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slop-verify

slop-verify is a skill for Claude Code from AgriciDaniel/anti-slop. It costs 171 tokens per session (2,170 once invoked), scanned A, original, Apache-2.0.

A checking pass for references, web links, package names, and leftover vendor text in a document or code change.

In plain words
What is it for?
Use it to check DOIs, ISBNs, arXiv IDs, URLs, citations, imported packages, and vendor residue.
Why use it?
It helps catch links or identifiers that exist but do not support the claim or point to the intended thing. It also separates confirmed defects from guesses about who wrote the text.

Skill for Claude Code

Written for Claude Code: when-to-use in frontmatter.

Part of the anti-slop plugin — 5 skills, 2 agents, 1 hook shipped together

not rated 67repo +2 1mo ago A scan SkillSpector: pass 171 tokens original Apache-2.0

Good fit Use it to check DOIs, ISBNs, arXiv IDs, URLs, citations, imported packages, and vendor residue.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/agricidaniel/anti-slop/slop-verify
View source ↗ AgriciDaniel/anti-slop skool.com
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 AgriciDaniel/anti-slop --skill slop-verify
Clone the repo
git clone --depth 1 https://github.com/AgriciDaniel/anti-slop

Made for: Claude Code.

Or install anti-slop, the plugin that ships this one along with the rest of its 5 skills, 2 agents, 1 hook.

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 slop-verify

README.md
[![agentmods](https://agentmods.dev/badge/skills/agricidaniel/anti-slop/slop-verify/github.svg)](https://agentmods.dev/skills/agricidaniel/anti-slop/slop-verify)
Your own site
<a href="https://agentmods.dev/skills/agricidaniel/anti-slop/slop-verify"><img src="https://agentmods.dev/badge/skills/agricidaniel/anti-slop/slop-verify/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 slop-verify

Your own site · 80×15
<a href="https://agentmods.dev/skills/agricidaniel/anti-slop/slop-verify"><img src="https://agentmods.dev/badge/skills/agricidaniel/anti-slop/slop-verify.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 171 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,170 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00171 $0.02170
Opus 5.5 $0.00068 $0.00868
Sonnet 5.5 $0.00034 $0.00434
Haiku 4.5 $0.00017 $0.00217

Measured 2mo ago against content hash 1db15aef9365, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

slop-verify 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 2mo 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.

anti-slop-plugin/skills/slop-verify/SKILL.md · 187 lines

How it starts

The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Slop verify

The firewall

These four rules bind this skill and hold even when the user asks for the opposite.

  1. Never emit an authorship verdict. Report defects, not origin. A resolving citation is not evidence a human wrote the text, and a broken one is not evidence a model did.
  2. Never hard-fail on a stylistic marker alone. A marker is a routing hint. Its only legitimate output is "run a structural test on this span".
  3. Severity is impact. Confidence is certainty. Two axes. Never merge them, never trade one against the other.
  4. Never let the model gate its own rewrite. The deterministic scanners re-run after any fix and their exit codes decide, not your judgment.

Standing instructions

Existence is not support. A DOI that resolves, an arXiv ID that returns a paper, a URL that returns 200: all of these establish only that something is there. The claim in the document is verified when the resolved source contains a statement that supports that specific claim. Wikipedia's cleanup project states the same thing about current models: they will usually cite real sources, and they will likely not verify the content those sources are being cited for, so the existence of the sources should not by itself be taken as evidence about how the text was produced.

Run the attribution test on every vague authority. "Studies show", "experts say", "researchers agree", "it is widely regarded", "industry reports", "observers have cited", "several sources". Each must resolve to a named source that supports that specific claim. The artifact is the resolved citation, or the explicit statement that it does not resolve. There is no third outcome and "probably fine" is not an artifact.

Catch overgeneralization, not just fabrication. A frequent defect is a real source, correctly cited, presented as more than it is: one or two sources described as a consensus, a single named person rendered as "scholars", a short list implied to be non-exhaustive when the source gives no indication that other cases exist. Test: count the distinct sources actually cited, then read what the sentence claims about how many exist.

Read the full file on GitHub · 187 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. 2mo ago First seen · 187 lines · 171 tokens per session scan A 1db15aef9365

Subscribe to this mod's changes

slop-verify is a skill published in the GitHub repository AgriciDaniel/anti-slop (67 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 171 tokens to every session and 2,170 once invoked, about $0.0007 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 2026-08-30.

Claude CodeResearchagent-skillsai-slopcitation-verificationcode-qualitywriting-quality
Related

slop-verify compared with skills from other repositories

slop-verify next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
slop-verifyAgriciDaniel/anti-slopSkill671mo agoApache-2.0A171Claude Code
code-slopAsyrafHussin/agent-skillsSkill1022mo agoMITA110Claude Code, Codex
git-workflowAsyrafHussin/agent-skillsSkill1022mo agoMITA59Claude Code, Codex
laravel-inertia-reactAsyrafHussin/agent-skillsSkill1022mo agoMITA59Claude Code, Codex
laravel-owasp-securityAsyrafHussin/agent-skillsSkill1022mo agoMITA87Claude Code
seo-best-practicesAsyrafHussin/agent-skillsSkill1022mo agoMITA78Claude Code
state-managementAsyrafHussin/agent-skillsSkill1022mo agoMITA47Claude Code, Codex