rn-performance SKILL.md skillA
rn-performance from anilburcu/claude-code-react-native is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add anilburcu/claude-code-react-native/rn-performance@git:20260911.98ac3cbPins git:20260911.98ac3cb in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- anilburcu/claude-code-react-native
- Path
plugins/rn/skills/rn-performance/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260911.98ac3cb, committed Sep 11, 2026
- First version recorded
- Jul 28, 2026
- Size
- 4,304 bytes
- Repository stars
- 3
- License
- MIT
Diagnosing and fixing React Native performance problems. Use for slow lists, janky animations, slow startup, excessive re-renders, or a sluggish app: FlashList, Reanimated, images, startup, profiling.
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
# Performance triage ## Two rules before touching code 1. Profile release builds. Dev mode runs a different engine configuration with dev-only checks; its performance characteristics are fiction. `npx expo run:ios --configuration Release` or `npx expo run:android --variant release` before believing any measurement. 2. Name the thread. Everything slow is one of: JS thread saturated, UI thread saturated, or waiting on IO. The fix lives on the thread that is busy, and the profiler tells you which one it is; guessing does not. ## Lists - Long scrollable content belongs in FlashList (or at minimum FlatList), never a ScrollView with `.map()`. ScrollView mounts everything immediately; past a few dozen items that is the entire problem. - renderItem must be a stable component reference, not an inline closure creating new component trees per render. Extract it, memo it, and keep item props primitive where possible. - keyExtractor must return stable ids. Index keys plus insertions equals recycled rows showing the wrong content and pointless re-renders. …
Read the whole file at its exact version.
How to install
mdr add anilburcu/claude-code-react-native/rn-performance@sha256:bf603a16d3a93ac8The line at the top of this page pins the label git:20260911.98ac3cb, 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_23mann7b7exqtrzl)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jul 28, 2026 and Sep 11, 2026, about one every 45 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260911.98ac3cb latest | 2026-09-11 | 98ac3cb | 4,304 B | A | view · diff |
| git:20260728.436a435 | 2026-07-28 | 436a435 | 4,369 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 (4304 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
anilburcu/claude-code-react-native · 3 stars · license MIT · pushed 2026-09-11 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_23mann7b7exqtrzl GET https://markdownregistry.com/api/v1/resolve?ref=anilburcu/claude-code-react-native/rn-performance GET https://markdownregistry.com/api/v1/blob/bf603a16d3a93ac8d6c94b32cae6da285b00fc0842e46bf2a1a10701157679c5
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.