Home / kunolu / 640-skills · sbtd-workflow-onboard/assets/external-skills/stable/skills/codebase-design/SKILL.md · GitHub

codebase-design skillA

Name: codebase-design
Author: kunolu

This file is byte-identical to the first copy the registry indexed, one of 9 copies on public GitHub. Same content hash, same audit grade.

codebase-design is agent-read markdown (skill) from kunolu/640-skills: Shared vocabulary for designing deep modules. Use when the user wants to design or improve a module's interface, find deepening opportunities, decide where a seam goes, make code more testable or AI-navigable, or when another skill needs the deep-module vocabulary..

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

# Codebase Design

Design **deep modules**: a lot of behaviour behind a small interface, placed at a clean seam, testable through that interface. Use this language and these principles wherever code is being designed or restructured. The aim is leverage for callers, locality for maintainers, and testability for everyone.

## Glossary

Use these terms exactly: don't substitute "component," "service," "API," or "boundary." Consistent language is the whole point.

**Module**: anything with an interface and an implementation. Deliberately scale-agnostic: a function, class, package, or tier-spanning slice. _Avoid_: unit, component, service.

**Interface**: everything a caller must know to use the module correctly: the type signature, but also invariants, ordering constraints, error modes, required configuration, and performance characteristics. _Avoid_: API, signature (too narrow, they refer only to the type-level surface).
…

Read the whole file at its exact version.

How to install

Latest version

mdr add kunolu/640-skills/codebase-design@git:20260827.561ec6a

Exact content

mdr add kunolu/640-skills/codebase-design@sha256:2c20617f87ec8af6

Pin 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.

Badge

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

0 badge views in 30 days

Versions

version	committed	commit	size	audit
git:20260827.561ec6a latest	2026-08-27	561ec6a	6,446 B	A	view · diff
git:20260718.951ea5b	2026-07-18	951ea5b	6,488 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Deterministic, no model, 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 (6446 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

kunolu/640-skills · 113 stars · license Apache-2.0 · pushed 2026-09-25 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_rezrrlcjdoonytmn
GET https://markdownregistry.com/api/v1/resolve?ref=kunolu/640-skills/codebase-design
GET https://markdownregistry.com/api/v1/blob/2c20617f87ec8af6a434859f381b2f061a69b530444e74eb39e78bb016a6d1e2

Your agent 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.

More from kunolu/640-skills

sbtd-workflow-onboard skill

kunolu/640-skills · sbtd-workflow-onboard/SKILL.md · Checks, installs, or resets SBTD workflow tools, global Skills, AGENTS templates, and project configuration; explicitly…

git:20260921.563abb9 · audit A · 113 stars

diagnosing-bugs skill

kunolu/640-skills · sbtd-workflow-onboard/assets/external-skills/stable/skills/diagnosing-bugs/SKILL.md · Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports…