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Mandatory external verification workflow for ALL non-trivial factual claims before presenting them as true.
Install Mandatory Verification
$ npx skills add lawve-ai/awesome-legal-skills --skill mandatory-verification -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install lawve-ai/awesome-legal-skills mandatory-verification --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/lawve-ai/awesome-legal-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/mandatory-verification-larissa-meredith-flister .claude/skills/mandatory-verification && rm -rf skills-srcUse ~/.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/
Install the "mandatory-verification" agent skill from https://github.com/lawve-ai/awesome-legal-skills/tree/main/skills/mandatory-verification-larissa-meredith-flister into .claude/skills/mandatory-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mandatory-verification", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/lawve-ai/awesome-legal-skills/tree/main/skills/mandatory-verification-larissa-meredith-flisterType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add lawve-ai/awesome-legal-skills --skill mandatory-verification -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install lawve-ai/awesome-legal-skills mandatory-verification --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lawve-ai/awesome-legal-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/mandatory-verification-larissa-meredith-flister .agents/skills/mandatory-verification && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "mandatory-verification" agent skill from https://github.com/lawve-ai/awesome-legal-skills/tree/main/skills/mandatory-verification-larissa-meredith-flister into .agents/skills/mandatory-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mandatory-verification", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add lawve-ai/awesome-legal-skills --skill mandatory-verification -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install lawve-ai/awesome-legal-skills mandatory-verification --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lawve-ai/awesome-legal-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/mandatory-verification-larissa-meredith-flister .cursor/skills/mandatory-verification && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "mandatory-verification" agent skill from https://github.com/lawve-ai/awesome-legal-skills/tree/main/skills/mandatory-verification-larissa-meredith-flister into .cursor/skills/mandatory-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mandatory-verification", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/lawve-ai/awesome-legal-skills.git --path skills/mandatory-verification-larissa-meredith-flister--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add lawve-ai/awesome-legal-skills --skill mandatory-verification -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install lawve-ai/awesome-legal-skills mandatory-verification --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lawve-ai/awesome-legal-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/mandatory-verification-larissa-meredith-flister .gemini/skills/mandatory-verification && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "mandatory-verification" agent skill from https://github.com/lawve-ai/awesome-legal-skills/tree/main/skills/mandatory-verification-larissa-meredith-flister into .gemini/skills/mandatory-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mandatory-verification", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install lawve-ai/awesome-legal-skills mandatory-verificationInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add lawve-ai/awesome-legal-skills --skill mandatory-verification -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/lawve-ai/awesome-legal-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/mandatory-verification-larissa-meredith-flister .github/skills/mandatory-verification && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "mandatory-verification" agent skill from https://github.com/lawve-ai/awesome-legal-skills/tree/main/skills/mandatory-verification-larissa-meredith-flister into .github/skills/mandatory-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mandatory-verification", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add lawve-ai/awesome-legal-skills --skill mandatory-verification -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install lawve-ai/awesome-legal-skills mandatory-verification --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lawve-ai/awesome-legal-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/mandatory-verification-larissa-meredith-flister .opencode/skills/mandatory-verification && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "mandatory-verification" agent skill from https://github.com/lawve-ai/awesome-legal-skills/tree/main/skills/mandatory-verification-larissa-meredith-flister into .opencode/skills/mandatory-verification/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mandatory-verification", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
mandatory-verification- GitHub stars
- 847
- Token cost
- ~3.7k tokens
- SKILL.md length
- 1,938 words
- Files
- 2
- Skills in repo
- 154
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Mandatory external verification workflow for ALL non-trivial factual claims before presenting them as true.
- Works in 3 steps: Decompose the Task → Verify Each Proposition → Draft with Verified Claims Only
- The user asks Claude to check
- SKILL.md covers Purpose, When This Skill Applies, Core Principle: Non-Reliance… and The Verification Workflow, plus 9 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Mandatory Verification is an agent skill from lawve-ai/awesome-legal-skills. Mandatory external verification workflow for ALL non-trivial factual claims before presenting them as true. This skill MUST be used whenever Claude is asked to research any topic, answer factual questions, provide current information, draft documents containing factual claims, give legal advice or cite legal authority, discuss current events or public figures, provide technical or scientific information, state statistics or data points, or answer ANY question where the answer could have changed over time. Also…
Its SKILL.md is about 3.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `README.md`).
It sits in Data & Analytics, covering Statistics. The repository describes itself as: A curated list of awesome Agent Skills for automating legal work.
