Game-agnostic versions of the fnv-coop testing tools (from fnv-coop f57aa78) under tools/<name>/,
each with tests, mutation twins and one ALL OK command; tools/test_all.py runs them all.
Nine playbook pages, a coop-sync-testing skill, a get_test_tool MCP tool, and links from the
README, AGENTS.md, automated QA and tool catalogue pages.