, map[string]interface{}{
 		"tables":    strings.Join(tables, ","),
 		"page_size": rctx.Int("page-size"),
-	}
+	})
 	addStr := func(flag, key string) {
 		if v := strings.TrimSpace(rctx.Str(flag)); v != "" {
 			params[key] = v

shortcuts/apps/apps_db_audit_set.go

@@ -35,7 +35,7 @@ var AppsDBAuditEnable = common.Shortcut{
 		{Name: "app-id", Desc: "Miaoda app id", Required: true},
 		{Name: "table", Desc: "table to enable audit for", Required: true},
 		{Name: "retention", Default: "7d", Enum: auditRetentions, Desc: "how long to keep audit logs"},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "target db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "target db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -47,7 +47,7 @@ var AppsDBAuditEnable = common.Shortcut{
 		return common.NewDryRunAPI().
 			POST(appAuditSetPath(appID)).
 			Desc("Enable table audit").
-			Params(map[string]interface{}{"env": dbEnv(rctx)}).
+			Params(dbEnvParams(rctx, map[string]interface{}{})).
 			Body(map[string]interface{}{"table": strings.TrimSpace(rctx.Str("table")), "enabled": true, "retention": rctx.Str("retention")})
 	},
 	Execute: func(ctx context.Context, rctx *common.RuntimeContext) error {
@@ -60,7 +60,7 @@ var AppsDBAuditEnable = common.Shortcut{
 		stop := rctx.StartSpinner("Enabling audit logging for " + table)
 		defer stop()
 		data, err := rctx.CallAPITyped("POST", appAuditSetPath(appID),
-			map[string]interface{}{"env": dbEnv(rctx)},
+			dbEnvParams(rctx, map[string]interface{}{}),
 			map[string]interface{}{"table": table, "enabled": true, "retention": retention})
 		stop()
 		if err != nil {
@@ -96,7 +96,7 @@ var AppsDBAuditDisable = common.Shortcut{
 	Flags: append([]common.Flag{
 		{Name: "app-id", Desc: "Miaoda app id", Required: true},
 		{Name: "table", Desc: "table to disable audit for", Required: true},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "target db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "target db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -108,7 +108,7 @@ var AppsDBAuditDisable = common.Shortcut{
 		return common.NewDryRunAPI().
 			POST(appAuditSetPath(appID)).
 			Desc("Disable table audit").
-			Params(map[string]interface{}{"env": dbEnv(rctx)}).
+			Params(dbEnvParams(rctx, map[string]interface{}{})).
 			Body(map[string]interface{}{"table": strings.TrimSpace(rctx.Str("table")), "enabled": false})
 	},
 	Execute: func(ctx context.Context, rctx *common.RuntimeContext) error {
@@ -118,7 +118,7 @@ var AppsDBAuditDisable = common.Shortcut{
 		}
 		table := strings.TrimSpace(rctx.Str("table"))
 		data, err := rctx.CallAPITyped("POST", appAuditSetPath(appID),
-			map[string]interface{}{"env": dbEnv(rctx)},
+			dbEnvParams(rctx, map[string]interface{}{}),
 			map[string]interface{}{"table": table, "enabled": false})
 		if err != nil {
 			return withAppsHint(err, dbAuditSetHint)

shortcuts/apps/apps_db_audit_status.go

@@ -30,7 +30,7 @@ var AppsDBAuditStatus = common.Shortcut{
 	Flags: append([]common.Flag{
 		{Name: "app-id", Desc: "Miaoda app id", Required: true},
 		{Name: "table", Desc: "show status for a single table (default: all configured tables)"},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "target db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "target db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -75,7 +75,7 @@ var AppsDBAuditStatus = common.Shortcut{
 
