Root Cause Investigation
garrytan/gstack
Debugs in four phases (investigate, analyze, hypothesize, implement) under one rule: no fix is made until the root cause is found.
Draft an audience-specific summary from the privileged investigation memo — HR, leadership, or outside counsel versions.
OfficialApache-2.0Auto-check passed
Install Investigation Summary
$ npx skills add anthropics/claude-for-legal --skill investigation-summary -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install anthropics/claude-for-legal investigation-summary --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/anthropics/claude-for-legal.git skills-src && mkdir -p .claude/skills && cp -r skills-src/employment-legal/skills/investigation-summary .claude/skills/investigation-summary && 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 "investigation-summary" agent skill from https://github.com/anthropics/claude-for-legal/tree/main/employment-legal/skills/investigation-summary into .claude/skills/investigation-summary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigation-summary", 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/anthropics/claude-for-legal/tree/main/employment-legal/skills/investigation-summaryType 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 anthropics/claude-for-legal --skill investigation-summary -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install anthropics/claude-for-legal investigation-summary --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anthropics/claude-for-legal.git skills-src && mkdir -p .agents/skills && cp -r skills-src/employment-legal/skills/investigation-summary .agents/skills/investigation-summary && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "investigation-summary" agent skill from https://github.com/anthropics/claude-for-legal/tree/main/employment-legal/skills/investigation-summary into .agents/skills/investigation-summary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigation-summary", 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 anthropics/claude-for-legal --skill investigation-summary -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install anthropics/claude-for-legal investigation-summary --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anthropics/claude-for-legal.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/employment-legal/skills/investigation-summary .cursor/skills/investigation-summary && 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 "investigation-summary" agent skill from https://github.com/anthropics/claude-for-legal/tree/main/employment-legal/skills/investigation-summary into .cursor/skills/investigation-summary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigation-summary", 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/anthropics/claude-for-legal.git --path employment-legal/skills/investigation-summary--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 anthropics/claude-for-legal --skill investigation-summary -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install anthropics/claude-for-legal investigation-summary --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anthropics/claude-for-legal.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/employment-legal/skills/investigation-summary .gemini/skills/investigation-summary && 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 "investigation-summary" agent skill from https://github.com/anthropics/claude-for-legal/tree/main/employment-legal/skills/investigation-summary into .gemini/skills/investigation-summary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigation-summary", 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 anthropics/claude-for-legal investigation-summaryInstalls 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 anthropics/claude-for-legal --skill investigation-summary -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/anthropics/claude-for-legal.git skills-src && mkdir -p .github/skills && cp -r skills-src/employment-legal/skills/investigation-summary .github/skills/investigation-summary && 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 "investigation-summary" agent skill from https://github.com/anthropics/claude-for-legal/tree/main/employment-legal/skills/investigation-summary into .github/skills/investigation-summary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigation-summary", 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 anthropics/claude-for-legal --skill investigation-summary -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install anthropics/claude-for-legal investigation-summary --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anthropics/claude-for-legal.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/employment-legal/skills/investigation-summary .opencode/skills/investigation-summary && 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 "investigation-summary" agent skill from https://github.com/anthropics/claude-for-legal/tree/main/employment-legal/skills/investigation-summary into .opencode/skills/investigation-summary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigation-summary", 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
investigation-summary- GitHub stars
- 9.6k
- Used in
- 2 other repos
- Token cost
- ~326 tokens
- SKILL.md length
- 86 words
- Files
- 1
- Skills in repo
- 147
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Draft an audience-specific summary from the privileged investigation memo — HR, leadership, or outside counsel versions.
- Works in 3 steps: Load the internal-investigation… → If no memo exists yet, offer to draft… → HR summaries must not include attorney…
- An investigation memo needs to be communicated to an audience that should not see the full privileged work product
- SKILL.md covers Instructions and Examples
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Investigation Summary is an agent skill from anthropics/claude-for-legal, published by the product's own GitHub organization. Draft an audience-specific summary from the privileged investigation memo — HR, leadership, or outside counsel versions. Use when an investigation memo needs to be communicated to an audience that should not see the full privileged work product.
Its SKILL.md is about 330 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
- An investigation memo needs to be communicated to an audience that should not see the full privileged work product
Example prompts
- “/investigation-summary”
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Load the internal-investigation reference skill and run Mode 5 (Audience summary).
- If no memo exists yet, offer to draft the memo first.
- HR summaries must not include attorney mental impressions, credibility
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.
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
Investigation Summary loads about 326 tokens when it runs. Until then it costs about 67 tokens; SKILL.md has 86 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
The full file from anthropics/claude-for-legal at commit 4a6c651, republished under its Apache-2.0 licence (© anthropics). 86 words, ~326 tokens.
