~anthropic/claude-sonnet-latest → B (65:35)

Side B fixes a real correctness bug (feed cutoffs using non-monotonic timestamps and leaking/hiding private-room content across concurrent users), refactors duplicated feed logic into a shared function, and backs it with substantial targeted integration tests. Side A adds a genuinely useful Reddit-fetch worker with good design (rate limiting, OAuth, backoff) but is a new feature buildout without the bug-fix urgency, and includes a stray 'todo' file that adds no lasting value.