typegen

A command workflow for Sanity TypeGen, which generates TypeScript types from Sanity schemas and queries. TypeScript types describe the shape of data so code can catch mismatches earlier.

In plain words
What is it for?
Use it after changing Sanity schemas or queries, or when setting up and troubleshooting type generation in a Sanity project.
Why use it?
It helps resolve missing schemas, incorrect file paths, outdated generated types, untyped queries, and deprecated configuration.

Command

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 commands/sanity-io/agent-toolkit/typegen
Clone the repo
git clone --depth 1 https://github.com/sanity-io/agent-toolkit
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 464 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 $0.00014 $0.00464
Opus 5 $0.00007 $0.00232
Sonnet 5 $0.00003 $0.00093
Haiku 4.5 $0.00001 $0.00046

Measured yesterday against content hash 2cb7f1897fcc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

typegen 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 yesterday.

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.

commands/typegen.md · 70 lines

What it actually says

Sanity TypeGen Workflow

I'll help you generate TypeScript types from your Sanity schema.

Quick Start

npm run typegen
# or
npx sanity schemas extract && npx sanity typegen generate

What I'll Do

  1. Check Configuration

    • Check for typegen config in sanity.cli.ts (recommended)
    • If using deprecated sanity-typegen.json, suggest migrating to sanity.cli.ts
    • Ensure typegen script is in package.json (for manual workflows)
  2. Run TypeGen

    • Execute the typegen command
    • Report any errors
  3. Troubleshoot Issues

    • Fix incorrect path globs
    • Resolve schema syntax errors
    • Update query imports
    • Migrate deprecated sanity-typegen.json to sanity.cli.ts

Common Issues I Fix

Issue Solution
"No schema found" Fix path glob in sanity.cli.ts typegen config
"Query not typed" Wrap in defineQuery() or groq template
Types outdated Re-run after schema/query changes, or enable automatic generation
Import errors Check sanity.types.ts output path
Using sanity-typegen.json Migrate config to sanity.cli.ts (deprecated)

Configuration

Configure TypeGen in sanity.cli.ts:

// sanity.cli.ts
import { defineCliConfig } from 'sanity/cli'

export default defineCliConfig({
  typegen: {
    enabled: true, // Auto-generate during sanity dev/build
    path: "./src/**/*.{ts,tsx,js,jsx,astro,svelte,vue}",
    schema: "schema.json",
    generates: "./sanity.types.ts",
    overloadClientMethods: true,
  },
})

Usage

"Run typegen" "Fix my TypeGen configuration" "Why are my types not updating?" "Enable automatic type generation"

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. yesterday First seen · 70 lines · 14 tokens per session scan A 2cb7f1897fcc

Subscribe to this mod's changes

typegen is a command published in the GitHub repository sanity-io/agent-toolkit (180 stars, last pushed 6d ago), licensed MIT. It adds 14 tokens to every session and 464 once invoked, about $0.0001 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.