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.
npx skills add kleosr/kleosrules --skill ponytailgit clone --depth 1 https://github.com/kleosr/kleosrulesWrote 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.
[](https://agentmods.dev/skills/kleosr/kleosrules/ponytail)<a href="https://agentmods.dev/skills/kleosr/kleosrules/ponytail"><img src="https://agentmods.dev/badge/skills/kleosr/kleosrules/ponytail.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00025 | $0.00352 |
| Opus 5 | $0.00013 | $0.00176 |
| Sonnet 5 | $0.00005 | $0.00070 |
| Haiku 4.5 | $0.00003 | $0.00035 |
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 today.
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.
What it actually says
Ponytail
Thin roof: ponytail.mdc. stop.sh checks rewrite and mass reindent only.
Ladder
First rung that still does the job:
- No code — config, delete, existing API.
- Reuse — Grep this repo.
- Stdlib.
- Framework native.
- Already-installed dep (new package: one chat line why lower rungs fail).
- One clear line.
- Minimum private-native diff. Soft ~80 LOC. Split before 120. Hard 300. Never 500. Files >700: modules ≤300.
Skipping a rung: one chat line naming why.
Quality
Match 1–2 siblings. Named exports. Early return. Nesting ≤2. No any / un-narrowed unknown / blind casts. Zero prose comments. Zero dead or redundant code. Infer loading from data. Jargon: bans.txt beside this file (fail-open if missing). Behavior change: test when the testing skill applies.
Split
Read → plan → Write new modules → StrReplace original to imports → Grep callers. Never Shell sed/echo>/tee.
domains/ trees: domains-ddd.md. frontend/ + backend/: fe-be-layout.md.
Floors
Trust, authz, data-loss, a11y, explicit asks. Cyclo: complexity.mdc. Off only if the user says stop ponytail.
What ships with it
3 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.
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.
- today Changed · -44 lines 280dafdba401
- 2d ago Changed · -1 lines · -28 tokens per session 32b6adf18e42
- 7d ago First seen · 84 lines · 53 tokens per session scan A 2909979f759d
ponytail is a skill published in the GitHub repository kleosr/kleosrules (2 stars, last pushed yesterday), licensed MIT. It adds 25 tokens to every session and 352 once invoked, about $0.0001 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 2026-08-31.
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