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/first-fluke/fullstack-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/rules/first-fluke/fullstack-starter/frontend)<a href="https://agentmods.dev/rules/first-fluke/fullstack-starter/frontend"><img src="https://agentmods.dev/badge/rules/first-fluke/fullstack-starter/frontend/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/rules/first-fluke/fullstack-starter/frontend"><img src="https://agentmods.dev/badge/rules/first-fluke/fullstack-starter/frontend.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 | $0.00000 | $0.01303 |
| Opus 5.5 | $0.00000 | $0.00521 |
| Sonnet 5.5 | $0.00000 | $0.00261 |
| Haiku 4.5 | $0.00000 | $0.00130 |
Grade A, and why
frontend 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 4d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- frontend — 94% identical, 13 lines differ
How it starts
The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Coding Standards
Core Rules
Apply framework-specific rules only to that framework. Existing project choices take precedence over starter defaults; scoped changes do not authorize migrations.
- Component Reuse: Use
shadcn/uicomponents first. Extend viacvavariants or composition. Avoid custom CSS. - Design Fidelity: Code must map 1:1 to
DESIGN.md(Section 9 — Agent Prompt Guide) and Design Tokens. Resolve discrepancies before implementation. - Rendering Strategy: Default to Server Components for performance. Use Client Components only for interactivity and API integration.
- Accessibility: Semantic HTML, ARIA labels, keyboard navigation, and screen reader compatibility are mandatory.
- Tool First: Check for existing solutions and tools before coding.
- Request proxy convention: when the target project uses Next.js 16+ with
proxy.ts, preserve that convention. Check the installed framework version and routing before recommending a file rename. Diagnose wiring from code and tests. - No Prop Drilling: Avoid passing props beyond 3 levels. Use the project's client-state library (Jotai atoms or a Zustand store — see oma-frontend
resources/tech-stack.md) instead. Avoid React Context. - Auth Boundary: Client code must not import database adapters or server-only auth code. Keep server-side application logic in the project's existing server boundary.
- Animation library: preserve the project's existing animation library for scoped edits. For new motion-based implementations, use the
motionpackage andmotion/reactimports. - Framework version: preserve the installed framework and dependency ranges for scoped changes. Select versions when scaffolding or when an upgrade is explicitly requested; do not upgrade an existing app to satisfy a starter default.
Architecture (FSD-lite)
- Root (
src/): Shared logic (components, lib, types). Hoist common code here. - Feature (
src/features/*/): Feature-specific logic. No cross-feature imports. Unidirectional flow only.
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.
- 4d ago Changed b1dbe6ab4e2a
- 1mo ago Changed · +2 lines d1d51ab9e5ae
- 1mo ago First seen · 82 lines · 0 tokens per session scan A 826e1cce3768
frontend is a cursor rule published in the GitHub repository first-fluke/fullstack-starter (224 stars, last pushed 5d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,303 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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angular-20
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dev-standard
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prefer-assertions-over-defensive-checks
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prefer-direct-imports-over-module-mocks
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