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

Side B fixes real correctness bugs in the DSL/linkify layer (non-deterministic block tokens, URL over-matching into trailing punctuation, missing external/dash-ref linkification, ambiguous unbraced code-fence item bodies) and backs each with focused unit tests, yielding durable parser/rendering correctness. Side A adds a substantial new feature (Reddit OAuth linking) with reasonable design, but it's larger, more speculative in scope, and mixes in refactors/renames without the same density of targeted bug fixes and regression tests.