Story Multi-Perspective Review
zenstory-ai/oh-story-claudecode
Reviews Chinese web-novel text with several reviewer agents in parallel, falling back to a single-agent pass, and reports structure, character, prose and setting problems with fixes.
Verify reality-grounded claims against external sources in both directions before they ship — could the 'absurd' be real, could the 'obvious' be false or long-established?
Install Factchk
$ npx skills add LilMGenius/paperthin --skill factchk -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install LilMGenius/paperthin factchk --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/LilMGenius/paperthin.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/depth/factchk .claude/skills/factchk && 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 "factchk" agent skill from https://github.com/LilMGenius/paperthin/tree/main/skills/depth/factchk into .claude/skills/factchk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "factchk", 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/LilMGenius/paperthin/tree/main/skills/depth/factchkType 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 LilMGenius/paperthin --skill factchk -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install LilMGenius/paperthin factchk --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/LilMGenius/paperthin.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/depth/factchk .agents/skills/factchk && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "factchk" agent skill from https://github.com/LilMGenius/paperthin/tree/main/skills/depth/factchk into .agents/skills/factchk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "factchk", 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 LilMGenius/paperthin --skill factchk -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install LilMGenius/paperthin factchk --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/LilMGenius/paperthin.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/depth/factchk .cursor/skills/factchk && 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 "factchk" agent skill from https://github.com/LilMGenius/paperthin/tree/main/skills/depth/factchk into .cursor/skills/factchk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "factchk", 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/LilMGenius/paperthin.git --path skills/depth/factchk--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 LilMGenius/paperthin --skill factchk -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install LilMGenius/paperthin factchk --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/LilMGenius/paperthin.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/depth/factchk .gemini/skills/factchk && 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 "factchk" agent skill from https://github.com/LilMGenius/paperthin/tree/main/skills/depth/factchk into .gemini/skills/factchk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "factchk", 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 LilMGenius/paperthin factchkInstalls 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 LilMGenius/paperthin --skill factchk -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/LilMGenius/paperthin.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/depth/factchk .github/skills/factchk && 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 "factchk" agent skill from https://github.com/LilMGenius/paperthin/tree/main/skills/depth/factchk into .github/skills/factchk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "factchk", 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 LilMGenius/paperthin --skill factchk -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install LilMGenius/paperthin factchk --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/LilMGenius/paperthin.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/depth/factchk .opencode/skills/factchk && 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 "factchk" agent skill from https://github.com/LilMGenius/paperthin/tree/main/skills/depth/factchk into .opencode/skills/factchk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "factchk", 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
factchk- GitHub stars
- 1.1k
- Token cost
- ~717 tokens
- SKILL.md length
- 328 words
- Files
- 1
- Skills in repo
- 28
- Repo updated
- First seen
- Licence
- MIT
At a glance
Verify reality-grounded claims against external sources in both directions before they ship — could the 'absurd' be real, could the 'obvious' be false or long-established?
- Works in 4 steps: Scan for reality-grounded assertions —… → Verify each against external sources… → Fix or flag: a mechanically-clear error… → …
- The sentence you are about to write
- SKILL.md covers Goal, Workflow, Rules and Verification
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Factchk is an agent skill from LilMGenius/paperthin. Verify reality-grounded claims against external sources in both directions before they ship — could the 'absurd' be real, could the 'obvious' be false or long-established? Use whenever an artifact, or the sentence you are about to write, asserts something as plausible, realistic, absurd, novel, or impossible from intuition rather than a checked source; before relying on a factual claim in prose, a design rationale, a research claim, or a plan. Fires on metacognitive doubt — when you can't actually know, verify…
Its SKILL.md is about 720 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 Writing & Content, covering Creative writing and fiction. The repository describes itself as: Low-level agentic design patterns. Turning old engineering wisdom into reflexes your agent reaches for on its own—on any agent. The licence is MIT.
