Show HN: Limits – Control layer for AI agents that take real actions
thesvp Wednesday, February 25, 2026
Prompt instructions like 'never do X' don't hold up in production. LLMs ignore them when context gets long or users push hard.
Limits sits between your agent and the real world. Every action — database writes, API calls, refunds — gets intercepted and checked against your rules before it executes. Deterministically. No LLM involved in enforcement.
Three modes:
Conditions: hard rules on structured data Guideance: validate LLM output before it reaches the user and give the agent chance to reason and retry Guardrails: scan for PII, toxicity, prompt injection etc
One line to integrate: npm install @limits/js
our website: https://limits.dev
our docs: https://docs.limits.dev
We've processed 30,000+ policy checks across 16 teams. Would love feedback from anyone who's built something like this internally."