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 find-case-by-party-verifygit 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/find-case-by-party-verify)<a href="https://agentmods.dev/skills/uk-agents/uk-legal-plugins/find-case-by-party-verify"><img src="https://agentmods.dev/badge/skills/uk-agents/uk-legal-plugins/find-case-by-party-verify/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/find-case-by-party-verify"><img src="https://agentmods.dev/badge/skills/uk-agents/uk-legal-plugins/find-case-by-party-verify.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 | $0.00116 | $0.01309 |
| Opus 5 | $0.00058 | $0.00655 |
| Sonnet 5 | $0.00023 | $0.00262 |
| Haiku 4.5 | $0.00012 | $0.00131 |
Grade A, and why
find-case-by-party-verify 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.
How it starts
The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/find-case-by-party-verify
- Search TNA Find Case Law:
case_law_search(query="<party names>"). - Pick the right judgment — exact title match first; list by court if multiple.
- Verify:
citations_resolve(neutral_citation=...)for the top candidate. - If resolved, report with
[uk-legal MCP — TNA Find Case Law]tag andtna_uri. - If unresolved, tell the user — never report an unverified citation as confirmed.
Purpose
Find a UK court judgment by party names and verify the neutral citation exists in the TNA Find Case Law corpus before reporting it to the user. The failure mode this prevents: an agent producing a plausible-looking neutral citation from training data that does not actually exist in the official record, or that has wrong details. This skill verifies first and formats second.
Workflow
Source discipline: If a
uk-legal MCPtool returns empty or errored (status:empty/not_found/upstream_validation/ etc.), do NOT supplement from training data or web search. Report the empty result to the user with the tool'snext_steps/detailfield surfaced, and ask for clarifying information (different spelling of a name, a date range, the source URL) rather than fabricating a plausible-looking answer. Empty results are HONEST signal — not a failure mode to paper over.
Step 1 — Search TNA Find Case Law
Call case_law_search(query="<party names>"). The tool returns up to 50 judgments
with neutral_citation, title, court, sitting_date, and tna_uri.
- Use the party names as the query (e.g. "Smith HMRC VAT recovery").
- Do not supplement the query with training-data knowledge about the case — search on what the user provided.
Step 2 — Pick the right judgment
From the results:
- If the user named both parties, look for an exact title match first (X v Y).
- If multiple courts have heard the case (e.g. Court of Appeal and then UKSC), list them in court-of-last-resort order: UKSC → Court of Appeal → High Court.
- If no result is returned, ask the user for a year or a court hint before retrying with a revised query. Do not fabricate a candidate.
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.
- 9d ago First seen · 111 lines · 116 tokens per session scan A ecbf34c584f9
find-case-by-party-verify 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 116 tokens to every session and 1,309 once invoked, about $0.0006 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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