postgresql-table-design SKILL.md skillA
postgresql-table-design from wshobson/agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add wshobson/agents/postgresql-table-design@git:20260901.c80732dPins git:20260901.c80732d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- wshobson/agents
- Path
plugins/database-design/skills/postgresql-table-design/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260901.c80732d, committed Sep 1, 2026
- Size
- 7,912 bytes
- Repository stars
- 41,220
- License
- MIT
Use this skill when designing or reviewing a PostgreSQL-specific schema. Covers best-practices, data types, indexing, constraints, performance patterns, and advanced features.
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 Table Design ## When to Use - Designing a new PostgreSQL schema, or reviewing one before it ships. - Choosing column types, keys, constraints, or indexes for PostgreSQL specifically. - Deciding whether and how to partition a large table, or how to store semi-structured data. - Planning a schema change on a live database without downtime. The rules and decision points for a PostgreSQL schema. The full data-type catalog, workload patterns (update-heavy, insert-heavy, upsert, schema evolution), extensions, JSONB indexing, and worked DDL examples are in `references/details.md`; open it when a section below points there. ## Core Rules - Define a **PRIMARY KEY** for reference tables (users, orders, etc.). Not always needed for time-series/event/log data. When used, prefer `BIGINT GENERATED ALWAYS AS IDENTITY`; use `UUID` only when global uniqueness/opacity is needed. - **Normalize first (to 3NF)** to eliminate data redundancy and update anomalies; denormalize **only** for measured, high-ROI reads where join performance is proven problematic. - Add **NOT NULL** everywhere it is semantically required; use **DEFAULT**s for common values. …
Read the whole file at its exact version.
How to install
mdr add wshobson/agents/postgresql-table-design@sha256:1e27b0fac6d88a71The line at the top of this page pins the label git:20260901.c80732d, 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_ljz7dmawibnteide)
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Versions
The registry has recorded 1 version of this file, committed on Sep 1, 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 (7912 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
wshobson/agents · 41,220 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ljz7dmawibnteide GET https://markdownregistry.com/api/v1/resolve?ref=wshobson/agents/postgresql-table-design GET https://markdownregistry.com/api/v1/blob/1e27b0fac6d88a710cd925b831608ca202c40ade4f4e285a8e027dcf2f9a44ea
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.