prompt-regression-testing SKILL.md skillA
prompt-regression-testing from mehranqadirian/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mehranqadirian/skills/prompt-regression-testing@git:20261101.e2eb6f8Pins git:20261101.e2eb6f8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mehranqadirian/skills
- Path
agent-engineering/prompt-regression-testing/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261101.e2eb6f8, committed Nov 1, 2026
- Size
- 3,885 bytes
- Repository stars
- 13
- License
- none declared
Builds and runs regression tests for prompts, skills and agents so changes can be checked instead of guessed. Use whenever the user changes a prompt or SKILL.md and wants to know if it got better or worse, asks how to test or evaluate an LLM feature, wants a frozen test set, pass rates over repeated runs, a baseline comparison or CI checks for prompts, even if they only say "did my edit break anything". Model agnostic, deterministic checks, flags regressions.
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
# prompt-regression-testing
A change to a prompt, skill or agent can fix one case and silently break three. Freeze a small set of realistic cases, check them with deterministic rules, and compare every change to a saved baseline.
```
prompt-regression-testing/
├── SKILL.md
├── scripts/
│ └── run_cases.py run cases via a command or recorded answers; checks, repeats, baseline diff
├── references/
│ └── case-design.md coverage map, check types, non-determinism, subjective quality, CI
└── templates/
└── cases.json example suite with typical, format, safety and negative cases
```
## When to use
- Editing a prompt, SKILL.md or agent and needing proof it did not get worse
- Choosing between two prompt versions
- Setting up checks before shipping an LLM feature
- A bug was fixed and must never return
## Workflow
1. **Collect cases** from real requests. Cover typical, edge, format, safety, and at least one negative case that should not trigger the behavior (`references/case-design.md`). Start with about 20.
2. **Write checks** per case in `cases.json` (copy `templates/cases.json`). Prefer several loose checks over one strict check.
…Read the whole file at its exact version.
How to install
mdr add mehranqadirian/skills/prompt-regression-testing@sha256:a7fa250e75028b41The line at the top of this page pins the label git:20261101.e2eb6f8, 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_kfhkrlbuogkxaa7s)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Nov 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 (3885 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
mehranqadirian/skills · 13 stars · license none declared · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_kfhkrlbuogkxaa7s GET https://markdownregistry.com/api/v1/resolve?ref=mehranqadirian/skills/prompt-regression-testing GET https://markdownregistry.com/api/v1/blob/a7fa250e75028b41edf7898481450f85c05be9e2679e8912e73d3e387d922226
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.