What is sanity-best-practices?

A reference guide for building Sanity projects, where Sanity is a content-management system for storing and editing structured website content.

Use it when setting up Sanity, building its Studio, querying content, adding previews or localization, migrating data, or connecting frameworks such as Next.js, Nuxt, Astro, or Remix.

It helps prevent common mistakes when designing content schemas, writing GROQ queries, connecting front-end frameworks, or managing content changes.

sanity-best-practices — Skill for Claude Code by sanity-io

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.

Any agent

npx skills add sanity-io/agent-toolkit --skill sanity-best-practices

Clone the repo

git clone --depth 1 https://github.com/sanity-io/agent-toolkit

Made for: Claude Code.

Or install sanity, the plugin that ships this one along with the rest of its 7 skills, 4 commands, 1 MCP server.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/sanity-io/agent-toolkit/sanity-best-practices/github.svg)](https://agentmods.dev/skills/sanity-io/agent-toolkit/sanity-best-practices)

Your own site

<a href="https://agentmods.dev/skills/sanity-io/agent-toolkit/sanity-best-practices"><img src="https://agentmods.dev/badge/skills/sanity-io/agent-toolkit/sanity-best-practices/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/sanity-io/agent-toolkit/sanity-best-practices"><img src="https://agentmods.dev/badge/skills/sanity-io/agent-toolkit/sanity-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 164 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,156 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

Socket pass 13 Apr 2026
Snyk warn 13 Apr 2026
NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00164	$0.01156
Opus 5	$0.00082	$0.00578
Sonnet 5	$0.00033	$0.00231
Haiku 4.5	$0.00016	$0.00116

Measured 9d ago against content hash 39c6413b567b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

sanity-best-practices 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 9d 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

4 near-identical copies found in the catalogue:

sanity-best-practices — 91% identical, 26 lines differ
sanity-best-practices — 91% identical, 26 lines differ
sanity-best-practices — 89% identical, 13 lines differ
sanity-best-practices — 88% identical, 15 lines differ

skills/sanity-best-practices/SKILL.md · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Sanity Best Practices

Comprehensive best practices and integration guides for Sanity development, maintained by Sanity. Use the quick reference below to load only the one or two topic files that match the task.

When to Apply

Reference these guidelines when:

Setting up a new Sanity project or onboarding
Integrating Sanity with a frontend framework (Next.js, Nuxt, Astro, Remix, SvelteKit, Hydrogen)
Writing GROQ queries or optimizing performance
Designing content schemas
Implementing Visual Editing and live preview
Working with images, Portable Text, or page builders
Configuring Sanity Studio structure
Setting up TypeGen for type safety
Implementing localization
Migrating content from other systems
Building custom apps with the Sanity App SDK
Managing infrastructure with Blueprints
Automating content workflows with Sanity Functions or webhooks

Global Rules

Let Sanity generate _id values for ordinary documents. Do not create deterministic UUIDs, slug-derived IDs, or legacy-system IDs when creating documents.
Model relationships with reference fields, then resolve related documents with GROQ lookups, source-key fields, or returned _id values from created documents.
Use explicit document IDs mainly for singleton documents controlled by Studio Structure, including localized singletons such as homePage-en.

Video

Do not store or serve video from Sanity file assets for production playback. File assets are delivered as raw downloads with no transcoding or adaptive streaming, and video traffic drives very high bandwidth usage and unexpectedly large bills.
On Enterprise plans with the video add-on, use Sanity Media Library for video: uploads are transcoded and streamed adaptively via Mux. Model video fields with defineVideoField() from sanity/media-library and play them with @mux/mux-player-react using the asset's playback ID.
On other plans, use a dedicated video service: install sanity-plugin-mux-input to upload and manage videos in your Mux account from the Studio, or host video on a platform such as YouTube or Vimeo and store only the embed URL in Sanity.
Small clips and short previews in a file field are acceptable, but any user-facing video at scale must go through Media Library or a streaming service.

Read the full file on GitHub · 87 lines

Files

What ships with it

24 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

9d ago First seen · 87 lines · 164 tokens per session scan A 39c6413b567b

Subscribe to this mod's changes

sanity-best-practices is a skill published in the GitHub repository sanity-io/agent-toolkit (182 stars, last pushed 4d ago), licensed MIT. It adds 164 tokens to every session and 1,156 once invoked, about $0.0008 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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