back-your-claims

back-your-claims is a skill for Claude Code, Codex from MK27MK/no-bs-skills. It costs 15 tokens per session (83 once invoked), scanned A, original, MIT.

A writing aid that requires claims to be supported by reliable, human-written sources.

In plain words
What is it for?
It is for writing research notes, technical explanations, and other content where readers need to check the evidence.
Why use it?
It reduces unsupported assertions by requiring a link or local file path immediately after each claim.

Skill for Claude CodeCodex

Written for Claude Code and Codex: disable-model-invocation in frontmatter, but also agents/openai.yaml present.

Part of the no-bs-skills plugin — 6 skills shipped together

Good fit It is for writing research notes, technical explanations, and other content where readers need to check the evidence.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mk27mk/no-bs-skills/back-your-claims
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 MK27MK/no-bs-skills --skill back-your-claims
Clone the repo
git clone --depth 1 https://github.com/MK27MK/no-bs-skills

Made for: Claude Code, Codex.

Or install no-bs-skills, 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 back-your-claims

README.md
[![agentmods](https://agentmods.dev/badge/skills/mk27mk/no-bs-skills/back-your-claims/github.svg)](https://agentmods.dev/skills/mk27mk/no-bs-skills/back-your-claims)
Your own site
<a href="https://agentmods.dev/skills/mk27mk/no-bs-skills/back-your-claims"><img src="https://agentmods.dev/badge/skills/mk27mk/no-bs-skills/back-your-claims/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 back-your-claims

Your own site · 80×15
<a href="https://agentmods.dev/skills/mk27mk/no-bs-skills/back-your-claims"><img src="https://agentmods.dev/badge/skills/mk27mk/no-bs-skills/back-your-claims.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 15 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 83 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 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 5.1 $0.00015 $0.00083
Opus 5.5 $0.00006 $0.00033
Sonnet 5.5 $0.00003 $0.00017
Haiku 4.5 $0.00002 $0.00008

Measured 1mo ago against content hash c8b7c50966c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

back-your-claims 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 1mo 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/back-your-claims/SKILL.md · 10 lines

What it actually says

  • Don't make assumptions.
  • Back any claim or statement you make with reliable human-written resources.
  • The resource must immediately follow the claim or statement, and it must be a link (if on the web) or a clickable path (if local) to the resource.
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. 1mo ago First seen · 10 lines · 15 tokens per session scan A c8b7c50966c3

Subscribe to this mod's changes

back-your-claims is a skill published in the GitHub repository MK27MK/no-bs-skills (15 stars, last pushed 1mo ago), licensed MIT. It adds 15 tokens to every session and 83 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-11.