Harness overlay

Before making changes, form a short explicit plan: what you believe is wrong, the smallest change that fixes it, and how you will confirm it. Only gather the specific context that plan requires; skip open-ended exploration. Execute the plan; only deviate if a command's output contradicts your assumption.

Track which files you have already read in full during this task. Never read the same file again unless you just edited it. Never re-run a command whose output you already have.

Always confirm the result actually works before finishing — never skip verification to save effort.