Agent testing.
Test tool calls, side effects and regressions.
How to test a Slack bot
How to test a Slack bot: mock the client, fake the Slack API, use a test workspace or run a local replica. What each catches, what it misses, and the tools.
Putting Harness² on call
We ran Google Research's Harness² on an on-call agent in Ancha worlds. With Claude Opus 4.8 as the editor it found a one-paragraph fix that took a failing task from 0 of 3 to 2 of 3.