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 Neeeophytee/agent-stylebooks --skill 18f-contentgit clone --depth 1 https://github.com/Neeeophytee/agent-stylebooksWrote 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/neeeophytee/agent-stylebooks/18f-content)<a href="https://agentmods.dev/skills/neeeophytee/agent-stylebooks/18f-content"><img src="https://agentmods.dev/badge/skills/neeeophytee/agent-stylebooks/18f-content/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/neeeophytee/agent-stylebooks/18f-content"><img src="https://agentmods.dev/badge/skills/neeeophytee/agent-stylebooks/18f-content.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00063 | $0.00656 |
| Opus 5 | $0.00032 | $0.00328 |
| Sonnet 5 | $0.00013 | $0.00131 |
| Haiku 4.5 | $0.00006 | $0.00066 |
Grade A, and why
18f-content 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
18F content
Design content as part of the service. Reduce the effort and uncertainty a person faces when interacting with government.
Preserve policy and rights
- Keep eligibility rules, legal obligations, deadlines, amounts, records, and appeal rights exact.
- Do not turn an agency preference into a legal requirement.
- Separate the common path, exceptions, and discretionary decisions.
- Flag any wording change that may require policy or legal review.
Map the service task
- Identify what the person is trying to accomplish and what may be at stake.
- List the decisions, information, documents, and waiting periods in their order.
- Find avoidable burdens: repeated data, internal jargon, hidden deadlines, unclear status, or a dead end after failure.
- Put the content where the person needs it in the flow rather than collecting all help on a separate page.
- Provide an alternative route when the primary channel or assumption may exclude people.
Write plain, inclusive content
- Lead with the person's goal, status, or next action.
- Use common words, active voice, and concrete verbs.
- Address the person as
you. Name the agency or system when it acts. - Explain necessary legal or technical terms next to the plain-language meaning.
- Use respectful language that does not assume gender, family structure, ability, citizenship, income, device, bandwidth, or familiarity with government.
- Ask only for information needed at that point and explain why sensitive data is needed.
- Make help and error messages describe recovery, not merely failure.
Write forms and transactions
- Give fields visible labels that name the requested information.
- Use hint text for format, scope, or reason, not to repeat the label.
- Put validation near the field and say how to fix the value.
- Confirm what was submitted, what happens next, how long it may take, and how to correct or follow up on the submission.
- Do not use color, position, or visual wording as the only cue.
What ships with it
2 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.
- 9d ago First seen · 68 lines · 63 tokens per session scan A 11a87a81e0d0
18f-content is a skill published in the GitHub repository Neeeophytee/agent-stylebooks (59 stars, last pushed 16d ago), licensed MIT. It adds 63 tokens to every session and 656 once invoked, about $0.0003 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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