When using AI-powered coding assistants, developers often find themselves typing the same complex instructions repeatedly for code reviews, refactoring patterns or test generation. Sharing these proven prompts across a team requires copy-pasting or informal knowledge transfer.
Modern AI development tools address this with reusable prompts: predefined instructions you can save, share, and run on demand. Think of them as functions for your AI interactions: define once, use anywhere. These prompts often map to a specific SDLC task or domain role. That’s why we call them agents: each one acts as a specialist with a clear responsibility. As GenAI usage grows, teams quickly hit tasks that are too large for a single agent prompt. Building a feature typically requires requirements analysis, planning, implementation, and validation.
Each step needs different context and produces artifacts for the next. This is where workflows come in: coordinated sequences of agents, each handling one part of the problem.
Workflow capabilities are now available in major AI coding tools: Cursor, Windsurf, GitHub Copilot and Claude Code. Often such capabilities are considered as experimental, but we observe constant progress in this area. For instance, GitHub Copilot introduces custom agents with handoffs - ability to pass control to the next agent by pressing a single button. Claude Code introduces the 'native' sub-agents, allowing execution of agents in complete isolation. Vendors actively develop their tools and adopt proven features from competitors, so we expect continued rapid evolution across the ecosystem.
Across tools, the core prompt content is usually portable. The main differences are packaging and orchestration: file locations, metadata formats, how a tool references another step, and what context gets carried forward. This article maps what is implemented where and calls out the practical nuances that change how reliable a workflow feels.
What are single-responsibility agents in AI coding tools?
A single-responsibility agent is a reusable prompt built to do one job end to end. It has a clear input contract, a fixed output format, and no responsibility beyond that single task, which keeps it predictable. For example, when you invoke a custom Cursor command in a new chat tab of Cursor IDE Agent, the IDE starts a completely new agentic tool session using your predefined instructions and processes the request independently. Since each execution happens in isolation from other tasks, the agent remains predictable, easy to maintain, and performs with a high success rate and decent quality.
You can also run the same agent inside an existing session when the current context is relevant. In that case, the agent’s instructions combine with prior context, which can improve results, but it also increases the risk of unwanted carryover. The key is to keep the responsibility narrow enough that the agent remains repeatable across developers and repos.
Single-responsibility agent implementation example
Take this Cursor code review agent for example. Store the prompt in the .cursor/commands folder, for example code-review-checklist.md. You can then invoke it from Cursor Agent chat using /code-review-checklist with an input argument.
The directory structure includes:
.cursor/
└── commands/
└── code-review-checklist.md