common-tdd SKILL.md skillA
common-tdd from hoangnguyen0403/agent-skills-standard is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hoangnguyen0403/agent-skills-standard/common-tdd@git:20260817.b5ee321Pins git:20260817.b5ee321 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hoangnguyen0403/agent-skills-standard
- Path
.codex/skills/common/common-tdd/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260817.b5ee321, committed Aug 17, 2026
- First version recorded
- May 13, 2026
- Size
- 3,649 bytes
- Repository stars
- 583
- License
- MIT
Guides quality-first TDD for new behavior, bug fixes, and test changes. Selects the smallest test layer, proves a distinct regression risk, and runs bounded RED-GREEN-REFACTOR verification.
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
# Quality-First TDD ## **Priority: P0 (CRITICAL)** A passing test is insufficient; the test must prove an owned behavior and a distinct plausible fault. ## Choose the mode - **New behavior:** strict RED -> GREEN -> REFACTOR. Do not write production code before the expected RED. - **Legacy or bug fix:** characterize only when needed, then reproduce the intended change as a failing regression (RED). Preserve unrelated existing code; do not delete it merely because it predates the test. ## Before writing a test Create one Test Intent Record per behavior/risk: - `contract`: observable contract — an application-owned result or side effect - `fault`: distinct fault — a distinct plausible regression this test would catch - `layer`: smallest honest unit, component, contract, integration, or E2E layer - `cases`: minimal distinct equivalence classes; use a parameterized test for equivalent inputs - `command`: exact focused single-run command Reject tests that duplicate an existing fault, assert implementation detail or mock choreography, depend on time/network/order, or force a broader behavior into a unit. ## Bounded loop …
Read the whole file at its exact version.
How to install
mdr add hoangnguyen0403/agent-skills-standard/common-tdd@sha256:e46965cdbbd90046The line at the top of this page pins the label git:20260817.b5ee321, 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_r3m6z3otydqpejgl)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between May 13, 2026 and Aug 17, 2026, about one every 24 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260817.b5ee321 latest | 2026-08-17 | b5ee321 | 3,649 B | A | view · diff |
| git:20260714.6bf9b5e | 2026-07-14 | 6bf9b5e | 3,454 B | A | view · diff |
| git:20260615.50729d2 | 2026-06-15 | 50729d2 | 3,333 B | A | view · diff |
| git:20260610.774e8d6 | 2026-06-10 | 774e8d6 | 2,793 B | A | view · diff |
| git:20260513.7eab4bf | 2026-05-13 | 7eab4bf | 2,643 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 (3649 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
hoangnguyen0403/agent-skills-standard · 583 stars · license MIT · pushed 2026-11-07 · branch develop
API
GET https://markdownregistry.com/api/v1/artifacts/art_r3m6z3otydqpejgl GET https://markdownregistry.com/api/v1/resolve?ref=hoangnguyen0403/agent-skills-standard/common-tdd GET https://markdownregistry.com/api/v1/blob/e46965cdbbd900462ad670d0723624fe4d111da9dfd1ba20b64f889f5955f36f
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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