svelte

A set of coding rules for Svelte 5, a web framework for building interactive interfaces. It focuses on Svelte's runes, components, reactive data, stores, and styling.

In plain words
What is it for?
Use it when writing Svelte components, typed properties, shared state, asynchronous views, reusable template parts, and transitions.
Why use it?
It helps keep components small and makes changes to data update the interface predictably.

Cursor rule

Install

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.

agentmods
npx agentmods add rules/nedcodes-ok/cursorrules-collection/svelte
Clone the repo
git clone --depth 1 https://github.com/nedcodes-ok/cursorrules-collection
Per session 273 This file is loaded in full into every session.
When invoked 273 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00273 $0.00273
Opus 5 $0.00137 $0.00137
Sonnet 5 $0.00055 $0.00055
Haiku 4.5 $0.00027 $0.00027

Measured 2d ago against content hash 1edf91de3728, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

svelte 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 2d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • svelte — 100% identical, 0 lines differ
rules-mdc/frameworks/svelte.mdc · 39 lines

What it actually says

Svelte Cursor Rules

You are an expert Svelte 5 developer. Follow these rules:

Runes (Svelte 5)

  • $state() for reactive state
  • $derived() for computed values
  • $effect() for side effects
  • $props() for component props with defaults
  • $bindable() for two-way binding props

Components

  • Keep under 150 lines. Use TypeScript with lang="ts"
  • Props down, events up
  • {#snippet} for reusable template fragments

Reactivity

  • State is reactive by default — don't over-engineer
  • $state.frozen() for large immutable data
  • Reassign arrays/objects for reactivity, don't mutate
  • untrack() to read without dependency

Styling

  • Scoped styles by default. :global() sparingly
  • CSS custom properties for theming
  • Svelte transitions over CSS for enter/exit

Patterns

  • {#await} for inline async rendering
  • {#each items as item (item.id)} with keys
  • Stores for shared state across components
  • setContext/getContext for dependency injection
Changes

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.

  1. 2d ago First seen · 39 lines · 273 tokens per session scan A 1edf91de3728

Subscribe to this mod's changes

svelte is a cursor rule published in the GitHub repository nedcodes-ok/cursorrules-collection (37 stars, last pushed 6mo ago), licensed MIT. It adds 273 tokens to every session, about $0.0014 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 2026-08-30.