validate-oscal-package

validate-oscal-package is a skill for Claude Code, Cursor from oscal-compass-lab/compliance-trestle-skills. It costs 30 tokens per session (324 once invoked), scanned A, original, Apache-2.0.

A validation workflow for an OSCAL package or Compliance Trestle workspace. OSCAL is a standard format for machine-readable security and compliance documents.

In plain words
What is it for?
Running package or workspace validation, recording results in a report, distinguishing structural checks from actual compliance or authorization, and recommending targeted checks after document changes.
Why use it?
It produces a clear validation report and reports missing tools instead of treating an unchecked package as valid.

Skill for Claude CodeCursor

Written for Claude Code and Cursor: disable-model-invocation in frontmatter, but also installed under .cursor/.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is bash plugins/document-transform/oscal-document-workbench/scripts/validate-oscal-package.sh <path> --output <workspace>/reports/validation-report.json.

Part of the compliance-trestle plugin — 17 skills, 10 agents, 2 hooks, 1 plugin shipped together

Good fit Running package or workspace validation, recording results in a report, distinguishing structural checks from actual compliance or authorization, and recommending targeted checks after document changes.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/oscal-compass-lab/compliance-trestle-skills
agentmods
npx agentmods add skills/oscal-compass-lab/compliance-trestle-skills/validate-oscal-package

Made for: Claude Code, Cursor.

Or install compliance-trestle, the plugin that ships this one along with the rest of its 17 skills, 10 agents, 2 hooks, 1 plugin.

Wrote 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.

agentmods badge for validate-oscal-package

README.md
[![agentmods](https://agentmods.dev/badge/skills/oscal-compass-lab/compliance-trestle-skills/validate-oscal-package/github.svg)](https://agentmods.dev/skills/oscal-compass-lab/compliance-trestle-skills/validate-oscal-package)
Your own site
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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.

agentmods 80×15 button for validate-oscal-package

Your own site · 80×15
<a href="https://agentmods.dev/skills/oscal-compass-lab/compliance-trestle-skills/validate-oscal-package"><img src="https://agentmods.dev/badge/skills/oscal-compass-lab/compliance-trestle-skills/validate-oscal-package.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 324 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00030 $0.00324
Opus 5 $0.00015 $0.00162
Sonnet 5 $0.00006 $0.00065
Haiku 4.5 $0.00003 $0.00032

Measured 12d ago against content hash 4ae257de5fea, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

validate-oscal-package 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.

.cursor/skills/validate-oscal-package/SKILL.md · 48 lines

What it actually says

Validate OSCAL Package

Validate an OSCAL package or Trestle workspace from Cursor.

Read first

  • plugins/document-transform/oscal-document-workbench/commands/validate-oscal-package.md
  • agent-skills/oscal-document-engineering/references/oscal-validation.md
  • commands/workspace/validate.md

Run

bash plugins/document-transform/oscal-document-workbench/scripts/validate-oscal-package.sh <path> --output <workspace>/reports/validation-report.json

For a Trestle workspace without the workbench wrapper:

trestle validate -a

Or use the repository helper:

bash scripts/trestle-workflow.sh validate <workspace>

Report requirements

  • Record validator output or a documented skipped or missing-tool status.
  • Do not claim validation passed if Trestle or OSCAL CLI was unavailable unless the user accepted partial validation.
  • Distinguish structural validation from compliance effectiveness or authorization.

After assemble, import, merge, create, or split

If the user recently ran trestle assemble, trestle import, trestle merge, trestle create, or trestle split, recommend targeted validation such as:

trestle validate -t <type> -n <name>
Changes

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.

  1. 12d ago First seen · 48 lines · 30 tokens per session scan A 4ae257de5fea

Subscribe to this mod's changes

validate-oscal-package 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 30 tokens to every session and 324 once invoked, about $0.0002 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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