v1.9.0

Added

• 3 new skills (45 → 48):
  • gdextension — native extensions with godot-cpp (C++) and gdext (Rust): when to go native, project/build setup, ClassDB class binding, the .gdextension file, compatibility rules, and GDScript/C# interop. References: rust-gdext, debugging-native.
  • multithreading — WorkerThreadPool, Thread/Mutex/Semaphore, call_deferred thread-safety, and threaded resource loading, with C# System.Threading/Task parity. Reference: pitfalls.
  • mobile-development — Android/iOS export & signing, app lifecycle, permissions, JavaClassWrapper/AndroidRuntime (Godot 4.4+), device features & safe area, mobile renderer/perf, and C#-on-mobile caveats. References: plugins, iap-and-ads, crash-debugging.
• New Native & Performance README category; gdscript-advanced added to the README catalog (was missing).

Changed

• Wired the 3 new skills into the cross-reference graph (export-pipeline, godot-optimization, assets-pipeline, csharp-godot, responsive-ui, input-handling) and referenced them from the godot-performance-profiler, godot-csharp-engineer, and godot-tools-engineer agents.

Fixed

• Corrected the v1.8.0 release notes: actual validator baseline was 0 errors, 10 warnings (0 token-budget), not 15/5; "down from 17 in v1.7.3" (not 22). Same correction applied to the C# parity-debt note (which now also names gdscript-advanced as accepted GDScript-only).

Release notes: All three new skills are grounded in the official Godot docs (signatures, macros, and .gdextension file format verified against a local godot-docs clone; see docs/superpowers/notes/2026-05-29-*-research.md). Validator baseline at release: 0 errors, 10 warnings (all csharp-parity-accepted intentional GDScript-only; 0 token-budget). 48 skills, every SKILL.md ≤ 16 KB. Repo-wide minimum stays at Godot 4.3+ (features requiring newer engines — e.g. JavaClassWrapper at 4.4+, C# Android export at .NET 9 — are labeled inline).