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 react-navigationgit 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/react-navigation)<a href="https://agentmods.dev/skills/callstackincubator/agent-skills/react-navigation"><img src="https://agentmods.dev/badge/skills/callstackincubator/agent-skills/react-navigation/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/react-navigation"><img src="https://agentmods.dev/badge/skills/callstackincubator/agent-skills/react-navigation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.00039 | $0.00638 |
| Opus 5.5 | $0.00016 | $0.00255 |
| Sonnet 5.5 | $0.00008 | $0.00128 |
| Haiku 4.5 | $0.00004 | $0.00064 |
Grade A, and why
react-navigation scanned grade A with 0 findings 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.
React Navigation
Overview
Guide for building navigation UIs with React Navigation.
This skill only applies to React Navigation 7. The API and patterns may not work with different versions.
API Selection
React Navigation offers two API - object-based Static API and component-based Dynamic API.
- Existing Apps: Check the current navigation setup and follow the same API style when using the references
- New Apps: If the app does not have an existing navigation setup yet, prefer
Static API
When to Apply
Reference this skill when:
- Building navigation UI patterns such as stacks, tabs, drawers, sheets etc.
- Configuring headers and other built-in navigator UI
- Handling safe areas and insets in navigation UI
References
| File | Description |
|---|---|
| [stacks.md][stacks] | Stack based navigation |
| [form-sheet.md][form-sheet] | Bottom sheet and form sheets |
| [bottom-tabs.md][bottom-tabs] | Cross-platform bottom tabs |
| [native-bottom-tabs.md][native-bottom-tabs] | Native bottom tabs |
| [material-top-tabs.md][material-top-tabs] | Swipeable Top tabs |
| [drawers.md][drawers] | Drawer navigation and sidebars |
| [header.md][header] | Configuring headers |
| [safe-areas.md][safe-areas] | Safe-area handling |
Problem -> Skill Mapping
| Problem | Start With |
|---|---|
| Showing screens and modals in a stack | [stacks.md][stacks] |
| Showing bottom sheets or form sheets | [form-sheet.md][form-sheet] |
| Showing screens in bottom tabs or responsive sidebars with web support | [bottom-tabs.md][bottom-tabs] |
| Showing screens in native tabs on iOS & Android | [native-bottom-tabs.md][native-bottom-tabs] |
| Showing content in swipeable top tabs | [material-top-tabs.md][material-top-tabs] |
| Using a drawer or sidebar | [drawers.md][drawers] |
| Configuring the header in bottom tab or drawer navigator | [header.md][header] |
| Handling safe-area such as status bar, header insets, tab bar insets etc. | [safe-areas.md][safe-areas] |
What ships with it
9 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.
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 · 64 lines · 39 tokens per session scan A f127331ac68f
react-navigation is a skill published in the GitHub repository callstackincubator/agent-skills (1,672 stars, last pushed 7d ago), licensed MIT. It adds 39 tokens to every session and 638 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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