portable-text-serialization SKILL.md skillA
portable-text-serialization from sanity-io/agent-toolkit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sanity-io/agent-toolkit/portable-text-serialization@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sanity-io/agent-toolkit
- Path
skills/portable-text-serialization/SKILL.md- Versions recorded
- 2
- Latest version
- v1.0.0, committed Feb 12, 2026
- First version recorded
- Feb 11, 2026
- Size
- 4,402 bytes
- Repository stars
- 197
- License
- MIT
Render and serialize Portable Text to React, Svelte, Vue, Astro, HTML, Markdown, and plain text. Use when implementing Portable Text rendering in any frontend framework, building custom serializers for non-standard block types, converting Portable Text to HTML strings server-side, converting Portable Text to Markdown, extracting plain text from Portable Text, or troubleshooting rendering issues with marks, blocks, lists, or custom types.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Portable Text Serialization
Render Portable Text content across frameworks using the `@portabletext/*` library family. Each library follows the same component-mapping pattern: you provide a `components` object that maps PT node types to framework-specific renderers.
## Portable Text Structure (Quick Reference)
PT is an array of blocks. Each block has `_type`, optional `style`, `children` (spans), `markDefs`, `listItem`, and `level`.
```
Root array
├── block (_type: "block")
│ ├── style: "normal" | "h1" | "h2" | "blockquote" | ...
│ ├── children: [span, span, ...]
│ │ └── span: { _type: "span", text: "...", marks: ["strong", "<markDefKey>"] }
│ ├── markDefs: [{ _key, _type: "link", href: "..." }, ...]
│ ├── listItem: "bullet" | "number" (optional)
│ └── level: 1, 2, 3... (optional, for nested lists)
├── custom block (_type: "image" | "code" | any custom type)
└── ...more blocks
```
**Marks** come in two forms:
- **Decorators**: string values in `marks[]` like `"strong"`, `"em"`, `"underline"`, `"code"`
- **Annotations**: keys in `marks[]` referencing entries in `markDefs[]` (e.g., links, internal references)
## Component Mapping Pattern (All Frameworks)
…Read the whole file at its exact version.
How to install
mdr add sanity-io/agent-toolkit/portable-text-serialization@sha256:082c107c6e82a102The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_2d6zcpvpnqziayvt)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Feb 11, 2026 and Feb 12, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.0 latest | 2026-02-12 | a11c399 | 4,402 B | A | view · diff |
| v1.0.0 | 2026-02-11 | 6a5156b | 3,612 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4402 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
sanity-io/agent-toolkit · 197 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2d6zcpvpnqziayvt GET https://markdownregistry.com/api/v1/resolve?ref=sanity-io/agent-toolkit/portable-text-serialization GET https://markdownregistry.com/api/v1/blob/082c107c6e82a10222e34ab1a511db611de108e4608ee123a60166074c800f72
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.