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Second Brain: Changed My Mind Tracer

Traces where your recorded positions shifted over time, showing the old claim, the new claim, the dates, and the evidence that moved you.

Docs & OfficeIntermediate★ 288⑂ 50AI score 6/10Last updated: Sep 23, 2026

What it does

  • Scans your vault for superseded claims and contradictions between sources of different dates.
  • Reconstructs the sequence: what a page said, when, and what changed it.
  • Separates genuine revisions from plain factual corrections.
  • Surfaces still-unresolved contradictions as actionable follow-ups.
  • States how firm the current position is and what would move it again.

Who it's for

  • Obsidian / Logseq / markdown note-takers with dated, sourced concept pages
  • Researchers, PMs and writers doing quarterly reviews of their own thinking
  • Teams keeping decision records who need the change history, not just the latest answer

Examples

  1. "What did I change my mind about this quarter?" → topic-by-topic Was/Now/evidence report.
  2. "How did my view on remote work develop?" → chronological trace with the sources that shifted it.
  3. "Show only the contradictions I never resolved" → open-questions list for follow-up research.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/undefined-ui/second-brain-os/HEAD/skills/second-brain-changed-my-mind/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the skills/second-brain-changed-my-mind folder from the GitHub repo undefined-ui/second-brain-os into my ~/.claude/skills/second-brain-changed-my-mind/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/undefined-ui/second-brain-os.git && mkdir -p ~/.claude/skills && cp -r second-brain-os/skills/second-brain-changed-my-mind ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal.
  2. Clone the repo: git clone https://github.com/undefined-ui/second-brain-os.git
  3. Create the skills folder: mkdir -p ~/.claude/skills
  4. Copy the skill: cp -r second-brain-os/skills/second-brain-changed-my-mind ~/.claude/skills/
  5. Restart Claude Code, open your notes directory, and ask "what have I changed my mind about?".
  6. For best results make sure notes carry dates and sources; the skill depends on that time dimension.
View source on GitHub ↗License: MIT