Ruleloaded every turn

Cache hygiene

Keep the cached prefix stable mid-task: avoid model, effort, fast-mode, tool-set or MCP changes. Native cache behavior differs; do not assume identical invalidation rules.
Never wait in the foreground: no sleep over 30 s or poll loop; background it with an exit condition, or use Monitor.
New sessions start cold: batch small tasks; use the native fresh-session control, not compaction, unless cost allows it.