v0.3.0 - Flows & Foundations

Released: February 7, 2026

Highlights

This release delivers the Bevy 0.17 framework migration, a complete E-network environmental flow system, draggable flow endpoint handles, and major persistence hardening. Together these form a more reliable foundation for the features ahead.

Features

E-Network Environmental Flows

• Feedback flows (Sink→Source) - Dashed arcs curving upward represent environmental feedback loops

• Feed-forward flows (Source→Sink) - Curves downward for environmental inputs

• Full save/load/drag support for all E-network flow types

Draggable Flow Endpoint Handles

• Drag handles on internal flows to adjust connection points on subsystem boundaries

• Angle-based offsets that stay correct at any zoom level

• Auto-offset for stacking multiple flows on the same boundary

• Persistent across save/load

Interface Subsystem Keyboard Shortcut

• Quick creation of interface subsystems via keyboard

Technical

Bevy 0.15 → 0.17.3 Migration

• Full codebase migration: Leptos 0.7→0.8, lyon 0.13→0.15

• Updated leptos-bevy-canvas, bevy-inspector-egui, bevy_prototype_lyon

• WASM builds configured with getrandom wasm_js backend

Persistence Hardening

• Pre-scan OriginalIds to prevent entity ID collisions

• Preserve entity IDs across save/load (eliminates position drift)

• Prevent duplicate interfaces and flows on reload

• Despawn orphaned flow endpoint handles on model reload

Selection & Rendering Fixes

• Z-order respected for overlapping entities

• Subsystem click focus switching works correctly

• Consistent G-network flow thickness

Value

Establishes a reliable, up-to-date foundation. The Bevy 0.17 migration unblocks future ecosystem crate adoption (widget library, advanced rendering). Persistence hardening means models survive save/load without drift or duplication — critical for research use.