 // buildAuditStatusParams 组装 audit_status 查询参数：env 及可选 table（单表查询）。
 func buildAuditStatusParams(rctx *common.RuntimeContext) map[string]interface{} {
-	params := map[string]interface{}{"env": dbEnv(rctx)}
+	params := dbEnvParams(rctx, map[string]interface{}{})
 	if t := strings.TrimSpace(rctx.Str("table")); t != "" {
 		params["table"] = t
 	}

shortcuts/apps/apps_db_changelog_list.go

@@ -39,7 +39,7 @@ var AppsDBChangelogList = common.Shortcut{
 		{Name: "until", Desc: "filter: changed at or before; same formats as --since"},
 		{Name: "page-size", Type: "int", Default: "20", Desc: "page size"},
 		{Name: "page-token", Desc: "pagination cursor from previous response"},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "target db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "target db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -77,10 +77,9 @@ var AppsDBChangelogList = common.Shortcut{
 
 // buildChangelogParams 组装 changelog_list 查询参数：env / page_size 及可选 table/change_id/since/until/page_token。
 func buildChangelogParams(rctx *common.RuntimeContext) map[string]interface{} {
-	params := map[string]interface{}{
-		"env":       dbEnv(rctx),
+	params := dbEnvParams(rctx, map[string]interface{}{
 		"page_size": rctx.Int("page-size"),
-	}
+	})
 	addStr := func(flag, key string) {
 		if v := strings.TrimSpace(rctx.Str(flag)); v != "" {
 			params[key] = v

shortcuts/apps/apps_db_data_export.go

@@ -47,7 +47,7 @@ var AppsDBDataExport = common.Shortcut{
 		{Name: "table", Desc: "source table", Required: true},
 		{Name: "output", Desc: "local output path; extension picks format .csv/.json/.sql (default: <table>.csv)"},
 		{Name: "limit", Type: "int", Default: "5000", Desc: "max rows to export (1..5000)"},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "source db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "source db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -75,10 +75,10 @@ var AppsDBDataExport = common.Shortcut{
 		return common.NewDryRunAPI().
 			GET(appDataExportPath(appID)).
 			Desc("Export Miaoda app table data (raw bytes)").
-			Params(map[string]interface{}{
-				"env": dbEnv(rctx), "table": strings.TrimSpace(rctx.Str("table")),
+			Params(dbEnvParams(rctx, map[string]interface{}{
+				"table":  strings.TrimSpace(rctx.Str("table")),
 				"format": format, "limit": rctx.Int("limit"),
-			})
+			}))
 	},
 	Execute: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		appID, err := requireAppID(rctx.Str("app-id"))
@@ -95,15 +95,18 @@ var AppsDBDataExport = common.Shortcut{
 		// total 查询失败不阻断导出——回退到按导出文件内容数行。
 		total, totalErr := queryExportTotal(rctx, appID, dbEnv(rctx), table)
 
+		exportQuery := larkcore.QueryParams{
+			"table":  []string{table},
+			"format": []string{format},
+			"limit":  []string{strconv.Itoa(rctx.Int("limit"))},
+		}
+		if env := dbEnv(rctx); env != "" {
+			exportQuery["env"] = []string{env}
+		}
 		resp, err := rctx.DoAPI(&larkcore.ApiReq{
-			HttpMethod: http.MethodGet,
-			ApiPath:    appDataExportPath(appID),
-			QueryParams: larkcore.QueryParams{
-				"env":    []string{dbEnv(rctx)},
-				"table":  []string{table},
-				"format": []string{format},
-				"limit":  []string{strconv.Itoa(rctx.Int("limit"))},
-			},
+			HttpMethod:  http.MethodGet,
+			ApiPath:     appDataExportPath(appID),
+			QueryParams: exportQuery,
 		})
 		if err != nil {
 			return withAppsHint(errs.NewNetworkError(errs.SubtypeNetworkTransport, "export request failed").WithCause(err).WithRetryable(), dbDataExportHint)
@@ -157,8 +160,11 @@ var AppsDBDataExport = common.Shortcut{
 // queryExportTotal 调 GetAppTableRecordList（page_size=1）取 total（符合条件的记录总数）。
 // 该接口与 +db-data-export 同为 spark:app:read scope，避免导出命令被迫升级到写权限。
 func queryExportTotal(rctx *common.RuntimeContext, appID, env, table string) (int, error) {
-	raw, err := rctx.CallAPITyped("GET", appTableRecordsPath(appID, table),
-		map[string]interface{}{"env": env, "page_size": 1}, nil)
+	params := map[string]interface{}{"page_size": 1}
+	if env != "" {
+		params["env"] = env
+	}
+	raw, err := rctx.CallAPITyped("GET", appTableRecordsPath(appID, table), params, nil)
 	if err != nil {
 		return 0, err
 	}

