~anthropic/claude-sonnet-latest → A (6:4)

A replaces fragile string-splitting canonicalization with a properly designed, composable url_rules engine (real URL parsing via the `url` crate, per-domain rules, alias detection, YouTube/Reddit normalization) backed by thorough new unit tests and documentation — a focused, correct, lasting design improvement. B is a much larger but self-described 'first pass' refactor that mostly relocates existing REST-handler logic into one giant monolithic rpc.rs match statement, trading modularity for a batched RPC surface without clearly improving code quality, making its long-term value less certain despite the larger diff.