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/barrosohub/frontend-stack-blueprint/agents-mdgit clone --depth 1 https://github.com/barrosohub/frontend-stack-blueprintWrote 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/barrosohub/frontend-stack-blueprint/agents-md)<a href="https://agentmods.dev/instructions/barrosohub/frontend-stack-blueprint/agents-md"><img src="https://agentmods.dev/badge/instructions/barrosohub/frontend-stack-blueprint/agents-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 | $0.01730 | $0.01730 |
| Opus 5 | $0.00865 | $0.00865 |
| Sonnet 5 | $0.00346 | $0.00346 |
| Haiku 4.5 | $0.00173 | $0.00173 |
Grade A, and why
frontend-stack-blueprint AGENTS.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 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.
How it starts
The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Stack Blueprint
Canonical frontend stack for any new project. Platform-agnostic. Deployment targets (Cloudflare Workers/Pages, Vercel, Electron, Tauri, PWA) are optional add-ons.
Stack (ALL projects)
TypeScript ≥7 strict · React ≥19.2.7 · TanStack Router ≥1 (or React Router ≥8)
pnpm ≥11.18 · Node.js 24 LTS (minimum 22.22) · Bun ≥1 (runtime alternative)
Vite ≥8 · Vitest ≥4 · Playwright ≥1.61 for deployed UI · protected CI merge gate
Husky + lint-staged + ESLint + Prettier
Base UI (default) · Radix/React Aria (alternatives) · shadcn/ui · Floating UI · Embla · cmdk
Tailwind CSS ≥4 + clsx + tailwind-merge · Motion (import from 'motion/react')
DESIGN.md Design Contract (provisional, optional): root DESIGN.md → generated Tailwind 4 tokens
React Hook Form + Zod · date-fns ≥4.1 (+@date-fns/tz)
Data Access (optional): Prisma ≥7
Authentication (optional): Better Auth ≥1
Managed Services (optional): Neon Postgres | Cloudflare D1 | Cloudflare R2 | Cloudflare KV | Resend
Zustand · TanStack Query ≥5.60 (TanStack Store remains under evaluation)
Lexical (primary) · ProseMirror (fallback) · Shiki
Advanced Capabilities (optional): Markdown · TanStack Table · Recharts · Mermaid · CodeMirror · xterm/node-pty · Yjs · PDF.js
Format.js · react-intl · Sentry / OpenTelemetry / Statsig (capability-gated)
Icons: Lucide (default) | Phosphor | Tabler
Architecture (MANDATORY)
Feature-based modules · Strong typing (no any) · DRY · KISS · YAGNI
Composition > inheritance · Logic in hooks · Tests required (Vitest)
Protected CI required · Husky optional · React Compiler 1.x opt-in after compatibility checks
Always cn() for Tailwind classes · Always @/* path aliases
Production Reliability (MANDATORY by applicable profile)
CI is authoritative: frozen lockfile · typecheck · lint · unit/integration · production build · critical E2E WCAG 2.2 AA: axe automation + keyboard/focus/zoom/reflow + manual screen-reader journey Field targets: LCP ≤2.5s · INP ≤200ms · CLS ≤0.1 at p75; route-aware asset budgets required Browser target: Baseline Widely Available by default + explicit matrix and progressive enhancement Networked UI: typed env · fetch + AbortSignal/timeout · Zod responses · MSW degraded scenarios Production operation: preview smoke · immutable release ID · privacy policy · rollout + rollback runbook
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 · 143 lines · 1,730 tokens per session scan A 252bd6d3e27f
frontend-stack-blueprint AGENTS.md is an instructions file published in the GitHub repository barrosohub/frontend-stack-blueprint (3 stars, last pushed 1mo ago), licensed MIT. It adds 1,730 tokens to every session, about $0.0086 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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cli AGENTS.md
AGENTS.md instructions for jumbocontext/cli, covering agents.md and instructions for agents on how to collaborate with jumbo.
symphony AGENTS.md
Instructions for broomva/symphony, covering agents.md - symphony, repository purpose, architecture, key design decisions and gathering context from the knowledge graph.