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 script-development/claude --skill shepardgit clone --depth 1 https://github.com/script-development/claudeWrote 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/script-development/claude/shepard)<a href="https://agentmods.dev/skills/script-development/claude/shepard"><img src="https://agentmods.dev/badge/skills/script-development/claude/shepard/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/script-development/claude/shepard"><img src="https://agentmods.dev/badge/skills/script-development/claude/shepard.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 | $0.00160 | $0.09470 |
| Opus 5.5 | $0.00064 | $0.03788 |
| Sonnet 5.5 | $0.00032 | $0.01894 |
| Haiku 4.5 | $0.00016 | $0.00947 |
Grade C, and why
shepard scanned grade C with 1 finding 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 20d 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.
Tells the agent never to refusehighAnti-refusal
Suppressing the ability to decline removes a core safety control; a later harmful request then succeeds.
repo that hasn't written one: run on the defaults and say so in the hand-back. Never refuse a The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
7 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.
- 20d ago Changed · +18 lines 6f49b91f6790
- 21d ago Changed · +7 lines 1faee8cd190e
- 23d ago Changed · +37 lines 2d3483c6effb
- 25d ago Changed · +17 lines b78926bdc3fb
- 1mo ago Changed · -64 lines · -105 tokens per session 47e11ea76f6f
- 1mo ago Changed · +25 lines 95e61c6feab5
- 1mo ago Changed · +11 lines b5ce7212219d
- 1mo ago First seen · 589 lines · 265 tokens per session scan C 93877709d7d2
shepard is a skill published in the GitHub repository script-development/claude (3 stars, last pushed 2d ago), with no licence file. It adds 160 tokens to every session and 9,470 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it C with 1 finding (tells the agent never to refuse). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.
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