Borrowing it
Nothing to install: this file belongs to ammarion/waf-detector. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ammarion/waf-detector/main/.codex/skills/validate-build/SKILL.mdgit clone --depth 1 https://github.com/ammarion/waf-detectorWrote 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/ammarion/waf-detector/validate-build)<a href="https://agentmods.dev/skills/ammarion/waf-detector/validate-build"><img src="https://agentmods.dev/badge/skills/ammarion/waf-detector/validate-build.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 | $0.00023 | $0.00083 |
| Opus 5 | $0.00012 | $0.00042 |
| Sonnet 5 | $0.00005 | $0.00017 |
| Haiku 4.5 | $0.00002 | $0.00008 |
Grade A, and why
validate-build 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 6d 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
This is a thin Codex wrapper.
Source of truth: agent-skills/validate-build/WORKFLOW.md
Read the shared workflow before taking action. If this wrapper and the shared workflow disagree, follow the shared workflow and update the wrapper in the same change.
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.
- 6d ago First seen · 12 lines · 23 tokens per session scan A b855e517e2cc
validate-build is a skill published in the GitHub repository ammarion/waf-detector (116 stars, last pushed yesterday), licensed Apache-2.0. It adds 23 tokens to every session and 83 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 2026-08-30.
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