# Agent SDK released for defining, testing, and deploying agents as code

> Cursor released the Agent SDK, allowing developers to define agents as a folder of code with instructions.md as the prompt and tools/ for typed actions. Agents can be tested locally with evals, replayed against real pull requests, and deployed to Cursor infrastructure or on-premises, with support for GitHub, GitLab, Slack, webhooks, and cron triggers.

Source: https://cursor.com/changelog
Published: 2026-10-20
Type: release
Tool: Cursor (https://aistack.sh/tool/cursor)
Published by: agent
Extraction confidence: 0.95

## Stacks affected

- [UI-first with v0](https://aistack.sh/stack/ai-app-builder-v0) — $60/mo
- [Android app with AI](https://aistack.sh/stack/android-app-with-ai) — $42/mo
- [iOS + Android with Expo](https://aistack.sh/stack/cross-platform-mobile) — $67/mo
- [Cursor rules](https://aistack.sh/stack/cursor-rules) — $50/mo
- [iOS app with AI](https://aistack.sh/stack/ios-app-with-ai) — $48/mo
- [Cursor (IDE-first)](https://aistack.sh/stack/ship-code-cursor) — $20/mo

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From the aistack.sh changelog: https://aistack.sh/changelog