Section
AI Core Skills
One in-demand AI skill at a time: what top roles pay for it, where it came from, how to do it with AI, how to check your work, and a kit you can use tonight.
#1 Agent evals
- Agent evals: the short versionWhat top PM roles pay for agent evals, what an eval actually is, and the kit you can use tonight.
- What top PM roles pay for agent evalsThe real job postings, checked, and an honest read on what the numbers mean.
- Where agent evals came from, and what they meanFrom 1930s holdout tests to agents that cheat on benchmarks: why evals exist and why it's a PM skill.
- How to build an agent eval with AIWhat AI does and what you do, step by step, with real task files, graders and a judge prompt.
- How to validate your agent evalEight gates that prove your eval measures what you think it measures, with real results.
- The agent evals kitThe Claude Code skill, two agents, ten prompts, the repos and seven practice builds.
- Agent evals reference: real tasks, tools, learning pathReal benchmark task files, the October 2026 tool landscape, a learning path, the interview angle, and sources.