- Token cost tracking: accumulate input/output tokens per subagent,
include in announce messages and persist to DB
- Per-edition rate limits: MaxSubagentConcurrent/Depth on Edition struct,
tenant-scoped concurrency enforcement in Spawn/RunSync
- WaitAll action: spawn(action=wait, timeout=N) blocks until all
children complete, returns merged summary
- Auto-retry: configurable MaxRetries (default 2) with linear backoff
for transient LLM failures
- Producer-consumer announce queue: merges staggered subagent results
into single LLM run (same pattern as team task announces)
- Raw metadata in bus messages to prevent double-formatting
- Fire-and-forget DB persistence with detached context + tenant scope
- Split oversized files for <200 line compliance
