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 SummerSec/SumSec-Skills --skill ponytail-helpgit clone --depth 1 https://github.com/SummerSec/SumSec-SkillsWrote 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/summersec/sumsec-skills/ponytail-help)<a href="https://agentmods.dev/skills/summersec/sumsec-skills/ponytail-help"><img src="https://agentmods.dev/badge/skills/summersec/sumsec-skills/ponytail-help/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.
<a href="https://agentmods.dev/skills/summersec/sumsec-skills/ponytail-help"><img src="https://agentmods.dev/badge/skills/summersec/sumsec-skills/ponytail-help.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00049 | $0.00402 |
| Opus 5 | $0.00024 | $0.00201 |
| Sonnet 5 | $0.00010 | $0.00080 |
| Haiku 4.5 | $0.00005 | $0.00040 |
Grade A, and why
ponytail-help 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 8d 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.
What it actually says
Ponytail Help
Display this reference card when invoked. One-shot, do NOT change mode or persist anything.
Levels
| Level | Trigger | What changes |
|---|---|---|
| Lite | /ponytail lite |
Build what's asked, but name the lazier alternative in one line. |
| Full | /ponytail |
YAGNI -> reuse -> stdlib -> native -> one line -> minimum. Default. |
| Ultra | /ponytail ultra |
YAGNI extremist. Deletion before addition. Challenges requirements before building. |
Skills
| Skill | Trigger | What it does |
|---|---|---|
| ponytail | /ponytail |
Lazy mode itself. Simplest correct solution. |
| ponytail-review | /ponytail-review |
Over-engineering review for a diff. |
| ponytail-audit | /ponytail-audit |
Repo-wide over-engineering audit. |
| ponytail-help | /ponytail-help |
This card. |
Codex commonly invokes these as @ponytail, @ponytail-review,
@ponytail-audit, and @ponytail-help.
Deactivate
Say "stop ponytail" or "normal mode".
Configure Default Mode
Environment variable:
export PONYTAIL_DEFAULT_MODE=ultra
Config file:
{ "defaultMode": "lite" }
Resolution order: env var -> config file -> full.
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.
- 8d ago First seen · 54 lines · 49 tokens per session scan A a8b61b628e87
ponytail-help is a skill published in the GitHub repository SummerSec/SumSec-Skills (8 stars, last pushed 24d ago), licensed Apache-2.0. It adds 49 tokens to every session and 402 once invoked, about $0.0002 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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