Fact Check Skill

A portable Agent Skill for discrete, checkable claims. It searches the claim, pulls primary source text with you-contents where useful, compares supporting and contradicting evidence, and returns a calibrated confidence read with citations through the standard You.com MCP server.

What You’ll Build

A SKILL.md package that turns a discrete claim into an evidence table. The skill searches the claim with you-search, pulls primary sources with you-contents where useful, separates supporting and contradicting evidence, and returns calibrated confidence instead of an unsupported verdict.

When It Fires

There is a discrete, checkable claim on the table.

Prerequisites

Install the Skill

1. Connect your agent harness to the You.com MCP server — see the MCP server guide.
2. Save the skill below as SKILL.md in your harness’s skills directory (or download it).
3. The agent invokes you-search and you-contents whenever the trigger fires.

The Skill

1
---
2
name: fact-check
3
description: Use when the user wants a specific claim verified - "is it true that X", "fact-check this", "does Y hold up". Returns evidence and a confidence read, not a verdict asserted from memory.
4
---
5
6
# Fact-check (You.com)
7
8
## When this fires
9
There is a discrete, checkable claim on the table.
10
11
## How to retrieve
12
1. Search the claim with `you-search`; pull primary sources with `you-contents`.
13
2. Line up supporting and contradicting evidence side by side.
14
3. Return the claim, what the evidence shows, a calibrated confidence, and the
15
   sources. Never assert a verdict the sources don't support.

Example Output

1
# Fact check
2
3
## Claim
4
The company opened its API to all developers this quarter.
5
6
## Evidence
7
Supports:
8
- The public changelog announced general API availability on May 12.
9
10
Complicates:
11
- Two enterprise-only endpoints remain behind account approval.
12
13
## Confidence
14
High for general API availability. Medium for the stronger claim that every API
15
surface is open to all developers.
16
17
Sources:
18
[1] Public changelog
19
[2] Developer docs

Next Steps