shortcuts/apps/apps_db_data_import.go

@@ -44,7 +44,7 @@ var AppsDBDataImport = common.Shortcut{
 		{Name: "app-id", Desc: "Miaoda app id", Required: true},
 		{Name: "file", Desc: "local data file (.csv/.json), relative to cwd", Required: true},
 		{Name: "table", Desc: "target table (default: file name without extension)"},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "target db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "target db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -76,7 +76,7 @@ var AppsDBDataImport = common.Shortcut{
 		return common.NewDryRunAPI().
 			POST(appDataImportPath(appID)).
 			Desc("Import data file into Miaoda app table (multipart upload)").
-			Params(map[string]interface{}{"env": dbEnv(rctx), "table": importTableName(rctx)}).
+			Params(dbEnvParams(rctx, map[string]interface{}{"table": importTableName(rctx)})).
 			Body(map[string]interface{}{"file_name": fileName, "file": "<contents of --file>"})
 	},
 	Execute: func(ctx context.Context, rctx *common.RuntimeContext) error {
@@ -100,10 +100,14 @@ var AppsDBDataImport = common.Shortcut{
 		fd.AddField("file_name", fileName)
 		fd.AddFile("file", bytes.NewReader(content))
 
+		importQuery := larkcore.QueryParams{"table": []string{table}}
+		if env := dbEnv(rctx); env != "" {
+			importQuery["env"] = []string{env}
+		}
 		resp, err := rctx.DoAPI(&larkcore.ApiReq{
 			HttpMethod:  http.MethodPost,
 			ApiPath:     appDataImportPath(appID),
-			QueryParams: larkcore.QueryParams{"env": []string{dbEnv(rctx)}, "table": []string{table}},
+			QueryParams: importQuery,
 			Body:        fd,
 		}, larkcore.WithFileUpload())
 		if err != nil {

shortcuts/apps/apps_db_execute.go

@@ -66,7 +66,7 @@ var AppsDBExecute = common.Shortcut{
 		{Name: "sql", Desc: "SQL text; use - to read stdin. Mutually exclusive with --file",
 			Input: []string{common.Stdin}},
 		{Name: "file", Desc: "path to a .sql file (relative to cwd). Mutually exclusive with --sql"},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "target db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "target db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -291,10 +291,9 @@ func parseErrorSentinel(data string) (int, string) {
 //
 // CLI 永远走 DBA 模式，原子性由用户在 SQL 内显式 BEGIN/COMMIT 控制；不暴露 transactional flag 给用户。
 func buildDBSQLParams(rctx *common.RuntimeContext) map[string]interface{} {
-	return map[string]interface{}{
-		"env":           dbEnv(rctx),
+	return dbEnvParams(rctx, map[string]interface{}{
 		"transactional": false,
-	}
+	})
 }
 
 // resolveExecuteSQL 返回要执行的 SQL，在用时（DryRun/Execute）现读，使 --file 的内容

shortcuts/apps/apps_db_quota_get.go

@@ -29,7 +29,7 @@ var AppsDBQuotaGet = common.Shortcut{
 	HasFormat: true,
 	Flags: append([]common.Flag{
 		{Name: "app-id", Desc: "Miaoda app id", Required: true},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "target db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "target db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -41,14 +41,14 @@ var AppsDBQuotaGet = common.Shortcut{
 		return common.NewDryRunAPI().
 			GET(appDbQuotaPath(appID)).
 			Desc("Get Miaoda app database storage usage").
-			Params(map[string]interface{}{"env": dbEnv(rctx)})
+			Params(dbEnvParams(rctx, map[string]interface{}{}))
 	},
 	Execute: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		appID, err := requireAppID(rctx.Str("app-id"))
 		if err != nil {
 			return err
 		}
-		data, err := rctx.CallAPITyped("GET", appDbQuotaPath(appID), map[string]interface{}{"env": dbEnv(rctx)}, nil)
+		data, err := rctx.CallAPITyped("GET", appDbQuotaPath(appID), dbEnvParams(rctx, map[string]interface{}{}), nil)
 		if err != nil {
 			return withAppsHint(err, appIDListHint)
 		}

