Literature Review
neflibata-feng/MyArxiv-Agent
Conduct comprehensive, systematic literature reviews using multiple academic databases (PubMed, arXiv, bioRxiv, Semantic Scholar, etc.).
Verify, normalize, and enrich a single citation or paper identifier.
Install Citation Verifier
$ npx skills add hashgraph-online/awesome-codex-plugins --skill citation-verifier -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins citation-verifier --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier .claude/skills/citation-verifier && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "citation-verifier" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier into .claude/skills/citation-verifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "citation-verifier", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifierType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add hashgraph-online/awesome-codex-plugins --skill citation-verifier -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins citation-verifier --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier .agents/skills/citation-verifier && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "citation-verifier" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier into .agents/skills/citation-verifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "citation-verifier", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add hashgraph-online/awesome-codex-plugins --skill citation-verifier -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins citation-verifier --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier .cursor/skills/citation-verifier && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "citation-verifier" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier into .cursor/skills/citation-verifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "citation-verifier", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/hashgraph-online/awesome-codex-plugins.git --path plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add hashgraph-online/awesome-codex-plugins --skill citation-verifier -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins citation-verifier --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier .gemini/skills/citation-verifier && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "citation-verifier" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier into .gemini/skills/citation-verifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "citation-verifier", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install hashgraph-online/awesome-codex-plugins citation-verifierInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add hashgraph-online/awesome-codex-plugins --skill citation-verifier -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier .github/skills/citation-verifier && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "citation-verifier" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier into .github/skills/citation-verifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "citation-verifier", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add hashgraph-online/awesome-codex-plugins --skill citation-verifier -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins citation-verifier --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier .opencode/skills/citation-verifier && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "citation-verifier" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier into .opencode/skills/citation-verifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "citation-verifier", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
citation-verifier- GitHub stars
- 1.3k
- Token cost
- ~548 tokens
- SKILL.md length
- 271 words
- Files
- 1
- Skills in repo
- 714
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Verify, normalize, and enrich a single citation or paper identifier.
- Works in 4 steps: Accept whatever the user provides: DOI,… → Call verify_citation with the raw input. → If verification succeeds, call fetch… → …
- The user pastes a DOI
- SKILL.md covers Workflow, Output Style, Tool Guidance and Examples
- Reaches arxiv.org
What it does
Citation Verifier is an agent skill from hashgraph-online/awesome-codex-plugins. Verify, normalize, and enrich a single citation or paper identifier. Use when the user pastes a DOI, URL, arXiv ID, PubMed ID, citation string, or paper title and wants it checked.
Its SKILL.md is about 550 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Research & Science, covering Academic paper search and Citation management. It works with arXiv, PubMed and Semantic Scholar. The repository describes itself as: A curated list of awesome OpenAI Codex / ChatGPT plugins, skills, and resources. The 1 Codex Marketplace. See live plugins at: https://hol.org/plugins/best-codex-plugins. The licence is Apache-2.0.
When your agent uses it
- The user pastes a DOI
- Citation string
- Paper title and wants it checked
Example prompts
- “/citation-verifier”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Accept whatever the user provides: DOI, URL, arXiv ID, PubMed ID, citation string, or a partial title.
- Call verify_citation with the raw input.
- If verification succeeds, call fetch with the resolved identifier to get the full paper record.
- Present the normalized result.
What it can do on your machine
Read from SKILL.md and the folder at commit 9e7b281. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
arxiv.org
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Citation Verifier loads about 548 tokens when it runs. Until then it costs about 50 tokens; SKILL.md has 271 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from hashgraph-online/awesome-codex-plugins at commit 9e7b281, republished under its Apache-2.0 licence (© hashgraph-online). 271 words, ~548 tokens.
Download SKILL.mdSave it as
.claude/skills/citation-verifier/SKILL.md (or your agent's skills folder).- name
- citation-verifier
- description
- Verify, normalize, and enrich a single citation or paper identifier. Use when the user pastes a DOI, URL, arXiv ID, PubMed ID, citation string, or paper title and wants it checked.
Citation Verifier
Use this skill when the user wants to quickly verify or normalize a single paper reference rather than run a full literature search.
Workflow
- Accept whatever the user provides: DOI, URL, arXiv ID, PubMed ID, citation string, or a partial title.
- Call
verify_citationwith the raw input. - If verification succeeds, call
fetchwith the resolved identifier to get the full paper record. - Present the normalized result.
Output Style
Return a clean, structured card with:
- Title — full paper title
- Authors — first three authors, et al. if more
- Year — publication year
- Venue — journal or conference
- DOI — canonical DOI if available
- Identifiers — any additional IDs (arXiv, PubMed, Semantic Scholar)
- Status — whether the citation was verified successfully or had issues
If verification fails or is ambiguous, say so clearly and suggest what the user can try (e.g., a more complete title, a different identifier).
