Agentic Validators

Goal

Turn “agent wrote code” into “agent wrote code and the change is validated automatically.”

This skill helps you:

• choose the right validation strategy (per-file vs repo-wide)
• implement post-tool-use and stop hooks
• create narrow validators (fast, deterministic checks)
• structure work so multiple agents can run in parallel without losing correctness

Mental model

• Agents are non-deterministic; validators are deterministic.
• Context is fragile; validation + logs are durable.
• Prefer small, fast checks close to the change (per-file) + a final global gate (repo-wide).