feat(mail): support scheduled send via --send-time

shortcuts/mail/draft/service.go

@@ -59,8 +59,12 @@ func UpdateWithRaw(runtime *common.RuntimeContext, mailboxID, draftID, rawEML st
 	return err
 }
 
-func Send(runtime *common.RuntimeContext, mailboxID, draftID string) (map[string]interface{}, error) {
-	return runtime.CallAPI("POST", mailboxPath(mailboxID, "drafts", draftID, "send"), nil, nil)
+func Send(runtime *common.RuntimeContext, mailboxID, draftID, sendTime string) (map[string]interface{}, error) {
+	var bodyParams map[string]interface{}
+	if sendTime != "" {
+		bodyParams = map[string]interface{}{"send_time": sendTime}
+	}
+	return runtime.CallAPI("POST", mailboxPath(mailboxID, "drafts", draftID, "send"), nil, bodyParams)
 }
 
 func extractDraftID(data map[string]interface{}) string {

shortcuts/mail/helpers.go

@@ -17,6 +17,7 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/larksuite/cli/extension/fileio"
 	"github.com/larksuite/cli/internal/auth"
@@ -1906,6 +1907,27 @@ func checkAttachmentSizeLimit(fio fileio.FileIO, filePaths []string, extraBytes
 	return nil
 }
 
+// validateSendTime checks that --send-time, if provided, requires --confirm-send,
+// is a valid Unix timestamp in seconds, and is at least 5 minutes in the future.
+func validateSendTime(runtime *common.RuntimeContext) error {
+	sendTime := runtime.Str("send-time")
+	if sendTime == "" {
+		return nil
+	}
+	if !runtime.Bool("confirm-send") {
+		return fmt.Errorf("--send-time requires --confirm-send to be set")
+	}
+	ts, err := strconv.ParseInt(sendTime, 10, 64)
+	if err != nil {
+		return fmt.Errorf("--send-time must be a valid Unix timestamp in seconds, got %q", sendTime)
+	}
+	minTime := time.Now().Unix() + 5*60
+	if ts < minTime {
+		return fmt.Errorf("--send-time must be at least 5 minutes in the future (minimum: %d, got: %d)", minTime, ts)
+	}
+	return nil
+}
+
 // validateConfirmSendScope checks that the user's token includes the
 // mail:user_mailbox.message:send scope when --confirm-send is set.
 // This scope is not declared in the shortcut's static Scopes (to keep the

shortcuts/mail/mail_forward.go

@@ -34,6 +34,7 @@ var MailForward = common.Shortcut{
 		{Name: "attach", Desc: "Attachment file path(s), comma-separated, appended after original attachments (relative path only)"},
 		{Name: "inline", Desc: "Inline images as a JSON array. Each entry: {\"cid\":\"<unique-id>\",\"file_path\":\"<relative-path>\"}. All file_path values must be relative paths. Cannot be used with --plain-text. CID images are embedded via <img src=\"cid:...\"> in the HTML body. CID is a unique identifier, e.g. a random hex string like \"a1b2c3d4e5f6a7b8c9d0\"."},
 		{Name: "confirm-send", Type: "bool", Desc: "Send the forward immediately instead of saving as draft. Only use after the user has explicitly confirmed recipients and content."},
+		{Name: "send-time", Desc: "Scheduled send time as a Unix timestamp in seconds. Must be at least 5 minutes in the future. Use with --confirm-send to schedule the email."},
 	},
 	DryRun: func(ctx context.Context, runtime *common.RuntimeContext) *common.DryRunAPI {
 		messageId := runtime.Str("message-id")
@@ -59,6 +60,9 @@ var MailForward = common.Shortcut{
 		if err := validateConfirmSendScope(runtime); err != nil {
 			return err
 		}
+		if err := validateSendTime(runtime); err != nil {
+			return err
+		}
 		if runtime.Bool("confirm-send") {
 			if err := validateComposeHasAtLeastOneRecipient(runtime.Str("to"), runtime.Str("cc"), runtime.Str("bcc")); err != nil {
 				return err
@@ -76,6 +80,7 @@ var MailForward = common.Shortcut{
 		attachFlag := runtime.Str("attach")
 		inlineFlag := runtime.Str("inline")
 		confirmSend := runtime.Bool("confirm-send")
+		sendTime := runtime.Str("send-time")
 