shortcuts/apps/apps_db_table_get.go

@@ -37,7 +37,7 @@ var AppsDBTableGet = common.Shortcut{
 	Flags: append([]common.Flag{
 		{Name: "app-id", Desc: "app id", Required: true},
 		{Name: "table", Desc: "table name", Required: true},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "target db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "target db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -80,7 +80,7 @@ var AppsDBTableGet = common.Shortcut{
 // CLI 检测 rctx.Format == "pretty" 时给 server 带 format=ddl，要求返 CREATE 语句文本；
 // 其他 format（含默认 json）不传该参数，让 server 返默认结构化字段。
 func buildDBTableGetParams(rctx *common.RuntimeContext) map[string]interface{} {
-	params := map[string]interface{}{"env": dbEnv(rctx)}
+	params := dbEnvParams(rctx, map[string]interface{}{})
 	if rctx.Format == "pretty" {
 		params["format"] = "ddl"
 	}

shortcuts/apps/apps_db_table_list.go

@@ -42,7 +42,7 @@ var AppsDBTableList = common.Shortcut{
 		{Name: "app-id", Desc: "app id", Required: true},
 		{Name: "page-size", Type: "int", Default: "20", Desc: "page size"},
 		{Name: "page-token", Desc: "pagination cursor from previous response"},
-	}, dbEnvFlags("dev", []string{"dev", "online"}, "target db environment (default dev; use online for the online environment, or for an app whose DB is not multi-env)")...),
+	}, dbEnvFlags("", []string{"dev", "online"}, "target db environment; leave unset to auto-select (multi-env app uses dev, single-env uses online), or pass dev/online")...),
 	Validate: func(ctx context.Context, rctx *common.RuntimeContext) error {
 		if _, err := requireAppID(rctx.Str("app-id")); err != nil {
 			return err
@@ -110,10 +110,9 @@ func projectTableListItems(raw interface{}) []dbTableListItem {
 }
 
 func buildDBTableListParams(rctx *common.RuntimeContext) map[string]interface{} {
-	params := map[string]interface{}{
-		"env":       dbEnv(rctx),
+	params := dbEnvParams(rctx, map[string]interface{}{
 		"page_size": rctx.Int("page-size"),
-	}
+	})
 	if token := strings.TrimSpace(rctx.Str("page-token")); token != "" {
 		params["page_token"] = token
 	}

shortcuts/apps/db_common.go

@@ -34,6 +34,16 @@ func dbEnv(rctx *common.RuntimeContext) string {
 	return rctx.Str("environment")
 }
 
+// dbEnvParams 把 env 并入 params：仅当显式指定了环境（非空）才带 env 键；未指定（空）时
+// 省略该键，由服务端按应用多环境状态自动选分支（多环境→dev，单环境→online）。与家族对
+// 空可选参数的 omit-empty 约定一致——不发空串，wire 上真正不带 env。原样返回同一个 map 便于链式。
+func dbEnvParams(rctx *common.RuntimeContext, params map[string]interface{}) map[string]interface{} {
+	if env := dbEnv(rctx); env != "" {
+		params["env"] = env
+	}
+	return params
+}
+
 // rejectLegacyEnvFlag 在 Validate 阶段拦截已移除的 --env：显式传了就报清晰的 validation 错，指向 --environment。
 func rejectLegacyEnvFlag(rctx *common.RuntimeContext) error {
 	if rctx.Changed("env") {

