"Might could" sounds natural to you but it's a double modal in English
Non-native English speakers — especially those whose native language stacks modals freely — sometimes write things like:
"One thing we might could improve..."
This is a double modal. It exists in some regional American dialects (Southern US) but is grammatically incorrect in standard and professional English. Pick one modal: might or could.
The right choice depends on intent:
- "One thing we could improve" — confident suggestion, implies you see a concrete area to fix. This is usually what you mean.
- "One thing we might improve" — tentative, sounds like you're unsure whether improvement will happen at all. Weaker than you probably intend.
- "One thing we might want to improve" — works, but adds unnecessary words. "Could" is cleaner.
The other trap in the same sentence: "the pipeline I re-run" vs "the pipeline I reran". "Re-run" is the present tense or a noun; if the action already happened, it's reran (past tense).
The corrected sentence:
"One thing we could improve: even though the deployment failed, the pipeline I reran still reported 'All Good'."