second-brain-changed-my-mind SKILL.md skillA
second-brain-changed-my-mind from undefined-ui/second-brain-os is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add undefined-ui/second-brain-os/second-brain-changed-my-mind@git:20260908.1615b29Pins git:20260908.1615b29 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- undefined-ui/second-brain-os
- Path
skills/second-brain-changed-my-mind/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260908.1615b29, committed Sep 8, 2026
- Size
- 1,942 bytes
- Repository stars
- 1,499
- License
- MIT
Trace where the user's recorded position on something has shifted: superseded claims, contradictions between sources of different dates, and what evidence moved them.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.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Trace changed positions This is the query a vault can answer that nothing else can, and the reason the supersession rules exist. It only works because contradictions are recorded rather than overwritten. ## Core rule Report the change with both positions, both dates and the evidence between them. A conclusion without its history is just the current claim. ## Workflow 1. **Find superseded claims** across concept pages, and contradictions where the sources differ in date. 2. **Reconstruct the sequence:** what the page said, when, based on what; what changed it, when. 3. **Distinguish real revision from correction.** A factual error being fixed is not a change of mind. A conclusion being revised on better evidence is. 4. **Flag unresolved ones.** Contradictions still sitting open are the most actionable output here. 5. **Say how firm the current position is,** based on what moved it. ## Output format ``` ## <topic> Was: <claim> (<source>, <date>) Now: <claim> (<source>, <date>) What moved it: <evidence> Firmness: <what would move it again> ## Still unresolved <contradictions with no current position> ``` ## Calibration …
Read the whole file at its exact version.
How to install
mdr add undefined-ui/second-brain-os/second-brain-changed-my-mind@sha256:28ca1e466183c317The line at the top of this page pins the label git:20260908.1615b29, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ra3b554bwsmehpio)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 8, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (1942 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
undefined-ui/second-brain-os · 1,499 stars · license MIT · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ra3b554bwsmehpio GET https://markdownregistry.com/api/v1/resolve?ref=undefined-ui/second-brain-os/second-brain-changed-my-mind GET https://markdownregistry.com/api/v1/blob/28ca1e466183c317f111a9d198c009ca87ddd1dcd98041bd21c2597418b8c0a4
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.