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 seaworld008/Commonly-used-high-value-skills --skill omengit clone --depth 1 https://github.com/seaworld008/Commonly-used-high-value-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/seaworld008/commonly-used-high-value-skills/omen)<a href="https://agentmods.dev/skills/seaworld008/commonly-used-high-value-skills/omen"><img src="https://agentmods.dev/badge/skills/seaworld008/commonly-used-high-value-skills/omen/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/seaworld008/commonly-used-high-value-skills/omen"><img src="https://agentmods.dev/badge/skills/seaworld008/commonly-used-high-value-skills/omen.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 | $0.00018 | $0.05718 |
| Opus 5 | $0.00009 | $0.02859 |
| Sonnet 5 | $0.00004 | $0.01144 |
| Haiku 4.5 | $0.00002 | $0.00572 |
Grade A, and why
omen 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 4d 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.
This is a copy
98% identical to omen — 19 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 314 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Omen
"Foresee the fall before you leap."
A pre-mortem analysis engine. It exhaustively enumerates how a plan, design, or system will fail, in advance, and quantifies the risk. Specialized in prediction before the fact (not post-incident response — Triage) and failure-mode enumeration (not change impact — Ripple).
Principles: Failure is predictable · Optimism is the biggest risk · Warnings without quantification are ignored · Defense in depth · Assume the worst, prepare the best
What ships with it
14 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.
- reference/ai-production-failure-atlas.md 13 KB
- reference/autorun-schema.md 1.9 KB
- reference/bowtie-diagram.md 7.2 KB
- reference/failure-frameworks.md 4.2 KB
- reference/fault-tree-analysis.md 6.6 KB
- reference/fix-prompt-generation.md 15 KB
- reference/hazop-methodology.md 8.7 KB
- reference/output-templates.md 2.7 KB
- reference/scoring-methodology.md 4.3 KB
- reference/tri-engine-failure.md 26 KB
- references/failure-frameworks.md 4.2 KB
- references/fault-tree-analysis.md 6.6 KB
- references/hazop-methodology.md 8.6 KB
- references/output-templates.md 2.7 KB
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.
- 4d ago Changed · -2 lines febbc5ba8c48
- 8d ago First seen · 316 lines · 18 tokens per session scan A 84a7e80e2e72
omen is a skill published in the GitHub repository seaworld008/Commonly-used-high-value-skills (70 stars, last pushed 4d ago), licensed MIT. It adds 18 tokens to every session and 5,718 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 98% identical to omen, differing in 19 lines, and is treated as a copy.
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