---
title: "Doublecheck - Air Market"
description: "AI text often sounds right and is not. This pulls out the claims that can be checked, searches the web for things that support or contradict them, looks for the patterns that usually mean something w…"
canonical: "https://airmarket.ai/app/doublecheck"
---

[Air Market](/) / [Research](/category/research) / Doublecheck

Skill by [GitHub](/@github)

# Doublecheck

Find out which parts of an AI answer actually hold up

## What this does

AI text often sounds right and is not. This pulls out the claims that can be checked, searches the web for things that support or contradict them, looks for the patterns that usually mean something was made up, and hands you a report with links. Reach for it before you pass AI output on to someone else.

### Top 3 things it does for you

- Check the claims in an AI-written answer
- Find sources that back up or contradict what was written
- Get a report I can read through myself

## Information

**Doublecheck at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [GitHub](/@github) |
| Category | [Research](/category/research) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 18 KB |
| Licence | MIT |
| Repository | [github/awesome-copilot](https://github.com/github/awesome-copilot/tree/90921cc46f4e452ea379e70884d60ec25263f16a/skills/doublecheck) |
| GitHub stars | 38,187 (as of Nov 2026) |
| Installs | 4,323, counted by skills.sh (Nov 2026) |

## Security report

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

**What Doublecheck's check was run against**

|  |  |
| --- | --- |
| Commit | 90921cc46f4e452ea379e70884d60ec25263f16a |
| Content hash | 93958750c62245a10d8ec1846d7a8f34a978c6c74fd40f831b8e39e953d7eec7 |
| Files read | [Browse the files at this exact commit](https://github.com/github/awesome-copilot/blob/90921cc46f4e452ea379e70884d60ec25263f16a/skills/doublecheck/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 Doublecheck](/security/doublecheck)

## About Doublecheck

This runs AI output through three layers of checking. First it pulls out the claims that can actually be verified. Then it searches the web for sources that support or contradict them. Then it runs an adversarial review looking for the patterns typical of hallucination.

What comes out is a structured verification report with links to sources, meant to be read by a person rather than taken as a final answer.

## What's inside

- SKILL.md - instructions
- assets/verification-report-template.md - reference

## Questions

### Is Doublecheck safe to install?

AIR scanned this exact version of Doublecheck and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit 90921cc46f4e, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/doublecheck.

### How do I install Doublecheck?

Open https://airmarket.ai/app/doublecheck 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/github/awesome-copilot/tree/90921cc46f4e452ea379e70884d60ec25263f16a/skills/doublecheck. Install from that link, not the branch.

## Related on Air Market

- [More Research listings](/category/research)
- [Everything by GitHub](/@github)

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Canonical URL: <https://airmarket.ai/app/doublecheck>