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portable-text-conversion

Skill

Convert HTML and Markdown content into Portable Text blocks for Sanity. Use when migrating content from legacy CMSs, importing HTML or Markdown into Sanity, building content pipelines that ingest external content, converting rich text between formats, or programmatically creating Portable Text docum

0Content

Install

git clone https://github.com/sanity-io/agent-toolkit.git ~/.claude/skills/portable-text-conversion

What is portable-text-conversion?

Convert HTML and Markdown content into Portable Text blocks for Sanity. Use when migrating content from legacy CMSs, importing HTML or Markdown into Sanity, building content pipelines that ingest external content, converting rich text between formats, or programmatically creating Portable Text documents. Covers @portabletext/markdown (markdownToPortableText), @portabletext/block-tools (htmlToBlocks), custom deserializers, and the Portable Text specification for manual block construction.

What this can do

Capabilities declared in this component's own frontmatter — not inferred.

Inherit all session tools

Declares no tool restrictions — inherits every session tool

~123 tokens of context used while enabled, before you invoke anything

Documentation

README · ~1 min read

Portable Text Conversion

Convert external content (HTML, Markdown) into Portable Text for Sanity. Three main approaches:

  1. markdownToPortableText — Convert Markdown directly using @portabletext/markdown (recommended for Markdown)
  2. htmlToBlocks — Parse HTML into PT blocks using @portabletext/block-tools (for HTML migration)
  3. Manual construction — Build PT blocks directly from any source (APIs, databases, etc.)

Portable Text Specification

Understand the target format before converting. PT is an array of blocks:

[
  {

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