Free Lesson
Build a Claude Code Verification Harness
60 min
Oct 8, 2026 12:00 PM
What you'll learn
Add static analysis gates
Reject code automatically before it merges or deploys, when it breaks your engineering rules.
Write holdout tests
Check behaviour with tests the implementing agent cannot see or tune itself against.
Build a Doer and Tester loop
Send failed work back to the agent with the reason until it passes or escalates.
Wire the verification harness
Connect gates, holdout tests and the Doer and Tester loop into one run that passes or fails.
Why this topic matters
Claude Code writes code that looks right. In one hour we build the harness engineering pattern that makes it prove the code works before you review it. We build static analysis gates, holdout tests the implementing agent never sees, and a Doer and Tester loop that sends failures back with the reason attached. The same harness works with Codex and Cursor. Part 3 of 4 in the Software Factory series.
