Official agent skill

Matter Briefing

by anthropics in anthropics/claude-for-legal

Deep briefing on one matter — current posture, what's changed, next deadline, open questions, and a risk re-assessment check, ready before a GC update or outside counsel call.

OfficialApache-2.0Auto-check passed

Install Matter Briefing

skills CLI
$ npx skills add anthropics/claude-for-legal --skill matter-briefing -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install anthropics/claude-for-legal matter-briefing --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/anthropics/claude-for-legal.git skills-src && mkdir -p .claude/skills && cp -r skills-src/litigation-legal/skills/matter-briefing .claude/skills/matter-briefing && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
matter-briefing
GitHub stars
9.6k
Used in
3 other repos
Token cost
~1.2k tokens
SKILL.md length
343 words
Files
1
Skills in repo
147
Repo updated
First seen
Licence
Apache-2.0

At a glance

Deep briefing on one matter — current posture, what's changed, next deadline, open questions, and a risk re-assessment check, ready before a GC update or outside counsel call.

  • Works in 5 steps: Load… → Follow the workflow and reference below. → Read… → …
  • The user says brief me on [matter]
  • SKILL.md covers Purpose, Load context, Input and The briefing, plus 4 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Matter Briefing is an agent skill from anthropics/claude-for-legal, published by the product's own GitHub organization. Deep briefing on one matter — current posture, what's changed, next deadline, open questions, and a risk re-assessment check, ready before a GC update or outside counsel call. Use when the user says "brief me on [matter]", "where are we on [matter]", or needs a read on a specific matter.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: A suite of plugins for legal workflows. The licence is Apache-2.0.

When your agent uses it

  • The user says brief me on [matter]
  • Where are we on [matter]
  • Needs a read on a specific matter

Example prompts

  • “brief me on [matter]”
  • “where are we on [matter]”
  • “/matter-briefing”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Load ~/.claude/plugins/config/claude-for-legal/litigation-legal/CLAUDE.md → risk calibration + relevant stakeholders.
  2. Follow the workflow and reference below.
  3. Read ~/.claude/plugins/config/claude-for-legal/litigation-legal/matters/[slug]/matter.md +…
  4. Produce briefing: current posture, what's changed since last update, next deadline, open questions, risk re-assessment check ("does the…
  5. Flag staleness: if last_updated > 30 days, say so.

What it can do on your machine

Read from SKILL.md and the folder at commit 4a6c651. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Matter Briefing loads about 1.2k tokens when it runs. Until then it costs about 76 tokens; SKILL.md has 343 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~76
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from anthropics/claude-for-legal at commit 4a6c651, republished under its Apache-2.0 licence (© anthropics). 343 words, ~1,214 tokens.

Download SKILL.mdSave it as .claude/skills/matter-briefing/SKILL.md (or your agent's skills folder).
name
matter-briefing
description
Deep briefing on one matter — current posture, what's changed, next deadline, open questions, and a risk re-assessment check, ready before a GC update or outside counsel call. Use when the user says "brief me on [matter]", "where are we on [matter]", or needs a read on a specific matter.
argument-hint
[slug]

/matter-briefing

  1. Load ~/.claude/plugins/config/claude-for-legal/litigation-legal/CLAUDE.md → risk calibration + relevant stakeholders.
  2. Follow the workflow and reference below.
  3. Read ~/.claude/plugins/config/claude-for-legal/litigation-legal/matters/[slug]/matter.md + ~/.claude/plugins/config/claude-for-legal/litigation-legal/matters/[slug]/history.md + log row from _log.yaml.
  4. Produce briefing: current posture, what's changed since last update, next deadline, open questions, risk re-assessment check ("does the risk: field still reflect reality?").
  5. Flag staleness: if last_updated > 30 days, say so.

Matter Briefing

Purpose

Give the counsel a clean read on one matter in the time it takes to walk to a conference room. Current posture, what's changed, what's next, what's worth reconsidering.

Load context

  • ~/.claude/plugins/config/claude-for-legal/litigation-legal/matters/_log.yaml — structured row
  • ~/.claude/plugins/config/claude-for-legal/litigation-legal/matters/[slug]/matter.md — narrative intake
  • ~/.claude/plugins/config/claude-for-legal/litigation-legal/matters/[slug]/history.md — event log
  • ~/.claude/plugins/config/claude-for-legal/litigation-legal/CLAUDE.md — risk calibration (so "risk: high" means something specific, not generic)

Conflicts gate — unbypassable. Before briefing, check _log.yaml for the matter slug. If the matter is not in _log.yaml, refuse and route:

"I don't see [matter slug] in the matter log. Run /litigation-legal:matter-intake first so the conflicts check runs and the matter workspace is set up. I won't build a briefing on a matter that hasn't been intaken — the conflicts check is the gate."

Input

Slug (required). If ambiguous or missing, ask the user to pick from a list of active matters.

The briefing

markdown
[WORK-PRODUCT HEADER — per plugin config ## Outputs — differs by role; see `## Who's using this`]

# [Matter Name] — Briefing as of [today]

**Status:** [status / stage]
**Risk:** [rating] ([severity] × [likelihood])
**Materiality:** [category]
**Outside counsel:** [firm — lead]
**Last updated:** [date] [flag ⚠️ STALE if >30d]
**Conflicts:** [status — flag ⚠️ if `pending` or `not-run`]

---

## One-paragraph summary

[Current posture. What are we doing and why. Name the pivot fact if one is captured.]

