define-variables SKILL.md skillA
define-variables from aperivue/medsci-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add aperivue/medsci-skills/define-variables@git:20261004.5b44a65Pins git:20261004.5b44a65 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- aperivue/medsci-skills
- Path
skills/define-variables/SKILL.md- Versions recorded
- 8
- Latest version
- git:20261004.5b44a65, committed Oct 4, 2026
- First version recorded
- Apr 24, 2026
- Size
- 7,577 bytes
- Repository stars
- 366
- License
- MIT
Use when exposure, outcome, covariate or eligibility definitions and cutoffs need a citable basis before the protocol. Reads the data dictionary first, then maps each variable to a guideline or published definition and the database columns in a citation-backed table.
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
# Define-Variables Skill Map each exposure, outcome, covariate, and eligibility variable to a canonical guideline/consensus definition, cross-check it against prior operationalizations in comparable cohorts, then map it to the available DB variables. Call after `/design-study` (and `/search-lit`), before `/write-protocol`. ## Inputs 1. **Research question** (one sentence) 2. **Candidate variables** — exposure, outcome, key covariates, eligibility filters 3. **Data dictionary path** (xlsx / csv / markdown) OR explicit list of available DB columns 4. **Cohort type** (e.g., health-screening, NHANES-like, claims, registry) — informs which prior-art cohort to compare against Missing inputs → ask once, then proceed. ## 4-Tier Pipeline (DB codebook + token-efficient literature) ### Tier 0 — DB codebook lookup (mandatory for DB-backed observational studies) **Trigger**: project has a `project.yaml::db.dictionary_path` field pointing to a machine-readable codebook (xlsx/csv/markdown), OR the user supplied a dictionary path in inputs. If neither, skip to Tier 1. …
Read the whole file at its exact version.
How to install
mdr add aperivue/medsci-skills/define-variables@sha256:9bf85903bf29437fThe line at the top of this page pins the label git:20261004.5b44a65, 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_ucvomerya2g5cqhl)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 8 versions of this file, between Apr 24, 2026 and Oct 4, 2026, about one every 23 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261004.5b44a65 latest | 2026-10-04 | 5b44a65 | 7,577 B | A | view · diff |
| git:20260930.c8ed96c | 2026-09-30 | c8ed96c | 7,486 B | A | view · diff |
| git:20260930.30387c2 | 2026-09-30 | 30387c2 | 7,501 B | A | view · diff |
| git:20260930.913abeb | 2026-09-30 | 913abeb | 7,626 B | A | view · diff |
| git:20260728.214054b | 2026-07-28 | 214054b | 11,291 B | A | view · diff |
| git:20260606.f5f5f19 | 2026-06-06 | f5f5f19 | 10,800 B | A | view · diff |
| git:20260426.3f07d7e | 2026-04-26 | 3f07d7e | 9,901 B | A | view · diff |
| git:20260424.b7c4aec | 2026-04-24 | b7c4aec | 7,406 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 (7577 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
aperivue/medsci-skills · 366 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ucvomerya2g5cqhl GET https://markdownregistry.com/api/v1/resolve?ref=aperivue/medsci-skills/define-variables GET https://markdownregistry.com/api/v1/blob/9bf85903bf29437f41bdaaafbf46ee789262d5bf6d15989cfb3ebb9db5f62219
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.