second-brain-write skillA
second-brain-write is agent-read markdown (skill) from undefined-ui/second-brain-os: Draft from the vault: outline from concept pages, keep citations to the user's own sources, and surface where their material disagrees. Use this skill when the user wants to write an article, post, essay or newsletter based on what they have collected, or asks what they could write about a topic. Do NOT use for research reports, for writing with no grounding in the vault, or for editing text the user wrote themselves unless asked..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Write from the vault The research is already done, cited and connected. What is left is the argument, and that is the part the user should keep. ## Core rule Assemble structure and evidence. Do not hand back finished prose as if it were theirs. ## Workflow 1. **Find the relevant concept pages** and say what they collectively argue. 2. **Surface the disagreements.** These are where the user has something to say that is not the consensus view, and they are the most useful part of the outline. 3. **Build the outline** from pages, each point tied to the page behind it. 4. **Mark the weak points:** claims resting on one source, self-reported figures, anything the vault flags as unverified. 5. **Draft only if asked,** and say plainly that the phrasing is a first pass to be rewritten in their voice. 6. **Offer to ingest the finished piece** back as a source once published. ## Output format ``` Angle: <what this piece argues that the sources do not individually> Outline: 1. <point> - [[page]], [[page]] Weak points: <claims with thin support> Missing: <what would strengthen it> ``` ## Calibration …
Read the whole file at its exact version.
How to install
mdr add undefined-ui/second-brain-os/second-brain-write@git:20260908.1615b29mdr add undefined-ui/second-brain-os/second-brain-write@sha256:223b87fc891396a3Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_7xwqq4iuz52ziprr)
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Versions
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 (1919 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 · 296 stars · license MIT · pushed 2026-09-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7xwqq4iuz52ziprr GET https://markdownregistry.com/api/v1/resolve?ref=undefined-ui/second-brain-os/second-brain-write GET https://markdownregistry.com/api/v1/blob/223b87fc891396a3a35425fa7e6f43fe7ab47ce1ca3f6dc372f41de2b8ac531c
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