Claude Agent SDK and MCP-Native Work

~30 min · claude-sdk, mcp, coding-agents

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A coding-agent harness as a platform

The Claude Agent SDK builds on the agent harness behind Claude Code. Its value is not just model access; it is the surrounding tool ecosystem: file operations, command execution, web search, MCP extensibility, permissions, session management, and monitoring.

That makes it attractive for codebase agents, SRE agents, review agents, and automation where tool permissions and session continuity matter.

Use it when the harness is the product

If your agent mostly needs to operate in a repo or developer environment, a harness with mature file, shell, MCP, and permission concepts can save a lot of glue code.

But provider-specific SDKs move. Always check current docs before teaching exact install commands or option names. This quest gives the architecture; SDK quests can pin exact current usage later.

Code

Claude Agent SDK shape·typescript

import { query } from "@anthropic-ai/claude-agent-sdk";

const stream = query({
  prompt: "Inspect this repo and summarize the test strategy.",
  options: {
    systemPrompt: "You are a careful codebase analysis agent.",
    maxTurns: 8,
  },
});

for await (const message of stream) {
  console.log(message);
}

External links

Claude Agent SDK overview

Exercise

Name one agent where the Claude Agent SDK harness would help more than a raw Messages API loop. Explain which harness features matter.

Hint

Think repo access, shell tools, MCP, permissions, and long-running sessions.

Progress

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