A method for solving coding tasks with the smallest amount of code that still works correctly.

Use it to decide whether code is needed at all, then prefer the standard library, platform features, existing dependencies, or a minimal implementation.

It helps prevent unnecessary abstractions, dependencies, and custom code from making a solution harder to understand and maintain.

ponytail — Skill for Claude Code by akillness

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 akillness/jeo-skills --skill ponytail

Clone the repo

git clone --depth 1 https://github.com/akillness/jeo-skills

Made for: Claude Code.

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/akillness/jeo-skills/ponytail/github.svg)](https://agentmods.dev/skills/akillness/jeo-skills/ponytail)

Your own site

<a href="https://agentmods.dev/skills/akillness/jeo-skills/ponytail"><img src="https://agentmods.dev/badge/skills/akillness/jeo-skills/ponytail/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/akillness/jeo-skills/ponytail"><img src="https://agentmods.dev/badge/skills/akillness/jeo-skills/ponytail.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 199 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,605 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 unknown 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	$0.00199	$0.02605
Opus 5	$0.00100	$0.01303
Sonnet 5	$0.00040	$0.00521
Haiku 4.5	$0.00020	$0.00261

Measured 7d ago against content hash 126eaae77da6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

ponytail 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 7d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/install.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.agent-skills/ponytail/SKILL.md · 226 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

7d ago First seen · 226 lines · 199 tokens per session scan A 126eaae77da6

Subscribe to this mod's changes

ponytail is a skill published in the GitHub repository akillness/jeo-skills (45 stars, last pushed yesterday), with no licence file. It adds 199 tokens to every session and 2,605 once invoked, about $0.0010 per session on Opus 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 2026-09-03.

Planning Productivity

orbit-notion

Open Orbit briefing skill — selected by the Orbit pipeline when Notion is the user's only connected connector, or when the user explicitly scopes their daily digest to Notion. Pulls the past 24 hours of document edits, comments, mentions, and database row changes from the user's authenticated Notion connection and…

nexu-io/open-design · 117 tokens

Cortex

Operate Cortex, the LifeOS memory system — the typed Knowledge Archive (People, Companies, Ideas, Research with typed related: links) plus recall of prior work sessions, ISAs, and conversations. Search, add, harvest, develop, ingest, distill, graph-navigate, recall. USE WHEN cortex, knowledge, knowledge base, search…

danielmiessler/LifeOS · 196 tokens

pinchtab-mcp

Use this skill when a task requires browser automation through PinchTab's MCP server connected to a remote browser instance. Covers navigation, element interaction, data extraction, form filling, multi-step flows, and session management via MCP tools.

pinchtab/pinchtab · 52 tokens

ponytail