Optimize Suspenders for "Harness Engineering"

[stevepolitodesign]

"Harness Engineering" is an emerging concept that might be worth exploring. At a high level, Suspenders might benefit from added constraints and guardrails such as more linting rules and a default CLAUDE.md file.

[stevepolitodesign]

This relates to 1351.

[jaredlt]

I think the Rails AI rules in our guides would be a good start. Myself and @laicuRoot use them with good results.

[stevepolitodesign]

We adding these rules in #1352

[stevepolitodesign]

I think the next step is to tighten up our linter.