bug-localization

Localize the exact file, function, or line introducing a bug from stack traces, tests, logs, and reports.

1|2|Updated Mar 10, 2026
One-click install
npx skills add https://github.com/santosomar/general-secure-coding-agent-skills --skill bug-localization-santosomar
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: bug-localization
Source: https://github.com/santosomar/general-secure-coding-agent-skills/tree/main/skills/debugging/bug-localization
Command: npx skills add https://github.com/santosomar/general-secure-coding-agent-skills --skill bug-localization-santosomar

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill precisely identifies the specific file, function, or line of code responsible for a reported bug, even when the initial symptom is unclear.

Core Features & Use Cases

  • Fault Localization: Distinguishes between bug symptoms and the actual root cause in the code.
  • Signal Analysis: Leverages stack traces, failing tests, logs, and prose descriptions to guide the localization process.
  • Use Case: When a NullPointerException occurs, this skill helps find where the null was introduced, not just where the exception was thrown.

Quick Start

Use the bug localization skill to find the origin of the bug described in the provided stack trace.

Frequently Asked Questions about bug-localization

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

FAQPage Schema
How do I find the root cause of a bug instead of just the symptom in my code?

To find the root cause of a bug, you trace backward from identified anchors like stack traces and failing tests. This differentiates the actual fault location from the initial symptom, such as finding where a null value was introduced rather than where the exception was thrown.

Can I use stack traces and logs to pinpoint the exact file causing a code fault?

Yes, you can use stack traces and logs to pinpoint the exact file causing a code fault. The localization process analyzes various input signals including stack traces, failing tests, logs, and natural language bug reports to trace backward and identify the precise origin.

What is fault localization and how does it differentiate from standard debugging?

Fault localization is the process of identifying the specific file, function, or line of code responsible for a reported bug. It differentiates from standard debugging by distinguishing between bug symptoms and the actual root cause in the codebase to facilitate efficient remediation.

How do I locate where a null value was introduced when a NullPointerException occurs?

To locate where a null value was introduced during a NullPointerException, you analyze the stack trace and bug reports to trace backward. This identifies the exact fault location where the null originated, rather than just where the exception was thrown.

Does bug localization work with natural language bug reports without stack traces?

Yes, bug localization works with natural language bug reports without stack traces. The analysis leverages prose descriptions, logs, and failing tests as input signals to guide the backward tracing process and pinpoint the exact fault location.

What are the limitations of using static and dynamic analysis for fault finding?

Fault finding using static and dynamic analysis relies on the quality of input signals like stack traces, logs, and failing tests. If the initial symptom is unclear or the provided signals lack sufficient detail, pinpointing the exact root cause location may be less precise.