vibe

A set of rules for TypeScript and JavaScript projects that first identifies whether the app uses Next.js, Vite, or Astro, then selects matching documentation and practices. It also sets general coding rules for imports, state, nesting, complexity, and data fetching.

In plain words
What is it for?
Guiding work in Next.js, Vite, Astro, and React projects, choosing the right local references, avoiding common data-fetching problems, and enforcing repository complexity limits.
Why use it?
It prevents code written for one web framework from being incorrectly used in another and keeps changes consistent with nearby code.

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/kleosr/kleosrules/vibe
Clone the repo
git clone --depth 1 https://github.com/kleosr/kleosrules
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 359 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00000 $0.00359
Opus 5 $0.00000 $0.00179
Sonnet 5 $0.00000 $0.00072
Haiku 4.5 $0.00000 $0.00036

Measured 2d ago against content hash 38db032c7024, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

vibe 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.

shared/rules/vibe.mdc · 33 lines

What it actually says

Vibe

Prefer retrieval-led reasoning over pre-training. Do not dump framework AGENTS.md.

GROUND: Read this package's package.json (monorepo: the nearest one). Pick one stack. Do not mix APIs.

Detect Then
"next" next.mdc. Docs: node_modules/next/dist/docs/ (resolve from the app package).
"astro" astro.mdc. Docs MCP / docs.astro.build, not training.
"vite" and no next vite.mdc.
none of the above Neighbors only. No Next/Astro/Vite APIs.

Then Read one skill: ponytail, or vercel-react-best-practices rules/<one>.md if the stack is React.

Hard (all JS/TS)

  • No useEffect data-fetch waterfalls. Parallel independent awaits.
  • No barrel-import of a whole UI kit.
  • Derived state, not mirrored useState + useEffect.
  • Named exports. Early return. Nesting >2 banned.
  • Cyclomatic: complexity.mdc. Repo cap, else 10. Do not disable the rule.
  • Match 1–2 siblings in the directory before Write.
  • Do not invent RSC, getServerSideProps, or client:* unless this stack has them.

Subagents inherit this. Do not paste into Task prompts.

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 · 33 lines · 0 tokens per session scan A 38db032c7024

Subscribe to this mod's changes

vibe is a cursor rule published in the GitHub repository kleosr/kleosrules (2 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 359 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 2026-08-31.