skills/lark-apps/references/lark-apps-db-execute.md

@@ -11,7 +11,7 @@
 - 必填：`--app-id`，以及 `--sql` / `--file` 二选一（互斥）。
 - `--sql`：内联 SQL 文本；传 `-` 时从 stdin 读。绝对路径文件经 stdin 传入：`--sql - < <absolute-path>`（shell 解析路径，CLI 仅接收内容）。
 - `--file`：`.sql` 文件路径，需为工作目录内的相对路径（如 `--file ./migration.sql`）；绝对路径、或经 `..`/符号链接越出工作目录的路径会被拒绝。文件不在工作目录内时，改用 `--sql - < <文件路径>` 经 stdin 传入。
-- `--environment` 枚举：`dev` / `online`，**默认 `dev`**；操作线上库、或**未开启多环境的应用（其数据库在 `online`，没有 dev 分支）**时显式 `--environment online`。旧名 `--env` 已**移除**：传入会报 validation 错（提示改用 `--environment`），一律用 `--environment`。
+- `--environment` 枚举：`dev` / `online`，**不传则由服务端按应用是否开启多环境自动选择（多环境→`dev`，未开启多环境→`online`）**；要固定环境就显式传 `--environment dev|online`。**未开启多环境的应用显式传 `--environment dev` 会报错（无 dev 分支）——这类应用不传 `--environment`（走 `online`）或显式 `--environment online`**。旧名 `--env` 已**移除**：传入会报 validation 错（提示改用 `--environment`），一律用 `--environment`。
 - risk 是 `high-risk-write`（SQL 可含 DML/DDL）：任何执行都需 `--yes`，否则返回 `confirmation_required` / exit 10。`--dry-run` 预览不需要 `--yes`。
 - **不会自动为你包事务，事务边界需自己在 SQL 里控制**：多语句默认逐条独立提交，中间某条失败时前序语句已生效、不会回滚；若需要「要么全部成功、要么全部回滚」的原子性，请在 SQL 内显式写 `BEGIN … COMMIT`（详见下「Agent 规则」）。
 

skills/lark-apps/references/lark-apps-db.md

@@ -28,7 +28,7 @@
 
 ## 约定（先读）
 
-- **环境 `--environment dev|online`（所有 db 命令统一默认 `dev`）**：看表、看结构、数据导入导出、变更追溯、审计、配额都按环境区分，写操作建议先在 `dev` 验。**注意：只有开启了多环境（`+db-env-create`）的应用才有 `dev` 分支；未开启多环境的应用其数据库在 `online`——对这类应用必须显式 `--environment online`，否则默认的 `dev` 分支不存在、会报错**。旧名 `--env` 已**移除**：传入会报 validation 错（提示改用 `--environment`），一律用 `--environment`。`+db-env-diff`/`+db-env-migrate` 是「dev→online 发布」语义、`+db-recovery-*` 作用于当前库，二者**没有** `--environment`。
+- **环境 `--environment dev|online`（可省略）**：看表、看结构、数据导入导出、变更追溯、审计、配额都按环境区分。省略 `--environment` 时 CLI 不带该参数、由服务端按应用形态自动选分支——多环境应用走 `dev`、未开多环境的走 `online`；要固定环境就显式传。唯一会报错的组合：对未开多环境的应用显式传 `--environment dev`（无 `dev` 分支）。写操作建议先在 `dev` 验（仅多环境应用有 `dev`）。旧名 `--env` 已**移除**：传入会报 validation 错（提示改用 `--environment`），一律用 `--environment`。`+db-env-diff`/`+db-env-migrate` 是「dev→online 发布」语义、`+db-recovery-*` 作用于当前库，二者**没有** `--environment`。
 - **本地文件 / `--output` 用工作目录内相对路径**：导入 `--file ./orders.csv`、导出 `--output ./out.csv`；绝对路径、或经 `..`/符号链接越出工作目录的 `--output` 会被拒（validation / exit 2）。路径在别处先 `cd` 过去或改成相对路径。
 - **高危操作必须带 `--yes`**：`+db-env-create`、`+db-data-import`、`+db-env-migrate`、`+db-recovery-apply` 缺省会被确认关卡拦下；动手前先用对应的预览命令或 `--dry-run` 看清影响。
 - **时间参数按口语自然传**（`--since`/`--until`/`--target`），格式见末尾。
@@ -154,7 +154,7 @@ lark-cli apps +db-quota-get --app-id app_xxx --environment dev
 
