Do not ask whether the agent follows the rule. Ask what stops it when it does no
Source
alphasignal.ai
Author
AlphaSignalAI
Date
Why it matters
system promptThe standing instructions a model receives before any user input — defining its role, rules, tools, and tone for the whole conversation.Full definition → rules do not stop an AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition → that decides deleting the database is correct. Enforcement has to sit in the sandboxAn isolated environment where AI-generated code or agent actions run without being able to touch anything real.Full definition →, the container lifecycle, and an outbound network proxy that can block and escalate.
Terms in this piece · Glossary
guardrails — The checks around a model that block bad inputs and outputs — filters, validators, and permission rules the model itself can't override.
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
system prompt — The standing instructions a model receives before any user input — defining its role, rules, tools, and tone for the whole conversation.
sandbox — An isolated environment where AI-generated code or agent actions run without being able to touch anything real.
postPrompt cache TTL is the hidden line item in long coding-agent sessions
articleFull breakdown: Claude-only apps often wait until the host speaks the new revisi
articleFull Breakdown: When can a change ship unread? When something cheap and hard to 
postWe put $2,500 on the first person who could get a pizza delivered to the room by
