chadtmiller.com
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README.md
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README.md
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[](https://hex.pm/packages/honk)
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[](https://hexdocs.pm/honk/)
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An ATProto Lexicon validator for Gleam.
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## What is it?
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**honk** validates [AT Protocol](https://atproto.com/) lexicon schemas and data against those schemas. Lexicons are the schema language used by the AT Protocol to define record types, XRPC endpoints, and data structures.
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An [AT Protocol](https://atproto.com/) Lexicon validator for Gleam.
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## Installation
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## Features
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- ✅ **17 Type Validators**: string, integer, boolean, bytes, blob, cid-link, null, object, array, union, ref, record, query, procedure, subscription, token, unknown
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- ✅ **12 String Format Validators**: datetime (RFC3339), uri, at-uri, did, handle, at-identifier, nsid, cid, language, tid, record-key
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- ✅ **Type Validators**: string, integer, boolean, bytes, blob, cid-link, null, object, array, union, ref, record, query, procedure, subscription, token, unknown
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- ✅ **String Format Validators**: datetime (RFC3339), uri, at-uri, did, handle, at-identifier, nsid, cid, language, tid, record-key
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- ✅ **Constraint Validation**: length limits, ranges, enums, required fields
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- ✅ **Reference Resolution**: local (`#def`), global (`nsid#def`), and cross-lexicon references
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- ✅ **Circular Dependency Detection**: prevents infinite reference loops