Deepagents Skills

deepagents-skills (JavaScript/TypeScript)

概述

技能通过渐进式披露提供专门功能：agent 仅在相关时加载内容。

流程： 匹配（查看描述）→ 读取（加载 SKILL.md）→ 执行（遵循指令）

技能 vs 内存

使用技能

使用 FilesystemBackend

import { createDeepAgent, FilesystemBackend } from "deepagents";
import { MemorySaver } from "@langchain/langgraph";

const agent = await createDeepAgent({
  backend: new FilesystemBackend({ rootDir: ".", virtualMode: true }),
  skills: ["./skills/"],
  checkpointer: new MemorySaver()
});

const result = await agent.invoke({
  messages: [{
    role: "user",
    content: "什么是 LangGraph？如果可用，使用 langgraph-docs 技能。"
  }]
});

使用 StoreBackend

import { createDeepAgent, StoreBackend, type FileData } from "deepagents";
import { InMemoryStore } from "@langchain/langgraph";

const store = new InMemoryStore();

function createFileData(content: string): FileData {
  const now = new Date().toISOString();
  return {
    content: content.split("\n"),
    created_at: now,
    modified_at: now,
  };
}

const skillUrl = "https://raw.githubusercontent.com/.../SKILL.md";
const response = await fetch(skillUrl);
const skillContent = await response.text();

await store.put(
  ["filesystem"],
  "/skills/langgraph-docs/SKILL.md",
  createFileData(skillContent)
);

const agent = await createDeepAgent({
  backend: (config) => new StoreBackend(config),
  store,
  skills: ["/skills/"]
});

使用 StateBackend

import { createDeepAgent, type FileData } from "deepagents";
import { MemorySaver } from "@langchain/langgraph";

function createFileData(content: string): FileData {
  const now = new Date().toISOString();
  return { content: content.split("\n"), created_at: now, modified_at: now };
}

const skillContent = `---
name: python-testing
description: Pytest 最佳实践
---
# Python 测试技能
...`;

const skillsFiles: Record<string, FileData> = {
  "/skills/python-testing/SKILL.md": createFileData(skillContent)
};

const agent = await createDeepAgent({
  skills: ["/skills/"],
  checkpointer: new MemorySaver()
});

await agent.invoke({
  messages: [{ role: "user", content: "我应该如何编写测试？" }],
  files: skillsFiles
});

SKILL.md 格式

---
name: fastapi-docs
description: FastAPI 最佳实践和模式
---

# FastAPI 文档技能

## 何时使用
使用 FastAPI 端点时。

## 指令
始终使用异步处理程序：
\`\`\`typescript
app.get("/users/:id", async (req, res) => {
  const user = await db.users.findById(req.params.id);
  res.json(user);
});
\`\`\`

注意事项

1. 技能需要后端

// ❌ 无后端
await createDeepAgent({ skills: ["./skills/"] });

// ✅ 提供后端
await createDeepAgent({
  backend: new FilesystemBackend({ rootDir: ".", virtualMode: true }),
  skills: ["./skills/"]
});

2. 需要 Frontmatter

# ❌ 缺少
# 我的技能

# ✅ 包含
---
name: my-skill
description: 这做什么
---
# 我的技能

3. 具体描述

# ❌ 模糊
description: 有用的技能

# ✅ 具体
description: 使用 Jest 和模拟模式的 TypeScript 测试

完整文档

• 技能指南
• Agent Skills 协议

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