docs: update instructions to enforce usage of auto-spawning headless neovim instance

nvim-core/src/instructions.md

@@ -28,4 +28,4 @@ If you need to access *any* Neovim API that does not have a dedicated tool (e.g.
 4. **Buffer Focus:** When making changes to a specific buffer, always ensure the active window is switched to that buffer, and optionally move the cursor so the human can see the change visually.
 
 ## 3. The "Unix is NOT King" Rule
-When Neovim is running and you need to perform file read/writes or search and replace within an opened project, **prioritize Neovim tools over basic unix terminal utilities** (like `cat`, `grep`, `sed`, `awk`, or PowerShell equivalents). Use Neovim as your primary interface to the codebase.
+You should **ALWAYS prioritize Neovim tools over basic unix terminal utilities** (like `cat`, `grep`, `sed`, `awk`, or PowerShell equivalents) for file read/writes and search/replace. If an interactive Neovim session is not currently open, the server will automatically spawn a persistent headless Neovim daemon in the background to execute your commands. Use Neovim as your primary AST-aware interface to the codebase at all times.