- Shell decision changed from Electron + Code-OSS to Tauri (Rust) + Monaco Editor
- Fast startup (~0.3-0.8s), low memory (100-200MB) via system webview
- Rust backend for tool bus, knowledge graph parser, permission engine, runtime manager
- Rationale documented vs Electron and Zed
- Model changed from Claude to Grok (xAI), BYO API key
- IMPLEMENTATION.md rewritten for Rust/Tauri stack: crates layout, Rust TDD tests, cargo-based CI
- Phase 1 roadmap, test strategy, decisions section updated to match