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 oscal-compass-lab/compliance-trestle-skills --skill trestle-task-systemgit clone --depth 1 https://github.com/oscal-compass-lab/compliance-trestle-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/oscal-compass-lab/compliance-trestle-skills/trestle-task-system)<a href="https://agentmods.dev/skills/oscal-compass-lab/compliance-trestle-skills/trestle-task-system"><img src="https://agentmods.dev/badge/skills/oscal-compass-lab/compliance-trestle-skills/trestle-task-system/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/oscal-compass-lab/compliance-trestle-skills/trestle-task-system"><img src="https://agentmods.dev/badge/skills/oscal-compass-lab/compliance-trestle-skills/trestle-task-system.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 | $0.00068 | $0.03771 |
| Opus 5 | $0.00034 | $0.01886 |
| Sonnet 5 | $0.00014 | $0.00754 |
| Haiku 4.5 | $0.00007 | $0.00377 |
Grade A, and why
trestle-task-system 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 12d 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 — 340 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Trestle Task System
The trestle task system converts external data formats into OSCAL documents.
It also converts OSCAL documents into external formats.
Supported formats include CSV, XLSX, XCCDF, Tanium, and CIS benchmarks.
Configure tasks in config.ini sections.
Run a task with trestle task <name>.
Available Tasks
Into OSCAL
| Task Name | Input Format | Output OSCAL Type |
|---|---|---|
csv-to-oscal-cd |
CSV | Component Definition |
xlsx-to-oscal-cd |
XLSX | Component Definition |
xlsx-to-oscal-profile |
XLSX | Profile |
xccdf-result-to-oscal-ar |
XCCDF XML results | Assessment Results |
tanium-result-to-oscal-ar |
Tanium JSON results | Assessment Results |
cis-xlsx-to-oscal-catalog |
CIS benchmark XLSX | Catalog |
cis-xlsx-to-oscal-cd |
CIS benchmark XLSX | Component Definition |
ocp4-cis-profile-to-oscal-catalog |
OCP4 CIS profile YAML | Catalog |
ocp4-cis-profile-to-oscal-cd |
OCP4 CIS profile YAML | Component Definition |
From OSCAL
| Task Name | Input OSCAL Type | Output Format |
|---|---|---|
oscal-catalog-to-csv |
Catalog | CSV |
oscal-profile-to-osco-profile |
Profile | OSCO YAML |
Configuration Format
Configure tasks in .trestle/config.ini with INI-style sections:
[task.csv-to-oscal-cd]
title = My Component Definition
version = 1.0
csv-file = data/controls.csv
output-dir = component-definitions/my-component
output-overwrite = true
The section name follows the pattern [task.<task-name>].
Task-Specific Configuration
csv-to-oscal-cd
This task is used often. It converts a CSV file with control mappings into an OSCAL Component Definition.
Required keys:
title: Component definition titleversion: Component definition versioncsv-file: Path to the CSV fileoutput-dir: Output directory for the generated OSCAL JSON
Optional keys:
component-definition: Path to an existing component-definition to merge withclass.column-name: Class to associate with a CSV column nameoutput-overwrite:true(default) orfalsevalidate-controls:on,warn, oroff(default)
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.
- 12d ago First seen · 340 lines · 68 tokens per session scan A 95eb99987e8b
trestle-task-system is a skill published in the GitHub repository oscal-compass-lab/compliance-trestle-skills (16 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 68 tokens to every session and 3,771 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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