 		mailboxID := resolveComposeMailboxID(runtime)
 		sourceMsg, err := fetchComposeSourceMessage(runtime, mailboxID, messageId)
@@ -218,7 +223,7 @@ var MailForward = common.Shortcut{
 			hintSendDraft(runtime, mailboxID, draftID)
 			return nil
 		}
-		resData, err := draftpkg.Send(runtime, mailboxID, draftID)
+		resData, err := draftpkg.Send(runtime, mailboxID, draftID, sendTime)
 		if err != nil {
 			return fmt.Errorf("failed to send forward (draft %s created but not sent): %w", draftID, err)
 		}

shortcuts/mail/mail_reply.go

@@ -32,6 +32,7 @@ var MailReply = common.Shortcut{
 		{Name: "attach", Desc: "Attachment file path(s), comma-separated (relative path only)"},
 		{Name: "inline", Desc: "Inline images as a JSON array. Each entry: {\"cid\":\"<unique-id>\",\"file_path\":\"<relative-path>\"}. All file_path values must be relative paths. Cannot be used with --plain-text. CID images are embedded via <img src=\"cid:...\"> in the HTML body. CID is a unique identifier, e.g. a random hex string like \"a1b2c3d4e5f6a7b8c9d0\"."},
 		{Name: "confirm-send", Type: "bool", Desc: "Send the reply immediately instead of saving as draft. Only use after the user has explicitly confirmed recipients and content."},
+		{Name: "send-time", Desc: "Scheduled send time as a Unix timestamp in seconds. Must be at least 5 minutes in the future. Use with --confirm-send to schedule the email."},
 	},
 	DryRun: func(ctx context.Context, runtime *common.RuntimeContext) *common.DryRunAPI {
 		messageId := runtime.Str("message-id")
@@ -56,6 +57,9 @@ var MailReply = common.Shortcut{
 		if err := validateConfirmSendScope(runtime); err != nil {
 			return err
 		}
+		if err := validateSendTime(runtime); err != nil {
+			return err
+		}
 		return validateComposeInlineAndAttachments(runtime.FileIO(), runtime.Str("attach"), runtime.Str("inline"), runtime.Bool("plain-text"), "")
 	},
 	Execute: func(ctx context.Context, runtime *common.RuntimeContext) error {
@@ -68,6 +72,7 @@ var MailReply = common.Shortcut{
 		attachFlag := runtime.Str("attach")
 		inlineFlag := runtime.Str("inline")
 		confirmSend := runtime.Bool("confirm-send")
+		sendTime := runtime.Str("send-time")
 
 		inlineSpecs, err := parseInlineSpecs(inlineFlag)
 		if err != nil {
@@ -181,7 +186,7 @@ var MailReply = common.Shortcut{
 			hintSendDraft(runtime, mailboxID, draftID)
 			return nil
 		}
-		resData, err := draftpkg.Send(runtime, mailboxID, draftID)
+		resData, err := draftpkg.Send(runtime, mailboxID, draftID, sendTime)
 		if err != nil {
 			return fmt.Errorf("failed to send reply (draft %s created but not sent): %w", draftID, err)
 		}

shortcuts/mail/mail_reply_all.go

@@ -33,6 +33,7 @@ var MailReplyAll = common.Shortcut{
 		{Name: "attach", Desc: "Attachment file path(s), comma-separated (relative path only)"},
 		{Name: "inline", Desc: "Inline images as a JSON array. Each entry: {\"cid\":\"<unique-id>\",\"file_path\":\"<relative-path>\"}. All file_path values must be relative paths. Cannot be used with --plain-text. CID images are embedded via <img src=\"cid:...\"> in the HTML body. CID is a unique identifier, e.g. a random hex string like \"a1b2c3d4e5f6a7b8c9d0\"."},
 		{Name: "confirm-send", Type: "bool", Desc: "Send the reply immediately instead of saving as draft. Only use after the user has explicitly confirmed recipients and content."},
+		{Name: "send-time", Desc: "Scheduled send time as a Unix timestamp in seconds. Must be at least 5 minutes in the future. Use with --confirm-send to schedule the email."},
 	},
 	DryRun: func(ctx context.Context, runtime *common.RuntimeContext) *common.DryRunAPI {
 		messageId := runtime.Str("message-id")
@@ -57,6 +58,9 @@ var MailReplyAll = common.Shortcut{
 		if err := validateConfirmSendScope(runtime); err != nil {
 			return err
 		}
+		if err := validateSendTime(runtime); err != nil {
+			return err
+		}
 		return validateComposeInlineAndAttachments(runtime.FileIO(), runtime.Str("attach"), runtime.Str("inline"), runtime.Bool("plain-text"), "")
 	},
 	Execute: func(ctx context.Context, runtime *common.RuntimeContext) error {
@@ -70,6 +74,7 @@ var MailReplyAll = common.Shortcut{
 		attachFlag := runtime.Str("attach")
 		inlineFlag := runtime.Str("inline")
 		confirmSend := runtime.Bool("confirm-send")
+		sendTime := runtime.Str("send-time")
 
