Ralph to /goal: How a Bash One-Liner Became a Product Feature
You type /goal all tests in test/auth pass, switch the session to auto mode, and go to lunch. When you come back the goal is marked achieved. You run the sui...
Recent posts
A Vietnamese Phone Receptionist on a Laptop CPU: Rules First, LLM Last
The caller says “cho tôi đặt bàn bốn người tối mai lúc sáu giờ” — a table for four, tomorrow at six — and stops talking. On a laptop with no GPU, a 1.7B mode...
Agent Separation of Duties: The Architecture That Dropped Attack Success from 98% to 7%
A prompt-injection attack on a naive agent is almost guaranteed to succeed. In a preprint that surfaced in MIT’s weekly research digest for the week of Septe...
Cheap LLM Agent Monitoring: How a Small Trained Monitor Beats Frontier Judges
Your agent just ran git push --force origin main. You see the tool call in the log. You see the output. What you do not see is why it decided that was a good...
Architecture Diagrams That Fail Like Code: Archify in Practice
The architecture diagram in your README is a PNG someone exported from a whiteboard tool eight months ago. It still shows the session cache you deleted in sp...
Cursor Agent Picking the Wrong Skill? How pstack Routes Around It
You install a pack of forty-odd agent skills, type “check on PR 123”, and two of them light up. One is the pack’s carefully written PR-babysitting playbook. ...
Python 3.15 Lazy Imports Move Your Failures Into The Request Path
Your deploy goes green. The readiness probe is happy and the pod has been up for ninety seconds. Then the first real checkout request arrives and returns a 5...
The Span Attribute That Blew Up Your Observability Bill
Finance wants to know why observability went up forty percent month over month, and you check span volume first because that is the number everyone reaches f...
The NATS JetStream Dedup Window That Outlives Your Message
Your worker acks a payment-capture message, the stream drops it — messages: 0, confirmed — and thirty seconds later a legitimate retry for the exact same ord...
Test Selection Breaks Before Your Tests Do
In March, a small internal service at Anthropic hit its memory ceiling “by mid-afternoon on most weekdays.” Not the test runners. Not the queue. The thing th...
Postgres Connection Pooling Under Sustained Load
At 02:40 the nightly reconciliation job stops running. Not crashing — stopping. The scheduler says it dispatched the run, the worker log says it acquired the...
Free-Threaded Python on a Real Workload
You swap python for python3.14t, run the four-thread benchmark that has been sitting in the repo since the no-GIL argument started, and watch it finish in a ...