Notes from
the work.

Software, systems, and the things I’m learning along the way. From first principles to AI in production.

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A little theory. A lot of practice.

Paper charts with an olive scatter plot, histogram, and data table on a beige desk

Data6 min read

Publish metrics with explicit units and denominators

Calculate a combined request-quality SLI in SQLite, distinguish conditional denominators and fast errors, and bound the result when duration measurements are missing.

30 Oct 2026

Foundation

Data7 min read

Define data contracts beyond column types

Validate units, reporting scope, batch completeness and execution identity before computing a job-duration metric, while preserving legitimate empty results.

27 Oct 2026