 		inlineSpecs, err := parseInlineSpecs(inlineFlag)
 		if err != nil {
@@ -195,7 +200,7 @@ var MailReplyAll = common.Shortcut{
 			hintSendDraft(runtime, mailboxID, draftID)
 			return nil
 		}
-		resData, err := draftpkg.Send(runtime, mailboxID, draftID)
+		resData, err := draftpkg.Send(runtime, mailboxID, draftID, sendTime)
 		if err != nil {
 			return fmt.Errorf("failed to send reply-all (draft %s created but not sent): %w", draftID, err)
 		}

shortcuts/mail/mail_send.go

@@ -32,6 +32,7 @@ var MailSend = common.Shortcut{
 		{Name: "attach", Desc: "Attachment file path(s), comma-separated (relative path only)"},
 		{Name: "inline", Desc: "Inline images as a JSON array. Each entry: {\"cid\":\"<unique-id>\",\"file_path\":\"<relative-path>\"}. All file_path values must be relative paths. Cannot be used with --plain-text. CID images are embedded via <img src=\"cid:...\"> in the HTML body. CID is a unique identifier, e.g. a random hex string like \"a1b2c3d4e5f6a7b8c9d0\"."},
 		{Name: "confirm-send", Type: "bool", Desc: "Send the email immediately instead of saving as draft. Only use after the user has explicitly confirmed recipients and content."},
+		{Name: "send-time", Desc: "Scheduled send time as a Unix timestamp in seconds. Must be at least 5 minutes in the future. Use with --confirm-send to schedule the email."},
 	},
 	DryRun: func(ctx context.Context, runtime *common.RuntimeContext) *common.DryRunAPI {
 		to := runtime.Str("to")
@@ -62,6 +63,9 @@ var MailSend = common.Shortcut{
 		if err := validateComposeHasAtLeastOneRecipient(runtime.Str("to"), runtime.Str("cc"), runtime.Str("bcc")); err != nil {
 			return err
 		}
+		if err := validateSendTime(runtime); err != nil {
+			return err
+		}
 		return validateComposeInlineAndAttachments(runtime.FileIO(), runtime.Str("attach"), runtime.Str("inline"), runtime.Bool("plain-text"), runtime.Str("body"))
 	},
 	Execute: func(ctx context.Context, runtime *common.RuntimeContext) error {
@@ -74,6 +78,7 @@ var MailSend = common.Shortcut{
 		attachFlag := runtime.Str("attach")
 		inlineFlag := runtime.Str("inline")
 		confirmSend := runtime.Bool("confirm-send")
+		sendTime := runtime.Str("send-time")
 
 		senderEmail := resolveComposeSenderEmail(runtime)
 
@@ -145,7 +150,7 @@ var MailSend = common.Shortcut{
 			hintSendDraft(runtime, mailboxID, draftID)
 			return nil
 		}
-		resData, err := draftpkg.Send(runtime, mailboxID, draftID)
+		resData, err := draftpkg.Send(runtime, mailboxID, draftID, sendTime)
 		if err != nil {
 			return fmt.Errorf("failed to send email (draft %s created but not sent): %w", draftID, err)
 		}

skill-template/domains/mail.md

@@ -42,7 +42,7 @@
 4. **回复** — `+reply` / `+reply-all`（默认存草稿，加 `--confirm-send` 则立即发送）
 5. **转发** — `+forward`（默认存草稿，加 `--confirm-send` 则立即发送）
 6. **新邮件** — `+send` 存草稿（默认），加 `--confirm-send` 发送
-7. **确认投递** — 发送后用 `send_status` 查询投递状态，向用户报告结果
+7. **确认投递** — 立即发送后用 `send_status` 查询投递状态，定时发送后在预定时间后再查询；取消定时发送用 `cancel_scheduled_send`
 8. **编辑草稿** — `+draft-edit` 修改已有草稿。正文编辑通过 `--patch-file`：回复/转发草稿用 `set_reply_body` op 保留引用区，普通草稿用 `set_body` op
 
