agentmods.dev

geode: Skill for Claude Code

.agents/skills/ponytail/SKILL.md

ponytail is a skill for Claude Code from 8thpark/geode. It costs 184 tokens per session (1,610 once invoked), scanned A, original, GPL-3.0.

A skill that encourages the simplest solution that meets the need, including questioning whether a task is necessary and considering built-in tools before extra code or dependencies.

In plain words
What is it for?
Use it when deciding whether to build a feature and when choosing between a small existing tool and a custom implementation.
Why use it?
It helps reduce unnecessary code, dependencies, and maintenance.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: installed under .agents/ (shared by several agents).

This is 8thpark/geode's own configuration. It tells Claude Code how to work on geode itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything geode configures →

not rated 34repo 3d ago A scan 184 tokens GPL-3.0
View source ↗ 8thpark/geode
Reuse

Borrowing it

Nothing to install: this file belongs to 8thpark/geode. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/8thpark/geode/main/.agents/skills/ponytail/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/8thpark/geode

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.

agentmods badge for ponytail

README.md
[![agentmods](https://agentmods.dev/badge/skills/8thpark/geode/ponytail/github.svg)](https://agentmods.dev/skills/8thpark/geode/ponytail)
Your own site
<a href="https://agentmods.dev/skills/8thpark/geode/ponytail"><img src="https://agentmods.dev/badge/skills/8thpark/geode/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.

agentmods 80×15 button for ponytail

Your own site · 80×15
<a href="https://agentmods.dev/skills/8thpark/geode/ponytail"><img src="https://agentmods.dev/badge/skills/8thpark/geode/ponytail.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 184 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,610 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00184 $0.01610
Opus 5.5 $0.00074 $0.00644
Sonnet 5.5 $0.00037 $0.00322
Haiku 4.5 $0.00018 $0.00161

Measured 2mo ago against content hash 1316a2f3f957, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 2mo 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.

.agents/skills/ponytail/SKILL.md · 121 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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.

  1. 2mo ago First seen · 121 lines · 184 tokens per session scan A 1316a2f3f957

Subscribe to this mod's changes

ponytail is a skill published in the GitHub repository 8thpark/geode (34 stars, last pushed 3d ago), licensed GPL-3.0. It adds 184 tokens to every session and 1,610 once invoked, about $0.0007 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 2026-08-30.

agentsapimcpobsidianobsidian-pluginobsidian-vault
Related

ponytail compared with skills from other repositories

ponytail next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
ponytail8thpark/geodeSkill343d agoGPL-3.0A184Claude Code
api-testing-patternsproffesor-for-testing/agentic-qeSkill525yesterdayMITA34Claude Code
contract-testingproffesor-for-testing/agentic-qeSkill525yesterdayMITA35Claude Code
obsidiangapmiss/obsidian-plugin-skillSkill196yesterdayMITA105Claude Code, Codex
switchultracontext/ultracontextSkill44010d agoApache-2.0A16Claude Code
presentationiii-hq/iiiSkill19ktodaynoneA51Claude Code, Codex
iii-observeiii-hq/iiiSkill19ktodaynoneA66Claude Code, Codex