yocto-security-sbom

yocto-security-sbom is a skill for Claude Code from Higangssh/yocto-agent-skills. It costs 73 tokens per session (497 once invoked), scanned A, original, MIT.

A review guide for Yocto, a Linux build system for embedded devices, focused on software licenses and security records such as SBOMs, which list the components in a build.

In plain words
What is it for?
Reviewing recipe license metadata, generating or checking SBOMs and license manifests, investigating CVEs, handling commercial licenses, and meeting source-archiving obligations.
Why use it?
It helps explain license and CVE-checking failures and avoids incorrect release or compliance settings.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the yocto-agent-skills plugin — 8 skills shipped together

Good fit Reviewing recipe license metadata, generating or checking SBOMs and license manifests, investigating CVEs, handling commercial licenses, and meeting source-archiving obligations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/higangssh/yocto-agent-skills/yocto-security-sbom
Install

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.

Any agent
npx skills add Higangssh/yocto-agent-skills --skill yocto-security-sbom
Clone the repo
git clone --depth 1 https://github.com/Higangssh/yocto-agent-skills

Made for: Claude Code.

Or install yocto-agent-skills, the plugin that ships this one along with the rest of its 8 skills.

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 yocto-security-sbom

README.md
[![agentmods](https://agentmods.dev/badge/skills/higangssh/yocto-agent-skills/yocto-security-sbom/github.svg)](https://agentmods.dev/skills/higangssh/yocto-agent-skills/yocto-security-sbom)
Your own site
<a href="https://agentmods.dev/skills/higangssh/yocto-agent-skills/yocto-security-sbom"><img src="https://agentmods.dev/badge/skills/higangssh/yocto-agent-skills/yocto-security-sbom/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.

agentmods 80×15 button for yocto-security-sbom

Your own site · 80×15
<a href="https://agentmods.dev/skills/higangssh/yocto-agent-skills/yocto-security-sbom"><img src="https://agentmods.dev/badge/skills/higangssh/yocto-agent-skills/yocto-security-sbom.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 73 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 497 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 $0.00073 $0.00497
Opus 5 $0.00036 $0.00249
Sonnet 5 $0.00015 $0.00099
Haiku 4.5 $0.00007 $0.00050

Measured 12d ago against content hash f6d4b9ea0f17, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

yocto-security-sbom 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.

skills/yocto-security-sbom/SKILL.md · 58 lines

What it actually says

Yocto Security SBOM

Use this skill for security, license, CVE, SBOM, and compliance workflows. Treat class names and output paths as release-sensitive.

Evidence

Ask for or inspect:

target Yocto release
recipe LICENSE and LIC_FILES_CHKSUM
license QA error
image/license manifest output
SPDX/SBOM configuration and output
CVE check configuration and reports
archiver/copyleft configuration
commercial license policy

Useful commands:

bitbake -e <recipe> | rg '^(LICENSE|LIC_FILES_CHKSUM|LICENSE_FLAGS|LICENSE_FLAGS_ACCEPTED|INCOMPATIBLE_LICENSE|CVE|SPDX|ARCHIVER)[:=]'
bitbake -c populate_lic <recipe>
bitbake <image>
find tmp/deploy -maxdepth 4 -iname '*spdx*' -o -path '*licenses*'

Review Rules

  • LIC_FILES_CHKSUM is mandatory unless LICENSE = "CLOSED".
  • License checksum mismatch means upstream license text changed; inspect before updating the checksum.
  • Keep commercial license acceptance explicit and narrow.
  • Verify current release SBOM/CVE class names before recommending create-spdx, CVE classes, or output paths.
  • Use archiver/copyleft flows when source offer obligations matter.
  • Do not confuse build-time DEPENDS with packages included in final image license manifests.

References

Output

Answer with:

  1. license/security artifact being debugged
  2. release-sensitive class or variable to verify
  3. exact metadata or policy fix
  4. validation command and expected artifact
  5. compliance caveat if legal interpretation is required
Files

What ships with it

3 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.

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 · 58 lines · 73 tokens per session scan A f6d4b9ea0f17

Subscribe to this mod's changes

yocto-security-sbom is a skill published in the GitHub repository Higangssh/yocto-agent-skills (8 stars, last pushed 1mo ago), licensed MIT. It adds 73 tokens to every session and 497 once invoked, about $0.0004 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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