When your agent uses it
- The sentence you are about to write
- Asserts something as plausible
- Impossible from intuition rather than a checked source
- Before relying on a factual claim in prose
Example prompts
- “absurd”
- “obvious”
- “/factchk”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Scan for reality-grounded assertions — anything leaning on "this is plausible / realistic / absurd / novel / impossible because X,"…
- Verify each against external sources (web search, open references) in both directions: could the "absurd" be real? could the "obvious" or…
- Fix or flag: a mechanically-clear error (a wrong date, a misattributed source, a falsified number) → correct it with a cited source; a…
- Report each claim, its verdict, the source, and — for a failed claim — which direction it failed.
What it can do on your machine
Read from SKILL.md and the folder at commit 7d5dc62. 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
No URLs in SKILL.md.
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
Factchk loads about 717 tokens when it runs. Until then it costs about 166 tokens; SKILL.md has 328 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 LilMGenius/paperthin at commit 7d5dc62, republished under its MIT licence (© LilMGenius). 328 words, ~717 tokens.
Download SKILL.mdSave it as
.claude/skills/factchk/SKILL.md (or your agent's skills folder).- name
- factchk
- description
- Verify reality-grounded claims against external sources in both directions before they ship — could the 'absurd' be real, could the 'obvious' be false or long-established? Use whenever an artifact, or the sentence you are about to write, asserts something as plausible, realistic, absurd, novel, or impossible from intuition rather than a checked source; before relying on a factual claim in prose, a design rationale, a research claim, or a plan. Fires on metacognitive doubt — when you can't actually know, verify instead of trusting the feeling. Scans read-only, then fixes the clear errors or flags the judgment calls; leaves deliberate fiction alone.
Check what's asserted as real against reality — in both directions — before it ships.
Goal
The author's "plausible / absurd / novel" is the least reliable line in any artifact. Human priors fail both ways — they exclude the real (desert frogs exist) and normalize the impossible (weightless crates). factchk scans claims presented as reality-grounded, verifies each against external sources in both directions, and fixes or flags. Its scope is a claim about the world — whether what's asserted as real is real — not the soundness of a validation or the survival of a whole plan.
Workflow
- Scan for reality-grounded assertions — anything leaning on "this is plausible / realistic / absurd / novel / impossible because X," including the claim you are about to write, not only those already on the page.
- Verify each against external sources (web search, open references) in both directions: could the "absurd" be real? could the "obvious" or "novel" be false or long-established? If you cannot reach a source, flag — never assert from intuition.
- Fix or flag: a mechanically-clear error (a wrong date, a misattributed source, a falsified number) → correct it with a cited source; a judgment call (a contested or interpretive claim) → surface it, don't silently rewrite.
- Report each claim, its verdict, the source, and — for a failed claim — which direction it failed.
Rules
- Target claims asserted as reality-grounded, never deliberate fiction ("in our world, boxes float" is a declared choice). When it is unclear whether a claim is an in-world choice or a real-world assertion, flag, don't fix — the hardest call in the skill.
- Flagging only the unrealistic catches half the errors.
- The trigger is metacognition, not knowledge: you can't know every domain, so the moment you are about to assert a checkable fact from a feeling, verify it instead of trusting the feeling.
- A pass that finds nothing changes nothing.
Verification
Before finishing: every verdict traces to a citable external source, not a reworded prior intuition — and the report reads as fixes-vs-flags, not restated intuitions.
© LilMGenius, MIT. 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 skills/depth/factchk of LilMGenius/paperthin.
