0.16.0

Changed — may break callers

• mail runs on cli-core 0.569.0: an agent schedule runs on Sonnet, starts lean and stops for the day at a cost
  cap. mail <profile> schedule agent takes --model <model> and --max-cost-per-day <usd>. Without them a claude
  schedule runs on sonnet and a codex one on codex's own default, a new claude schedule starts without your MCP
  servers, skills, settings and CLAUDE.md, and no run starts for the rest of the day once the day's runs cost 5 US
  dollars. schedule_model_claude, schedule_model_codex, schedule_lean_start and schedule_max_cost_per_day in
  the config file's defaults change that for every new schedule; mail config show lists them.