Callstack Agent Skills is a collection of instructions that gives AI coding assistants practical knowledge for building React Native applications. Developers use it for app development, performance, navigation, testing, CI, device automation, and migrations to React Native. The catalogue entries are the project's skills, rules, and instructions for compatible coding assistants.
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.
npx skills add callstackincubator/agent-skills --skill upgrading-react-nativegit clone --depth 1 https://github.com/callstackincubator/agent-skillsWrote 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.
[](https://agentmods.dev/skills/callstackincubator/agent-skills/upgrading-react-native)<a href="https://agentmods.dev/skills/callstackincubator/agent-skills/upgrading-react-native"><img src="https://agentmods.dev/badge/skills/callstackincubator/agent-skills/upgrading-react-native/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.
<a href="https://agentmods.dev/skills/callstackincubator/agent-skills/upgrading-react-native"><img src="https://agentmods.dev/badge/skills/callstackincubator/agent-skills/upgrading-react-native.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 38 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00083 | $0.00993 |
| Opus 5.5 | $0.00033 | $0.00397 |
| Sonnet 5.5 | $0.00017 | $0.00199 |
| Haiku 4.5 | $0.00008 | $0.00099 |
Grade A, and why
upgrading-react-native scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -L -f -o /tmp/rn-diff.diff \ How it starts
The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Upgrading React Native
Overview
Covers the full React Native upgrade workflow: template diffs via Upgrade Helper, dependency updates, Expo SDK steps, and common pitfalls.
Typical Upgrade Sequence
- Route: Choose the right upgrade path via [upgrading-react-native.md][upgrading-react-native]
- Diff: Fetch the canonical template diff using Upgrade Helper via [upgrade-helper-core.md][upgrade-helper-core]
- Dependencies: Assess and update third-party packages via [upgrading-dependencies.md][upgrading-dependencies]
- React: Align React version if upgraded via [react.md][react]
- Expo (if applicable): Apply Expo SDK layer via [expo-sdk-upgrade.md][expo-sdk-upgrade]
- Verify: Run post-upgrade checks via [upgrade-verification.md][upgrade-verification]
# Quick start: detect current version and fetch diff
npm pkg get dependencies.react-native --prefix "$APP_DIR"
npm view react-native dist-tags.latest
# Example: upgrading from 0.76.9 to 0.78.2
# 1. Fetch the template diff
curl -L -f -o /tmp/rn-diff.diff \
"https://raw.githubusercontent.com/react-native-community/rn-diff-purge/diffs/diffs/0.76.9..0.78.2.diff" \
&& echo "Diff downloaded OK" || echo "ERROR: diff not found, check versions"
# 2. Review changed files
grep -n "^diff --git" /tmp/rn-diff.diff
# 3. Update package.json, apply native changes, then install + rebuild
npm install --prefix "$APP_DIR"
cd "$APP_DIR/ios" && pod install
# 4. Validate: both platforms must build successfully
npx react-native build-android --mode debug --no-packager
xcodebuild -workspace "$APP_DIR/ios/App.xcworkspace" -scheme App -sdk iphonesimulator build
When to Apply
Reference these guidelines when:
- Moving a React Native app to a newer version
- Reconciling native config changes from Upgrade Helper
- Validating release notes for breaking changes
Quick Reference
| File | Description |
|---|---|
| [upgrading-react-native.md][upgrading-react-native] | Router: choose the right upgrade path |
| [upgrade-helper-core.md][upgrade-helper-core] | Core Upgrade Helper workflow and reliability gates |
| [upgrading-dependencies.md][upgrading-dependencies] | Dependency compatibility checks and migration planning |
| [react.md][react] | React and React 19 upgrade alignment rules |
| [expo-sdk-upgrade.md][expo-sdk-upgrade] | Expo SDK-specific upgrade layer (conditional) |
| [upgrade-verification.md][upgrade-verification] | Post-upgrade verification checklist, including agent-device-assisted checks |
| [monorepo-singlerepo-targeting.md][monorepo-singlerepo-targeting] | Monorepo and single-repo app targeting and command scoping |
What ships with it
8 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.
- agents/openai.yaml 248 B
- references/expo-sdk-upgrade.md 2.5 KB
- references/monorepo-singlerepo-targeting.md 1.0 KB
- references/react.md 1.5 KB
- references/upgrade-helper-core.md 6.5 KB
- references/upgrade-verification.md 2.4 KB
- references/upgrading-dependencies.md 2.2 KB
- references/upgrading-react-native.md 2.7 KB
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.
- 1mo ago First seen · 80 lines · 83 tokens per session scan A 5d81737d25e4
upgrading-react-native is a skill published in the GitHub repository callstackincubator/agent-skills (1,673 stars, last pushed 9d ago), licensed MIT. It adds 83 tokens to every session and 993 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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