- Added `/tan` slash command registration and interactive handling.
- Added TanCommandController validation and async task scheduling for `/tan` dispatch.
- Added session cloning that suppresses breadcrumbs, copies artifacts, and handles abort cleanup.
- Added `promptCacheKey` support in Agent and inherited `providerPromptCacheKey` in session creation.
- Fixed edit/read/search/ast-edit/ast-grep outputs to resolve OSC8 links from session cwd.
- Fixed grouped-file output classification to honor headerBase and fileScope for parent path resolution.
- Fixed read and write renderers to use resolved source/resolved paths as hyperlink targets.