Help me set up cost monitoring and budget alerts across every service my app pays for, so no bill can surprise me. 1. Inventory: list every service with usage-based or scaling pricing: hosting/compute, database, file storage and bandwidth, email sending, payment processing fees, AI/LLM APIs, error tracking, monitoring, and any third-party API with per-call pricing. 2. Budget alerts: for each service that supports it, configure a monthly budget with alerts at multiple thresholds (50%, 80%, 100%) going to an email I actually read. For AWS/GCP/Azure, set up their native budget alerts. For services without budget tooling, note the gap and set a calendar reminder to check monthly. 3. Usage anomaly signals: for the services where a bug can cause a bill spike (AI APIs, email sending, bandwidth), add the usage-based alert if the provider offers one, or a lightweight check in my own app (daily usage count logged, alert if it exceeds a sane multiple of normal). 4. Code-level guards: for AI/LLM calls and other per-request costs, add server-side caps: max tokens per call, per-user rate limits, and a daily hard ceiling that fails closed (returns an error) instead of an open wallet. 5. Kill switches: for the most dangerous services, document how to disable the integration fast if spend runs away (revoking an API key, toggling an env var). Do not set alerts so low they become noise; base thresholds on a realistic monthly estimate and tell me what you assumed. Do not add cost logging that itself spams a paid logging service. Give me: the service inventory with pricing model per service, the alerts configured and their thresholds, the code-level caps added, and the kill switch notes.