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second-brain-changed-my-mind

100 / 100 · Low risk

Fine to try.

By undefined-ui/second-brain-os (GitHub) · coding · 1,564 stars · scanned at commit 53aea82

Trace where the user's recorded position on something has shifted: superseded claims, contradictions between sources of different dates, and what evidence moved them. Use this skill when the user asks what they have changed their mind about, how their thinking on a topic developed, what they used to believe, or wants a quarterly look back at their own positions. Do NOT use for finding contradictions between sources with no time dimension, or for a current-state answer.

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

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

if [ -e ~/.agents/skills/'second-brain-changed-my-mind' ] || [ -L ~/.agents/skills/'second-brain-changed-my-mind' ]; then echo 'A skill folder named second-brain-changed-my-mind already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/undefined-ui/second-brain-os' "$d" && git -C "$d" checkout --quiet '53aea8231aff3024352e21839dc08668f7ecc0b9' -- 'skills/second-brain-changed-my-mind' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/second-brain-changed-my-mind' ~/.agents/skills/'second-brain-changed-my-mind' && 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/'second-brain-changed-my-mind' ~/.claude/skills/'second-brain-changed-my-mind' (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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