Download SKILL.mdSave it as
.claude/skills/investigation-summary/SKILL.md (or your agent's skills folder).- name
- investigation-summary
- description
- Draft an audience-specific summary from the privileged investigation memo — HR, leadership, or outside counsel versions. Use when an investigation memo needs to be communicated to an audience that should not see the full privileged work product.
- argument-hint
- [matter name] [audience: hr / leadership / outside-counsel]
/investigation-summary
Drafts a stripped-down, audience-appropriate summary from the privileged investigation memo. HR summaries contain no privilege analysis. Leadership summaries are high-level. Outside counsel briefings include full context.
Instructions
- Load the
internal-investigationreference skill and run Mode 5 (Audience summary). - If no memo exists yet, offer to draft the memo first.
- HR summaries must not include attorney mental impressions, credibility methodology, or legal exposure analysis.
Examples
/employment-legal:investigation-summary [matter name] hr/employment-legal:investigation-summary [matter name] leadership/employment-legal:investigation-summary [matter name] outside-counselDetailed audience-stripping rules and summary templates live in the
internal-investigationreference skill — load it before doing substantive work.
© 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 employment-legal/skills/investigation-summary of anthropics/claude-for-legal.
Open the folder on GitHubat commit 4a6c651
Used in 2 other repositories
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 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
Investigation Summary 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 |
|---|---|---|---|---|---|---|
| Investigation Summary this skillanthropics/claude-for-legal | 9.6k | 2 repos | ~326 | Automated safety check: Pass | Apache-2.0 | |
| Root Cause Investigationgarrytan/gstack | 136k | — | ~13k | Automated safety check: Notes | MIT | |
| Osint Investigationaffaan-m/ECC | 276k | — | ~5.7k | Automated safety check: Pass | CC-BY-SA-4.0 | |
| Investigate CIClickHouse/ClickHouse | 50k | — | ~11k | Automated safety check: Notes | Apache-2.0 | |
| Investigate Issuevideojs/video.js | 40k | — | ~318 | Automated safety check: Pass | Custom licence | |
| Investigating ReplayPostHog/posthog | 40k | — | ~2.4k | Automated safety check: Pass | Custom licence |
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Investigate Issue
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Investigating Replay
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Investigates a session recording by gathering metadata, person profile, same-session events, and linked error tracking issues in one pass.
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Speak Summary
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Convert text, markdown, or a summary produced by another skill into a listenable MP3 using local CPU-only neural text-to-speech.
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Questions about Investigation Summary
What does Investigation Summary do?
Draft an audience-specific summary from the privileged investigation memo — HR, leadership, or outside counsel versions. Investigation Summary is an agent skill from anthropics/claude-for-legal, published by the product's own GitHub organization. Draft an audience-specific summary from the privileged investigation memo — HR, leadership, or outside counsel versions.
When should I use Investigation Summary?
Investigation Summary fits situations like: an investigation memo needs to be communicated to an audience that should not see the full privileged work product.
How do I install Investigation Summary in Claude Code?
Run `npx skills add anthropics/claude-for-legal --skill investigation-summary -a claude-code`. Or copy the skill folder (employment-legal/skills/investigation-summary in anthropics/claude-for-legal) into .claude/skills/investigation-summary in your project. Claude Code loads it when a task matches its description.
How do I install Investigation Summary in Codex?
Run `npx skills add anthropics/claude-for-legal --skill investigation-summary -a codex`. Or copy the skill folder (employment-legal/skills/investigation-summary in anthropics/claude-for-legal) into .agents/skills/investigation-summary in your project. Codex loads it when a task matches its description.
Can I use Investigation Summary 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 investigation-summary -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/investigation-summary, .gemini/skills/investigation-summary, .github/skills/investigation-summary and .opencode/skills/investigation-summary in your project.
What does Investigation Summary need to run?
SKILL.md names no scripts, command-line tools or credentials: Investigation Summary is instructions for the agent only.
Does Investigation Summary 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 Investigation Summary 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 Investigation Summary use?
Investigation Summary 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 Investigation Summary use?
About 326 tokens (SKILL.md is roughly 1.3k 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 Investigation Summary?
Skills that share tags, products or a category with Investigation Summary: Root Cause Investigation (garrytan/gstack, 136k stars), Osint Investigation (affaan-m/ECC, 276k stars), Investigate CI (ClickHouse/ClickHouse, 50k stars) and Investigate Issue (videojs/video.js, 40k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Investigation Summary?
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.