Claude for Legal is a collection of AI agents, skills, and data connectors for legal work such as commercial, privacy, employment, litigation, regulatory, and intellectual-property matters. Lawyers and legal teams use it through Claude Cowork, Claude Code, or the Claude Managed Agents API, with attorney review required for every output. The catalogue entries are its workflow plugins, skills, agents, and connectors.
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 anthropics/claude-for-legal --skill matter-workspacegit clone --depth 1 https://github.com/anthropics/claude-for-legalWrote 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/anthropics/claude-for-legal/matter-workspace)<a href="https://agentmods.dev/skills/anthropics/claude-for-legal/matter-workspace"><img src="https://agentmods.dev/badge/skills/anthropics/claude-for-legal/matter-workspace/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/anthropics/claude-for-legal/matter-workspace"><img src="https://agentmods.dev/badge/skills/anthropics/claude-for-legal/matter-workspace.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 18 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00082 | $0.02448 |
| Opus 5 | $0.00041 | $0.01224 |
| Sonnet 5 | $0.00016 | $0.00490 |
| Haiku 4.5 | $0.00008 | $0.00245 |
Grade A, and why
matter-workspace 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 13d 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- matter-workspace — 100% identical, 0 lines differ
- matter-workspace — 88% identical, 12 lines differ
How it starts
The opening of the file, as written. The whole thing — 186 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/matter-workspace
Practitioners work across multiple clients and matters. A matter workspace keeps one client or engagement's context separate from every other. This skill manages those workspaces.
Subcommands
/ai-governance-legal:matter-workspace new <slug>— create a new matter workspace, run a short intake, writematter.md/ai-governance-legal:matter-workspace list— list matters with status and active flag/ai-governance-legal:matter-workspace switch <slug>— set the active matter/ai-governance-legal:matter-workspace close <slug>— archive a matter (move to~/.claude/plugins/config/claude-for-legal/ai-governance-legal/matters/_archived/, never delete)/ai-governance-legal:matter-workspace none— detach from any active matter, work at practice-level only
Instructions
- Read
~/.claude/plugins/config/claude-for-legal/ai-governance-legal/CLAUDE.md— confirm the## Matter workspacessection is populated. IfEnabledis✗, tell the user: "Matter workspaces are off — you're configured as an in-house practice with one client, so the plugin works from practice-level context automatically. If you actually work across multiple clients, re-run/ai-governance-legal:cold-start-interview --redoand select a private-practice setting. Otherwise, you don't need/matter-workspaceat all." Don't error — the disabled state is the expected one for in-house users. - Use the workflow below.
- Dispatch on the first token of
$ARGUMENTS:new→ run the intake interview, write~/.claude/plugins/config/claude-for-legal/ai-governance-legal/matters/<slug>/matter.md, seedhistory.mdandnotes.md.list→ enumerate~/.claude/plugins/config/claude-for-legal/ai-governance-legal/matters/*/matter.md, print a table, mark the active matter.switch→ update theActive matter:line in the practice-level CLAUDE.md.close→ move~/.claude/plugins/config/claude-for-legal/ai-governance-legal/matters/<slug>/to~/.claude/plugins/config/claude-for-legal/ai-governance-legal/matters/_archived/<slug>/, log the close date inhistory.md.none→ setActive matter:tonone — practice-level context only.
- Show the user what changed and confirm before writing.
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.
- 13d ago First seen · 186 lines · 82 tokens per session scan A 8226cf1c7d54
matter-workspace is a skill published in the GitHub repository anthropics/claude-for-legal (9,433 stars, last pushed 21d ago), licensed Apache-2.0. It adds 82 tokens to every session and 2,448 once invoked, about $0.0004 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 2026-08-30.
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