Topic
Agentguard
59 posts on agentguard — guides and lab notes from real runs on hardware we own. New posts land here automatically. Start anywhere, or grab the copy-paste prompts that ship with them.
- 5 min read
GPU Prices Up 48% in Two Months. I Run LLMs in My Garage.
Blackwell rental hit $4.08/hr. CoreWeave raised prices 20%. Anthropic restricted their newest model to 40 orgs. Meanwhile, consumer GPUs are sitting idle.
- 5 min read
When to Replace Your AI Agent With a Script
Will Larson says agents should be scaffolding, not permanent infrastructure. I run 12 agents overnight. Here's what I kept as agents and what I converted to code.
- 5 min read
Your AI Agent's MCP Server Is a Security Hole
1 in 35 GenAI prompts carries high risk of data leakage. MCP makes the attack surface worse. Here's what builders need to know.
- 6 min read
Anthropic's Advisor Tool Is the Cost-Split Pattern You Should Already Be Running
Anthropic shipped a pattern where a cheap model runs the loop and escalates to Opus only when it needs to. The pattern works on any two-model setup. Here is the math and the playbook.
- 7 min read
We Built Martin Fowler's Feedback Flywheel Before He Published It
Martin Fowler published a pattern for turning individual AI interactions into collective improvement. We had already built it. Here is how our 12-agent vault system maps to his four signal types.
- 7 min read
Three Studies This Month Changed Everything About AI Agent Safety
Mythos found zero-days in every major OS. Nature documented AI deception in peer review. War games showed AI escalating to nukes. Three studies, one conclusion: your agents need hard limits.
- 5 min read
Meta Burned 60T Tokens: Cap Your AI Agent Budget in 3 Steps
Your AI agent bill is climbing and nobody set a cap. Meta burned 60T tokens across 85K staff in 30 days. Here are the 3 budget controls they skipped — and guardrails that catch overruns early. (2026)
- 6 min read
9 Out of 428 LLM API Routers Are Injecting Malicious Code Right Now
Researchers tested 428 LLM API routers. Nine were actively injecting malicious code. One drained ETH from a private key. Here is what this means for your AI agents.
- 3 min read
AI Chose Nukes 95% of the Time. Here's What That Means for Your Agents.
Three AI safety papers came out this week. Reading them back to back was jarring. If you run agents in production, this is worth 5 minutes.
- 8 min read
We Built Fowler's AI Feedback Flywheel (Before He Named It)
Martin Fowler named the AI feedback flywheel. We built the same system independently. Here's our exact implementation — vault, agents, guardrails, and weekly cadence.
- 8 min read
Stop Runaway LLM Spend: AI Agent Cost Control (Python)
One bad loop and an AI agent burned $200 in minutes. AgentGuard is a Python SDK that enforces hard cost limits at runtime — here is how to ship it.
The AI agent build notes
Real costs, real tools, no fluff. M-F when I ship, publish, or learn something worth sending.