// blog2026-05-27

Return Echo Development #1

It's been a week of some solid behind-the-scenes work on Return Echo. Nothing flashy on the surface this time, but I spent a lot of time cleaning up old code, restructuring parts of the architecture, and making the AI review reports more reliable and useful. These kinds of improvements don't always feel glamorous, but they help keep the project healthy and reduce weird bugs down the line.

What I fixed and improved

A big focus this week was tidying up the AI review workflow and snapshot handling systems. I removed some old reports that were cluttering the project, and generated fresh AI review reports that are more up to date. To make the system more maintainable, I moved a few classes around into better package locations, which helps clarify the code structure.

I also worked on the player UI request queue and renamed some classes like `GuiLayerContext` to make their roles more obvious. In the simulation module, I pushed further on refactoring ship state management-shifting it away from ECS into a snapshot store with a request queue and execution system. This reduces direct ECS dependence and makes state handling cleaner and easier to reason about.

There was also a round of cleanup: I deleted unused event classes and constructors, and removed unused references across the codebase. This is one of those chores that really helps keep the code less confusing over time.

On the rendering and simulation side, I fixed issues with ship sensors so all relevant entities show on radar again, corrected the docking proximity service to get docking working smoothly, and improved visual elements like dust textures and engine trails. The camera system gained improved panning controls, which should feel more natural during gameplay.

What I learned

This week reinforced how important the boundary between ECS and simulation code is. Some static scans flagged potential ECS/simulation boundary leaks, where simulation code is still referencing ECS concepts, like entity IDs. That's a sign I need to push harder on fully separating those layers-using stable identifiers like ObjectId or registries instead of ECS entities shared directly in simulation components.

I also realized the global event bus usage, while powerful, carries risks for unclear event flow and debugging challenges. I'm thinking about ways to better classify event handling roles-distinguishing listeners, queues, or mailboxes more explicitly-to avoid surprises in the event-driven logic.

Lastly, working on the snapshot stores and request queues reminded me how valuable it is to decouple state tracking from ECS. It simplifies mutation phases and makes things less error-prone, especially with complex operations like ship state updates or docking.

What I got wrong

Looking back, I probably let some architectural debt pile up too long around the ECS boundaries. The simulation module still has references to ECS in ways that aren't ideal, leading to confusing coupling. I underestimated how long the refactor to a clean snapshot store and request queue system would take, and the move isn't yet fully complete.

Also, the AI review reports generation and management process got a bit messy as I shifted classes and cleaned old reports. I could have planned that migration more smoothly instead of doing it piecemeal, which caused a little churn in the codebase.

Why it matters for Return Echo

These improvements and lessons directly help make Return Echo more maintainable and scalable. Cleaning up the AI review tooling means I'll be able to catch code and design issues earlier across the project. The ship state refactor lays groundwork for easier future features-like more complex AI behaviors or multi-ship interactions-by having a clearer, less fragile state management system.

Fixing docking and radar issues impacts the player's immediate experience, making the core gameplay smoother and more intuitive. And improving camera controls helps with immersion and ease of navigation. All these pieces together keep progressing Return Echo towards a polished, cohesive space sim.

Where I'm heading next

Next week, I want to finish tightening the ECS/simulation separation by replacing remaining ECS references in simulation modules with stable identity systems. I'll also continue refining the snapshot stores and the player UI request queue to handle more complex interactions cleanly.

On the AI side, I'm planning to improve the AI review reports even further-maybe adding more actionable summaries and better tracking of code metrics. I also want to take another look at the global event bus usage and experiment with clearer classifications to reduce event flow complexity.

Finally, a few minor fixes and polish on ship systems and UI responsiveness should round out the iteration nicely. It's all shaping up to make Return Echo feel tighter and more fun under the hood.