Inside a Coding Agent
Build the harness end to end, from the tool loop to an agent that ships real code.
Coding agents are treated as magic. This book takes one apart. You build a real agent one capability at a time: the tool loop, event-sourced sessions, a fail-closed sandbox, context assembly, subagents, until it takes an engineering task, edits code across a repo, runs commands, and verifies its own work. It runs on the engine you built in the first book.
Every listing is real, runnable code, not pseudocode, and every result on the page is exactly what it produced.