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Notes on AI agents, real-time infrastructure, developer tools and the systems underneath them.
- One start per pull request A skill that turns a GitHub Actions CI with one machine per job into one heavy job per run, for runner providers that bill or cap per machine start.
- The client pays for the limits An opencode plugin that keeps long agent sessions alive under RunInfra's request limits, and how my first fix quietly broke prompt caching.
- A benchmark is a design tool I evaluate models before I trust them, and the evaluation usually changes the architecture rather than the model.
- The seam is the product Why the interesting engineering happens where hardware, protocols, models and unit economics meet.