testable-design SKILL.md skillA
testable-design from pantheon-org/tekhne is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add pantheon-org/tekhne/testable-design@git:20261002.e6369eePins git:20261002.e6369ee in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- pantheon-org/tekhne
- Path
skills/software-engineering/design-principles/testable-design/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261002.e6369ee, committed Oct 2, 2026
- First version recorded
- Mar 4, 2026
- Size
- 10,201 bytes
- Repository stars
- 10
- License
- MIT
Design code for testability using boundary isolation, dependency injection, and testable architecture patterns. Use when designing test strategies, writing unit tests, improving test coverage, refactoring untestable or hard-to-test code, working with mocking or test doubles, or applying TDD practices.
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
# Testable Design Architecture and design patterns for testable code, focusing on boundary isolation and dependency injection. ## Philosophy - Treat difficulty in testing as feedback about the design, not as a testing problem. - Fix coupling rather than compromising the architecture to make a test pass. - Test behaviour at architectural boundaries, not the internals behind them. - Prefer small, fast unit tests over pure logic, and a few integration tests at each adapter. ## When to Use - Designing test strategies for new features - Refactoring untestable code with hard dependencies - Improving test coverage by isolating layers - Evaluating whether code is testable before implementation - Designing boundaries that enable fast unit tests - Reviewing a test suite that relies on static mocking, real databases or skipped tests ## When Not to Use - Class-level SOLID violations (use solid-principles) - Architectural boundary decisions (use clean-architecture) - Choosing structural patterns (use design-patterns) - Writing a test-first workflow from scratch (use test-driven-development) ## Testable Design Principles ### Tests Are Architecture …
Read the whole file at its exact version.
How to install
mdr add pantheon-org/tekhne/testable-design@sha256:28f86d2905feb444The line at the top of this page pins the label git:20261002.e6369ee, 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_zhx3tvoz4erz4kkb)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Mar 4, 2026 and Oct 2, 2026, about one every 106 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261002.e6369ee latest | 2026-10-02 | e6369ee | 10,201 B | A | view · diff |
| git:20260316.2d4c8cf | 2026-03-16 | 2d4c8cf | 7,407 B | A | view · diff |
| git:20260304.5d73d82 | 2026-03-04 | 5d73d82 | 7,428 B | A | view |
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 (10201 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
pantheon-org/tekhne · 10 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_zhx3tvoz4erz4kkb GET https://markdownregistry.com/api/v1/resolve?ref=pantheon-org/tekhne/testable-design GET https://markdownregistry.com/api/v1/blob/28f86d2905feb44461a56d448a398f21e2d4077faae106ecd725fe40bd09b03c
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.