databases SKILL.md skillA
databases from wewpellex21/code-sensei is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add wewpellex21/code-sensei/databases@git:20260207.d76e1caPins git:20260207.d76e1ca in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- wewpellex21/code-sensei
- Path
skills/databases/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260207.d76e1ca, committed Feb 7, 2026
- Size
- 2,888 bytes
- Repository stars
- 3
- License
- MIT
SQL, databases, ORMs, and data modeling. Activated when Claude works with database code, .sql files, Prisma schemas, or database-related npm packages.
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
# Databases — CodeSensei Teaching Module
## What is a Database?
- **Analogy:** A super-powered spreadsheet that your app can read and write to automatically. Each "table" is like a sheet, each "row" is an entry, each "column" is a field.
- **Key insight:** Without a database, your app forgets everything when it restarts. Databases make data PERMANENT.
## SQL (Structured Query Language)
- **Analogy:** SQL is the language you use to talk to the database. Like asking a librarian: "Find me all books by this author, sorted by year."
- **Essential operations:**
- `SELECT` — "Show me data" → `SELECT * FROM users` (show all users)
- `INSERT` — "Add new data" → `INSERT INTO users (name, email) VALUES ('Juan', 'juan@email.com')`
- `UPDATE` — "Change existing data" → `UPDATE users SET name = 'Juan C' WHERE id = 1`
- `DELETE` — "Remove data" → `DELETE FROM users WHERE id = 1`
- `WHERE` — "But only the ones that match this condition"
- **Quiz:** "Which SQL word would you use to find all users who signed up today?"
## Types of Databases
- **PostgreSQL** — the reliable all-rounder. Most vibecoded apps use this. Think of it as Excel but 1000x more powerful.
…Read the whole file at its exact version.
How to install
mdr add wewpellex21/code-sensei/databases@sha256:39fa5dbec91f82cfThe line at the top of this page pins the label git:20260207.d76e1ca, 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_djp6ei6llkbyqusn)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Feb 7, 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 (2888 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
wewpellex21/code-sensei · 3 stars · license MIT · pushed 2026-10-13 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_djp6ei6llkbyqusn GET https://markdownregistry.com/api/v1/resolve?ref=wewpellex21/code-sensei/databases GET https://markdownregistry.com/api/v1/blob/39fa5dbec91f82cf3e9615db132fc66ca48bb5472cc8ec17a40d21a68c18e291
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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