# Send Backend Developer to your agent
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
## Fast path
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
## Suggested prompts
### New install

```text
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
```
### Upgrade existing

```text
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
```
## Machine-readable fields
```json
{
  "schemaVersion": "1.0",
  "item": {
    "slug": "langchain-email-agent",
    "name": "Backend Developer",
    "source": "tencent",
    "type": "skill",
    "category": "开发工具",
    "sourceUrl": "https://clawhub.ai/JawadSadiq01/langchain-email-agent",
    "canonicalUrl": "https://clawhub.ai/JawadSadiq01/langchain-email-agent",
    "targetPlatform": "OpenClaw"
  },
  "install": {
    "downloadUrl": "/downloads/langchain-email-agent",
    "sourceDownloadUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=langchain-email-agent",
    "sourcePlatform": "tencent",
    "targetPlatform": "OpenClaw",
    "packageFormat": "ZIP package",
    "primaryDoc": "SKILL.md",
    "includedAssets": [
      "SKILL.md",
      "email.agent.ts"
    ],
    "downloadMode": "redirect",
    "sourceHealth": {
      "source": "tencent",
      "slug": "langchain-email-agent",
      "status": "healthy",
      "reason": "direct_download_ok",
      "recommendedAction": "download",
      "checkedAt": "2026-04-30T09:35:07.585Z",
      "expiresAt": "2026-05-07T09:35:07.585Z",
      "httpStatus": 200,
      "finalUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=langchain-email-agent",
      "contentType": "application/zip",
      "probeMethod": "head",
      "details": {
        "probeUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=langchain-email-agent",
        "contentDisposition": "attachment; filename=\"langchain-email-agent-1.0.0.zip\"",
        "redirectLocation": null,
        "bodySnippet": null,
        "slug": "langchain-email-agent"
      },
      "scope": "item",
      "summary": "Item download looks usable.",
      "detail": "Yavira can redirect you to the upstream package for this item.",
      "primaryActionLabel": "Download for OpenClaw",
      "primaryActionHref": "/downloads/langchain-email-agent"
    },
    "validation": {
      "installChecklist": [
        "Use the Yavira download entry.",
        "Review SKILL.md after the package is downloaded.",
        "Confirm the extracted package contains the expected setup assets."
      ],
      "postInstallChecks": [
        "Confirm the extracted package includes the expected docs or setup files.",
        "Validate the skill or prompts are available in your target agent workspace.",
        "Capture any manual follow-up steps the agent could not complete."
      ]
    }
  },
  "links": {
    "detailUrl": "https://openagent3.xyz/skills/langchain-email-agent",
    "downloadUrl": "https://openagent3.xyz/downloads/langchain-email-agent",
    "agentUrl": "https://openagent3.xyz/skills/langchain-email-agent/agent",
    "manifestUrl": "https://openagent3.xyz/skills/langchain-email-agent/agent.json",
    "briefUrl": "https://openagent3.xyz/skills/langchain-email-agent/agent.md"
  }
}
```
## Documentation

### Overview

The EmailAgent class provides an AI-powered email composition and sending capability using LangChain with OpenAI's GPT model. It includes human-in-the-loop middleware that requires approval before emails are sent.

### Environment Variables

VariableDefaultDescriptionOPENAI_MODELgpt-4o-miniOpenAI model to use

### Usage

import { EmailAgent } from './email.agent';
import { SendEmailDto } from '../dto/send-email.dto';

const agent = new EmailAgent();

const dto: SendEmailDto = {
  email: 'recipient@example.com',
  name: 'John Doe',
  subject: 'Meeting Request',      // optional
  body: 'Initial email content',   // optional
  instructions: 'Keep it formal'   // optional
};

const result = await agent.sendEmail(dto);

### Human-in-the-Loop Middleware

The agent uses humanInTheLoopMiddleware which interrupts execution on the EmailTool before sending emails. This allows for:

approve - Send the email as composed
edit - Modify the email before sending
reject - Cancel the email operation

The readEmailTool is excluded from interruption (false), allowing read operations to proceed without approval.

### Parameters

ParameterTypeRequiredDescriptionemailstringYesRecipient email addressnamestringYesRecipient namesubjectstringNoEmail subject linebodystringNoInitial email body contentinstructionsstringNoAI instructions for composing the email

### Return Value

Returns the final message content from the agent as a string.
## Trust
- Source: tencent
- Verification: Indexed source record
- Publisher: JawadSadiq01
- Version: 1.0.0
## Source health
- Status: healthy
- Item download looks usable.
- Yavira can redirect you to the upstream package for this item.
- Health scope: item
- Reason: direct_download_ok
- Checked at: 2026-04-30T09:35:07.585Z
- Expires at: 2026-05-07T09:35:07.585Z
- Recommended action: Download for OpenClaw
## Links
- [Detail page](https://openagent3.xyz/skills/langchain-email-agent)
- [Send to Agent page](https://openagent3.xyz/skills/langchain-email-agent/agent)
- [JSON manifest](https://openagent3.xyz/skills/langchain-email-agent/agent.json)
- [Markdown brief](https://openagent3.xyz/skills/langchain-email-agent/agent.md)
- [Download page](https://openagent3.xyz/downloads/langchain-email-agent)