Open the folder on GitHubat commit 7d5dc62
Compare with similar skills
Factchk 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 |
|---|---|---|---|---|---|---|
| Factchk this skillLilMGenius/paperthin | 1.1k | — | ~717 | Automated safety check: Pass | MIT | |
| Story Multi-Perspective Reviewzenstory-ai/oh-story-claudecode | 7.4k | 3 repos | ~3k | Automated safety check: Pass | MIT | |
| Short Web Fiction Trend Scanzenstory-ai/oh-story-claudecode | 7.4k | 2 repos | ~1.2k | Automated safety check: Pass | MIT | |
| InkOS Creative HarnessNarcooo/inkos | 10k | 1 repos | ~1.1k | Automated safety check: Pass | AGPL-3.0 | |
| Novel Arteternityspring/shuohao-skills | 4.3k | — | ~1.1k | Automated safety check: Notes | Apache-2.0 | |
| SepiaNanako0129/sepia | 3k | — | ~3.6k | Automated safety check: Pass | MIT |
Similar skills
Short Web Fiction Trend Scan
zenstory-ai/oh-story-claudecode
Scans popular short web-fiction rankings on Chinese platforms such as Dianzhong and Heiyan to surface trending emotional hooks, themes and topic candidates with an expiry warning.
InkOS Creative Harness
Narcooo/inkos
Drives long-form fiction, scripts, storyboards, interactive films and long-document translation through InkOS, with every change made by a typed action.
Novel Art
eternityspring/shuohao-skills
给 AI 短剧出美术设定集（场景 + 叙事道具）：场景的设计意图、一致性锚点、光照时段变体、 空景提示词；道具的戏剧功能、状态变体、尺度参照、白底无手提示词。
Sepia
Nanako0129/sepia
Make AI-generated writing read as human-written, in fiction and in professional prose.
Story Toolbox Router
zenstory-ai/oh-story-claudecode
Routes a Chinese web-novel writing request to the matching tool in a 13-skill toolbox, covers author habit memory, and can launch a local dashboard for browsing a project.
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Related
Categories
Questions about Factchk
What does Factchk do?
Verify reality-grounded claims against external sources in both directions before they ship — could the 'absurd' be real, could the 'obvious' be false or long-established? Factchk is an agent skill from LilMGenius/paperthin. Verify reality-grounded claims against external sources in both directions before they ship — could the 'absurd' be real, could the 'obvious' be false or long-established?
When should I use Factchk?
Factchk fits situations like: the sentence you are about to write; asserts something as plausible; impossible from intuition rather than a checked source; before relying on a factual claim in prose.
How do I install Factchk in Claude Code?
Run `npx skills add LilMGenius/paperthin --skill factchk -a claude-code`. Or copy the skill folder (skills/depth/factchk in LilMGenius/paperthin) into .claude/skills/factchk in your project. Claude Code loads it when a task matches its description.
How do I install Factchk in Codex?
Run `npx skills add LilMGenius/paperthin --skill factchk -a codex`. Or copy the skill folder (skills/depth/factchk in LilMGenius/paperthin) into .agents/skills/factchk in your project. Codex loads it when a task matches its description.
Can I use Factchk 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 LilMGenius/paperthin --skill factchk -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/factchk, .gemini/skills/factchk, .github/skills/factchk and .opencode/skills/factchk in your project.
What does Factchk need to run?
SKILL.md names no scripts, command-line tools or credentials: Factchk is instructions for the agent only.
Does Factchk access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Factchk 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 Factchk use?
Factchk is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Factchk use?
About 717 tokens (SKILL.md is roughly 2.9k 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 Factchk?
Skills that share tags, products or a category with Factchk: Story Multi-Perspective Review (zenstory-ai/oh-story-claudecode, 7.4k stars), Short Web Fiction Trend Scan (zenstory-ai/oh-story-claudecode, 7.4k stars), InkOS Creative Harness (Narcooo/inkos, 10k stars) and Novel Art (eternityspring/shuohao-skills, 4.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Factchk?
LilMGenius (a GitHub user) maintains it in LilMGenius/paperthin, which has 1,130 GitHub stars. The repository holds 28 skills in this directory. The repository was last updated on October 1, 2026.
Source: LilMGenius/paperthin on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.