Mobile App Debugging
secondsky/claude-skills
Mobile app debugging for iOS, Android, cross-platform frameworks.
Debug iOS apps and profile performance using LLDB, the interactive Memory Graph Debugger, and Instruments.
Install Debugging Instruments
$ npx skills add dpearson2699/swift-ios-skills --skill debugging-instruments -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dpearson2699/swift-ios-skills debugging-instruments --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/debugging-instruments .claude/skills/debugging-instruments && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "debugging-instruments" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/debugging-instruments into .claude/skills/debugging-instruments/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debugging-instruments", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/debugging-instrumentsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add dpearson2699/swift-ios-skills --skill debugging-instruments -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dpearson2699/swift-ios-skills debugging-instruments --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/debugging-instruments .agents/skills/debugging-instruments && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "debugging-instruments" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/debugging-instruments into .agents/skills/debugging-instruments/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debugging-instruments", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add dpearson2699/swift-ios-skills --skill debugging-instruments -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dpearson2699/swift-ios-skills debugging-instruments --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/debugging-instruments .cursor/skills/debugging-instruments && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "debugging-instruments" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/debugging-instruments into .cursor/skills/debugging-instruments/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debugging-instruments", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/dpearson2699/swift-ios-skills.git --path skills/debugging-instruments--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add dpearson2699/swift-ios-skills --skill debugging-instruments -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dpearson2699/swift-ios-skills debugging-instruments --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/debugging-instruments .gemini/skills/debugging-instruments && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "debugging-instruments" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/debugging-instruments into .gemini/skills/debugging-instruments/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debugging-instruments", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install dpearson2699/swift-ios-skills debugging-instrumentsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add dpearson2699/swift-ios-skills --skill debugging-instruments -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/debugging-instruments .github/skills/debugging-instruments && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "debugging-instruments" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/debugging-instruments into .github/skills/debugging-instruments/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debugging-instruments", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add dpearson2699/swift-ios-skills --skill debugging-instruments -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install dpearson2699/swift-ios-skills debugging-instruments --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dpearson2699/swift-ios-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/debugging-instruments .opencode/skills/debugging-instruments && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "debugging-instruments" agent skill from https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/debugging-instruments into .opencode/skills/debugging-instruments/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "debugging-instruments", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
debugging-instruments- GitHub stars
- 1.2k
- Token cost
- ~3.6k tokens
- SKILL.md length
- 1,095 words
- Files
- 4 (incl. references)
- Skills in repo
- 86
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Debug iOS apps and profile performance using LLDB, the interactive Memory Graph Debugger, and Instruments.
- Works in 4 steps: Reproduce in a Debug build and stop at… → Inspect locals without executing code,… → Move to the relevant frame or thread and… → …
- Retain-cycle inspection
- SKILL.md covers Contents, LLDB Debugging, Memory Debugging and Hang Diagnostics, plus 5 more sections
- Calls xcrun
What it does
Debugging Instruments is an agent skill from dpearson2699/swift-ios-skills. Debug iOS apps and profile performance using LLDB, the interactive Memory Graph Debugger, and Instruments. Use for crashes, retain-cycle inspection, hangs, build failures, and generic CPU, memory, energy, or network profiling. Use ios-memgraph-analysis for .memgraph capture, leaks CLI ownership paths, or persistent heap growth; use ios-ettrace-performance for ETTrace capture and JSON.
Its SKILL.md is about 3.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `evals/evals.json`, `references/instruments-guide.md` and `references/lldb-patterns.md`).
It sits in Development, covering iOS development, Debugging and Performance optimization. It works with iOS. The repository describes itself as: Agent Skills for iOS 26+, Swift 6.3, SwiftUI, and modern Apple frameworks.
When your agent uses it
- Retain-cycle inspection
- Network profiling
Example prompts
- “/debugging-instruments”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Reproduce in a Debug build and stop at the narrowest useful breakpoint.
- Inspect locals without executing code, then capture the current stack.
- Move to the relevant frame or thread and verify the failing state.
- Add a condition or watchpoint only when the bad transition is still unclear.
