Thanks for the PR,@bradzacher!

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Nice, thanks! I'll check this out when this lands in@typescript-eslint/utils@6.11.1 or@typescript-eslint/utils@6.12.0

For visibility, we publish canary builds on every commit tomain:https://main--typescript-eslint.netlify.app/users/releases#canary.

(not saying you need to try them - just that if anybody urgently wants this ASAP, the canaries are an option 😄)

Ok thanks, I decided to try out the canary / alpha releases and upgraded to@typescript-eslint/*@6.11.1-alpha.20 here, and simplified some types:

upleveled/eslint-config-upleveled@bb2a860#diff-e727e4bdf3657fd1d798edcd6b099d6e092f8573cba266154583a746bba0f346

Notes:

The reason I'm still casting like this is that I want a runtime error ifeslint-plugin-jsx-a11y stops distributingconfigs.recommended.rules.

// eslint-disable-next-line rest-spread-spacing -- Allow JSDoc casting.../** @type{Exclude<Exclude<import('@typescript-eslint/utils/ts-eslint').FlatConfig.Plugin['configs'],undefined>[string],undefined>}*/(/**@type {Exclude<import('@typescript-eslint/utils/ts-eslint').FlatConfig.Plugin['configs'], undefined>} */(jsxA11y.configs).recommended).rules,

An alternative that I used lower down (to throw a more helpful error) is to first assign the potentially-undefined config object to a variable and then do some manual testing on it and throw if it's not the right shape, which will narrow the type and allow usage without casting:

constfirstConfig=config[0];if(!firstConfig||!firstConfig.plugins||!firstConfig.rules){thrownewError(`SafeQL configuration failedThe UpLeveled ESLint config object does not contain all of the properties: .plugins, .rules`,);}firstConfig.plugins['@ts-safeql']=awaitimport('@ts-safeql/eslint-plugin');firstConfig.rules['@ts-safeql/check-sql']=[// ...

@karlhorky FYI you're doing things a little incorrectly here!
Specifically the type of the plugin isn't aFlatConfig.Plugin because the plugin doesn't support flat configs yet.

If you have a look at#7935 you can see how I typed things.

We can probably expose better types here though to make this easier. I.e. We should probably expose a type likeFlatConfig.ClassicPlugin<T> whereT can be used to define the shared configs.

You also should be using the compat tooling instead of deeply pulling apart the config. I still don't know the "best" way to do this style of "extend multiple configs for a given set of files. I asked on E ESLint discord (https://discord.com/channels/688543509199716507/1174310123791990866) but I got ignored... Might need try pinging again.

Yeah, I'm aware I'm faking the types a bit in some places (this is to avoid having to know / keep updated on which plugins expose which type of config). Maybe I should open PRs to add types to each of the plugins I use... 🤔 so that I don't need to maintain them in my project - and then all consumers will have types.

This ESLint config is pretty runtime-tested as is (in many student projects), so it's mostly just making the type system happy and reducing the faking to the least amount possible.

But I will for sure watch all new things including#7935 and use anything to make it simpler!