StackToHeap

No Overflow. A blog about software development, DevOps, and everything in between.

ai software-architecture developer-tools

Two Harnesses Walk into a Claude Subscription

OpenCode and Pi (via pi-claude-code) can both use a local Claude Code login. OpenCode keeps a Claude Code session open across tool calls, while Pi runs a fresh worker for each step and replays the transcript.

• 15 mins
ai software-architecture developer-tools

Code Mode That Survives a Crash: Durable Scripts in Pi Durable

Code mode lets the model write a script that calls tools. Pi Durable makes that script resume after a restart without rerunning finished calls. What code mode is, how durable replay works, and when to reach for it.

• 15 mins
ai machine-learning

OpenAI Decisions API: How Does Jev's Big-Lab Competitor Fare?

OpenAI's Decisions API brings a big-lab competitor to Jev. How do their contracts, limits, accuracy, latency, and costs compare on BANKING77?

• 7 mins
ai software-architecture developer-tools

Pi Durable: A Look at the Future of Agent Harnesses

Pi Durable's building blocks: persisted tasks, conversations, application state, and agents whose work can survive the process that started it.

• 10 mins
ai machine-learning

DSPy ♥ Jev: Typed Decisions, One Program, and ReAnchor

DSPy gets first-class support for System One models, plus an optimizer for tuning how programs act on their decisions.

• 14 mins