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 uk-agents/uk-legal-plugins --skill case-briefgit clone --depth 1 https://github.com/uk-agents/uk-legal-pluginsWrote 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/uk-agents/uk-legal-plugins/case-brief)<a href="https://agentmods.dev/skills/uk-agents/uk-legal-plugins/case-brief"><img src="https://agentmods.dev/badge/skills/uk-agents/uk-legal-plugins/case-brief/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/uk-agents/uk-legal-plugins/case-brief"><img src="https://agentmods.dev/badge/skills/uk-agents/uk-legal-plugins/case-brief.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 | $0.00056 | $0.01923 |
| Opus 5 | $0.00028 | $0.00962 |
| Sonnet 5 | $0.00011 | $0.00385 |
| Haiku 4.5 | $0.00006 | $0.00192 |
Grade A, and why
case-brief 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 7d 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 — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/law-student-uk:case-brief
- Load
~/.claude/plugins/config/uk-legal-plugins/law-student-uk/CLAUDE.md→ outline/brief preferences. - Apply the workflow below.
- Brief in the student's format. If drill-me mode: ask the student to state the holding first.
- All case citations in OSCOLA format: Case Name [year] report abbreviation page — e.g., Donoghue v Stevenson [1932] AC 562.
Purpose
A case brief is a tool for remembering what a case does. This skill makes one in your format — the format you'll actually use in your outline.
UK court hierarchy and citation
Court of Appeal and Supreme Court decisions are binding. Cases should be identified by their proper citation:
- UK Supreme Court (UKSC): R (Miller) v Secretary of State for Exiting the European Union [2017] UKSC 5 — cited as
[year] UKSC [number] - Court of Appeal (CA/EWCA): Williams v Roffey Bros & Nicholls (Contractors) Ltd [1991] 1 QB 1
- High Court (HC/EWHC): OBG Ltd v Allan [2007] UKHL 21 (pre-UKSC House of Lords; now UKSC)
- House of Lords (HL): Donoghue v Stevenson [1932] AC 562 (pre-October 2009 HoL decisions)
- Privy Council (PC): persuasive but not binding on English courts
Scotland: Smith v Bank of Scotland 1997 SC (HL) 111; Court of Session reports cite as [year] SC / SLT / SCLR. Faculty of Advocates decisions in the Inner House or Outer House.
BAILII (www.bailii.org) is the free database for UK case law. All judgments from the Supreme Court, Court of Appeal, and High Court are available. Check BAILII before citing from memory.
Confidence discipline
Case briefs state holdings, rules, and reasoning. Getting them wrong turns your outline into a false map. The rule for this skill:
- If you paste the case text: I extract holding/rule/reasoning from what's in front of me. Confident.
- If you only give a case name: I brief from knowledge. Worth a lot less. I flag every line I'm not sure about with
[UNCERTAIN: specific reason], and I strongly recommend you confirm against BAILII or your casebook before putting the brief in your outline. If I don't know the case well enough, I say so. - If the case has famous-but-contested interpretations: I give the majority read and
[VERIFY: check your casebook and lecturer's framing].
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.
- 7d ago First seen · 128 lines · 56 tokens per session scan A ca2967073730
case-brief 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 56 tokens to every session and 1,923 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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