carbon-language/carbon-lang v0.0.0-0.nightly.2026.01.15

Nightly build 2026.01.15

on GitHub

What's Changed

Toolchain and implementation changes 🛠️

• Prune deps to reduce compiles by ~30% by @chandlerc in #6598
• [parse] Implement initial parsing support for Lambda expressions by @burakemir in #6583
• Make identifying a facet type an operation on a (self+facet type) pair by @danakj in #6592
• Consolidate debugging documentation. by @geoffromer in #6596
• Use lines instead of statements for readability-function-size clang-tidy by @geoffromer in #6594
• Misc. improvements to raw/debug SemIR output by @geoffromer in #6557
• Form-aware textual format for return parameters and arguments by @geoffromer in #6588
• Update LLVM to a recent commit by @chandlerc in #6599
• Use the name of the self and facet type as the inst name for a require decl scope by @danakj in #6602

Documentation changes 📝

• Add advent of code 2024 day 14 and day 15 part 1 solutions by @zygoloid in #6597

Infrastructure changes 🏗️

• Start refactoring toolchain config into separate files by @chandlerc in #6587
• Remove workaround for Clang versions <= 18 by @chandlerc in #6600

Full Changelog: v0.0.0-0.nightly.2026.01.14...v0.0.0-0.nightly.2026.01.15