 ### CRITICAL — 首次使用任何命令前先查 `-h`
@@ -62,15 +62,17 @@ lark-cli mail user_mailbox.messages -h
 
 ### 命令选择：先判断邮件类型，再决定草稿还是发送
 
-| 邮件类型 | 存草稿（不发送） | 直接发送 |
-|----------|-----------------|---------|
-| **新邮件** | `+send` 或 `+draft-create` | `+send --confirm-send` |
-| **回复** | `+reply` 或 `+reply-all` | `+reply --confirm-send` 或 `+reply-all --confirm-send` |
-| **转发** | `+forward` | `+forward --confirm-send` |
+| 邮件类型 | 存草稿（不发送） | 直接发送 | 定时发送 |
+|----------|-----------------|---------|----------|
+| **新邮件** | `+send` 或 `+draft-create` | `+send --confirm-send` | `+send --confirm-send --send-time <unix_timestamp>` |
+| **回复** | `+reply` 或 `+reply-all` | `+reply --confirm-send` 或 `+reply-all --confirm-send` | `+reply --confirm-send --send-time <unix_timestamp>` 或 `+reply-all --confirm-send --send-time <unix_timestamp>` |
+| **转发** | `+forward` | `+forward --confirm-send` | `+forward --confirm-send --send-time <unix_timestamp>` |
 
 - 有原邮件上下文 → 用 `+reply` / `+reply-all` / `+forward`（默认即草稿），**不要用 `+draft-create`**
 - **发送前必须向用户确认收件人和内容，用户明确同意后才可加 `--confirm-send`**
-- **发送后必须调用 `send_status` 确认投递状态**（详见下方说明）
+- **立即发送后必须调用 `send_status` 确认投递状态**；定时发送（`--send-time`）在预定发送时间后再查询，取消定时发送用 `cancel_scheduled_send`（详见下方说明）
+
+> **定时发送注意事项**：`--send-time` 必须与 `--confirm-send` 配合使用，不能单独使用。`send_time` 为 Unix 时间戳（秒），需至少为当前时间 + 5 分钟。
 
 ### 使用公共邮箱或别名（send_as）发信
 
@@ -109,14 +111,22 @@ lark-cli mail +send --mailbox me --from alias@example.com \
 
 ### 发送后确认投递状态
 
-邮件发送成功后（收到 `message_id`），**必须**调用 `send_status` API 查询投递状态并向用户报告：
+**立即发送（无 `--send-time`）**：邮件发送成功后（收到 `message_id`），**必须**调用 `send_status` API 查询投递状态并向用户报告：
 
 ```bash
 lark-cli mail user_mailbox.messages send_status --params '{"user_mailbox_id":"me","message_id":"<发送返回的 message_id>"}'
 ```
 
 返回每个收件人的投递状态（`status`）：1=正在投递, 2=投递失败重试, 3=退信, 4=投递成功, 5=待审批, 6=审批拒绝。向用户简要报告结果，如有异常状态（退信/审批拒绝）需重点提示。
 
+**定时发送（指定了 `--send-time`）**：定时发送不会立即产生 `message_id`，`send_status` 在定时发送成功后会返回"待发送"状态，**不建议在定时发送后立即查询**。可在预定发送时间后再查询。如需取消定时发送：
+
+```bash
+lark-cli mail user_mailbox.drafts cancel_scheduled_send --params '{"user_mailbox_id":"me","draft_id":"<draft_id>"}'
+```
+
+**取消后邮件会变回草稿**，可继续编辑或在之后重新发送。
+
 ### 撤回邮件
 
 发送成功后，若响应中包含 `recall_available: true`，说明该邮件支持撤回（24 小时内已投递的邮件）。

skills/lark-mail/SKILL.md

@@ -56,7 +56,7 @@ metadata:
 4. **回复** — `+reply` / `+reply-all`（默认存草稿，加 `--confirm-send` 则立即发送）
 5. **转发** — `+forward`（默认存草稿，加 `--confirm-send` 则立即发送）
 6. **新邮件** — `+send` 存草稿（默认），加 `--confirm-send` 发送
-7. **确认投递** — 发送后用 `send_status` 查询投递状态，向用户报告结果
+7. **确认投递** — 立即发送后用 `send_status` 查询投递状态，定时发送后在预定时间后再查询；取消定时发送用 `cancel_scheduled_send`
 8. **编辑草稿** — `+draft-edit` 修改已有草稿。正文编辑通过 `--patch-file`：回复/转发草稿用 `set_reply_body` op 保留引用区，普通草稿用 `set_body` op
 