What it can do on your machine
Read from SKILL.md and the folder at commit 8d90fd1. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
xcrun
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
sosumi.aideveloper.apple.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Debugging Instruments loads about 3.6k tokens when it runs, and up to ~9.2k if it reads all its reference files. Until then it costs about 102 tokens; SKILL.md has 1,095 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,095 words (~3,606 tokens).
“Keep interactive graph and Instruments triage here. Route detailed .memgraph command-line ownership/growth analysis and ETTrace work to their focused skills.”
- name
- debugging-instruments
Files
SKILL.md and 3 other files (references) in skills/debugging-instruments of dpearson2699/swift-ios-skills.
- SKILL.md
- evals/evals.json
- references/instruments-guide.md
- references/lldb-patterns.md
Open the folder on GitHubat commit 8d90fd1
Compare with similar skills
Debugging Instruments next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Debugging Instruments this skilldpearson2699/swift-ios-skills | 1.2k | — | ~3.6k | Automated safety check: Pass | Custom licence | |
| Mobile App Debuggingsecondsky/claude-skills | 227 | — | ~513 | Automated safety check: Pass | MIT | |
| Native App Performanceharperreed/dotfiles | 334 | 4 repos | ~538 | Automated safety check: Pass | None | |
| iOS Crash Log Debuggingconorluddy/xclaude-plugin | 183 | — | ~4.9k | Automated safety check: Pass | MIT | |
| Performance Profilingconorluddy/xclaude-plugin | 183 | — | ~7.3k | Automated safety check: Pass | MIT | |
| Apple Crash Log .NET Symbolicationdotnet/skills | 5.6k | 1 repos | ~2.4k | Automated safety check: Pass | MIT |
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Performance Profiling
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- Official
Apple Crash Log .NET Symbolication
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C Bounds Safety
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Related
Works with
Categories
Questions about Debugging Instruments
What does Debugging Instruments do?
Debug iOS apps and profile performance using LLDB, the interactive Memory Graph Debugger, and Instruments. Debugging Instruments is an agent skill from dpearson2699/swift-ios-skills. Debug iOS apps and profile performance using LLDB, the interactive Memory Graph Debugger, and Instruments.
When should I use Debugging Instruments?
Debugging Instruments fits situations like: retain-cycle inspection; network profiling.
How do I install Debugging Instruments in Claude Code?
Run `npx skills add dpearson2699/swift-ios-skills --skill debugging-instruments -a claude-code`. Or copy the skill folder (skills/debugging-instruments in dpearson2699/swift-ios-skills) into .claude/skills/debugging-instruments in your project. Claude Code loads it when a task matches its description.
How do I install Debugging Instruments in Codex?
Run `npx skills add dpearson2699/swift-ios-skills --skill debugging-instruments -a codex`. Or copy the skill folder (skills/debugging-instruments in dpearson2699/swift-ios-skills) into .agents/skills/debugging-instruments in your project. Codex loads it when a task matches its description.
Can I use Debugging Instruments in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add dpearson2699/swift-ios-skills --skill debugging-instruments -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/debugging-instruments, .gemini/skills/debugging-instruments, .github/skills/debugging-instruments and .opencode/skills/debugging-instruments in your project.
What does Debugging Instruments need to run?
Going by SKILL.md and its folder, Debugging Instruments needs the command-line tools its instructions call (xcrun).
Does Debugging Instruments access the network?
SKILL.md names 2 domains. As links in the text: sosumi.ai and developer.apple.com. This is read from the text; nothing was executed.
Is Debugging Instruments safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Debugging Instruments use?
Debugging Instruments has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Debugging Instruments use?
About 3.6k tokens (SKILL.md is roughly 14k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 5.6k tokens, read only when the agent opens those files.
What are the alternatives to Debugging Instruments?
Skills that share tags, products or a category with Debugging Instruments: Mobile App Debugging (secondsky/claude-skills, 227 stars), Native App Performance (harperreed/dotfiles, 334 stars), iOS Crash Log Debugging (conorluddy/xclaude-plugin, 183 stars) and Performance Profiling (conorluddy/xclaude-plugin, 183 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Debugging Instruments?
dpearson2699 (a GitHub user) maintains it in dpearson2699/swift-ios-skills, which has 1,173 GitHub stars. The repository holds 86 skills in this directory. The repository was last updated on July 31, 2026.
Source: dpearson2699/swift-ios-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.