Why is 'v' recommended over 'po' for Swift debugging?

The 'v' (frame variable) command reads memory directly without requiring compilation, making it more reliable and faster for inspecting Swift structs, enums, and local variables.

Can this skill help diagnose app freezes?

Yes, it includes a specific playbook for hang diagnosis that involves interrupting the process and analyzing all thread backtraces to identify deadlocks or CPU-bound tasks.

When should I use this skill instead of Instruments?

Use axiom-lldb for 'inspecting' state at a specific moment in time. Use Instruments for 'measuring' performance and resource trends over a period of time.

Does this work for SwiftUI state issues?

Yes, it provides strategies for inspecting underscore-prefixed backing properties of @State and using _printChanges() to diagnose view update failures.

What is the axiom-lldb Claude Code skill?

It is a specialized capability that provides Claude with playbooks and best practices for interactive runtime debugging of Apple platform applications using LLDB.

Advanced LLDB Debugging for xOS

Name: Advanced LLDB Debugging for xOS
Author: CharlesWiltgen

byCharlesWiltgen

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634

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Mobile Development

Debugs Apple platform applications interactively using LLDB to inspect state, analyze crashes, and resolve thread hangs.

Axiom LLDB is a specialized skill designed to master the complexities of the LLDB debugger within the xOS ecosystem. It solves the common 'knowledge gap' in Swift debugging by providing precise playbooks for variable inspection, crash triage, and deadlock diagnosis. Whether you are dealing with Swift-specific memory traps, SwiftUI state issues, or complex multi-threaded hangs, this skill provides the exact command sequences and interpretation logic needed to interrogate a running application and identify root causes without unnecessary rebuilds.

主要功能

01Step-by-step crash triage for EXC_BAD_ACCESS and runtime traps

02634 GitHub stars

03Thread backtrace analysis for diagnosing deadlocks and UI hangs

04Live state modification to test fixes without recompilation

05Conditional breakpoint strategies to isolate intermittent bugs

06Swift-optimized value inspection using 'v', 'p', and 'po' commands

使用场景

01Diagnosing main-thread blocking and synchronization issues

02Debugging SwiftUI state and @Observable mutations during execution

03Investigating runtime crashes by analyzing thread info and frames

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add charleswiltgen/axiom axiom-lldb

For use in Claude.ai and ChatGPT

Download Skill