Preserve mid-conversation system messages through provider conversion (#1125)

Introduce a typed application boundary for provider execution (#1045)

Move protocol models to their protocol owners (#1044)

Move runtime packages under src namespace (#1029)

fix: handle disallowed special tokens in tiktoken encoder (#382)

refactor: drop legacy title-generation detection copy

fix: detect Claude Code 2.1+ session title requests for optimization skip

refactor: remove OpenRouter rollback, shims, and redundant layers

Backup/before cleanup 20260222 230402 (#58)

new linter rules and fixes

Phase 7: Directory restructuring (messaging/ and tests/)