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[DEPRECATED] Plain-Language Letters → see /client-letter and /status client · anthropics | DecimalAI

Registry skillby anthropics

[DEPRECATED] Plain-Language Letters → see /client-letter and /status client

anthropics/plain-language-letters

Source anthropics/claude-for-legal ↗License Apache-2.0

Reference: DEPRECATED — use `/client-letter` for routine correspondence or `/status client` for substantive updates. Split into two more focused skills during the v2 rebuild. Kept as a redirect for migration.

SkillScore95Maintained

Automatic

Writing & Editing pack

Last verified 8/11/2026

What it changes

Passed 21 of 22 test cases with the skill, and 3 of 22 without it.

Without skill14%

With skill95%

Checks it passed that the model alone missed

Points to /client-letter
Points to /status client
Directs to /client-letter

and 9 more in the full report

18 fixed3 passed either way1 still failing0 broke

Pass-rate lift: +82 pp
Tokens: -44%
Agent turns: 0%
Response time: -56%

Model gemini-3.6-flashMeasured 8/11/2026v121 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/anthropics-plain-language-letters/SKILL.md https://app.decimal.ai/s/anthropics-plain-language-letters/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add anthropics-plain-language-letters, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/anthropics-plain-language-letters/ and pins it in .decimal/skills.lock

decimalai skills add anthropics-plain-language-letters

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/anthropics-plain-language-letters/SKILL.md https://app.decimal.ai/s/anthropics-plain-language-letters/SKILL.md

Raw file: /s/anthropics-plain-language-letters/SKILL.md ↗ · machine-readable summary at /s/anthropics-plain-language-letters.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 18 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 18

Prompt

I am preparing a major quarterly update for the executive team at Apex Corp explaining our defense strategy, recent deposition outcomes, and risk exposure. Which command or location should I use for this client update?

What was checked, without and with the skill
Checked	Without skill	With skill
Directs the user to /status client or skills/status/	Missed	Passed

case-04 · gemini-3.6-flash · 8/11/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md13 linessingle file

[DEPRECATED] Plain-Language Letters → see `/client-letter` and `/status client`

This skill was split during the v2 rebuild:

Routine correspondence (appointment confirms, document requests, brief "we filed it" updates) → skills/client-letter/ — use /client-letter [type]
Substantive client status updates → skills/status/ in client-facing mode — use /status client

Both apply the plain-language standards (reading level, no jargon) from CLAUDE.md.

See the respective SKILL.md files for full workflows.

Track record

Benchmark

21 / 22

test cases passed, vs 3 / 22 without

Adoption

Users: 1
Times used: 13

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

anthropics / claude-for-legal

legal-clinic/skills/plain-language-letters/SKILL.md

View on GitHub ↗

License Apache-2.0Imported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

anthropics/client-letterRoutine client correspondence from templates — appointment confirmations, document requests, brief "we filed it" updates. Plain language, required elements, supervision routing. NOT substantive advice. Use when a student needs to send routine correspondence, an appointment confirmation, a document request letter, or a brief status note to a client.Close match+50 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.