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 agentmods add instructions/brainbytes-dev/nextjs-expo-saas-starter/claude-mdgit clone --depth 1 https://github.com/brainbytes-dev/nextjs-expo-saas-starterWrote 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/instructions/brainbytes-dev/nextjs-expo-saas-starter/claude-md)<a href="https://agentmods.dev/instructions/brainbytes-dev/nextjs-expo-saas-starter/claude-md"><img src="https://agentmods.dev/badge/instructions/brainbytes-dev/nextjs-expo-saas-starter/claude-md.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 | $0.02183 | $0.02183 |
| Opus 5 | $0.01092 | $0.01092 |
| Sonnet 5 | $0.00437 | $0.00437 |
| Haiku 4.5 | $0.00218 | $0.00218 |
Grade A, and why
nextjs-expo-saas-starter CLAUDE.md 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 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.
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 — 180 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Project Overview
SaaS monorepo with a Next.js 16 web app and Expo React Native mobile app. Turborepo for orchestration, pnpm workspaces.
Monorepo Structure
apps/
web/ Next.js 16 — shadcn/ui, Better-Auth, Stripe, Inngest
mobile/ Expo Router — NativewindUI, RevenueCat, Better-Auth (HTTP)
packages/
db/ @repo/db — Drizzle ORM + PostgreSQL schema
email/ @repo/email — React Email templates (Resend)
shadcn-ui/ @repo/shadcn-ui — Web UI components (Radix + Tailwind v4)
nativewindui/ @repo/nativewindui — Mobile UI components (NativeWind)
typescript-config/ Shared tsconfig presets
eslint-config/ Shared ESLint rules
Commands
pnpm dev # Start all apps (Turbo)
pnpm build # Build all packages + apps
pnpm lint # Lint everything
pnpm typecheck # TypeScript check (mobile skipped — RN types incomplete)
pnpm test # Run vitest (web only currently)
# Database (from root or packages/db)
pnpm db:generate # Generate Drizzle migrations
pnpm db:migrate # Run migrations
pnpm db:push # Push schema directly (dev)
pnpm db:studio # Open Drizzle Studio
# Mobile
cd apps/mobile && pnpm dev # Expo dev server
Tech Stack
| Layer | Web | Mobile |
|---|---|---|
| Framework | Next.js 16 (App Router) | Expo Router |
| UI | shadcn/ui (Radix + Tailwind v4) | NativewindUI (NativeWind) |
| Auth | Better-Auth (cookies, admin plugin) | Better-Auth via HTTP + AsyncStorage session |
| Payments | Stripe (checkout, portal, webhooks) | RevenueCat (IAP wrapper) |
| Database | Drizzle ORM + PostgreSQL | — (via web API) |
| Resend + React Email templates | — (via web API) | |
| Jobs | Inngest (event-driven + cron) | — |
| Rate Limit | Upstash Redis (sliding window, 10/min) | — |
| Analytics | PostHog (posthog-js) | PostHog (posthog-react-native) |
| Errors | Sentry (@sentry/nextjs) | Sentry (@sentry/react-native) |
| Tracing | OpenTelemetry (OTLP export) | — |
| Feature Flags | PostHog (server + client) | — |
| Canary/Rollout | Vercel Edge Config | — |
| Testing | Vitest + happy-dom | — |
| CI/CD | GitHub Actions → Turbo | GitHub Actions → EAS Build |
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 · 180 lines · 2,183 tokens per session scan A fca5e17817cf
nextjs-expo-saas-starter CLAUDE.md is an instructions file published in the GitHub repository brainbytes-dev/nextjs-expo-saas-starter (5 stars, last pushed 2mo ago), licensed MIT. It adds 2,183 tokens to every session, about $0.0109 per session on Opus 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 2026-08-31.
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