Tool Guidance
Use verify_citation
Always call this first. It handles:
- DOI strings (with or without resolver prefix)
- arXiv IDs (e.g.,
2301.12345,arXiv:2301.12345) - PubMed IDs
- full or partial URLs from publisher sites, Semantic Scholar, Google Scholar
- free-text citation strings (e.g., "Smith et al. 2020, Neural networks for...")
Use fetch
Call after successful verification to hydrate the full paper record with abstract, citation count, and venue details.
Do NOT use
search_literature— this skill is for a known reference, not topic discoveryget_citation_graph— the user wants verification, not graph exploration
Examples
- User pastes:
10.1038/s41586-021-03819-2 - User pastes:
https://arxiv.org/abs/2301.12345 - User says: "Check this cite: Vaswani et al., Attention Is All You Need, NeurIPS 2017"
- User says: "Is this DOI valid? 10.1234/fake.doi.000"
- User pastes a Semantic Scholar or Google Scholar URL
© hashgraph-online, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier of hashgraph-online/awesome-codex-plugins.
Open the folder on GitHubat commit 9e7b281
Compare with similar skills
Citation Verifier next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Citation Verifier this skillhashgraph-online/awesome-codex-plugins | 1.3k | — | ~548 | Automated safety check: Pass | Apache-2.0 | |
| Literature Reviewneflibata-feng/MyArxiv-Agent | 126 | 20 repos | ~5.9k | Automated safety check: Notes | MIT | |
| Nature Academic Searchjing1312/nature-figure-skill | 168 | — | ~1.3k | Automated safety check: Notes | MIT | |
| Literature ReviewK-Dense-AI/scientific-agent-skills | 48k | 1 repos | ~3.2k | Automated safety check: Notes | MIT | |
| Literature ReviewNorman-bury/research-writing-skill | 3.4k | — | ~2.2k | Automated safety check: Notes | MIT | |
| Academic Research HubLeoYeAI/openclaw-master-skills | 2.2k | 1 repos | ~4.8k | Automated safety check: Pass | Proprietary |
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Works with
Categories
Questions about Citation Verifier
What does Citation Verifier do?
Verify, normalize, and enrich a single citation or paper identifier. Citation Verifier is an agent skill from hashgraph-online/awesome-codex-plugins. Verify, normalize, and enrich a single citation or paper identifier.
When should I use Citation Verifier?
Citation Verifier fits situations like: the user pastes a DOI; citation string; paper title and wants it checked.
How do I install Citation Verifier in Claude Code?
Run `npx skills add hashgraph-online/awesome-codex-plugins --skill citation-verifier -a claude-code`. Or copy the skill folder (plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier in hashgraph-online/awesome-codex-plugins) into .claude/skills/citation-verifier in your project. Claude Code loads it when a task matches its description.
How do I install Citation Verifier in Codex?
Run `npx skills add hashgraph-online/awesome-codex-plugins --skill citation-verifier -a codex`. Or copy the skill folder (plugins/papersflow-ai/papersflow-codex-plugin/skills/citation-verifier in hashgraph-online/awesome-codex-plugins) into .agents/skills/citation-verifier in your project. Codex loads it when a task matches its description.
Can I use Citation Verifier in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hashgraph-online/awesome-codex-plugins --skill citation-verifier -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/citation-verifier, .gemini/skills/citation-verifier, .github/skills/citation-verifier and .opencode/skills/citation-verifier in your project.
What does Citation Verifier need to run?
SKILL.md names no scripts, command-line tools or credentials: Citation Verifier is instructions for the agent only.
Does Citation Verifier access the network?
SKILL.md names 1 domain. In commands or code: arxiv.org; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Citation Verifier safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Citation Verifier use?
Citation Verifier is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Citation Verifier use?
About 548 tokens (SKILL.md is roughly 2.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Citation Verifier?
Skills that share tags, products or a category with Citation Verifier: Literature Review (neflibata-feng/MyArxiv-Agent, 126 stars), Nature Academic Search (jing1312/nature-figure-skill, 168 stars), Literature Review (K-Dense-AI/scientific-agent-skills, 48k stars) and Literature Review (Norman-bury/research-writing-skill, 3.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Citation Verifier?
hashgraph-online (a GitHub organization) maintains it in hashgraph-online/awesome-codex-plugins, which has 1,255 GitHub stars. The repository holds 714 skills in this directory. The repository was last updated on October 9, 2026.
Source: hashgraph-online/awesome-codex-plugins on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.