BackMark transforms plain Markdown files into a powerful task management system designed specifically for "vibe coding" - seamless human-AI collaboration. Unlike traditional tools, BackMark treats AI as a first-class team member with dedicated spaces for planning, documentation, and self-review. Every task is stored as a simple .md file with YAML frontmatter - future-proof, Git-friendly, and completely portable. No databases, no cloud, no vendor lock-in.