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bttf

97 / 100 · Low risk

Fine to try.

By MadBomber/experiments (GitHub) · other · 11 stars · scanned at commit 8139ff6

Use the bttf CLI for datetime arithmetic, formatting, timezone conversion, and duration calculation. Reach for this instead of doing date math mentally — LLMs are unreliable for datetime computation, especially across DST boundaries and leap years.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'bttf' ] || [ -L ~/.agents/skills/'bttf' ]; then echo 'A skill folder named bttf already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/MadBomber/experiments' "$d" && git -C "$d" checkout --quiet '8139ff68e8895b544661aa2ba8b53268d68652bc' -- 'ai_misc/skills/bttf' && mkdir -p ~/.agents/skills && cp -R "$d"/'ai_misc/skills/bttf' ~/.agents/skills/'bttf' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'bttf' ~/.claude/skills/'bttf' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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