gleam-knowledge-patch
Gleam Knowledge Patch
Covers Gleam 1.7–1.15 (2025-01-05 through 2026-03-16). Claude Opus 4.6 knows Gleam through v1.6.x including core language (types, pattern matching, pipes, use expressions, Result/Option, labelled arguments, generics, opaque types, externals/FFI), BEAM and JavaScript targets, and gleam build tool basics.
Index
| Topic | Reference | Key features |
|---|---|---|
| Debug & testing | references/debug-and-testing.md | echo keyword, echo labels, assert for tests, let assert messages |
| Bit arrays | references/bit-arrays.md | JS parity (unaligned, 16-bit float, unit, UTF-16/32), float shorthand, size expressions |
| JavaScript FFI | references/javascript-ffi.md | $-prefixed external API, BitArray FFI, @external on types, CommonJS |
| Type system & patterns | references/type-system.md | Record updates across type params, const record updates, string <> in guards |
| Build tool & project | references/build-tool.md | Git deps, gleam dev, dev/ dir, gleam deps outdated, formatter controls |
Quick Reference — New Keywords & Syntax
| Feature | Version | Syntax |
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