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 tjdrhs90/rn-launch-harness --skill rn-harness-build-localgit clone --depth 1 https://github.com/tjdrhs90/rn-launch-harnessWrote 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/tjdrhs90/rn-launch-harness/rn-harness-build-local)<a href="https://agentmods.dev/skills/tjdrhs90/rn-launch-harness/rn-harness-build-local"><img src="https://agentmods.dev/badge/skills/tjdrhs90/rn-launch-harness/rn-harness-build-local/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/tjdrhs90/rn-launch-harness/rn-harness-build-local"><img src="https://agentmods.dev/badge/skills/tjdrhs90/rn-launch-harness/rn-harness-build-local.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 | $0.00072 | $0.02925 |
| Opus 5 | $0.00036 | $0.01463 |
| Sonnet 5 | $0.00014 | $0.00585 |
| Haiku 4.5 | $0.00007 | $0.00293 |
Grade C, and why
rn-harness-build-local 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 11d 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.
> - **Clear the folder first**, leave only the final images: `rm -rf fastlane/screenshots/* && cp <final PNGs> fastlane/screenshots/` How it starts
The opening of the file, as written. The whole thing — 268 lines — stays where its author put it; the contents beside it link to each section on GitHub.
rn-harness-build-local — Phase 8 (alt): EAS-free Build & Deploy
Build and ship without EAS. Use this instead of rn-harness-build + the EAS parts of rn-harness-submit when the user cannot use EAS — most commonly because the EAS free plan is full (3-project limit reached) or they simply don't want the dependency.
When to use this instead of EAS
The orchestrator (or the user) picks the build method at the start of Phase 8:
| Situation | Path |
|---|---|
| EAS account has a free project slot, wants managed credentials/OTA | rn-harness-build (default) |
| EAS free plan full (3 projects) / declined EAS / wants full local control | this skill |
EAS free plan allows a limited number of projects per account. Once full,
eas initon a new app fails. This path needs no EAS project at all.
Trigger
Called by the orchestrator as Phase 8 when build method = local.
Input
- Project code (AdMob integration complete)
docs/harness/config.md
Prerequisites
- Android: JDK 17, Android SDK (
ANDROID_HOMEset), Gradle (bundled via wrapper) - iOS: macOS + Xcode + CocoaPods, an Apple Developer account
- fastlane (
brew install fastlaneorgem install fastlane) — used for iOS signing + upload - No EAS account required
Process
Step 1: Prebuild (generate native projects)
Expo managed projects have no android/ / ios/ folders until prebuilt. Generate them:
# Clean native projects from app.config.ts (idempotent)
npx expo prebuild --clean
This creates android/ and ios/ with the correct bundle id, icons, splash, and plugin config. Re-run after any app.config.ts change.
OTA note:
expo-updatesin a non-EAS setup needs a self-hosted update endpoint (see Step 6). If OTA is not needed, removeexpo-updatesfrom plugins before prebuild to avoid a build-timeupdates.urlrequirement.
Step 2: Android Signing Keystore (ASK FIRST)
Same rule as the EAS path — never silently generate a keystore. A local Gradle release build requires a keystore; there is no cloud fallback.
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.
- 11d ago First seen · 268 lines · 72 tokens per session scan C 841091dc665b
rn-harness-build-local is a skill published in the GitHub repository tjdrhs90/rn-launch-harness (9 stars, last pushed 10d ago), licensed MIT. It adds 72 tokens to every session and 2,925 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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