Nightly 2026-11-04

Automated nightly build from the nightly branch.

Commit: 880637a
Date: 2026-11-04

Install

curl --proto '=https' --tlsv1.2 -sSf https://kestrel-lang.com/install.sh | sh

Or download the toolchain tarball for your platform below.

Kestrel v0.17.0

What's Changed

• feat: Exitable @main return types + conformance specialization (#110) by @jkpdino in #118
• fix: exhaustive tuple-literal match OSSA ICE + Bool discriminant width (#121) by @jkpdino in #122
• ci: install LLVM 18 so the codegen-llvm backend builds on the runners by @jkpdino in #123
• References stage 1: returnable refs (-> &T / &mutating T), escape checker, ret_borrow ABI by @jkpdino in #128
• Query-system refactor: Arc'd body queries, name-indexed members, copy-semantics kernel by @jkpdino in #131
• References (#115): second-class &T, ref conformances, and Indirection by @jkpdino in #217
• Bug-hunt fixes (#139–#216) → nightly by @jkpdino in #221
• feature: bin/lib by @jkpdino in #222
• Copy lifetime passes: stop implicit copies keeping COW storage shared by @jkpdino in #227
• Bidirectional type checker (P0–P5) + memory-safety fixes by @jkpdino in #231
• Make nightly CI green: fmt, clippy, unit tests, cast intrinsics by @jkpdino in #233
• Promote 0.17 to beta by @jkpdino in #235
• Release 0.17 by @jkpdino in #236

Full Changelog: v0.16.0...v0.17.0

Beta 2026-10-28

Automated beta build from the beta branch — the current release-train stabilization candidate.

Commit: 04c7735
Date: 2026-10-28

Install

Install jessup (https://kestrel-lang.com), then switch to this channel:

jessup install beta

Or download the toolchain tarball for your platform below.

Kestrel v0.16.0

What's Changed

• Release v0.14.0: Phase 14 - Syntactic Sugar & Standard Library by @jkpdino in #16
• Release/0.15 by @jkpdino in #103
• MIR refactor (MIR-3 / OSSA rewrite) by @jkpdino in #114

Full Changelog: v0.16.0-beta-1...v0.16.0

Kestrel v0.16.0-beta-1

What's Changed

• Feature/enums by @jkpdino in #1
• Feature/execution graph by @jkpdino in #2
• version: 0.10.0 by @jkpdino in #3
• Feature/memory model by @jkpdino in #4
• Feature/codegen by @jkpdino in #5
• version 0.13 by @jkpdino in #6
• Try Operator by @jkpdino in #8
• issue: add description for #9 by @jkpdino in #10
• chore: cargo fmt by @jkpdino in #11
• Feature/12 for loops by @jkpdino in #13
• Feature/14 compound assignment operators by @jkpdino in #15
• Feature/incremental hecs by @jkpdino in #17
• feature: boolean guard statements (issue #25) by @jkpdino in #93
• Allow keywords as parameter labels by @jkpdino in #94
• Partial range expressions (x.., ..<x, ..=x) by @jkpdino in #95
• Feature/0028 optional throwing constructors by @jkpdino in #96
• Chore/deinit rewrite by @jkpdino in #97
• feature: perf fixes by @jkpdino in #98
• Feature: null and some pattern sugar for Optional[T] by @jkpdino in #100
• Feature: Self constructors in concrete and protocol contexts by @jkpdino in #101
• Allow computed properties in protocol extensions by @jkpdino in #102
• Opaque types (some Protocol) — Categories 1 & 2 by @jkpdino in #104
• Nightly by @jkpdino in #105

Full Changelog: https://github.com/kestrellang/kestrel/commits/v0.16.0-beta-1