- Normalise BRITISH_REPLACEMENTS: remove baked-in \b from entries so all entries are plain base words; the function adds boundaries uniformly - Replace O(n*m) while-loop double-space removal with single-pass collapse - Add debug_assert! documenting ASCII assumption for byte-indexed suffix slicing - Expand llm_client.rs module-level doc comment - Run cargo fmt on ai-formatting crate Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>