makecindy
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cindy
Cindy is an open-source AI agent that runs locally on your machine, integrates multiple AI harnesses and models, and provides memory, skills, and automation to perform real work in your projects and apps.
Why it is worth attention
It brings CoreAnimation-like additive state machines and analytical spring dynamics to any UI framework (e.g., Raylib, LVGL, Pygame) with zero runtime allocations and exact closed-form solutions.
Who it is for
- Desktop GUI framework developers
- Mobile app developers
- Embedded systems engineers
- Game engine UI programmers
Use cases
- Fluid, interruptible UI transitions (open/close menus, buttons)
- Scrollable lists with rubber-banding and momentum handoff
- Kinematic property coupling (scroll drives scale, blur, etc.)
- 3D transform animations (CATransform3D compatible)
Strengths
- Zero-allocation design uses a user-provided memory arena
- Analytical spring kernel avoids numerical drift and time-step instability
- Additive state machine enables seamless mid-flight retargeting with velocity preservation
- Provides Python bindings for rapid prototyping alongside C/C++
Considerations
- Requires manual memory management via a pre-allocated arena
- Only models spring and decay dynamics; no rigid body or collision physics
- Niche library with limited community adoption and documentation still maturing
README quick start
Quick start
Description
A tiny physics-aware animation engine for remarkably fluid GUIs. Written in single-header C
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