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.
git clone --depth 1 https://github.com/blockmatic/basilicWrote 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/rules/blockmatic/basilic/expo)<a href="https://agentmods.dev/rules/blockmatic/basilic/expo"><img src="https://agentmods.dev/badge/rules/blockmatic/basilic/expo.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00000 | $0.00331 |
| Opus 5 | $0.00000 | $0.00166 |
| Sonnet 5 | $0.00000 | $0.00066 |
| Haiku 4.5 | $0.00000 | $0.00033 |
Grade A, and why
expo 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 3d 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.
What it actually says
Expo Router
File-based routing: src/app/, _layout.tsx, route groups (group). _layout cannot be DOM component—see @.agents/skills/expo-use-dom-v55
NativeTabs (SDK 55+)
Use NativeTabs.Trigger.Icon, NativeTabs.Trigger.Label, NativeTabs.Trigger.Badge (not separate imports). See @.agents/skills/expo-upgrading-v55/references/native-tabs.md
React Native
Primitives only: View, Text, Pressable, ScrollView—no HTML elements
Styling
Tailwind via NativeWind v5 + react-native-css. Use className on View, Text, Pressable, etc. StyleSheet for complex cases. See @.agents/skills/expo-tailwind-setup-v55
Platform extensions
Use .web.tsx, .native.tsx for platform-specific code
Path aliases
@/* → src/, @/assets/* → assets/
Hooks
Kebab-case filenames, collocated in hooks/. See @.cursor/rules/frontend/react-hooks.mdc
React Compiler
Enabled in app.json—no manual useMemo/useCallback. Aligns with @.cursor/rules/frontend/react-hooks.mdc
EAS / CI
EAS builds: mobile-build (manual), mobile-preview (main), mobile-pr-preview (EAS Update). EXPO_TOKEN required.
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.
- 3d ago First seen · 33 lines · 0 tokens per session scan A 12c7d37301a5
expo is a cursor rule published in the GitHub repository blockmatic/basilic (89 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 331 tokens. 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 2026-09-03.
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