first-principles-review SKILL.md skillA
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.
mdr add sno-ai/sno-station-skills/first-principles-review@git:20261001.8e39fafPins git:20261001.8e39faf 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
skills/J-peer-review-and-audit/first-principles-review/skill/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261001.8e39faf, committed Oct 1, 2026
- Size
- 6,012 bytes
- Repository stars
- 481
- 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
mdr add sno-ai/sno-station-skills/first-principles-review@sha256:dacce3f6c385cfdaThe line at the top of this page pins the label git:20261001.8e39faf, 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_wydukctj4wplq36q)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 1, 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 (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
sno-ai/sno-station-skills · 481 stars · license Apache-2.0 · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wydukctj4wplq36q 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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