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 client-lettergit 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/client-letter)<a href="https://agentmods.dev/skills/uk-agents/uk-legal-plugins/client-letter"><img src="https://agentmods.dev/badge/skills/uk-agents/uk-legal-plugins/client-letter/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/client-letter"><img src="https://agentmods.dev/badge/skills/uk-agents/uk-legal-plugins/client-letter.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 | $0.00071 | $0.02096 |
| Opus 5.5 | $0.00028 | $0.00838 |
| Sonnet 5.5 | $0.00014 | $0.00419 |
| Haiku 4.5 | $0.00007 | $0.00210 |
Grade A, and why
client-letter 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 1mo 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 — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/legal-clinic-uk:client-letter
- Load
~/.claude/plugins/config/uk-legal-plugins/legal-clinic-uk/CLAUDE.md→ plain-language standards, supervision style, clinic contact info. - Use the templates and workflow below.
- Match type to template. Plain-English check. SRA client care sign-off.
- Output with AI-assisted label, supervision routing.
Scope: routine only. Substantive advice → /legal-clinic-uk:status client or a conversation with the supervisor.
/legal-clinic-uk:client-letter appointment
/legal-clinic-uk:client-letter doc-request
Client Letter: Routine Correspondence
Purpose
UK law school clinics send a lot of routine correspondence: "your appointment is Tuesday at 2pm," "please bring your tenancy agreement," "we filed your ET1." This skill handles those from templates so students aren't typing the same letter every week.
Scope: routine only. Substantive advice, bad news, case strategy — those are /legal-clinic-uk:status client or a conversation with the supervisor, not a template letter.
Client care obligations. Under the SRA Code of Conduct 2019, clients have a right to receive clear information about who is dealing with their matter, who is supervising, how to make a complaint, and the basis of the service provided. Even routine letters from a law school clinic should comply with the spirit of these obligations. The templates below include the required sign-off identifying the student and supervising solicitor/barrister. [SRA-CODE]
Load context
~/.claude/plugins/config/uk-legal-plugins/legal-clinic-uk/CLAUDE.md → plain-language standards, supervision style, clinic contact info.
Pedagogy check
Read the supervisor guide for this practice area at ~/.claude/plugins/config/uk-legal-plugins/legal-clinic-uk/guides/<practice-area>.md. Check the pedagogy_posture setting:
guide(default): Produce the structure and the checklist. Ask the student to draft each section. Give feedback.assist: Produce the letter. Flag items for student review.teach: Don't produce the letter. Ask the student to draft it. Give feedback.
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.
- 1mo ago First seen · 171 lines · 71 tokens per session scan A 4928f3ce7e96
client-letter is a skill published in the GitHub repository uk-agents/uk-legal-plugins (14 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 71 tokens to every session and 2,096 once invoked, about $0.0003 per session on Opus 5.5. 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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