## What's changed recently

[Last 3-5 entries from history.md, most recent first. If history is thin, say so.]

## What's next

- **Immediate deadline:** [next_deadline + what it is]
- **Upcoming milestones:** [anything dated in matter.md or recent history]
- **Decisions pending:** [open questions flagged in matter.md]

## Exposure

[Range + any change since intake. If reserved, current reserve + whether recalibration is overdue.]

## Internal owners

[Who's looped in; whether anyone should be looped in and isn't]

## Risk re-assessment check

*A prompt, not an answer.*

- Does `risk: [rating]` still feel right, or has the case moved?
- Does `materiality: [category]` still match? (New facts might push toward reserve or disclosure.)
- Any new stakeholder the matter needs (e.g., CISO becomes relevant after a discovery development)?

## Open questions

[From matter.md and anything unresolved in history]

## For the conversation

[If user specified a purpose — "brief me before the call with outside counsel" — tailor the final section: questions to ask, decisions to get, updates to extract. If no purpose given, omit this section.]

Staleness

If last_updated > 30 days ago: flag at the top AND suggest running /litigation-legal:matter-update [slug] after the meeting to capture whatever's discussed.

Tone

This is not marketing. Say what's known; flag what's not. If a matter has thin history and was just opened, the briefing is short — and that's correct. Don't pad.

Close with the next-steps decision tree

End with the next-steps decision tree per CLAUDE.md ## Outputs. Customize the options to what this skill just produced — the five default branches (draft the X, escalate, get more facts, watch and wait, something else) are a starting point, not a lock-in. The tree is the output; the lawyer picks.

What this skill does not do

  • Predict outcomes. Risk rating is a captured judgment, not a forecast.
  • Recommend strategy. Surfaces questions; the counsel answers them.
  • Re-triage. If the user wants to re-triage, that's an /matter-update with field changes — this skill reads, doesn't write.

© anthropics, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in litigation-legal/skills/matter-briefing of anthropics/claude-for-legal.

Open the folder on GitHubat commit 4a6c651

Used in 3 other repositories

We found 3 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 3 other GitHub owners. This page covers the copy in anthropics/claude-for-legal, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Matter Briefing next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Matter Briefing compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Matter Briefing this skillanthropics/claude-for-legal9.6k3 repos~1.2kAutomated safety check: PassApache-2.0
Tw Legal RAGaa0101181514/tw-legal-rag328—~580Automated safety check: PassCustom licence
Design Award SearchSeanJ1ang/design-judge-skills712—~3kAutomated safety check: PassApache-2.0
China Lawyer AnalystCSlawyer1985/china-lawyer-analyst196—~3.3kAutomated safety check: PassNone
Free Willsyahiidkamil/Software-Engineer-AI-Agent-Atlas401—~3.4kAutomated safety check: PassNone
Billing And Litigation BudgetTHUYRan/Legal-Skills-Chinese874—~5kAutomated safety check: PassNone

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Questions about Matter Briefing

What does Matter Briefing do?

Deep briefing on one matter — current posture, what's changed, next deadline, open questions, and a risk re-assessment check, ready before a GC update or outside counsel call. Matter Briefing is an agent skill from anthropics/claude-for-legal, published by the product's own GitHub organization. Deep briefing on one matter — current posture, what's changed, next deadline, open questions, and a risk re-assessment check, ready before a GC update or outside counsel call.

When should I use Matter Briefing?

Matter Briefing fits situations like: the user says brief me on [matter]; where are we on [matter]; needs a read on a specific matter.

How do I install Matter Briefing in Claude Code?

Run `npx skills add anthropics/claude-for-legal --skill matter-briefing -a claude-code`. Or copy the skill folder (litigation-legal/skills/matter-briefing in anthropics/claude-for-legal) into .claude/skills/matter-briefing in your project. Claude Code loads it when a task matches its description.

How do I install Matter Briefing in Codex?

Run `npx skills add anthropics/claude-for-legal --skill matter-briefing -a codex`. Or copy the skill folder (litigation-legal/skills/matter-briefing in anthropics/claude-for-legal) into .agents/skills/matter-briefing in your project. Codex loads it when a task matches its description.

Can I use Matter Briefing in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add anthropics/claude-for-legal --skill matter-briefing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/matter-briefing, .gemini/skills/matter-briefing, .github/skills/matter-briefing and .opencode/skills/matter-briefing in your project.

What does Matter Briefing need to run?

SKILL.md names no scripts, command-line tools or credentials: Matter Briefing is instructions for the agent only.

Does Matter Briefing access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Matter Briefing safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Matter Briefing use?

Matter Briefing is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Matter Briefing use?

About 1.2k tokens (SKILL.md is roughly 4.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Matter Briefing?

Skills that share tags, products or a category with Matter Briefing: Tw Legal RAG (aa0101181514/tw-legal-rag, 328 stars), Design Award Search (SeanJ1ang/design-judge-skills, 712 stars), China Lawyer Analyst (CSlawyer1985/china-lawyer-analyst, 196 stars) and Free Will (syahiidkamil/Software-Engineer-AI-Agent-Atlas, 401 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Matter Briefing?

anthropics (a GitHub organization, an official publisher) maintains it in anthropics/claude-for-legal, which has 9,633 GitHub stars. The repository holds 147 skills in this directory. The repository was last updated on September 29, 2026.

Source: anthropics/claude-for-legal on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.