check-originality

check-originality is a skill for Claude Code, Codex from ShaishavMaisuria/research-paper-lifecycle-skills. It costs 213 tokens per session (1,261 once invoked), scanned A, original, Apache-2.0.

A draft-review tool that looks for copied or heavily reused wording, including uncited near-quotes and text taken from the author's earlier work. It compares the draft with named or publicly searchable sources, not private publisher databases.

In plain words
What is it for?
Use it to review a research paper before submitting, check reused passages in co-authored or AI-assisted drafts, and identify overlapping text that needs quotation or citation.
Why use it?
It helps catch accidental copying, close paraphrasing, and self-plagiarism before submission. It is an early check, not an official report from services such as iThenticate or Turnitin.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to review a research paper before submitting, check reused passages in co-authored or AI-assisted drafts, and identify overlapping text that needs quotation or citation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/shaishavmaisuria/research-paper-lifecycle-skills/check-originality
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 ShaishavMaisuria/research-paper-lifecycle-skills --skill check-originality
Clone the repo
git clone --depth 1 https://github.com/ShaishavMaisuria/research-paper-lifecycle-skills

Made for: Claude Code, Codex.

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 check-originality

README.md
[![agentmods](https://agentmods.dev/badge/skills/shaishavmaisuria/research-paper-lifecycle-skills/check-originality/github.svg)](https://agentmods.dev/skills/shaishavmaisuria/research-paper-lifecycle-skills/check-originality)
Your own site
<a href="https://agentmods.dev/skills/shaishavmaisuria/research-paper-lifecycle-skills/check-originality"><img src="https://agentmods.dev/badge/skills/shaishavmaisuria/research-paper-lifecycle-skills/check-originality/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 check-originality

Your own site · 80×15
<a href="https://agentmods.dev/skills/shaishavmaisuria/research-paper-lifecycle-skills/check-originality"><img src="https://agentmods.dev/badge/skills/shaishavmaisuria/research-paper-lifecycle-skills/check-originality.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 213 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,261 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 $0.00213 $0.01261
Opus 5 $0.00106 $0.00630
Sonnet 5 $0.00043 $0.00252
Haiku 4.5 $0.00021 $0.00126

Measured 12d ago against content hash f1cf9b198924, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

check-originality 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 12d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/overlap_check.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/check-originality/SKILL.md · 59 lines

How it starts

The opening of the file, as written. The whole thing — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Check Originality

Multi-method originality check that catches the overlap which actually gets papers desk-rejected or retracted — before an editor's integrity scan does.

Read this honestly and tell the user: this is not iThenticate or Turnitin. It has no access to any private publisher corpus, so it cannot guarantee a passage is original against all published literature. What it does reliably is detect overlap against sources you can name or fetch, internal text recycling, and distinctive phrases that are publicly searchable. For a journal's official originality report you still need the publisher's tool — this gets your draft clean first.

When to use

  • Before submission, to catch accidental copy-paste and close paraphrase.
  • When reusing your own prior work (text recycling / self-plagiarism is a real violation at most venues even though it's "your" text).
  • When a co-authored draft may contain a collaborator's verbatim text from elsewhere.
  • After heavy AI drafting, to confirm nothing was reproduced verbatim from a source.

The detection methods (run several — that's what "catch it properly" means)

See references/detection-methods.md for the full method and thresholds.

  1. Source overlap — shingle (k-gram) comparison against sources the user provides or that fetch-paper pulls (open-access only). Reports matched passages + overlap %.
  2. Self-plagiarism / recycling — near-duplicate passages against the author's own prior papers, and internal duplication within the draft.
  3. Quote & paraphrase integrity — verbatim spans that lack quotation marks or a citation; paraphrases that stay too close to the source's wording.
  4. Distinctive-phrase external search — pull the draft's most distinctive long phrases and search the web / Semantic Scholar for verbatim matches the local check can't see.
  5. Common-knowledge vs needs-citation — flag factual claims presented without a citation that likely need one (hand off specifics to verify-citations).

Read the full file on GitHub · 59 lines

Files

What ships with it

2 files 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. 12d ago First seen · 59 lines · 213 tokens per session scan A f1cf9b198924

Subscribe to this mod's changes

check-originality is a skill published in the GitHub repository ShaishavMaisuria/research-paper-lifecycle-skills (42 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 213 tokens to every session and 1,261 once invoked, about $0.0011 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 2026-08-30.

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