oss-review

oss-review is a skill for Claude Code from uk-agents/uk-legal-plugins. It costs 58 tokens per session (3,467 once invoked), scanned A, original, Apache-2.0.

A review of software licences in dependencies, source code, or a software bill of materials. It checks licence obligations and whether the software can be used with the intended deployment model.

In plain words
What is it for?
Use it to review package manifests, libraries, repositories, SBOMs, or code being prepared for open source release.
Why use it?
It helps uncover copyleft duties, incompatible licences, and packages whose licence status is unclear before software is shipped or published.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: reads .claude/ paths; mentions CLAUDE.md.

Part of the ip-legal-uk plugin — 9 skills, 1 agent shipped together

Good fit Use it to review package manifests, libraries, repositories, SBOMs, or code being prepared for open source release.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/uk-agents/uk-legal-plugins/oss-review
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 uk-agents/uk-legal-plugins --skill oss-review
Clone the repo
git clone --depth 1 https://github.com/uk-agents/uk-legal-plugins

Made for: Claude Code.

Or install ip-legal-uk, the plugin that ships this one along with the rest of its 9 skills, 1 agent.

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 oss-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/uk-agents/uk-legal-plugins/oss-review/github.svg)](https://agentmods.dev/skills/uk-agents/uk-legal-plugins/oss-review)
Your own site
<a href="https://agentmods.dev/skills/uk-agents/uk-legal-plugins/oss-review"><img src="https://agentmods.dev/badge/skills/uk-agents/uk-legal-plugins/oss-review/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 oss-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/uk-agents/uk-legal-plugins/oss-review"><img src="https://agentmods.dev/badge/skills/uk-agents/uk-legal-plugins/oss-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,467 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 $0.00058 $0.03467
Opus 5 $0.00029 $0.01733
Sonnet 5 $0.00012 $0.00693
Haiku 4.5 $0.00006 $0.00347

Measured 9d ago against content hash d6aae62bdef0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

oss-review 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.

ip-legal-uk/skills/oss-review/SKILL.md · 278 lines

How it starts

The opening of the file, as written. The whole thing — 278 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/oss-review

Runs an open source licence compliance check against the practice profile in ~/.claude/plugins/config/uk-legal-plugins/ip-legal-uk/CLAUDE.md. Classifies dependencies by licence family, maps obligations to the deployment model, flags licence-unknown and non-OSI-posing-as-OSS packages, and recommends actions — comply, replace, remove, seek legal review, seek commercial licence.

Instructions

  1. Load ~/.claude/plugins/config/uk-legal-plugins/ip-legal-uk/CLAUDE.md. If placeholders present, stop and prompt: "Run /ip-legal-uk:cold-start-interview first — I need to learn your practice profile (and OSS policy, if any) before I can review." If the practice profile points at an uploaded OSS policy, read that too — it is the source of truth for accepted / review / banned licences on this team.

  2. Establish the scope: a dependency list (package.json, requirements.txt, go.mod, Gemfile, Cargo.toml, pom.xml, SBOM), a single library, or outbound code the team is preparing to open-source.

  3. Establish the deployment model before classifying obligations — SaaS, distributed binary, internal only, or embedded.

  4. Follow the workflow below. In particular:

    • Read the actual licence text, not just metadata.
    • Classify each package into permissive / weak copyleft / strong copyleft / public domain / non-OSI / unknown.
    • Flag licence-unknown as "needs review," not permissive by default.
    • Flag non-OSI source-available licences (SSPL, BUSL, Commons Clause, Elastic Licence, fair-source).
    • For outbound code, check that the chosen outbound licence is compatible with every embedded dependency.
  5. Output the memo per the template below.

  6. Respect the decision posture. When a copyleft-trigger analysis turns on a contested question, flag for attorney review. Anything classified as strong copyleft or licence-unknown goes to a solicitor/attorney before the dependency ships or the code is released.

Examples

/ip-legal-uk:oss-review ~/code/my-project/package.json
/ip-legal-uk:oss-review ~/code/my-project/requirements.txt
/ip-legal-uk:oss-review redis
/ip-legal-uk:oss-review ~/code/my-project

Read the full file on GitHub · 278 lines

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. 9d ago First seen · 278 lines · 58 tokens per session scan A d6aae62bdef0

Subscribe to this mod's changes

oss-review is a skill published in the GitHub repository uk-agents/uk-legal-plugins (9 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 58 tokens to every session and 3,467 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 2026-09-03.

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