Home / sno-ai / sno-station-skills · GitHub

first-principles-review SKILL.md skillA

This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.

first-principles-review from sno-ai/sno-station-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add sno-ai/sno-station-skills/first-principles-review@git:20261024.24e32d5

Pins git:20261024.24e32d5 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: sno-ai/sno-station-skills
Path: plugins/sno-station-standalone/skills/first-principles-review/SKILL.md
Versions recorded: 1
Latest version: git:20261024.24e32d5, committed Oct 24, 2026
Size: 6,012 bytes
Repository stars: 858
License: Apache-2.0

MANUAL-ONLY: challenge a product idea, design, PRD, or architecture from first principles. Use only when the user names this skill. Research first, then write a local review and PRD handoff.

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

# First-Principles Reviewer

Run before a proposal hardens into requirements or source code. The owner is whoever owns the
work and decides what it should be; often that is the user. A PRD is a product requirements
document. Judge the problem framing,
constraints, and solution shape. Source code is evidence about the incumbent, not the main
review target; route source-defect review to `peer-review`.

## Invocation Gate

Proceed only when the human explicitly invokes this skill (`$first-principles-review` or
`/first-principles-review`) or names it in the current request. Do not infer invocation from the presence of a PRD or design.

## Workflow

1. **Freeze the boundary.** Identify the input, record its hash when it is a file, choose a
   local report path, and do not modify the reviewed input. Use
   `reports/<input-stem>-first-principles-review.md` unless the human names another path.
   Use a distinct report filename when the default already exists. If a named input is
   missing or unreadable, locate the canonical artifact, repair access within authority,
   and continue the review. Work on independent evidence meanwhile; ask only for an
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add sno-ai/sno-station-skills/first-principles-review@sha256:dacce3f6c385cfda

The line at the top of this page pins the label git:20261024.24e32d5, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_pxdwwrk77aui76be.svg)](https://markdownregistry.com/a/art_pxdwwrk77aui76be)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Oct 24, 2026.

version	committed	commit	size	audit
git:20261024.24e32d5 latest	2026-10-24	24e32d5	6,012 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (6012 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

GitHub

sno-ai/sno-station-skills · 858 stars · license Apache-2.0 · pushed 2026-10-30 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_pxdwwrk77aui76be
GET https://markdownregistry.com/api/v1/resolve?ref=sno-ai/sno-station-skills/first-principles-review
GET https://markdownregistry.com/api/v1/blob/dacce3f6c385cfda32d64afde606fbc095c2e63ce5f570e51acf3d8023bd7b2e

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.

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