[react-compiler-healthcheck] Add --verbose to list components that failed compilation

[Hagnar]

What kind of issue is this?

• React Compiler core (the JS output is incorrect, or your app works incorrectly after optimization)
• babel-plugin-react-compiler (build issue installing or using the Babel plugin)
• eslint-plugin-react-hooks (build issue installing or using the eslint plugin)
• react-compiler-healthcheck (build issue installing or using the healthcheck script)

Link to repro

N/A — feature request.

Repro steps

Healthcheck only prints "Successfully compiled X out of Y components" and does not show which components failed.

Proposal: Add a --verbose flag to print for each failed component:

• file path
• location (line/column when available)
• error reason

The data is already collected in ActionableFailures / OtherFailures in reactCompiler.ts; it only needs to be printed when the flag is set. That would make it possible to fix remaining violations and to trust the reported counts.

Related: #29078 (closed), #29677 (open — "how do I find the remaining components?").

How often does this bug happen?

Every time

What version of React are you using?

19.2.4

What version of React Compiler are you using?

babel-plugin-react-compiler@1.0.0 (via Expo SDK 54); react-compiler-healthcheck@19.1.0-rc.3

[gaston98765]

Hello ,I noticed PR #35782 was closed because react-compiler-healthcheck is no longer maintained and may be removed, with a recommendation to use the ESLint plugin instead.
Would contributions be limited to documentation updates, or are there specific areas of code (for example ESLint integration or related tooling) where contributions would be welcome? I’d be happy to help in whichever area is most useful.