- Background procs get timeout=0 (no deadline) set by toolsrv at
the execution layer — not injected as an arg from olliesrv.
Foreground default remains 30s. User can still override via args.
- Timeout logic simplified: caller sets default, ExecuteTool honors it.
- System prompt: clarify background has no timeout, uses 'stop' not 'kill'
- architecture.md: document lifecycle (connection-based ownership)
- evolution.md: update interrupt section with streaming, lifecycle, id= format
- README.md: add parallel execution to capabilities table
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