Turn the git history of every repository you own into one repo-* skill per repo - stack, real verify commands, defect classes that already shipped (with commit hashes and root causes read from the diffs), hotspot files and non-negotiables - plus a lessons skill for classes that recur across repos. Use when setting up crossbrain for the first time, when adding a repo, when `crossbrain drift` shows fixes newer than a skill, or when asked to "learn from my repos / commits / past mistakes".