 ## Agent 规则
 
-- 用户说「本地 / 开发库 / 调试库」优先 `--environment dev`，线上排查用 `--environment online`；数据面写操作（导入 / 审计开关）默认先在 `dev` 验再动 `online`。
+- 用户说「本地 / 开发库 / 调试库」优先 `--environment dev`，线上排查用 `--environment online`；数据面写操作（导入 / 审计开关）建议先在 `dev` 验再动 `online`。**注意省略 `--environment` 时写操作会落到服务端选中的分支——单环境应用即 `online`（生产）**：不确定应用是否多环境时，写操作显式传 `--environment`；显式 `dev` 在单环境应用上会安全报错（无 dev 分支），正好当「是否多环境」的探针用。
 - 看表用 `+db-table-list`，看结构用 `+db-table-get`（要建表语句加 `--format pretty`）；`+db-env-create` 仅用于存量单库拆多环境，新建的 full_stack 应用一般不需要。
 - 四个高危命令（`+db-env-create`、`+db-data-import`、`+db-env-migrate`、`+db-recovery-apply`）动手前先看清影响再带 `--yes`：发布 / 恢复先跑对应预览 `+db-env-diff` / `+db-recovery-diff`，导入无预览命令、可先 `--dry-run` 看请求或先在 `--environment dev` 验；不要静默追加 `--yes`，遇 confirmation_required（exit 10）按 lark-shared 协议向用户确认不可逆风险后再补 `--yes` 重试。
 - 导入 / 导出的本地路径用工作目录内相对路径；超大表导出会被行数 / 体积上限拒，改用 `+db-execute` 分批。

tests/cli_e2e/apps/apps_db_execute_dryrun_test.go

@@ -15,11 +15,11 @@ import (
 )
 
 // TestAppsDBExecuteDryRun pins +db-execute 复用存量 URL，CLI 永远走 DBA 模式
-// （?transactional=false），sql body 由 --sql 透传，默认 env=dev。
+// （?transactional=false），sql body 由 --sql 透传，默认不传 env（空值，由服务端按 workspace 定分支）。
 func TestAppsDBExecuteDryRun(t *testing.T) {
 	setAppsDryRunEnv(t)
 
-	t.Run("DefaultEnvIsDevAndTransactionalFalse", func(t *testing.T) {
+	t.Run("DefaultEnvUnsetAndTransactionalFalse", func(t *testing.T) {
 		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
 		t.Cleanup(cancel)
 
@@ -37,8 +37,8 @@ func TestAppsDBExecuteDryRun(t *testing.T) {
 			"CLI is DBA mode → must send transactional=false in query")
 		assert.False(t, gjson.Get(result.Stdout, "api.0.body.transactional").Exists(),
 			"transactional should be in query, not body")
-		assert.Equal(t, "dev", gjson.Get(result.Stdout, "api.0.params.env").String(),
-			"default env must be dev (not production)")
+		assert.False(t, gjson.Get(result.Stdout, "api.0.params.env").Exists(),
+			"default: no --environment → env key must be omitted (server picks workspace default branch)")
 	})
 
 	t.Run("OnlineEnvSwitch", func(t *testing.T) {

tests/cli_e2e/apps/apps_db_table_list_dryrun_test.go

@@ -19,7 +19,7 @@ import (
 func TestAppsDBTableListDryRun(t *testing.T) {
 	setAppsDryRunEnv(t)
 
-	t.Run("DefaultsToDevAndPageSize20", func(t *testing.T) {
+	t.Run("DefaultsToNoEnvAndPageSize20", func(t *testing.T) {
 		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
 		t.Cleanup(cancel)
 
@@ -32,7 +32,8 @@ func TestAppsDBTableListDryRun(t *testing.T) {
 
 		assert.Equal(t, "GET", gjson.Get(result.Stdout, "api.0.method").String())
 		assert.Equal(t, "/open-apis/spark/v1/apps/app_x/tables", gjson.Get(result.Stdout, "api.0.url").String())
-		assert.Equal(t, "dev", gjson.Get(result.Stdout, "api.0.params.env").String())
+		assert.False(t, gjson.Get(result.Stdout, "api.0.params.env").Exists(),
+			"default: no --environment → env key must be omitted (server picks workspace default branch)")
 		assert.Equal(t, "20", gjson.Get(result.Stdout, "api.0.params.page_size").String())
 		assert.False(t, gjson.Get(result.Stdout, "api.0.params.page_token").Exists(),
 			"empty page_token must be omitted")