Topics · Concept
Observability
Seeing what a running system does: traces, metering, glass-box infrastructure, and what not to log.
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- Reliability
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On the map 2 pages and the topics around it
2026
- 10 min
The Bill Is Part of the Loop
Every model response already carries its own bill in the usage field, and the loop throws it away. This post reads that field, prices it against a table, and turns cost into a value the loop can see per turn and act on: a metering decorator that needs no loop change, a running ledger, prompt-cache accounting that moves the number the most, and a budget that degrades before it stops. Part eight of The Agent Platform Handbook.
- 18 min
What Zentinel Is Really Optimizing For
Every major proxy was a product of its time. Zentinel is built for this one: safety, operability, and the operator's ability to sleep.