database-optimization SKILL.md skillA
database-optimization from komluk/scaffolding is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add komluk/scaffolding/database-optimization@git:20260614.9d809afPins git:20260614.9d809af in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- komluk/scaffolding
- Path
skills/database-optimization/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260614.9d809af, committed Jun 14, 2026
- First version recorded
- Apr 9, 2026
- Size
- 6,880 bytes
- Repository stars
- 16
- License
- MIT
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).
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
## 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@sha256:378e0f2d8a769488The line at the top of this page pins the label git:20260614.9d809af, 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_2eepmjlsnmxv5cuu)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Apr 9, 2026 and Jun 14, 2026, about one every 33 days.
| 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 · 16 stars · license MIT · pushed 2026-11-08 · 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 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.