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investigate

Find out why something failed or behaves the way it does, using read-only commands only, and report the cause back in chat.

Skill by MarvinJWendt

IndexedMIT★ 1
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Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/marvinjwendt-investigate

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Find out why something failed or behaves the way it does, using read-only commands only, and report the cause back in chat.

Use cases: documents

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Permissions

What this skill can do and what it asks for, from its SKILL.md and code. Checked Nov 1, 2026.

Tools
No tools found
Secrets
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Install scripts
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Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/investigate

What's inside

Skill name
investigate
Description
Find out why something failed or behaves the way it does, using read-only commands only, and report the cause back in chat.
License
MIT
Instructions
18 lines in SKILL.md · view on GitHub

Files (1)

  • SKILL.md

SKILL.md (first lines)

# Investigate

The user wants an explanation, not a fix. Find the cause and report it in chat. Editing files, applying a patch or fixing it on the way is a separate task they start themselves.

Every command you run only reads: `cat`, `grep`, `git log`, `git diff`, `journalctl`, `docker logs`, `kubectl get/describe/logs`, a `--dry-run`, a `--help`. Anything that writes, installs, restarts, deletes or touches remote state waits for the user to ask for it. If the investigation dead-ends without such a command, name the command and let him decide.

Dig until you have the actual cause. "The build failed" is the symptom, "the lockfile pins X 2.0 while the code calls the 1.x API" is the cause. Follow the chain backwards: the error, the code that raised it, the state that got it there, the change that created that state. A guess stays labelled as a guess.

## The report

Run the `unslop` skill over it. Short and concrete, with enough detail that the user can act on it without a follow-up question.

- Lead with the cause, one or two sentences.
- Then the chain that proves it, carrying its evidence: file paths with line numbers, log lines, commit SHAs, command output. Quote the parts that make the point.
- Name what stayed unclear and why.
- Close with what would fix it, a few lines. Whether you do it is the user's call.

From MarvinJWendt/skills, MIT.

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Last commit (this folder)
Oct 10, 2026 (27 days ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

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Cite this page

investigate skill. Agent Mart. https://agentmart.dev/skills/marvinjwendt-investigate (last updated 2026-10-24)