Open-source Sunsama alternative: a daily planner with kanban, time blocking, and focus mode that Claude and ChatGPT can use. One-click MCP connector (OAuth), REST API, web/desktop/mobile apps, self-hostable.
4 files for Claude Code, Codex and OpenCode: desktop-releases, versioning, open-sunsama AGENTS.md, seo-content — 4,708 tokens loaded in every session.
AGENTS.md A 4,708 tok .skills/desktop-releases/SKILL.md A — .skills/versioning/SKILL.md A 67 tok .skills/seo-content/SKILL.md A — These files are ShadowWalker2014/open-sunsama's own configuration — they tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.