blog: release-0.20

Author: Chemaclass

content/blog/2025-08-25-release-0.20.md

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+title = "Release: v0.20"
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+
+## Expanding the Core
+
+### ✨ TL;DR
+
+This release expands Phel’s core with many new functions and macros, unifies and improves collection handling (`reduce`, `take`, `map`, `sets`), and streamlines runtime access through the new Phel facade. It also includes key bug fixes, refined math behavior, and developer workflow enhancements.
+
+## Highlights
+
+### ✨ New features
+
+- Unified `reduce` implementation now works without an initial value (removing the need for `reduce2`)
+- Added a wide range of core functions such as `select-keys`, `median`, `slurp`, `spit`, `zipmap`, `repeat`, and more, along with aliases like `assoc/assoc-in` and `dissoc/dissoc-in`
+- Introduced macros `some->` and `some->>` for optional chaining patterns
+- `take` now supports PHP Traversable inputs for safe slicing of generators and other iterables
+- Phel serves as the public entry class and proxy for `Registry` methods, exposing additional constructors and helpers
+
+### 🐛 Bug fixes
+
+- Resolved `map` exhaustion on empty collections
+- Fixed `contains-value?` handling of nil values
+- Corrected set `difference` behavior for certain inputs
+- Addressed `require` loading when `*build-mode*` is unset
+- Prevented coercion of `nil` to 0 in math operations
+
+### 🔧 Enhancements & Refactors
+
+- Improved `php/->` to support nested calls
+- Adopted new `list`, `vector`, `set`, and `map` constructors for cleaner proxying through Phel
+
+### ⚙️ Miscellaneous
+
+- Added an auto-assign-author GitHub workflow to streamline contributions
+
+## Full list
+
+For a full list of changes, have a look at the concrete version:
+
+- [v0.20.0](https://github.com/phel-lang/phel-lang/releases/tag/v0.20.0)