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

Side B is a genuine architectural cleanup: it separates identity/canonicalization concerns into dedicated modules, fixes a real inconsistency (identity rewriting scattered across reducer/events), removes dead double-@ sigil confusion, and makes the delegate optional with proper validation, backed by updated tests across CLI, server, and integration suites. Side A is mostly infrastructure/deploy scaffolding (Dockerfile, fly.toml, CI) plus a large CSS/JS dashboard UI bolted onto one file, which is useful operationally but adds more incidental complexity and less durable architectural value than B's identity refactor.