An AI agent with a wallet is a loop that spends money. Give it a budget — "$50/day, max $5 per call"...
An AI agent with a wallet is a loop that spends money. Give it a budget — "$50/day, max
$5 per call" — and you'd think the hard part is done. It isn't. The hard part is making the
budget hold when the agent fires ten calls at once. That's where most spend guardrails
quietly fail, and the failure is the worst kind: it looks like it's working.
This is the story of the bug that shaped Bridle, an open-source spend guardrail for agentic
been building AI agent infrastructure for the past few months. The two things that kept biting me — ...
Hey Dev, I built the first tool that gives developers hard spending limits inside AI agents — instead...
Every AI agent monitoring tool will tell you when you've gone over budget. Almost none of them will...
I've been building agents for a few months and the failure that scared me wasn't a crash, it was...
A reproducible, one-command benchmark of capping a runaway agent's bill. The honest result isn't '60% cheaper' -- it's a flat…
A practical guide to preventing runaway LLM costs in multi-agent systems using budget guards, circuit breakers, and…
