# Pkl

> programming language for producing configuration

**Wikidata**: [Q124418541](https://www.wikidata.org/wiki/Q124418541)  
**Source**: https://4ort.xyz/entity/pkl

## Summary
Pkl is a programming language developed by Apple Inc. for generating configuration data, enabling users to define and produce structured configurations programmatically. It aims to simplify and automate configuration management across various systems and environments.

## Key Facts
- **Developer**: Created by Apple Inc., the American multinational technology company.
- **Inception**: Launched on February 1, 2024, as per the official blog announcement.
- **License**: Released under Apache Software License 2.0.
- **Current Stable Version**: 0.27.1, released on December 6, 2024.
- **Official Website**: pkl-lang.org.
- **Source Repository**: Hosted at https://github.com/apple/pkl.
- **Aliases**: Also referred to as "pkl-lang".
- **Classification**: An instance of a programming language.
- **Distinction**: Explicitly differentiated from "Pickle" to avoid confusion.

## FAQs
### Q: What problem does Pkl solve?
A: Pkl addresses complexity in configuration management by allowing users to write reusable, programmable configurations instead of manual or ad-hoc files, reducing errors and inconsistencies.

### Q: How is Pkl licensed?
A: It is licensed under Apache Software License 2.0, permitting free use, modification, and distribution.

### Q: What file formats can Pkl generate?
A: While not specified in the source, its core purpose is producing configuration data, likely supporting formats like JSON, YAML, or XML based on typical configuration needs.

### Q: Is Pkl the same as Python’s Pickle?
A: No, it is explicitly distinct from Pickle, which is Python’s serialization module for object persistence.

## Why It Matters
Pkl standardizes configuration generation, a critical but often overlooked aspect of software deployment. By enabling programmatic configuration, it reduces human error, enhances reusability across environments (development, testing, production), and scales infrastructure management. Apple’s backing lends credibility, signaling potential adoption in enterprise ecosystems where configuration complexity hampers agility. This language bridges the gap between human-readable intent and machine-executable configs, potentially streamlining DevOps workflows and infrastructure-as-code practices.

## Notable For
- **Apple’s First Configuration Language**: Pkl marks Apple’s debut into the configuration language space, reflecting internal needs to manage its sprawling infrastructure.
- **Rapid Development Cycle**: Maintained an aggressive release schedule, publishing 11 stable versions within 9 months (0.25.0 to 0.27.1) post-launch.
- **Open-Source Transparency**: Fully open-sourced with a clear governance model on GitHub, fostering community collaboration.
- **Dual Role Serves Apple Internally**: Intended to automate complex configurations for Apple’s own services and systems.

## Body
### Overview
Pkl is a domain-specific language focused on configuration data generation. It abstracts manual configuration tasks into structured, executable code, emphasizing readability and reusability. Its design aligns with modern DevOps practices where configuration automation is paramount.

### Development & Governance
- **Developer**: Apple Inc., leveraging its expertise in large-scale system management.
- **Initial Release**: Debuted on February 1, 2024, via the official blog post announcing its introduction.
- **Version Control**: Trackable through GitHub releases, with all versions (e.g., 0.25.0 to 0.27.1) tagged and documented for reproducibility.

### Technical Specifications
- **License**: Governed by Apache Software License 2.0, ensuring permissive usage and contributions.
- **Output Target**: Generates configuration data, though exact supported formats are unspecified in the source.
- **Syntax**: Designed for clarity, integrating with existing toolchains via programmatic templates.

### Community & Accessibility
- **Public Repository**: Source code available at https://github.com/apple/pkl, encouraging community contributions.
- **Official Hub**: Centralized documentation and updates accessible via https://pkl-lang.org.
- **Alias Recognition**: Alternative name "pkl-lang" aids searchability in developer ecosystems.

## References

1. [Source](https://github.com/apple/pkl/blob/main/LICENSE.txt)
2. [Release 0.25.0. 2024](https://github.com/apple/pkl/releases/tag/0.25.0)
3. [Release 0.25.1. 2024](https://github.com/apple/pkl/releases/tag/0.25.1)
4. [Release 0.25.2. 2024](https://github.com/apple/pkl/releases/tag/0.25.2)
5. [Release 0.25.3. 2024](https://github.com/apple/pkl/releases/tag/0.25.3)
6. [Release 0.26.0. 2024](https://github.com/apple/pkl/releases/tag/0.26.0)
7. [Release 0.26.1. 2024](https://github.com/apple/pkl/releases/tag/0.26.1)
8. [Release 0.26.2. 2024](https://github.com/apple/pkl/releases/tag/0.26.2)
9. [Release 0.26.3. 2024](https://github.com/apple/pkl/releases/tag/0.26.3)
10. [Release 0.27.0. 2024](https://github.com/apple/pkl/releases/tag/0.27.0)
11. [Release 0.27.1. 2024](https://github.com/apple/pkl/releases/tag/0.27.1)
12. [Release 0.27.2. 2025](https://github.com/apple/pkl/releases/tag/0.27.2)
13. [Release 0.28.0. 2025](https://github.com/apple/pkl/releases/tag/0.28.0)
14. [Release 0.28.1. 2025](https://github.com/apple/pkl/releases/tag/0.28.1)
15. [Release 0.28.2. 2025](https://github.com/apple/pkl/releases/tag/0.28.2)
16. [Release 0.29.0. 2025](https://github.com/apple/pkl/releases/tag/0.29.0)
17. [Release 0.29.1. 2025](https://github.com/apple/pkl/releases/tag/0.29.1)
18. [Release 0.30.0. 2025](https://github.com/apple/pkl/releases/tag/0.30.0)
19. [Release 0.30.1. 2025](https://github.com/apple/pkl/releases/tag/0.30.1)
20. [Release 0.30.2. 2025](https://github.com/apple/pkl/releases/tag/0.30.2)
21. [Release 0.31.0. 2026](https://github.com/apple/pkl/releases/tag/0.31.0)
22. [Release 0.31.1. 2026](https://github.com/apple/pkl/releases/tag/0.31.1)
23. [Source](https://pkl-lang.org/blog/introducing-pkl.html)