Content Research Writer
weapp-tailwindcss/weapp-tailwindcss
Assists in writing high-quality content by conducting research, adding citations, improving hooks, iterating on outlines, and providing real-time feedback on each section.
Match a pasted list of academic references against the Crossref REST API and produce a four-column markdown table (original, matched, confidence, flags) with canonical APA citations and DOIs.
Install Crossref
$ npx skills add franklee16/academic-research-skills --skill crossref -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install franklee16/academic-research-skills crossref --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/franklee16/academic-research-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/reference-citation/crossref-main .claude/skills/crossref && 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 "crossref" agent skill from https://github.com/franklee16/academic-research-skills/tree/master/reference-citation/crossref-main into .claude/skills/crossref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossref", 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/franklee16/academic-research-skills/tree/master/reference-citation/crossref-mainType 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 franklee16/academic-research-skills --skill crossref -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install franklee16/academic-research-skills crossref --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/franklee16/academic-research-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/reference-citation/crossref-main .agents/skills/crossref && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "crossref" agent skill from https://github.com/franklee16/academic-research-skills/tree/master/reference-citation/crossref-main into .agents/skills/crossref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossref", 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 franklee16/academic-research-skills --skill crossref -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install franklee16/academic-research-skills crossref --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/franklee16/academic-research-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/reference-citation/crossref-main .cursor/skills/crossref && 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 "crossref" agent skill from https://github.com/franklee16/academic-research-skills/tree/master/reference-citation/crossref-main into .cursor/skills/crossref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossref", 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/franklee16/academic-research-skills.git --path reference-citation/crossref-main--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 franklee16/academic-research-skills --skill crossref -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install franklee16/academic-research-skills crossref --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/franklee16/academic-research-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/reference-citation/crossref-main .gemini/skills/crossref && 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 "crossref" agent skill from https://github.com/franklee16/academic-research-skills/tree/master/reference-citation/crossref-main into .gemini/skills/crossref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossref", 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 franklee16/academic-research-skills crossrefInstalls 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 franklee16/academic-research-skills --skill crossref -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/franklee16/academic-research-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/reference-citation/crossref-main .github/skills/crossref && 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 "crossref" agent skill from https://github.com/franklee16/academic-research-skills/tree/master/reference-citation/crossref-main into .github/skills/crossref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossref", 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 franklee16/academic-research-skills --skill crossref -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install franklee16/academic-research-skills crossref --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/franklee16/academic-research-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/reference-citation/crossref-main .opencode/skills/crossref && 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 "crossref" agent skill from https://github.com/franklee16/academic-research-skills/tree/master/reference-citation/crossref-main into .opencode/skills/crossref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossref", 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
crossref- GitHub stars
- 223
- Token cost
- ~3.6k tokens
- SKILL.md length
- 1,857 words
- Files
- 5 (incl. scripts, references)
- Skills in repo
- 1,616
- Repo updated
- First seen
- Licence
- None found
At a glance
Match a pasted list of academic references against the Crossref REST API and produce a four-column markdown table (original, matched, confidence, flags) with canonical APA citations and DOIs.
- Works in 8 steps: Bootstrap and smoke-test (first run only) → Parse the pasted reference list → Query Crossref for each row in order → …
- The user pastes a bibliography
- SKILL.md covers Overview, Workflow and Reference
- Runs Python scripts from its folder; calls python; reaches doi.org
What it does
Crossref is an agent skill from franklee16/academic-research-skills. Match a pasted list of academic references against the Crossref REST API and produce a four-column markdown table (original, matched, confidence, flags) with canonical APA citations and DOIs. Use whenever the user pastes a bibliography or reference list and wants to verify, clean up, canonicalize, or find DOIs for those references — triggers include "verify bibliography", "match these references", "find DOIs for this reference list", "canonicalize my citations", "clean up the reference list against Crossref"…
Its SKILL.md is about 3.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including scripts and reference files (for example `README.md`, `references/crossref_api.md` and `scripts/crossref_query.py`).
It sits in Research & Science, covering Citation management. The repository describes itself as: Comprehensive collection of Claude Code skills for academic research in economics, finance, and social sciences.
When your agent uses it
- The user pastes a bibliography
- Reference list and wants to verify
- Find DOIs for those references — triggers include verify bibliography
- Match these references
Example prompts
- “verify bibliography”
- “match these references”
- “find DOIs for this reference list”
- “/crossref”
Requirements
- Python 3
Workflow steps
8 steps, taken from the step headings in SKILL.md.
- Bootstrap and smoke-test (first run only)
- Parse the pasted reference list
- Query Crossref for each row in order
- Pick the best candidate
- Fill the matched column with an APA 7 citation
- Fill the confidence column
- Fill the flags column
- Render the final table
What it can do on your machine
Read from SKILL.md and the folder at commit 9a4b2db. 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
Ships 1 file in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
python
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:
doi.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
Crossref loads about 3.6k tokens when it runs, and up to ~5.4k if it reads all its reference files. Until then it costs about 159 tokens; SKILL.md has 1,857 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); the scripts in this folder are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 1,857 words (~3,551 tokens).