When your agent uses it
- The user asks Claude to check
- Find out anything
- The user needs information that requires freshness
- Source accuracy
Example prompts
- “verify”
- “confirm”
- “research”
- “/mandatory-verification”
Workflow steps
3 steps, taken from the step headings in SKILL.md.
- Decompose the Task
- Verify Each Proposition
- Draft with Verified Claims Only
What it can do on your machine
Read from SKILL.md and the folder at commit 045f738. 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.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
bankofengland.co.uklegislation.gov.uk
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
Mandatory Verification loads about 3.7k tokens when it runs. Until then it costs about 227 tokens; SKILL.md has 1,938 words of instructions outside code blocks.
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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,938 words (~3,731 tokens).
“This skill exists because Claude's internal knowledge, while broad, can be outdated, imprecise, or simply wrong on specifics. Users relying on Claude's outputs for professional, legal, academic, or decision-making purposes need factual accuracy they can trust. The only way to…”
- name
- mandatory-verification
Files
SKILL.md and 1 other file in skills/mandatory-verification-larissa-meredith-flister of lawve-ai/awesome-legal-skills.
- SKILL.md
- README.md
Open the folder on GitHubat commit 045f738
Compare with similar skills
Mandatory Verification 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Mandatory Verification this skilllawve-ai/awesome-legal-skills | 847 | — | ~3.7k | Automated safety check: Pass | Custom licence | |
| Sandbox Benchvercel/next.js | 143k | — | ~4.1k | Automated safety check: Pass | MIT | |
| Statistical Analysisspacering-net/codeg | 3.9k | 3 repos | ~5k | Automated safety check: Pass | MIT | |
| StatsmodelszLanqing/codex-claude-academic-skills | 4.7k | 15 repos | ~4.9k | Automated safety check: Pass | BSD-3-Clause | |
| AI Daily DigestvigorX777/ai-daily-digest | 1.6k | — | ~1.3k | Automated safety check: Pass | None | |
| Statistical Powerspacering-net/codeg | 3.9k | 1 repos | ~3.6k | Automated safety check: Notes | MIT |
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Related
Categories
Questions about Mandatory Verification
What does Mandatory Verification do?
Mandatory external verification workflow for ALL non-trivial factual claims before presenting them as true. Mandatory Verification is an agent skill from lawve-ai/awesome-legal-skills. Mandatory external verification workflow for ALL non-trivial factual claims before presenting them as true.
When should I use Mandatory Verification?
Mandatory Verification fits situations like: the user asks Claude to check; find out anything; the user needs information that requires freshness; source accuracy.
How do I install Mandatory Verification in Claude Code?
Run `npx skills add lawve-ai/awesome-legal-skills --skill mandatory-verification -a claude-code`. Or copy the skill folder (skills/mandatory-verification-larissa-meredith-flister in lawve-ai/awesome-legal-skills) into .claude/skills/mandatory-verification in your project. Claude Code loads it when a task matches its description.
How do I install Mandatory Verification in Codex?
Run `npx skills add lawve-ai/awesome-legal-skills --skill mandatory-verification -a codex`. Or copy the skill folder (skills/mandatory-verification-larissa-meredith-flister in lawve-ai/awesome-legal-skills) into .agents/skills/mandatory-verification in your project. Codex loads it when a task matches its description.
Can I use Mandatory Verification 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 lawve-ai/awesome-legal-skills --skill mandatory-verification -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mandatory-verification, .gemini/skills/mandatory-verification, .github/skills/mandatory-verification and .opencode/skills/mandatory-verification in your project.
What does Mandatory Verification need to run?
SKILL.md names no scripts, command-line tools or credentials: Mandatory Verification is instructions for the agent only.
Does Mandatory Verification access the network?
SKILL.md names 2 domains. As links in the text: bankofengland.co.uk and legislation.gov.uk. This is read from the text; nothing was executed.
Is Mandatory Verification 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 Mandatory Verification use?
Mandatory Verification has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Mandatory Verification use?
About 3.7k tokens (SKILL.md is roughly 15k 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 Mandatory Verification?
Skills that share tags, products or a category with Mandatory Verification: Sandbox Bench (vercel/next.js, 143k stars), Statistical Analysis (spacering-net/codeg, 3.9k stars), Statsmodels (zLanqing/codex-claude-academic-skills, 4.7k stars) and AI Daily Digest (vigorX777/ai-daily-digest, 1.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Mandatory Verification?
lawve-ai (a GitHub organization) maintains it in lawve-ai/awesome-legal-skills, which has 847 GitHub stars. The repository holds 154 skills in this directory. The repository was last updated on October 2, 2026.
Source: lawve-ai/awesome-legal-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.