Is the Light Citation skill free?

Yes. The skill itself is free from Light0305/Light-skills. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Light Citation SkillProof Score?

9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.

How do I install Light Citation?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Light Citation with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Light Citation

Verifies references and claim-citation support with an ordered four-gate authenticity check

by Light0305 · Light0305/Light-skills

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.2/10
Tested: Jul 21, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 4164a00

Cloned the repo; SKILL.md at skills/light-citation/ parses with name+description. Spot-checked 5 referenced files (all HTTP 200) and confirmed the 7 scripts (3768 lines) import stdlib only. Security scan found only legitimate scholarly-API endpoints (doi.org, Crossref, DataCite, PubMed eutils, OpenCitations, Semantic Scholar) — no curl|sh, base64, or exfiltration. OUTPUT test: audited two citations via citation_four_gate.py offline — one clean work and one chimeric (real DOI, VERIFIED existence, but fabricated co-author = identity CONFLICT). My unaided baseline prose called the chimeric one's p.2 passage "supports the claim, so the citation could stand once the author line is corrected." The skill's gate PASSED existence but BLOCKED identity, and then mechanically BLOCKED claim_support (allowed_for_declared_purpose=false, exit 1) even though I supplied a fully-formed valid support edge with matching claim hashes — it structurally refuses to let a good support edge launder a chimeric citation, which my baseline did not. The public UNKNOWN template also correctly exits 1 as documented.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 8/10
Docs & honesty 5/5

What Light Citation does

Audits scholarly references and the claim-citation edges in a manuscript: normalizes DOI/arXiv/PMID/ISBN/URL, verifies each work against independent authoritative sources (Crossref, DataCite, PubMed), flags chimeric or fabricated citations, and runs an ordered existence to identity to publication-status to claim-support gate that a later stage cannot repair. Triggers when auditing a bibliography, checking a suspicious DOI or author list, distinguishing CONFIRMED from CONFIRMED-MISSING, or preparing a canonical citation registry (BibTeX/CSL) for typesetting.

How to install Light Citation

git clone --depth 1 https://github.com/Light0305/Light-skills.git /tmp/light-citation-src
mkdir -p ~/.claude/skills
cp -R /tmp/light-citation-src/skills/light-citation ~/.claude/skills/light-citation
# Deps: python3 only (scripts import stdlib only — no pip install needed; tested on 3.13).
# Offline: citation_four_gate.py runs with no network (ordered-gate enforcement + registry validation).
# Online: full verification (verify_refs.py, citation_registry.py --online) needs internet access to
#   Crossref / DataCite / PubMed eutils; optional OpenAlex or Semantic Scholar keys are used only in
#   request headers, never written to output. No API key required for the core free/no-key path.
# This skill is stage 10 of a larger "Light" paper pipeline; it can also be run standalone on a bib.

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Light Citation

/light-citation Verifies references and claim-citation support with an ordered four-gate authenticity check

It also activates on plain-language prompts like these:

Audit these citations for fabricated references
Verify every claim in this manuscript has support
Build a canonical citation registry for typesetting

Frequently asked questions

Is the Light Citation skill free?: Yes. The skill itself is free from Light0305/Light-skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does Light Citation work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 21, 2026. Verdict: Tested · Works. Cloned the repo; SKILL.md at skills/light-citation/ parses with name+description. Spot-checked 5 referenced files (all HTTP 200) and confirmed the 7 scripts (3768 lines) import stdlib only. Security scan found only legitimate scholarly-API endpoints (doi.org, Crossref, DataCite, PubMed eutils, OpenCitations, Semantic Scholar) — no curl|sh, base64, or exfiltration. OUTPUT test: audited two citations via citation_four_gate.py offline — one clean work and one chimeric (real DOI, VERIFIED existence, but fabricated co-author = identity CONFLICT). My unaided baseline prose called the chimeric one's p.2 passage "supports the claim, so the citation could stand once the author line is corrected." The skill's gate PASSED existence but BLOCKED identity, and then mechanically BLOCKED claim_support (allowed_for_declared_purpose=false, exit 1) even though I supplied a fully-formed valid support edge with matching claim hashes — it structurally refuses to let a good support edge launder a chimeric citation, which my baseline did not. The public UNKNOWN template also correctly exits 1 as documented.
What is the Light Citation SkillProof Score?: 9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.
How do I install Light Citation?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Light Citation with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.