postgres-patterns SKILL.md skillA
postgres-patterns from skateddu/claude-code-python-setup is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add skateddu/claude-code-python-setup/postgres-patterns@git:20261015.4096849Pins git:20261015.4096849 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- skateddu/claude-code-python-setup
- Path
.claude/skills/postgres-patterns/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261015.4096849, committed Oct 15, 2026
- First version recorded
- Mar 20, 2026
- Size
- 3,888 bytes
- Repository stars
- 28
- License
- MIT
PostgreSQL database patterns for query optimization, schema design, indexing, and security. Based on Supabase best practices. Use when designing PostgreSQL schemas, indexes, or RLS policies, or when a query is too slow.
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
# PostgreSQL Patterns
Quick reference for PostgreSQL best practices. For detailed guidance, use the `database-reviewer` agent.
## When to Activate
- Writing SQL queries or migrations
- Designing database schemas
- Troubleshooting slow queries
- Implementing Row Level Security
- Setting up connection pooling
## Quick Reference
### Index Cheat Sheet
| Query Pattern | Index Type | Example |
|--------------|------------|---------|
| `WHERE col = value` | B-tree (default) | `CREATE INDEX idx ON t (col)` |
| `WHERE col > value` | B-tree | `CREATE INDEX idx ON t (col)` |
| `WHERE a = x AND b > y` | Composite | `CREATE INDEX idx ON t (a, b)` |
| `WHERE jsonb @> '{}'` | GIN | `CREATE INDEX idx ON t USING gin (col)` |
| `WHERE tsv @@ query` | GIN | `CREATE INDEX idx ON t USING gin (col)` |
| Time-series ranges | BRIN | `CREATE INDEX idx ON t USING brin (col)` |
### Data Type Quick Reference
| Use Case | Correct Type | Avoid |
|----------|-------------|-------|
| IDs | `bigint` | `int`, random UUID |
| Strings | `text` | `varchar(255)` |
| Timestamps | `timestamptz` | `timestamp` |
| Money | `numeric(10,2)` | `float` |
| Flags | `boolean` | `varchar`, `int` |
### Common Patterns
…Read the whole file at its exact version.
How to install
mdr add skateddu/claude-code-python-setup/postgres-patterns@sha256:e633f8dfbb141971The line at the top of this page pins the label git:20261015.4096849, 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_24zy6jiz62yopwyl)
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Versions
The registry has recorded 2 versions of this file, between Mar 20, 2026 and Oct 15, 2026, about one every 209 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261015.4096849 latest | 2026-10-15 | 4096849 | 3,888 B | A | view · diff |
| git:20260320.cd1dca0 | 2026-03-20 | cd1dca0 | 3,786 B | A | view |
Audit of the latest version
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Source
skateddu/claude-code-python-setup · 28 stars · license MIT · pushed 2026-10-15 · branch main
API
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