Source: https://code.claude.com/docs/en/changelog (v2.1.319, Nov 6 2026). Relevant to yoyo: (1) permissions.denyInsteadOfPrompting: a tool call that would wait on a permission prompt is DENIED and the turn continues (terminal sessions, subagents, teammates) -- a third option between yoyo -p auto-approve-all (#1149 decision A) and blocking. (2) An exact ask rule is refused, not asked, when a broader deny rule covers the command (deny precedence over narrower ask). (3) MCP tasks: when an MCP server runs a tool call as a task, Claude Code backgrounds it and reports the result when it finishes; env var to opt out. yoyo has stdio MCP only, no task support. (4) remote-control used to exit silently with status 0 when a first-run question got no answer in scripts; fixed to say why and exit 1 -- same defect class yoyo drained Days 245-253 (usage printed + exit 0). (5) Bash tool asks before running which with flags outside a lookup set.