Word game: repeated letters marked wrong, a keyboard that loses greens, and the words still possible

Context

Welcome to the games team. wordgame/ scores guesses in our daily five-letter word game; the rules are in README.md. Two bugs came in from players, and the hint panel needs a new function.

You have 30 minutes. The checks are graded one by one, so each part you get working counts even if the rest is not done.

WG-1: Repeated letters get too many yellows

Report

The answer was abide. I guessed speed and both es came back yellow, but abide has only one e.

Acceptance criteria

• Each letter of the answer is used by at most one mark: greens first, then yellows from left to right, as the README describes.

WG-2: The keyboard turns a green letter yellow

Report

c was green on the keyboard after my first guess. My second guess had c in another place, and the keyboard showed it yellow.

Acceptance criteria

• keyboard shows each letter's best mark so far (G, then Y, then -), whatever the order of the guesses.

WG-3: The words still possible (new, level 3)

Acceptance criteria

• remaining(words, history) returns the words that could still be the answer, in list order, as the README describes.

Notes

• Run pytest tests/visible. Three tests fail on the current code.
• Practice task modelled on a candidate's report of Bloomberg's new-grad software engineering interviews, where one round was the checker for a five-letter word game. Original StackYard code, not the actual question; not affiliated with Bloomberg.