A routing tool for the YYLO workflow skills library. YYLO is a command-line workflow system with a board for tasks, planning records, project knowledge, and implementation work.

Use it to manage board tasks, plan product requirements, break work into implementation-sized tasks, and maintain durable project records through YYLO.

It avoids manually finding the right specialized YYLO skill for each workflow request. It also directs work to the installed commands rather than guessing which commands are available.

yylo-ninja — Skill for Claude Code and Codex by fabricioctelles

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add fabricioctelles/jump-skills --skill yylo-ninja

Clone the repo

git clone --depth 1 https://github.com/fabricioctelles/jump-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/fabricioctelles/jump-skills/yylo-ninja/github.svg)](https://agentmods.dev/skills/fabricioctelles/jump-skills/yylo-ninja)

Your own site

<a href="https://agentmods.dev/skills/fabricioctelles/jump-skills/yylo-ninja"><img src="https://agentmods.dev/badge/skills/fabricioctelles/jump-skills/yylo-ninja/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/fabricioctelles/jump-skills/yylo-ninja"><img src="https://agentmods.dev/badge/skills/fabricioctelles/jump-skills/yylo-ninja.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 209 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,123 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00209	$0.02123
Opus 5.5	$0.00084	$0.00849
Sonnet 5.5	$0.00042	$0.00425
Haiku 4.5	$0.00021	$0.00212

Measured 1mo ago against content hash 21d806e9b188, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

yylo-ninja scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

ninjas/yylo-ninja/SKILL.md · 181 lines

How it starts

The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.

YYLO Ninja

Jump Skill — Master orchestrator that routes YYLO workflow tasks to 7 specialized skills from the official YYLO repository.

Purpose

This skill acts as an intelligent router to the canonical YYLO skills library. Instead of manually searching for the right skill, describe your workflow task and this skill will:

Identify the most relevant specialized skill(s)
Load the full skill instructions on demand
Execute the task with expert-level YYLO knowledge

Prerequisites

The skills drive the yy CLI (npm package @yylo/cli, Node.js 20.10+ and Git). Before executing a task:

Verify yy --help works; if not, install with npm install --global '@yylo/cli@latest'
yy ledger and yy benchmark delegate to the separately installed yylo-ledger / yylo-benchmark CLIs — Record namespaces must appear in the installed yy ledger --help before an agent uses them
The four Ledger Record skills (wiki, workflow, artifact, ledger-tasks) are usable with standalone Ledger; the planning and execution skills rely on YYLO orchestration
Inspect COMMAND --help before acting; if a namespace is absent, the installed version does not expose it — do not fall back to editing Ledger storage directly

Read operations (listing tasks, searching wiki Records, inspecting artifacts) are safe to run directly. Mutating operations (finishing tasks, landing merges, creating Records) change repository state — confirm with the user first, and never push, deploy, or mutate production without separate authority.

Skill Catalog

Task Management

Skill	Path	Use When
`ledger-tasks-yylo`	`{{JUMP_SKILLS_DIR}}/repos/yylo-ninja/yylo-skills/skills/ledger-tasks-yylo/`	Operate the YYLO Ledger board: create, list, search, mark, update, archive tasks, manage dependencies and ordering
`plan-ledger-tasks-yylo`	`{{JUMP_SKILLS_DIR}}/repos/yylo-ninja/yylo-skills/skills/plan-ledger-tasks-yylo/`	User explicitly asks to plan or register work: draft one concise PDR and create implementation-sized Ledger tasks
`understand-project-yylo`	`{{JUMP_SKILLS_DIR}}/repos/yylo-ninja/yylo-skills/skills/understand-project-yylo/`	Inspect product architecture, dependencies, and validation loops BEFORE planning or implementing a change

Read the full file on GitHub · 181 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 181 lines · 209 tokens per session scan A 21d806e9b188

Subscribe to this mod's changes

yylo-ninja is a skill published in the GitHub repository fabricioctelles/jump-skills (33 stars, last pushed 2d ago), licensed MIT. It adds 209 tokens to every session and 2,123 once invoked, about $0.0008 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-16.

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