 ### CRITICAL — 首次使用任何命令前先查 `-h`
@@ -76,15 +76,17 @@ lark-cli mail user_mailbox.messages -h
 
 ### 命令选择：先判断邮件类型，再决定草稿还是发送
 
-| 邮件类型 | 存草稿（不发送） | 直接发送 |
-|----------|-----------------|---------|
-| **新邮件** | `+send` 或 `+draft-create` | `+send --confirm-send` |
-| **回复** | `+reply` 或 `+reply-all` | `+reply --confirm-send` 或 `+reply-all --confirm-send` |
-| **转发** | `+forward` | `+forward --confirm-send` |
+| 邮件类型 | 存草稿（不发送） | 直接发送 | 定时发送 |
+|----------|-----------------|---------|----------|
+| **新邮件** | `+send` 或 `+draft-create` | `+send --confirm-send` | `+send --confirm-send --send-time <unix_timestamp>` |
+| **回复** | `+reply` 或 `+reply-all` | `+reply --confirm-send` 或 `+reply-all --confirm-send` | `+reply --confirm-send --send-time <unix_timestamp>` 或 `+reply-all --confirm-send --send-time <unix_timestamp>` |
+| **转发** | `+forward` | `+forward --confirm-send` | `+forward --confirm-send --send-time <unix_timestamp>` |
 
 - 有原邮件上下文 → 用 `+reply` / `+reply-all` / `+forward`（默认即草稿），**不要用 `+draft-create`**
 - **发送前必须向用户确认收件人和内容，用户明确同意后才可加 `--confirm-send`**
-- **发送后必须调用 `send_status` 确认投递状态**（详见下方说明）
+- **立即发送后必须调用 `send_status` 确认投递状态**；定时发送（`--send-time`）在预定发送时间后再查询，取消定时发送用 `cancel_scheduled_send`（详见下方说明）
+
+> **定时发送注意事项**：`--send-time` 必须与 `--confirm-send` 配合使用，不能单独使用。`send_time` 为 Unix 时间戳（秒），需至少为当前时间 + 5 分钟。
 
 ### 使用公共邮箱或别名（send_as）发信
 
@@ -123,14 +125,22 @@ lark-cli mail +send --mailbox me --from alias@example.com \
 
 ### 发送后确认投递状态
 
-邮件发送成功后（收到 `message_id`），**必须**调用 `send_status` API 查询投递状态并向用户报告：
+**立即发送（无 `--send-time`）**：邮件发送成功后（收到 `message_id`），**必须**调用 `send_status` API 查询投递状态并向用户报告：
 
 ```bash
 lark-cli mail user_mailbox.messages send_status --params '{"user_mailbox_id":"me","message_id":"<发送返回的 message_id>"}'
 ```
 
 返回每个收件人的投递状态（`status`）：1=正在投递, 2=投递失败重试, 3=退信, 4=投递成功, 5=待审批, 6=审批拒绝。向用户简要报告结果，如有异常状态（退信/审批拒绝）需重点提示。
 
+**定时发送（指定了 `--send-time`）**：定时发送不会立即产生 `message_id`，`send_status` 在定时发送成功后会返回"待发送"状态，**不建议在定时发送后立即查询**。可在预定发送时间后再查询。如需取消定时发送：
+
+```bash
+lark-cli mail user_mailbox.drafts cancel_scheduled_send --params '{"user_mailbox_id":"me","draft_id":"<draft_id>"}'
+```
+
+**取消后邮件会变回草稿**，可继续编辑或在之后重新发送。
+
 ### 撤回邮件
 
 发送成功后，若响应中包含 `recall_available: true`，说明该邮件支持撤回（24 小时内已投递的邮件）。
@@ -292,6 +302,7 @@ lark-cli mail <resource> <method> [flags] # 调用 API
 
 ### user_mailbox.drafts
 
+  - `cancel_scheduled_send` — 取消定时发送
   - `create` — 创建草稿
   - `delete` — 删除指定邮箱账户下的单份邮件草稿。注意：对于草稿状态的邮件，只能使用本接口删除，禁止使用 trash_message；被删除的草稿数据无法恢复，请谨慎使用。
   - `get` — 获取草稿详情
@@ -376,6 +387,7 @@ lark-cli mail <resource> <method> [flags] # 调用 API
 | `user_mailboxes.accessible_mailboxes` | `mail:user_mailbox:readonly` |
 | `user_mailboxes.profile` | `mail:user_mailbox:readonly` |
 | `user_mailboxes.search` | `mail:user_mailbox.message:readonly` |
+| `user_mailbox.drafts.cancel_scheduled_send` | `mail:user_mailbox.message:send` |
 | `user_mailbox.drafts.create` | `mail:user_mailbox.message:modify` |
 | `user_mailbox.drafts.delete` | `mail:user_mailbox.message:modify` |
 | `user_mailbox.drafts.get` | `mail:user_mailbox.message:readonly` |