Logs all four step-2 follow-up commits (c917f92,2e0b97a,d30d566,159f898+ their lock-ins). Pack-fns are functionally complete on the mono path. Test count: 203/203. Step 6 (stdlib print/format refactor) is now unblocked from the type-system side; step 5 (generic Into(Block) impl) still needs step 3 (type-position $args[$i]) before its trampoline body can be parametric. iOS-sim chess regression-verified post-step-2b. Outstanding (not blocking step 3): issue-0046, non-literal comptime arg mangling.