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Valibot

The modular and type safe schema library for validating structural data.

For agents: Modular, type-safe schema library for validating structured data in TypeScript/JavaScript, with guides on installation, schemas, pipelines and type inference.

schema-validationtypescripttype-safetyjavascript-librarydata-validation

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-21T08:33:54.131Z. Cached copy · Source on valibot.dev

# Valibot

> The modular and type safe schema library for validating structural data.

Every link below points to the Markdown version of a documentation page. The same page is served as HTML at the same URL without the `.md` extension. The whole documentation is also available as a single file at [llms-full.txt](https://valibot.dev/llms-full.txt), the guides at [llms-guides.txt](https://valibot.dev/llms-guides.txt), the API reference at [llms-api.txt](https://valibot.dev/llms-api.txt) and the blog posts at [llms-blog.txt](https://valibot.dev/llms-blog.txt). An MCP server with tools to search and read this documentation is available at https://valibot.dev/mcp (see [server card](https://valibot.dev/.well-known/mcp/server-card.json) and [coding agents guide](https://valibot.dev/guides/coding-agents.md)).

## Guides

### Get started

- [Introduction](https://valibot.dev/guides/introduction.md)
- [Installation](https://valibot.dev/guides/installation.md)
- [Coding agents](https://valibot.dev/guides/coding-agents.md)
- [Quick start](https://valibot.dev/guides/quick-start.md)
- [Use cases](https://valibot.dev/guides/use-cases.md)
- [Comparison](https://valibot.dev/guides/comparison.md)
- [Ecosystem](https://valibot.dev/guides/ecosystem.md)

### Main concepts

- [Mental model](https://valibot.dev/guides/mental-model.md)
- [Schemas](https://valibot.dev/guides/schemas.md)
- [Pipelines](https://valibot.dev/guides/pipelines.md)
- [Parse data](https://valibot.dev/guides/parse-data.md)
- [Infer types](https://valibot.dev/guides/infer-types.md)
- [Methods](https://valibot.dev/guides/methods.md)
- [Issues](https://valibot.dev/guides/issues.md)

### Schemas

- [Objects](https://valibot.dev/guides/objects.md)
- [Arrays](https://valibot.dev/guides/arrays.md)
- [Optionals](https://valibot.dev/guides/optionals.md)
- [Enums](https://valibot.dev/guides/enums.md)
- [Unions](https://valibot.dev/guides/unions.md)
- [Intersects](https://valibot.dev/guides/intersections.md)
- [Other](https://valibot.dev/guides/other.md)

### Advanced

- [Naming](https://valibot.dev/guides/naming-convention.md)
- [Async](https://valibot.dev/guides/async-validation.md)
- [i18n](https://valibot.dev/guides/internationalization.md)
- [JSON Schema](https://valibot.dev/guides/json-schema.md)
- [Internals](https://valibot.dev/guides/internal-architecture.md)
- [Integration](https://valibot.dev/guides/integrate-valibot.md)
- [Extension](https://valibot.dev/guides/extend-valibot.md)

### Migration

- [To v0.31.0](https://valibot.dev/guides/migrate-to-v0.31.0.md)
- [From Zod](https://valibot.dev/guides/migrate-from-zod.md)
- [From TypeBox](https://valibot.dev/guides/migrate-from-typebox.md)
- [From Joi](https://valibot.dev/guides/migrate-from-joi.md)
- [From Yup](https://valibot.dev/guides/migrate-from-yup.md)
- [From class-validator](https://valibot.dev/guides/migrate-from-class-validator.md)
- [From Superstruct](https://valibot.dev/guides/migrate-from-superstruct.md)
- [From io-ts](https://valibot.
…

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Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.

Claim my listing on Agent Web Map for valibot.dev:
1. POST https://agentwebmap.com/v1/sites/valibot.dev/claims and keep claim_id and claim_secret private.
2. Publish the proof: add the line "AgentWebMap ownership: <token>" (token from step 1) to https://valibot.dev/llms.txt, or use the DNS, meta-tag or well-known method the response describes.
3. POST https://agentwebmap.com/v1/sites/valibot.dev/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/valibot.dev).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

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