Function default_sync_timeout_secs 

pub fn default_sync_timeout_secs() -> u64

Built-in default sync-launch timeout ceiling (GH #33 Guard 2), seconds. 3600s / 60 min — sized for LLM-driven agent flows where individual spawns routinely take 60-180s and full phases run 20-40 min. The previous 300s ceiling under-shot the primary workload; users hitting it were legitimate long-running runs, not stuck ones. Callers who want faster fail-loud can override per-request (TaskLaunchRequest.timeout_secs) or server-wide (config or CLI). GH #39.