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deep-trace

Trace code lines to screens, data flows, and event triggers from PR diffs.

1|1|Updated Feb 13, 2026
Search Tags:#debugging#extension#trace#diff#code-analysis#execution-path
One-click install
npx skills add https://github.com/laststance/skills --skill deep-trace-laststance
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: deep-trace
Source: https://github.com/laststance/skills/tree/main/skills/deep-trace
Command: npx skills add https://github.com/laststance/skills --skill deep-trace-laststance

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Diff tracing to understand exact code execution paths by mapping each meaningful line to its effect on UI, data, and events.

Core Features & Use Cases

  • Line-by-line path tracing that shows the screen/URL where code runs.
  • Bidirectional tracing: UP to entry points and DOWN to downstream calls.
  • Generate an exportable trace table and a Deep Trace Extension-ready summary.

Quick Start

Provide a PR diff or a target file path to begin tracing and observe a line-by-line execution path.

Frequently Asked Questions about deep-trace

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

FAQPage Schema
How do I trace code execution paths from a PR diff?▼

To trace code execution paths from a PR diff, you provide the diff to generate a line-by-line trace mapping each code line to its effect on UI, data, and events, outputting an exportable table and summary.

What is line-by-line diff tracing for code analysis?▼

Line-by-line diff tracing is a code analysis technique that maps exact execution paths by linking each meaningful code line to screen locations, data flows, and event triggers across components and API calls.

Can I trace upstream entry points and downstream calls across file paths?▼

Yes, you can trace bidirectionally across file paths to map upstream entry points and downstream calls, generating an entry-point-driven trace that reveals the complete execution path across hooks and components.

Does the trace output work with code analysis extensions?▼

Yes, the trace output works with code analysis extensions by generating an extension-compatible table and a Deep Trace Extension-ready summary to help developers visualize execution paths directly.

What is the best way to understand execution paths in a complex codebase?▼

The best way to understand execution paths in a complex codebase is using line-by-line diff tracing to map granular code lines across hooks and API calls to their exact UI and data effects.

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