fusion-invariants-lint-manual-run-allows-drift

fusion-invariants-lint.py was run manually to produce a 71/71 PASS result, but was not wired as a PreToolUse hook or git pre-commit. Without automated enforcement, skill drift can accumulate silently between manual runs. The lint must be wired as a PreToolUse hook on Write/Edit operations targeting /root/.claude/skills/**/SKILL.md to prevent regression.