database-optimization skillA
database-optimization is agent-read markdown (skill) from komluk/scaffolding: Schema design, index strategy, migration safety, and query analysis. TRIGGER when: designing tables or indexes, writing a migration, or diagnosing a slow query. SKIP: writing ORM model code (use python-patterns); generic backend patterns (use python-patterns)..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
## Schema Design Principles | Form | Use When | |------|----------| | 1NF | Always (atomic values) | | 2NF | Most tables | | 3NF | Transactional data | | Denormalized | Read-heavy, reporting | ## Index Strategy | Type | Use Case | |------|----------| | B-Tree | Default, range queries | | Hash | Exact match only | | GIN (Postgres) | Full-text, JSONB, arrays | | Partial | Subset of rows | | Composite | Multi-column queries | > Index type names vary by engine (e.g. GIN/GiST/BRIN are Postgres-specific; > MySQL/SQLite expose a different set). Treat engine-specific rows as examples. ### When to Index - Primary keys (automatic) - Foreign keys - WHERE clause columns - ORDER BY columns - JOIN columns ### When NOT to Index - Low cardinality columns - Frequently updated columns - Small tables (< 1000 rows) ## Migration Safety ### Safe Operations - ADD COLUMN (nullable) - ADD INDEX CONCURRENTLY - CREATE TABLE - ADD CONSTRAINT (with validation) ### Dangerous Operations - DROP COLUMN - RENAME COLUMN - ALTER COLUMN TYPE - DROP TABLE ### Migration Checklist - [ ] Tested on production-like data - [ ] Rollback script ready - [ ] Estimated execution time - [ ] Lock impact assessed …
Read the whole file at its exact version.
How to install
mdr add komluk/scaffolding/database-optimization@git:20260614.9d809afmdr add komluk/scaffolding/database-optimization@sha256:378e0f2d8a769488Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_2eepmjlsnmxv5cuu)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260614.9d809af latest | 2026-06-14 | 9d809af | 6,880 B | A | view · diff |
| git:20260520.3aa374b | 2026-05-20 | 3aa374b | 6,416 B | A | view · diff |
| git:20260409.25dc3ca | 2026-04-09 | 25dc3ca | 6,234 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 (6880 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
komluk/scaffolding · 15 stars · license MIT · pushed 2026-09-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2eepmjlsnmxv5cuu GET https://markdownregistry.com/api/v1/resolve?ref=komluk/scaffolding/database-optimization GET https://markdownregistry.com/api/v1/blob/378e0f2d8a769488560e731d21a2a81a570915efa50131af098b04eef5b1f03f
Your agent 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.