---
title: "Create Custom Agent - Air Market"
description: "If you keep giving the same assistant the same long preamble, you can write that down as its own agent instead. This creates the VS Code agent file, with the tools it can use, the instructions it fol…"
canonical: "https://airmarket.ai/app/create-custom-agent"
---

[Air Market](/) / [Developer Tools](/category/devtools) / Create Custom Agent

Skill by [.NET Platform](/@dotnet)

# Create Custom Agent

Stand up a purpose-built assistant instead of re-explaining yourself

## What this does

If you keep giving the same assistant the same long preamble, you can write that down as its own agent instead. This creates the VS Code agent file, with the tools it can use, the instructions it follows, and how it hands off to another agent. Reach for it when you are setting up a specialized helper.

### Top 3 things it does for you

- Scaffold a new custom agent
- Give an agent its tools and instructions
- Set up handoffs between agents

## Information

**Create Custom Agent at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [.NET Platform](/@dotnet) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 7 KB |
| Licence | MIT |
| Repository | [dotnet/skills](https://github.com/dotnet/skills/tree/9433a31e677da42032f1512b6c632ea06211f883/.agents/skills/create-custom-agent) |
| GitHub stars | 5,236 (as of Nov 2026) |
| Installs | 4,059, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of Create Custom Agent and flagged nothing. AIR's verdict: **safe**.

**What Create Custom Agent's check was run against**

|  |  |
| --- | --- |
| Commit | 9433a31e677da42032f1512b6c632ea06211f883 |
| Content hash | 309323b5c64737918a123b3ab6997d44ef863f777e3929d9ff2ffbd95bbde6b6 |
| Files read | [Browse the files at this exact commit](https://github.com/dotnet/skills/blob/9433a31e677da42032f1512b6c632ea06211f883/.agents/skills/create-custom-agent/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for Create Custom Agent](/security/create-custom-agent)

## About Create Custom Agent

This creates VS Code custom agent files (`.agent.md`) for specialized AI personas, covering the tools they get, the instructions they follow, and their handoffs.

It fits scaffolding a new custom agent, configuring how an agent's workflow runs, and setting up agent-to-agent handoffs.

## What's inside

- SKILL.md - instructions

## Questions

### Is Create Custom Agent safe to install?

AIR scanned this exact version of Create Custom Agent and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit 9433a31e677d, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/create-custom-agent.

### How do I install Create Custom Agent?

Open https://airmarket.ai/app/create-custom-agent on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/dotnet/skills/tree/9433a31e677da42032f1512b6c632ea06211f883/.agents/skills/create-custom-agent. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by .NET Platform](/@dotnet)

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Canonical URL: <https://airmarket.ai/app/create-custom-agent>