Add per-session parallel locking and simplify lock handling

Add multi-session support via reply threading

Simplify and fix efficiency issues in bot

Retry file downloads and improve error handler messages

Suppress TimedOut errors in handler wrapper

Catch all exceptions during typing task cleanup

Don't retry message sends on TimedOut to prevent duplicates

Disallow interactive tools that cannot work in --print mode

Tolerate startup failures and retry bots independently

Fix stream parsing to handle missing trailing newline

Register error handler with informative messages

Add network retry with backoff to message sending

Make typing indicator resilient to network errors

Fix skill discovery to handle directory-based skills

Add per-bot allowed_tools and verbose config options