Clarify cycle stepper reset inlining

AGENTS.md

@@ -57,9 +57,10 @@ Never ever run tests marked with trait Category = Slow. Always invoke `dotnet te
 
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-Always use indentation with four space characters in source code files, even if a file currently uses tabs. Increase indentation level by exactly one indentation unit (four spaces) per nested block. When parameters or long expressions wrap, indent the continuation with two indentation units for clarity.
+Always use indentation with four space characters in source code files, even if a file currently uses tabs or appears to rely on eight-space indentation. Increase indentation level by exactly one indentation unit (four spaces) per nested block. When parameters or long expressions wrap, indent the continuation with two indentation units for clarity.
+Explicitly prefer reusing existing variables once their previous values are no longer required instead of declaring new locals of the same type. Call out the variable reuse in comments when its meaning changes so the intent stays clear and register pressure remains minimal.
 
-Keep the divisor cycle cache limited to three blocks in memory (the base snapshot plus at most two additional blocks) and always start background computation of the next block immediately after loading the first block from disk and whenever work begins on the most recently generated block.
+Keep the divisor cycle cache limited to a single block in memory (only the on-disk snapshot). When a lookup misses, compute the required cycle on the configured device and discard the transient result instead of scheduling background generation or caching additional blocks.
 
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