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 blockmatic/basilic --skill expo-upgrading-v55git 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/skills/blockmatic/basilic/expo-upgrading-v55)<a href="https://agentmods.dev/skills/blockmatic/basilic/expo-upgrading-v55"><img src="https://agentmods.dev/badge/skills/blockmatic/basilic/expo-upgrading-v55/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/blockmatic/basilic/expo-upgrading-v55"><img src="https://agentmods.dev/badge/skills/blockmatic/basilic/expo-upgrading-v55.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00037 | $0.01689 |
| Opus 5 | $0.00018 | $0.00844 |
| Sonnet 5 | $0.00007 | $0.00338 |
| Haiku 4.5 | $0.00004 | $0.00169 |
Grade C, and why
expo-upgrading-v55 scanned grade C 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 5d 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf node_modules .expo This is a copy
95% identical to expo-upgrade — 10 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
References
- ./references/react-19.md -- SDK +54: React 19 changes (useContext → use, Context.Provider → Context, forwardRef removal)
- ./references/new-architecture.md -- SDK +53: New Architecture migration guide
- ./references/react-compiler.md -- SDK +54: React Compiler setup and migration guide
- ./references/native-tabs.md -- SDK +55: Native tabs changes (Icon/Label/Badge now accessed via NativeTabs.Trigger.*)
- ./references/expo-av-to-audio.md -- SDK +55: Migrate audio playback and recording from expo-av to expo-audio
- ./references/expo-av-to-video.md -- SDK +55: Migrate video playback from expo-av to expo-video
- ./references/react-navigation-to-expo-router.md -- SDK +56: Migrate
@react-navigation/*imports toexpo-routerentry points (codemod + manual mapping)
Beta/Preview Releases
Beta versions use .preview suffix (e.g., 55.0.0-preview.2), published under @next tag.
Check if latest is beta: https://exp.host/--/api/v2/versions (look for -preview in expoVersion)
npx expo install expo@next --fix # install beta
Step-by-Step Upgrade Process
If upgrading from SDK 55 or earlier, skip SDK 56 and upgrade directly to SDK 57. Don't use
[email protected]or below. SDK 55 with Hermes V1 enabled, SDK 56, and older SDK 57 releases contain a Hermes V1 memory regression that can drastically increase memory usage when usingreact-native-workletsorreact-native-reanimated.
- Upgrade Expo and dependencies
npx expo install expo@latest
npx expo install --fix
-
Run diagnostics:
npx expo-doctor -
Clear caches and reinstall
npx expo export -p ios --clear
rm -rf node_modules .expo
watchman watch-del-all
Breaking Changes Checklist
- Check for removed APIs in release notes
- Update import paths for moved modules
- Review native module changes requiring prebuild
- Test all camera, audio, and video features
- Verify navigation still works correctly
Prebuild for Native Changes
First check if ios/ and android/ directories exist in the project. If neither directory exists, the project uses Continuous Native Generation (CNG) and native projects are regenerated at build time — skip this section and "Clear caches for bare workflow" entirely.
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.
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.
- 5d ago First seen · 149 lines · 37 tokens per session scan C 78fe28db2e23
expo-upgrading-v55 is a skill published in the GitHub repository blockmatic/basilic (89 stars, last pushed yesterday), licensed MIT. It adds 37 tokens to every session and 1,689 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). It is 95% identical to expo-upgrade, differing in 10 lines, and is treated as a copy.
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