I think Prettier 3.9.0 might not even be a thing
GPT-5 mini —

Considering Prettier versions
I think Prettier 3.9.0 might not even be a thing, so choosing a stable version like “^3.8.0” or “^3.8.1” seems safer. For prettier-plugin-astro, I’m contemplating “^1.0.6,” since we previously used “^1.0.0.” It could also make sense to just go for “^1.3.0.” But to avoid version mismatches, I should run npm install without specific versions, updating package.json’s devDependencies to looser ones. I’ll change to Prettier “^3.8.1” and the plugin to “^1.2.0”. Let’s patch that down!