native-app-performance SKILL.md skillA
native-app-performance from steipete/agent-scripts is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add steipete/agent-scripts/native-app-performance@git:20260523.0a2d76cPins git:20260523.0a2d76c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- steipete/agent-scripts
- Path
skills/native-app-performance/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260523.0a2d76c, committed May 23, 2026
- First version recorded
- Dec 30, 2025
- Size
- 1,946 bytes
- Repository stars
- 7,470
- License
- MIT
Native app performance: xctrace, Time Profiler, traces, hotspots.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Native App Performance (CLI-only) Goal: record Time Profiler via `xctrace`, extract samples, symbolicate, and propose hotspots without opening Instruments. ## Quick start (CLI) 1) Record Time Profiler (attach): ```bash # Start app yourself, then attach xcrun xctrace record --template 'Time Profiler' --time-limit 90s --output /tmp/App.trace --attach <pid> ``` 2) Record Time Profiler (launch): ```bash xcrun xctrace record --template 'Time Profiler' --time-limit 90s --output /tmp/App.trace --launch -- /path/App.app/Contents/MacOS/App ``` 3) Extract time samples: ```bash scripts/extract_time_samples.py --trace /tmp/App.trace --output /tmp/time-sample.xml ``` 4) Get load address for symbolication: ```bash # While app is running vmmap <pid> | rg -m1 "__TEXT" -n ``` 5) Symbolicate + rank hotspots: ```bash scripts/top_hotspots.py --samples /tmp/time-sample.xml \ --binary /path/App.app/Contents/MacOS/App \ --load-address 0x100000000 --top 30 ``` ## Workflow notes - Always confirm you’re profiling the correct binary (local build vs /Applications). Prefer direct binary path for `--launch`. - Ensure you trigger the slow path during capture (menu open/close, refresh, etc.). …
Read the whole file at its exact version.
How to install
mdr add steipete/agent-scripts/native-app-performance@sha256:0c8a67d976b271b5The line at the top of this page pins the label git:20260523.0a2d76c, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_3nh2detvxct7pd7p)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Dec 30, 2025 and May 23, 2026, about one every 36 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260523.0a2d76c latest | 2026-05-23 | 0a2d76c | 1,946 B | A | view · diff |
| git:20260509.51ee7e5 | 2026-05-09 | 51ee7e5 | 1,958 B | A | view · diff |
| git:20260508.3a56241 | 2026-05-08 | 3a56241 | 1,990 B | A | view · diff |
| git:20260508.546b267 | 2026-05-08 | 546b267 | 1,988 B | A | view · diff |
| git:20251230.0645238 | 2025-12-30 | 0645238 | 2,154 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (1946 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
steipete/agent-scripts · 7,470 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_3nh2detvxct7pd7p GET https://markdownregistry.com/api/v1/resolve?ref=steipete/agent-scripts/native-app-performance GET https://markdownregistry.com/api/v1/blob/0c8a67d976b271b50ed3974ee8c6d0f8e01d067f7a12d0f125b6784511b9cff4
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.