fix: omit ancestor flags when a fish command skips flag parsing
The story of the bug "fix: omit ancestor flags when a fish command skips flag parsing" and how each model did on it.
Models fixed it in 6 of 6 recorded runs. The bug is in commit 7b83486 of the repository's git history and the real fix is commit ce39339. A model gets the code at the first commit and the repository's own tests decide if it fixed the bug.