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ios-ettrace-performance

ios-ettrace-performance is a skill for Claude Code from Xuzan9396/plugin_claude. It costs 32 tokens per session (2,296 once invoked), scanned C, original, no licence file.

An iOS Simulator profiling tool for capturing and reading ETTrace performance recordings. ETTrace is an Apple trace format that shows how an app uses time while starting or running.

In plain words
What is it for?
Use it to profile iOS app launch and runtime performance, compare recordings, and find CPU-heavy code paths.
Why use it?
It helps reveal slow startup, runtime latency, and code stacks that consume substantial CPU time.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the xz-ios-build plugin — 9 skills, 1 MCP server shipped together

not rated 6repo yesterday C scan 32 tokens no licence

Good fit Use it to profile iOS app launch and runtime performance, compare recordings, and find CPU-heavy code paths.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/xuzan9396/plugin_claude/ios-ettrace-performance
View source ↗ Xuzan9396/plugin_claude
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Xuzan9396/plugin_claude --skill ios-ettrace-performance
Clone the repo
git clone --depth 1 https://github.com/Xuzan9396/plugin_claude

Made for: Claude Code.

Or install xz-ios-build, the plugin that ships this one along with the rest of its 9 skills, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ios-ettrace-performance

README.md
[![agentmods](https://agentmods.dev/badge/skills/xuzan9396/plugin_claude/ios-ettrace-performance/github.svg)](https://agentmods.dev/skills/xuzan9396/plugin_claude/ios-ettrace-performance)
Your own site
<a href="https://agentmods.dev/skills/xuzan9396/plugin_claude/ios-ettrace-performance"><img src="https://agentmods.dev/badge/skills/xuzan9396/plugin_claude/ios-ettrace-performance/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ios-ettrace-performance

Your own site · 80×15
<a href="https://agentmods.dev/skills/xuzan9396/plugin_claude/ios-ettrace-performance"><img src="https://agentmods.dev/badge/skills/xuzan9396/plugin_claude/ios-ettrace-performance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,296 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00032 $0.02296
Opus 5 $0.00016 $0.01148
Sonnet 5 $0.00006 $0.00459
Haiku 4.5 $0.00003 $0.00230

Measured today against content hash b50f35bff9e1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-17, from the pricing page.

Security

Grade C, and why

ios-ettrace-performance scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/analyze_flamegraph_json.py, scripts/collect_ios_dsyms.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf "$RUN_DIR/ETTrace-iphonesimulator.xcarchive" "$RUN_DIR/ETTrace.xcframework"
plugins/ios-build/skills/ios-ettrace-performance/SKILL.md · 198 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. today First seen · 198 lines · 32 tokens per session scan C b50f35bff9e1

Subscribe to this mod's changes

ios-ettrace-performance is a skill published in the GitHub repository Xuzan9396/plugin_claude (6 stars, last pushed yesterday), with no licence file. It adds 32 tokens to every session and 2,296 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-17.

DebuggingMobile
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