test-data SKILL.md skillA
test-data from datawithbaraa/claude-code-data-engineering-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add datawithbaraa/claude-code-data-engineering-skills/test-data@git:20261029.2e2b6c2Pins git:20261029.2e2b6c2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- datawithbaraa/claude-code-data-engineering-skills
- Path
skills/test-data/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261029.2e2b6c2, committed Oct 29, 2026
- Size
- 1,326 bytes
- Repository stars
- 81
- License
- MIT
Use when a new function or a new table needs tests, to write test data with the edge cases and the expected result written first, never from production data.
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
# Test data The job: small test files with the edge cases, and the expected result decided first. Input: the function or the table under test. ## Steps 1. Name the function or the table under test, and what it must do with each edge case. 2. Synthetic rows from the metadata, in the source's own format. Never real data. 3. The expected result first: what the output must hold, written before the code. 4. Injected faults, each with its expected result: a broken line, a new column, broken bytes, a child row before its parent. 5. A second delivery with drift: a renamed column that the schema check must stop. 6. The fixtures beside the tests, never in the data folders. 7. Run the tests and report which passed. ## Output The test files beside the tests: the input rows, the injected faults, the expected result written first, and the test that compares them. ## Reads - the metadata of the table, the file parsers of the source's format ## Writes - the fixtures of the test, and the test ## Never - Never reads production data for a test. - Never writes under the data folders.
Read the whole file at its exact version.
How to install
mdr add datawithbaraa/claude-code-data-engineering-skills/test-data@sha256:337d136d6e9fc561The line at the top of this page pins the label git:20261029.2e2b6c2, 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_xn24srawywyjcfid)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 29, 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 (1326 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
datawithbaraa/claude-code-data-engineering-skills · 81 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xn24srawywyjcfid GET https://markdownregistry.com/api/v1/resolve?ref=datawithbaraa/claude-code-data-engineering-skills/test-data GET https://markdownregistry.com/api/v1/blob/337d136d6e9fc56101315f4b741708c8e2723c7e7127bb6e71aba10e5801442c
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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