aget-check-facts

aget-check-facts is a skill for Claude Code from aget-framework/template-advisor-aget. It costs 38 tokens per session (1,799 once invoked), scanned A, a copy of aget-check-facts, Apache-2.0.

A procedure for checking whether factual claims are supported by evidence in three stages: the data, the reasoning, and how the claim spreads to later records or decisions.

In plain words
What is it for?
It helps review recent statements, investigate a specific claim, and check whether evidence supports the conclusion and its wider use.
Why use it?
It reduces the risk that an unverified statement is repeated in conversations, documents, instructions, or work shared with other agents.

Skill for Claude Code

Written for Claude Code: $ARGUMENTS substitution. Also seen: mentions CLAUDE.md.

Good fit It helps review recent statements, investigate a specific claim, and check whether evidence supports the conclusion and its wider use.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/aget-framework/template-advisor-aget/aget-check-facts
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add aget-framework/template-advisor-aget --skill aget-check-facts
Clone the repo
git clone --depth 1 https://github.com/aget-framework/template-advisor-aget

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for aget-check-facts

README.md
[![agentmods](https://agentmods.dev/badge/skills/aget-framework/template-advisor-aget/aget-check-facts/github.svg)](https://agentmods.dev/skills/aget-framework/template-advisor-aget/aget-check-facts)
Your own site
<a href="https://agentmods.dev/skills/aget-framework/template-advisor-aget/aget-check-facts"><img src="https://agentmods.dev/badge/skills/aget-framework/template-advisor-aget/aget-check-facts/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for aget-check-facts

Your own site · 80×15
<a href="https://agentmods.dev/skills/aget-framework/template-advisor-aget/aget-check-facts"><img src="https://agentmods.dev/badge/skills/aget-framework/template-advisor-aget/aget-check-facts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,799 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00038 $0.01799
Opus 5 $0.00019 $0.00899
Sonnet 5 $0.00008 $0.00360
Haiku 4.5 $0.00004 $0.00180

Measured 11d ago against content hash 88e26e7f9023, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

aget-check-facts scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to aget-check-facts — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/aget-check-facts/SKILL.md · 153 lines

How it starts

The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/aget-check-facts

Verify factual claims using a stratified 3-pass protocol. Operationalizes the conversational assertion provenance gap (L803) as structured verification.

Purpose

V-tests gate artifacts and ground-truth checks gate handoffs, but nothing gates mid-conversation factual claims. Unverified assertions propagate through a chain: conversation -> session record -> L-doc -> CLAUDE.md -> fleet-wide behavior. Cross-fleet evidence (4+ agents across 2+ fleets) independently identified this as a structural deficiency.

Evidence: L803 (Conversational Assertion Provenance Gap), L801 (Cross-Fleet False Positive — asserted "12/17 L-doc citations are fabricated" without verifying it was checking the wrong L-space), L756 (AGCI Verification Protocol), L802 (Convergent Architecture across 4+ agents), L807 (Incident Density = Urgency, 3x in one session), L782/remote (Stratified 3-pass discovery). CCB INTEL-002 (21 documented incidents).

Input

$ARGUMENTS

Parameters:

Mode Trigger Scope
Self-check /aget-check-facts (no args) Review own recent assertions in conversation
Targeted /aget-check-facts [claim] Verify specific claim
Artifact /aget-check-facts --file [path] Verify claims in a session file or L-doc

Examples:

  • /aget-check-facts — Self-check recent conversation assertions
  • /aget-check-facts the fleet has 34 agents — Verify specific claim
  • /aget-check-facts --file sessions/SESSION_2026-04-10_1400.md — Verify claims in artifact
  • check facts — Natural language trigger
  • verify that — Alias for targeted check

Execution

Step 1: Identify Claims

Extract factual claims from the scope:

Scope Extraction Method
Self-check Scan own recent conversation messages for entity names, dates, counts, identifiers, and causal assertions
Targeted Parse the specific claim from $ARGUMENTS
Artifact Read file, extract assertions containing names, dates, counts, identifiers

Read the full file on GitHub · 153 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 153 lines · 38 tokens per session scan A 88e26e7f9023

Subscribe to this mod's changes

aget-check-facts is a skill published in the GitHub repository aget-framework/template-advisor-aget (2 stars, last pushed yesterday), licensed Apache-2.0. It adds 38 tokens to every session and 1,799 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to aget-check-facts, differing in 0 lines, and is treated as a copy.

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