# Anthropic Claude Agent SDK (TS) (@anthropic-ai/claude-agent-sdk) - AgentBreakWatch Reference

> TL;DR Verdict: Anthropic Claude Agent SDK (TS) (`@anthropic-ai/claude-agent-sdk`) is currently at v0.3.310 on NPM (published 2026-10-23), with a 90-day Stability Score of 65/100 (C+) and HIGH schema drift risk across 78 releases in the last 90 days. 0.3.x updates query() async generator message types, CanUseTool permission callback signatures, and mcpServers stdio/SSE config structure.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/anthropic-claude-agent-sdk
- Category Hub: https://agentbreakwatch.vercel.app/c/agent-sdks (AI Agent SDKs & Frameworks Breaking-Change Index)
- Package Name: `@anthropic-ai/claude-agent-sdk`
- Registry: NPM (https://www.npmjs.com/package/@anthropic-ai/claude-agent-sdk)
- GitHub Repository: https://github.com/anthropics/claude-agent-sdk-typescript
- Vendor: Anthropic
- Latest Live Version: v0.3.310
- Published Date: 2026-10-23T21:21:54.828Z
- 90-Day Release Count: 78
- Direct Dependencies: 0
- License: SEE LICENSE IN README.md
- Stability Score: 65/100 (Grade C+)
- Schema Drift Risk: HIGH
- Recommended Exact Pin Command: `npm install @anthropic-ai/claude-agent-sdk@0.3.310`
- Watched Symbols / MCP Tools: query, CanUseTool, McpServerConfig, SDKMessage
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
0.3.x updates query() async generator message types, CanUseTool permission callback signatures, and mcpServers stdio/SSE config structure.

## Migration Diff: Before (Deprecated / Unpinned Pattern)
```
for await (const msg of query({ prompt: "fix bug", options: { allowedTools: ["Bash"] } })) {
  console.log(msg);
}
```

## Migration Diff: After (Verified v0.3.310 Pattern)
```
for await (const msg of query({
  prompt: "fix bug",
  options: { permissionMode: "acceptEdits", allowedTools: ["Bash", "Edit"] }
})) {
  console.log(msg);
}
```

## Recent Verified Releases
- v0.3.310 (published 2026-10-23) [LATEST]
- v0.3.309 (published 2026-10-22)
- v0.3.308 (published 2026-10-22)
- v0.3.307 (published 2026-10-21)
- v0.3.306 (published 2026-10-21)
- v0.3.305 (published 2026-10-20)