12-factor-apps 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.
12-factor-apps from leoyeai/agent-master-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add leoyeai/agent-master-skills/12-factor-apps@git:20260622.01fafd2Pins git:20260622.01fafd2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- leoyeai/agent-master-skills
- Path
skills/12-factor-apps/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260622.01fafd2, committed Jun 22, 2026
- Size
- 18,096 bytes
- Repository stars
- 2,168
- License
- MIT
Perform 12-Factor App compliance analysis on any codebase. Use when evaluating application architecture, auditing SaaS applications, or reviewing cloud-native applications against the original 12-Factor methodology.
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
# 12-Factor App Compliance Analysis > Reference: [The Twelve-Factor App](https://12factor.net) ## Overview The 12-Factor App methodology is a set of best practices for building Software-as-a-Service applications that are: - Portable across execution environments - Scalable without architectural changes - Suitable for continuous deployment - Maintainable with minimal friction ## Input Parameters | Parameter | Description | Required | |-----------|-------------|----------| | `codebase_path` | Root path of the codebase to analyze | Required | ## Analysis Framework ### Factor I: Codebase **Principle:** One codebase tracked in revision control, many deploys. **Search Patterns:** ```bash # Check for version control ls -la .git 2>/dev/null || ls -la .hg 2>/dev/null # Check for multiple apps sharing codebase find . -name "package.json" -o -name "pyproject.toml" -o -name "setup.py" | head -20 # Check for environment-specific code branches grep -r "if.*production\|if.*development\|if.*staging" --include="*.py" --include="*.js" --include="*.ts" ``` **File Patterns:** `.git/`, `package.json`, `pyproject.toml`, deployment configs **Compliance Criteria:** | Level | Criteria | …
Read the whole file at its exact version.
How to install
mdr add leoyeai/agent-master-skills/12-factor-apps@sha256:bd5a022d950fe8afThe line at the top of this page pins the label git:20260622.01fafd2, 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_mggsp3r2ojtngahc)
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Versions
The registry has recorded 1 version of this file, committed on Jun 22, 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 (18096 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
leoyeai/agent-master-skills · 2,168 stars · license MIT · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mggsp3r2ojtngahc GET https://markdownregistry.com/api/v1/resolve?ref=leoyeai/agent-master-skills/12-factor-apps GET https://markdownregistry.com/api/v1/blob/bd5a022d950fe8af6dda8b7c30a84aa5cc35fe22a1dc0ce8b205ce972b7a5d98
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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