Agent skill

Tells

by AThevon in AThevon/genjutsu

Internal genjutsu module - the reflexes a model falls into when nothing asked for them (invented data, decorative filler, converged layouts, hollow copy), each named by its evidence and a question…

Custom licenceAuto-check passedEducation

Install Tells

skills CLI
$ npx skills add AThevon/genjutsu --skill tells -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install AThevon/genjutsu tells --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/AThevon/genjutsu.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/_jutsu/tells .claude/skills/tells && rm -rf skills-src

Use ~/.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/

Facts

Skill name
tells
GitHub stars
440
Token cost
~1.9k tokens
SKILL.md length
1,113 words
Files
2 (incl. references)
Skills in repo
20
Repo updated
First seen
Licence
Custom licence

At a glance

Internal genjutsu module - the reflexes a model falls into when nothing asked for them (invented data, decorative filler, converged layouts, hollow copy), each named by its evidence and a question…

  • Works in 4 steps: Look for the pattern in the validated… → Found: list the finding as allowed by… → The detection contradicts the entry's… → …
  • Tasks that involve Essays and academic help
  • SKILL.md covers The rule: the thesis is the…, How an entry is written, The four families and Platform coverage, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Tells is an agent skill from AThevon/genjutsu. Internal genjutsu module - the reflexes a model falls into when nothing asked for them (invented data, decorative filler, converged layouts, hollow copy), each named by its evidence and a question back to the validated thesis. Loaded by cast and paint on web stacks, after the thesis gate.

Its SKILL.md is about 1.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/web.md`).

It sits in Education, covering Essays and academic help. The repository describes itself as: Creative coding skills for Claude Code, claude.ai and Cowork. Motion, micro-interactions and design systems across Web (GSAP, Motion, Three.js, CSS), Android (Jetpack Compose)…

When your agent uses it

  • Tasks that involve Essays and academic help

Example prompts

  • “/tells”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Look for the pattern in the validated thesis's Allowed patterns: line.
  2. Found: list the finding as allowed by the thesis, with that entry quoted.
  3. The detection contradicts the entry's own marker (a loop that reports a real loading state, a
  4. Otherwise it is a problem. Fix it only on the lines this run wrote, run the check again (two

What it can do on your machine

Read from SKILL.md and the folder at commit 1f518a7. 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

Tells loads about 1.9k tokens when it runs, and up to ~6.2k if it reads all its reference files. Until then it costs about 74 tokens; SKILL.md has 1,113 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~74
When it runs · the whole SKILL.md, loaded when a task matches
~1.9k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~6.2k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,113 words (~1,881 tokens).

“A tell is a default the thesis never asked for.”

— opening of SKILL.md by AThevon, Custom licence
name
tells
metadata.internal
true

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file (references) in skills/_jutsu/tells of AThevon/genjutsu.

  • SKILL.md
  • references/web.md

Open the folder on GitHubat commit 1f518a7

Compare with similar skills

Tells 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.

Tells compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Tells this skillAThevon/genjutsu440—~1.9kAutomated safety check: PassCustom licence
Academic Paper StrategistAAASS554/codex-academic-paper-skills5391 repos~2.7kAutomated safety check: PassMIT
Modeling Paper Rubric and Model Selectoryushui2022/MathModel-Skill4541 repos~1.8kAutomated safety check: PassMIT
Humanities Thesisganzhi-black/humanities-thesis-skill637—~1.7kAutomated safety check: PassMIT
Skill Thesis Writeryanlin-cheng/skill-thesis-writer209—~1.6kAutomated safety check: PassCustom licence
Thesis CreatorStars-OC/thesis-creator230—~2.8kAutomated safety check: PassMIT

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Categories

Questions about Tells

What does Tells do?

Internal genjutsu module - the reflexes a model falls into when nothing asked for them (invented data, decorative filler, converged layouts, hollow copy), each named by its evidence and a question…. Tells is an agent skill from AThevon/genjutsu. Internal genjutsu module - the reflexes a model falls into when nothing asked for them (invented data, decorative filler, converged layouts, hollow copy), each named by its evidence and a question back to the validated thesis.

When should I use Tells?

Tells fits situations like: tasks that involve Essays and academic help.

How do I install Tells in Claude Code?

Run `npx skills add AThevon/genjutsu --skill tells -a claude-code`. Or copy the skill folder (skills/_jutsu/tells in AThevon/genjutsu) into .claude/skills/tells in your project. Claude Code loads it when a task matches its description.

How do I install Tells in Codex?

Run `npx skills add AThevon/genjutsu --skill tells -a codex`. Or copy the skill folder (skills/_jutsu/tells in AThevon/genjutsu) into .agents/skills/tells in your project. Codex loads it when a task matches its description.

Can I use Tells 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 AThevon/genjutsu --skill tells -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tells, .gemini/skills/tells, .github/skills/tells and .opencode/skills/tells in your project.

What does Tells need to run?

SKILL.md names no scripts, command-line tools or credentials: Tells is instructions for the agent only.

Does Tells 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 Tells 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 Tells use?

Tells has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Tells use?

About 1.9k tokens (SKILL.md is roughly 7.5k 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 4.3k tokens, read only when the agent opens those files.

What are the alternatives to Tells?

Skills that share tags, products or a category with Tells: Academic Paper Strategist (AAASS554/codex-academic-paper-skills, 539 stars), Modeling Paper Rubric and Model Selector (yushui2022/MathModel-Skill, 454 stars), Humanities Thesis (ganzhi-black/humanities-thesis-skill, 637 stars) and Skill Thesis Writer (yanlin-cheng/skill-thesis-writer, 209 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Tells?

AThevon (a GitHub user) maintains it in AThevon/genjutsu, which has 440 GitHub stars. The repository holds 20 skills in this directory. The repository was last updated on October 5, 2026.

Source: AThevon/genjutsu on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.