Writing Custom Nav2 Controller Plugins

Source: ros2-copilot-skills custom controller plugin skill

Why This Matters

Sometimes none of the standard controllers match the vehicle, environment, or control objective. A custom controller plugin is the right move when the local-control problem is genuinely different, not when existing controllers have simply not been tuned carefully yet.

Distilled Takeaways

• Write a custom controller only when there is a real motion or task gap in the available plugin set.
• The plugin model is designed to support this without rewriting the surrounding navigation stack.
• Controller interfaces should be explicit about path following, constraints, and failure semantics.
• Maintenance cost matters: a custom controller becomes part of your robotics platform.

Practical Guidance

• Exhaust controller selection and tuning before building a new one.
• Define the specific motion problem your plugin solves better than existing options.
• Test with real costmaps, replans, and cmd_vel consumers.
• Keep the controller API and parameter set intentionally small at first.

Corroborating References

• Nav2 plugin tutorials
• Nav2 controller plugins docs

When to Read the Original Source

Go to the original skill when you want the controller-plugin scaffolding and lifecycle of how a custom local controller integrates into Nav2.