fact-checking

fact-checking is a skill for Claude Code, Codex from rohitgehe05/mindpowers. It costs 113 tokens per session (1,590 once invoked), scanned A, original, MIT.

A final review process for checking factual claims in a document against supplied sources and identifying sensitive information before publication.

In plain words
What is it for?
It helps verify claims, quote the relevant source, flag unresolved issues, and identify personal, customer, confidential, or unannounced information.
Why use it?
It helps catch unsupported numbers, dates, names, quotes, and potentially harmful disclosures before a document is sent.

Skill for Claude CodeCodex

Part of the mindpowers plugin — 6 skills shipped together

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.

agentmods
npx agentmods add skills/rohitgehe05/mindpowers/fact-checking
Any agent
npx skills add rohitgehe05/mindpowers --skill fact-checking
Clone the repo
git clone --depth 1 https://github.com/rohitgehe05/mindpowers

Made for: Claude Code, Codex.

Or install mindpowers, the plugin that ships this one along with the rest of its 6 skills.

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 fact-checking

README.md
[![agentmods](https://agentmods.dev/badge/skills/rohitgehe05/mindpowers/fact-checking.svg)](https://agentmods.dev/skills/rohitgehe05/mindpowers/fact-checking)
Your own site
<a href="https://agentmods.dev/skills/rohitgehe05/mindpowers/fact-checking"><img src="https://agentmods.dev/badge/skills/rohitgehe05/mindpowers/fact-checking.svg" alt="Measured on agentmods" height="20"></a>
Per session 113 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,590 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00113 $0.01590
Opus 5 $0.00056 $0.00795
Sonnet 5 $0.00023 $0.00318
Haiku 4.5 $0.00011 $0.00159

Measured 4d ago against content hash e63b55af836a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fact-checking 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 4d 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.

skills/fact-checking/SKILL.md · 143 lines

How it starts

The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fact-Checking

Overview

The last pass before a doc ships. Two jobs: (1) verify every checkable claim against the sources actually in scope, with verdicts that must quote their source; (2) flag content that could damage someone if shipped — named people, customer names, unannounced plans, confidential bleed, PII.

This is the "fact-check" step of the mindpowers loop (validate → shape → draft → review → fact-check → remember). It runs on demand and is recommended — never forced — by drafting and reviewing-docs at handoff. The gate is honest reporting, not blocking: the doc always comes back to the user, with the unresolved list on top. Track the steps below as todos if your harness has a task list.

Step 1: Extract claims

Read the doc and extract every checkable claim: numbers, dates, named people and organizations, quotes, "data shows X" statements, superlatives ("first", "only", "biggest"). Each claim gets a stable ID at first sighting: C-001, C-002, …, scoped to the doc and never renumbered.

Before assigning IDs, check docs/mindpowers/reviews/ for a prior review or fact-check of this doc (same filename stem). If a claims ledger exists, existing claims keep their C-###, new claims continue the sequence, and this re-check updates verdicts under existing IDs.

Step 2: Classify

Classify each claim:

  • source-verifiable — a source inside scope could settle it. In scope: files or links the user supplied or pointed at, the locked spec, the problem brief. Nothing else.
  • external — it lives in someone's head, a dashboard, or a record not in scope. Structurally uncheckable here.
  • unverifiable — no source could settle it as stated (vague superlatives, unfalsifiable claims).

Honesty rule: when in doubt between source-verifiable and external, classify external. "Confirm this with the source" beats "looks right."

If a decision-critical claim is public (a market size, a public date, a public quote), offer web research as an option and wait for the user's yes. Never run it automatically.

Read the full file on GitHub · 143 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 4d ago First seen · 143 lines · 113 tokens per session scan A e63b55af836a

Subscribe to this mod's changes

fact-checking is a skill published in the GitHub repository rohitgehe05/mindpowers (5 stars, last pushed 27d ago), licensed MIT. It adds 113 tokens to every session and 1,590 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other skills, from other repositories

anti-ai-writing

Use when writing or editing any prose for a human reader - documentation, READMEs, emails, reports, captions, scripts, blog posts, UI copy, commit messages, PR descriptions - or when asked to remove AI tells, de-slop text, make writing sound human, or check writing style. Applies 29 researched patterns that make text…

Abdulkader-Safi/AI-Writing-Rules · 78 tokens

markifact-overview

Reference — what Markifact is, what the MCP server exposes, and the discover→inspect→run pattern. Always loaded into the performance-marketer agent.

markifact/markifact-mcp · 36 tokens

safe-write-operations

Reference — rules for safely executing write/destructive operations against ad accounts. Always loaded into the performance-marketer agent.

markifact/markifact-mcp · 28 tokens

anti-slop-writing

Make writing sound like a person wrote it. Rewrites drafts that read as machine-generated, restores voice that AI editing flattened, and audits text for AI tells when asked. Use when a draft feels generic or corporate, when asked to de-slop or humanize text, when polishing anything an LLM helped write, before…

Kaos599/professional-skills · 111 tokens

technical-content-writer

Write technical content that sounds like a specific human wrote it - LinkedIn posts, blog posts, threads, newsletters, essays about engineering and infrastructure subjects. Derives a voice signature from exemplars before drafting, forces mechanism and numbers over adjectives, and runs an anti-slop gate before output.…

Kaos599/professional-skills · 76 tokens

dev

Software development planning. Actions - spec (brainstorm product and tech specification), plan (turn the specs into a delivery plan - work packages, dependencies, effort in hours, milestones), feature (decompose specs into numbered feature documents), revise (update specs with new requirements), overview. Planning…

protonium-labs/axiomcore-plugin · 81 tokens