Notes from the ceiling.

Spend postmortems, proxy internals, and the unglamorous work of making tokens behave like a budget line.

SEP 12, 2026

The $47k weekend: why agents need a kill switch, not a chart.

A recursive tool-caller with a polite temperature still drains a prepaid org. Dashboards explain the wreck. Hard caps prevent it. We reconstruct the trace.

Read the postmortem shape

AUG 28

Prompt cache is a budget feature

A 41% hit rate is not a latency flex. It is the cheapest cap you will ever set.

AUG 04

Virtual keys vs. a shared org secret

If six products share one live key, you do not have cost attribution. You have folklore.

What we will not write

Model leaderboards, prompt roundups, or host launch recaps. If a piece does not change how you set a cap, we keep it off the site.