Investigate (Grade A) logo

Investigate (Grade A)Security-tested tools skill for Claude AI. Grade A. Systematic debugging skill. Use when encountering a bug, test failure, unexpected behavior, or when asked to "investigate", "debug", "diagnose", or

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Daniel NikulshynReviewed by Daniel Nikulshyn·Updated July 2026

Overview

Investigate is a systematic debugging skill for security-tested tools, designed to enforce a root-cause-first discipline with structured hypothesis tracking. It's used when encountering bugs, test failures, unexpected behavior, or when asked to investigate, debug, diagnose, or figure out why. The skill involves a five-phase workflow: Collect (gather evidence), Hypothesize (form ranked hypotheses), Verify (test hypotheses), Fix (apply minimal fix), and Verify and Report (confirm resolution). Investigate helps users avoid guess-and-fix approaches, ensuring they find the root cause before applying fixes. It's suitable for developers and testers dealing with complex issues in codebases. The skill emphasizes thorough investigation over quick fixes, which can be time-consuming but leads to more reliable solutions. By following this structured approach, users can ensure they're addressing the actual root cause of issues rather than just symptoms.

Key features

  • Structured hypothesis tracking
  • Five-phase workflow (Collect, Hypothesize, Verify, Fix, Verify and Report)
  • Emphasis on root-cause-first discipline
  • Guidance on gathering evidence and testing hypotheses

Pricing

Model
Free
Category
Skills
Rating
No reviews yet

Use cases

Debugging complex code issues

Investigate can be used to systematically debug complex issues in codebases, ensuring that the root cause is identified and addressed.

Investigating test failures

The skill helps users investigate test failures, gather evidence, and form hypotheses to identify and fix the root cause.

Pros & Cons

Pros

  • Enforces systematic approach to debugging
  • Helps avoid guess-and-fix methods
  • Ensures root cause is identified before fixing
  • Provides structured workflow for complex issues

Cons

  • Can be time-consuming
  • May require careful reading of code and logs
  • Three-strike rule can lead to re-collection of data if initial hypotheses are incorrect

Reviews

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Q&A

Are there any limitations to using Investigate?

Yes, Investigate can be time-consuming and may require careful reading of code and logs, with a potential need to re-collect data if initial hypotheses are incorrect.

Asked by Dmitri Volkov · Nov 27, 2025

What are the pros of using Investigate?

Investigate enforces a systematic approach, helps avoid guess-and-fix methods, and ensures the root cause is identified before fixing, providing a structured workflow for complex issues.

Asked by Jasper Vermeer · Nov 3, 2025

What workflow does Investigate follow?

Investigate involves a five-phase workflow: Collect, Hypothesize, Verify, Fix, and Verify and Report, ensuring a structured approach to debugging.

Asked by Ethan Brooks · Oct 31, 2025

What is Investigate used for?

Investigate is used for debugging, diagnosing, and figuring out why issues occur in codebases, following a systematic, root-cause-first approach.

Asked by Isabela Almeida · Oct 23, 2025

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