svelte-vitals: Instructions file for Codex

AGENTS.md

svelte-vitals AGENTS.md is an instructions file for Codex, OpenCode from oekazuma/svelte-vitals. It costs 4,323 tokens per session, scanned A, original, MIT.

Repository instructions for Svelte Vitals, a checker that reviews SvelteKit source code for issues in areas such as SEO, performance, security, and accessibility. It examines code without running the application.

In plain words
What is it for?
Use them when changing the checker, its packages, its command-line interface, or its tests and verification workflow.
Why use it?
They explain the project structure and the commands needed to build, type-check, test, and verify the checker across supported projects.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is oekazuma/svelte-vitals's own configuration. It tells Codex and OpenCode how to work on svelte-vitals itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything svelte-vitals configures →

Reuse

Borrowing it

Nothing to install: this file belongs to oekazuma/svelte-vitals. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/oekazuma/svelte-vitals/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/oekazuma/svelte-vitals

Made for: Codex, OpenCode.

Wrote 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.

agentmods badge for svelte-vitals AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/oekazuma/svelte-vitals/agents-md/github.svg)](https://agentmods.dev/instructions/oekazuma/svelte-vitals/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/oekazuma/svelte-vitals/agents-md"><img src="https://agentmods.dev/badge/instructions/oekazuma/svelte-vitals/agents-md/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.

agentmods 80×15 button for svelte-vitals AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/oekazuma/svelte-vitals/agents-md"><img src="https://agentmods.dev/badge/instructions/oekazuma/svelte-vitals/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 4,323 This file is loaded in full into every session.
When invoked 4,323 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.04323 $0.04323
Opus 5 $0.02161 $0.02161
Sonnet 5 $0.00865 $0.00865
Haiku 4.5 $0.00432 $0.00432

Measured 4d ago against content hash ef51b42d8e58, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

svelte-vitals 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 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.

AGENTS.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Repository conventions for AI agent sessions. Read this before exploring the codebase — it exists so you don't have to rediscover (or guess) these facts every session.

What this is

svelte-vitals is a static code-health checker for SvelteKit — not a runtime Web Vitals reporter. It statically analyzes source code (resolved <head> metadata and component bodies) across six categories: SEO, Performance, Correctness, Security, Architecture, Accessibility. The project is pre-1.0 (all packages are on 0.x versions).

Verify commands

Purpose Command Notes
Build pnpm build pnpm -r build
Typecheck pnpm typecheck pnpm -r typecheck
Test pnpm test pnpm build && pnpm -r test (vitest) — builds first because packages/cli's tests import @svelte-vitals/core from its built dist
Floor smoke pnpm smoke needs pnpm build first — it runs the built dist under a bare node; locally that is the devEngines Node, not the floor, so the floor claim is what CI's floor-smoke job (pinned to 24.16.0) adds
Ecosystem pnpm ecosystem needs pnpm build first — clones the third-party SvelteKit apps listed in scripts/ecosystem-smoke.js and asserts only "no crash, exit ∈ {0,1}, report parses"; scheduled weekly, never PR-blocking
Lint pnpm lint oxlint . + oxfmt --check . + pnpm lint:docs (textlint @textlint-ja/preset-ai-writing plus a curated preset-ja-technical-writing over READMEs, packages/cli/docs/, and the docs site's .md pages — .mdx pages are not linted. Config in .textlintrc.json; its disabled rules were each measured noisy on this corpus, so don't re-enable one without re-measuring)
Format pnpm format oxfmt --write .
Publish checks pnpm check:publish publint + attw (--profile esm-only)

Read the full file on GitHub · 157 lines

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. 4d ago Changed · -13 tokens per session ef51b42d8e58
  2. 9d ago First seen · 157 lines · 4,336 tokens per session scan A bc2987d4ed48

Subscribe to this mod's changes

svelte-vitals AGENTS.md is an instructions file published in the GitHub repository oekazuma/svelte-vitals (20 stars, last pushed yesterday), licensed MIT. It adds 4,323 tokens to every session, about $0.0216 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.

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