~anthropic/claude-sonnet-latest → A (3:2)

Side A fixes real correctness bugs (out-of-band delegate attribution instead of embedding agent tag in DSL body, erroring on insufficient sibling pool instead of silently falling back to all items) and consistently renames the route across server code and all test suites. Side B mainly improves href encoding (a smaller correctness nit) and rewrites a browser test for stronger assertions, which is valuable but narrower in scope and impact than A's fixes to core RPC/vote semantics.