v2.6.0

Added

• Knowledge initialization: Add knowledge init to upload a sample, create a knowledge base and retrieval service, and verify retrieval, with recovery and resource reuse.
• Directory sync and file import: Add knowledge doc sync and knowledge doc import for local directories and existing files.
• Multimedia knowledge bases: Support audio/video knowledge bases, parser configuration, streaming uploads, image-only search, and online search filters.
• Agent capability discovery: Add --introspect and the bailian-knowledge skill, with corresponding capabilities in Knowledge Studio CLI.

Changed

• Chat output: Separate answers, phases, tools, sources, and usage in structured output; quiet mode emits only the final answer.
• Knowledge-base creation: Add billing notices, resource records, and cleanup guidance.

Fixed

• Reject blank required inputs in knowledge commands.
• Report completed, unconfirmed, and unexecuted batches when chunk deletion fails.