investigate

Guide engineers through hypothesis-driven root-cause analysis before applying fixes.

Updated Apr 11, 2026
One-click install
npx skills add https://github.com/akiyoshi/gstack-copilot-jp --skill investigate-akiyoshi
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: investigate
Source: https://github.com/akiyoshi/gstack-copilot-jp/tree/main/.github/skills/investigate
Command: npx skills add https://github.com/akiyoshi/gstack-copilot-jp --skill investigate-akiyoshi

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Root-cause debugging discipline that prevents fix-quick firefighting by requiring evidence-based investigations before changes.

Core Features & Use Cases

  • Phase-based debugging workflow (Root Cause Investigation, Pattern Analysis, Hypothesis Testing, Implementation, Verification)
  • Guided tool-assisted analysis with prompts and commands to collect evidence, reproduce issues, and validate fixes
  • Clear escalation points to avoid scope creep and ensure durable solutions

Quick Start

Start Phase 1 by collecting symptoms and reading the code path to identify the root cause.

Frequently Asked Questions about investigate

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I perform systematic root-cause debugging for complex codebase regressions?

Hypothesis-driven debugging prevents recurring bugs by requiring evidence collection and root-cause verification before applying fixes. It enforces a phase-based workflow encompassing investigation, pattern analysis, hypothesis testing, implementation, and verification.

What's the best way to stop fix-quick firefighting and ensure traceability during bug investigations?

Structured debugging workflows prevent fix-quick firefighting by requiring evidence-based investigations and explicit root-cause verification steps before changes. This enforces traceability and ensures durable solutions across complex systems.

How do I start a structured root-cause investigation when reproducing a feature regression?

Start root-cause investigation by collecting symptoms and reading the code path to identify the root cause. Use guided tool-assisted analysis with commands to collect evidence and reproduce issues before forming testable hypotheses.

Does this hypothesis-driven debugging workflow integrate with bash and ask_user tools for evidence collection?

Hypothesis-driven debugging integrates with tools like ask_user and bash to facilitate guided tool-assisted analysis. This integration prompts engineers to collect evidence, reproduce issues, and validate fixes during the investigation.

What are the limitations of applying pattern analysis without explicit root-cause verification steps?

Applying pattern analysis without explicit root-cause verification risks implementing superficial fixes that fail to address the actual issue. A documented verification workflow, including a regression test, is required to ensure the fix is durable and safe.