Backlog moved to GitHub Issues

This file was the housekeeping backlog until 2026-10-18. Its open items are now issues on chrisallenuk/bullet-heaven and the Dark Cosmos project board; the old text is in git history (git log -- NEXT_TASKS.md).

File new work with scripts/dev/file-issue.sh. List it with gh issue list --repo chrisallenuk/bullet-heaven. A gate test (scripts/test/next-tasks-frozen.test.mjs) keeps this file from growing a backlog again.