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 agentmods add skills/nrdxp/predicate/quartonpx skills add nrdxp/predicate --skill quartogit clone --depth 1 https://github.com/nrdxp/predicateWhat 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 | $0.00091 | $0.03360 |
| Opus 5 | $0.00046 | $0.01680 |
| Sonnet 5 | $0.00018 | $0.00672 |
| Haiku 4.5 | $0.00009 | $0.00336 |
Grade A, and why
quarto 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 yesterday.
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 — 445 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Quarto (.qmd) Authoring Rules
Quarto is a superset of Pandoc Markdown. It prioritizes semantic structure over visual formatting.
Golden Rule: Never use raw HTML tags (
<div>,<img>,<br>) unless absolutely necessary. Use Pandoc Fenced Divs and Spans.
Official Documentation: quarto.org/docs is the authoritative reference. Consult it for edge cases, advanced features, or when this skill lacks specifics.
1. Block Structure (Fenced Divs)
Quarto uses Fenced Divs (:::) to define layout, callouts, and structural blocks. More colons (:::::) enable nesting.
Callouts (Alerts)
Convert standard Markdown blockquotes (>) into semantic callouts.
| Type | Syntax | Use Case |
|---|---|---|
| Note | ::: {.callout-note} |
Non-critical info |
| Tip | ::: {.callout-tip} |
Best practices/optimizations |
| Important | ::: {.callout-important} |
Key constraints |
| Warning | ::: {.callout-warning} |
Failure modes |
| Caution | ::: {.callout-caution} |
Data loss risks |
Features:
- Title: Use a
##heading inside, or thetitle="..."attribute. - Collapse: Add
collapse="true"for expandable callouts (collapsed by default). - Appearance:
appearance="simple"orappearance="minimal"for alternate styles. - Icons:
icon=falseto suppress the default icon.
::: {.callout-caution collapse="true" appearance="simple"}
## Warning Title
Collapsible content.
:::
Multi-Column Layouts
Do not use HTML tables or CSS grids for layout. Use Quarto layout divs.
:::: {.columns}
::: {.column width="40%"}
Left content (e.g., text)
:::
::: {.column width="60%"}
Right content (e.g., image or code)
:::
::::
Tabsets
Group content into switchable tabs using the .panel-tabset class.
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.
- yesterday First seen · 445 lines · 91 tokens per session scan A 2efd3aeea57d
quarto is a skill published in the GitHub repository nrdxp/predicate (10 stars, last pushed 8d ago), licensed MIT. It adds 91 tokens to every session and 3,360 once invoked, about $0.0005 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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