runner: split modes (mir/vm/llvm/bench) and extract plugin init; interpreter: split objects into ops/methods/fields; VM logs gated; Phi selection minimal fix; CURRENT_TASK updated; remove legacy backups

src/backend/dispatch.rs

@@ -0,0 +1,26 @@
+/*!
+ * VM Dispatch table (scaffolding)
+ *
+ * Purpose: Centralize mapping from MIR instruction kinds to handler fns.
+ * Status: Initial skeleton; currently unused. Future: build static table for hot-path dispatch.
+ */
+
+use crate::mir::MirInstruction;
+use super::vm::{VMError};
+
+/// Placeholder for an instruction dispatch entry
+pub struct DispatchEntry;
+
+/// Placeholder dispatch table
+pub struct DispatchTable;
+
+impl DispatchTable {
+    pub fn new() -> Self { Self }
+
+    /// Example API for future use: resolve a handler for an instruction
+    pub fn resolve(&self, _instr: &MirInstruction) -> Option<DispatchEntry> { None }
+}
+
+/// Example execution of a dispatch entry
+pub fn execute_entry(_entry: &DispatchEntry) -> Result<(), VMError> { Ok(()) }
+