Agent hooks: automate the small things you always forget

Everyone has:

• forgotten to update docs after changing an API
• forgotten to run tests
• forgotten to format/lint before committing

Then the PR turns red, CI fails, or a teammate has to remind you.

Kiro introduces agent hooks: agents trigger on events (like file save) so the “small stuff” becomes the default. References: Hooks overview and hook types.

1) What problem do hooks solve?

Hooks aren’t meant to “code everything for you.” They’re meant to:

• ensure standards are consistently applied
• reduce cognitive load
• make repetitive workflows reliable

You still review outputs—you just don’t have to remember to do the steps.

2) The highest-leverage hooks

In a Next.js/TypeScript repo, I prioritize:

• On save: run formatter / ESLint fixes (lightweight)
• On save: update snapshot tests (if used) or suggest relevant test scope
• On PR prep: generate changelog / PR summary
• On content update (blog): validate frontmatter, check broken links, estimate reading time

3) Safe automation principles

Automate—but keep it safe:

• auto-fix only deterministic changes (formatting, import ordering)
• changes with side effects (refactors, dependency bumps) should require confirmation
• always log output clearly so rollbacks are easy

4) Apply this immediately to the blog in this repo

For an MDX blog, a practical hook could:

• detect new files in content/posts/*.mdx
• validate required frontmatter
• enforce YYYY-MM-DD date formatting
• warn if the excerpt is too long or tags are missing

The goal: publish posts without debugging builds because of missing fields.

Closing

Hooks move agents from “respond on demand” to “actively maintain the repo,” so you can focus on what matters: product quality and user experience.