“Given a pasted bibliography, match every reference against Crossref (via a bundled script) and return one markdown table with columns original, matched, confidence, flags. The script only does the HTTP call; Claude does all parsing, matching judgement, APA formatting, and…”
- name
- crossref
Files
SKILL.md and 4 other files (scripts, references) in reference-citation/crossref-main of franklee16/academic-research-skills.
- SKILL.md
- .gitignore
- README.md
- references/crossref_api.md
- scripts/crossref_query.py
Open the folder on GitHubat commit 9a4b2db
Compare with similar skills
Crossref 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 |
|---|---|---|---|---|---|---|
| Crossref this skillfranklee16/academic-research-skills | 223 | — | ~3.6k | Automated safety check: Pass | None | |
| Content Research Writerweapp-tailwindcss/weapp-tailwindcss | 1.9k | 25 repos | ~3.5k | Automated safety check: Pass | MIT | |
| NetworkxzLanqing/codex-claude-academic-skills | 4.6k | 16 repos | ~3.2k | Automated safety check: Pass | BSD-3-Clause | |
| Citation Verification GuideGalaxy-Dawn/claude-scholar | 5.7k | 3 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Systematic Review ScreenerImbad0202/academic-research-skills | 51k | — | ~8.4k | Automated safety check: Pass | Custom licence | |
| Literature Reviewneflibata-feng/MyArxiv-Agent | 126 | 21 repos | ~5.9k | Automated safety check: Notes | MIT |
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Citation Verification Guide
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Reference guidance for checking every citation in academic writing against canonical sources such as DOI, arXiv, CrossRef and Semantic Scholar, to catch fake or wrong references.
Systematic Review Screener
Imbad0202/academic-research-skills
Screens records for systematic, scoping and rapid reviews against fixed eligibility rules, using two blinded AI reviewers and a third adjudicator, with traceable PRISMA counts.
Literature Review
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Conduct comprehensive, systematic literature reviews using multiple academic databases (PubMed, arXiv, bioRxiv, Semantic Scholar, etc.).
Citation Management
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Finds papers in OpenAlex, PubMed and Google Scholar, turns DOIs, PMIDs and arXiv IDs into clean BibTeX, and validates citations for a manuscript or thesis.
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Categories
Questions about Crossref
What does Crossref do?
Match a pasted list of academic references against the Crossref REST API and produce a four-column markdown table (original, matched, confidence, flags) with canonical APA citations and DOIs. Crossref is an agent skill from franklee16/academic-research-skills. Match a pasted list of academic references against the Crossref REST API and produce a four-column markdown table (original, matched, confidence, flags) with canonical APA citations and DOIs.
When should I use Crossref?
Crossref fits situations like: the user pastes a bibliography; reference list and wants to verify; find DOIs for those references — triggers include verify bibliography; match these references.
How do I install Crossref in Claude Code?
Run `npx skills add franklee16/academic-research-skills --skill crossref -a claude-code`. Or copy the skill folder (reference-citation/crossref-main in franklee16/academic-research-skills) into .claude/skills/crossref in your project. Claude Code loads it when a task matches its description.
How do I install Crossref in Codex?
Run `npx skills add franklee16/academic-research-skills --skill crossref -a codex`. Or copy the skill folder (reference-citation/crossref-main in franklee16/academic-research-skills) into .agents/skills/crossref in your project. Codex loads it when a task matches its description.
Can I use Crossref 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 franklee16/academic-research-skills --skill crossref -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/crossref, .gemini/skills/crossref, .github/skills/crossref and .opencode/skills/crossref in your project.
What does Crossref need to run?
Going by SKILL.md and its folder, Crossref needs Python for the scripts in its folder and the command-line tools its instructions call (python). Our summary lists: Python 3.
Does Crossref access the network?
SKILL.md names 1 domain. In commands or code: doi.org; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Crossref 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Crossref use?
No licence was found for Crossref or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Crossref use?
About 3.6k tokens (SKILL.md is roughly 14k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.9k tokens, read only when the agent opens those files.
What are the alternatives to Crossref?
Skills that share tags, products or a category with Crossref: Content Research Writer (weapp-tailwindcss/weapp-tailwindcss, 1.9k stars), Networkx (zLanqing/codex-claude-academic-skills, 4.6k stars), Citation Verification Guide (Galaxy-Dawn/claude-scholar, 5.7k stars) and Systematic Review Screener (Imbad0202/academic-research-skills, 51k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Crossref?
franklee16 (a GitHub user) maintains it in franklee16/academic-research-skills, which has 223 GitHub stars. The repository holds 1,616 skills in this directory. The repository was last updated on September 18, 2026.
Source: franklee16/academic-research-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.