database-postgresql SKILL.md skillA
database-postgresql from d-padmanabhan/agent-engineering-handbook is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add d-padmanabhan/agent-engineering-handbook/database-postgresql@git:20260207.963c258Pins git:20260207.963c258 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- d-padmanabhan/agent-engineering-handbook
- Path
skills/database-postgresql/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260207.963c258, committed Feb 7, 2026
- Size
- 4,693 bytes
- Repository stars
- 20
- License
- MIT
PostgreSQL database design patterns, naming conventions, schema design, migrations, performance optimization, and security best practices. Use when designing database schemas, writing migrations, optimizing queries, or working with PostgreSQL-specific features like JSONB, full-text search, or RLS.
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 Database Engineering ## Core Principles - **"Consistency is king"** - Follow naming conventions consistently across all tables and columns - **"Explicit over implicit"** - Use explicit constraints, types, and defaults - **"Performance by design"** - Index foreign keys and frequently queried columns - **"Security by default"** - Use parameterized queries, RLS, least privilege - **"Migrations are code"** - Version control migrations, make them reversible - **"Documentation matters"** - Comments explain why, not just what - **"Test your migrations"** - Test migrations in staging before production - **"Backup before changes"** - Always backup before destructive operations ## Quick Reference ### Naming Conventions - **Tables:** Plural snake_case (`users`, `order_items`) - **Columns:** Singular snake_case (`first_name`, `email`) - **Primary Keys:** Always named `id` (BIGSERIAL) - **Foreign Keys:** `table_name_id` pattern (`user_id`, `product_id`) - **Indexes:** `idx_table_column` pattern (`idx_users_email`) - **Constraints:** Named with descriptive pattern (`users_email_unique`) ### Essential Patterns **Timestamps:** ```sql …
Read the whole file at its exact version.
How to install
mdr add d-padmanabhan/agent-engineering-handbook/database-postgresql@sha256:bb0749e31aaacf79The line at the top of this page pins the label git:20260207.963c258, 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_fypo2n72udpaajul)
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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 (4693 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
d-padmanabhan/agent-engineering-handbook · 20 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fypo2n72udpaajul GET https://markdownregistry.com/api/v1/resolve?ref=d-padmanabhan/agent-engineering-handbook/database-postgresql GET https://markdownregistry.com/api/v1/blob/bb0749e31aaacf794e5a436fbfc07e41f6bba2a2316e7f9d4f3addd62d6aba7c
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.