lightcraft

### Overview LightCraft is an open-source, clean-room reimplementation of Adobe Lightroom built from scratch in pure Rust. It provides native photo library organization and non-destructive RAW photo development across macOS, Windows, Linux, and the web via WebAssembly (WASM). Notably, it embeds a native Model Context Protocol (MCP) server, allowing autonomous AI agents to drive the editing pipeline programmatically. The project is dual-licensed under MIT and Apache-2.0 and is actively under early-stage development. --- ### Core Architecture & Capabilities By implementing the raw development engine in pure Rust rather than relying on legacy C++ wrappers or JavaScript frameworks, LightCraft minimizes memory overhead while delivering native concurrency for pixel-level operations. The core architecture centers around three main pillars: 1. Cross-Platform Native & Web Compilation: LightCraft compiles directly to native binaries for macOS, Windows, and Linux. The exact same Rust codebase compiles down to WebAssembly to run pixel-manipulation logic directly in browser environments. 2. MCP-Driven Automation: Instead of restricting adjustments to manual mouse inputs, LightCraft integrates an MCP server interface. This allows AI agents to inspect image metadata, modify develop parameters, and execute editing pipelines over a standardized protocol. 3. Non-Destructive Development Pipeline: The edit state preserves original pixel data, applying adjustments dynamically through a structured sequence of panels and tools. --- ### Feature Breakdown According to the project specs, LightCraft exposes the key features required for professional photography workflows: * Library & Asset Management: Organization and cataloging tools for handling large photo libraries directly on your local machine. * Light & Effects Panels: Standard exposure, tonality, contrast, and local light adjustment controls. * Color Grading & Color Mixer: Deep target-color manipulation, supporting custom presets, profiles, and cinematic color adjustments. * Spatial & Targeted Masking: Precision selection tools that target specific areas of an image for localized edits. * Before / After Split Views: Instant visual diffing between original captures and adjusted states within the loupe view. --- ### Developer Evaluation Transitioning a RAW processing editor away from legacy monolithe platforms toward a clean-room Rust architecture offers huge performance advantages: * Zero-Cost Abstractions & Thread Safety: Processing high-megapixel RAW files requires raw CPU/GPU performance. Rust's memory model eliminates runtime garbage collection pauses while safely parallelizing pixel transformations across multi-core systems. * Native Agentic Control: The built-in MCP server makes LightCraft uniquely extensible. Headless workflows, automated batch adjustments via LLM agents, and remote editing scripts can interface directly with the application engine without custom UI scripting wrappers. While the project is young and moving fast, its combination of pure Rust performance, WASM portability, and agentic control makes it a compelling open-source alternative to proprietary RAW editors.