The Chronicles of Zurdo & Carol

Zurdo and Carol in practice.

Zurdo · 2026-11-03

Building Numeron's tax engine with Zurdo

How Zurdo builds Numeron's tax engine: one PRD per change, goldens frozen before the generator, and a criterion that scores every golden through the real engine.

Carol · 2026-11-03

Handoff debt, and the files that pay it down

A 2026 paper measured what it costs a coding agent to take over another's unfinished work. Here is what it found, and how Carol's handoffs and planning files are built around it.

Zurdo · 2026-10-11

Building this site with Zurdo

How Zurdo built the Site launch initiative, 66 tasks across 14 PRD runs, checking every criterion against the working tree itself, and what happened around the runs.

Carol · 2026-10-11

Planning in the open with Carol

How Carol mirrored the whole Site launch initiative onto GitHub, from scope and tickets to 14 PRDs and their run status, and how the read-only views keep it honest.