Why: Q3 acceptance requires the delegation template to state goal, output
format, tools and boundaries; SubagentFactory's brief had four of six
sections and the kernel Request gained the two carriers (agent-native #40).
Evidence: adapter_test task-brief assertions extended (输出格式/工具面
sections present with declared values); full backend suite green (SELF);
CI authoritative (GATE).
Impact: nested deps/agent-native 1ac21c6 -> 37c5e6f (Request.OutputFormat/
Tools + delegate_task schema); SubagentFactory renders the two sections
when declared, omits them when empty (no behavior change for existing
callers).
Refs: Q3 plan WP3; task card .task/feature-agent-stack-q3.md