howto-develop-with-postgres

howto-develop-with-postgres is a skill for Claude Code from ed3dai/ed3d-plugins. It costs 58 tokens per session (1,595 once invoked), scanned A, original, no licence file.

A guide to writing database code for PostgreSQL, an open-source relational database, including schemas and transactions, which group database changes into an all-or-nothing operation.

In plain words
What is it for?
Use it when accessing PostgreSQL, designing schemas, or managing transactions, especially with UUID and JSONB values.
Why use it?
It helps avoid partial updates, data corruption, naming mismatches, and type errors when working with database records.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Part of the ed3d-house-style plugin — 10 skills shipped together

Good fit Use it when accessing PostgreSQL, designing schemas, or managing transactions, especially with UUID and JSONB values.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ed3dai/ed3d-plugins/howto-develop-with-postgres
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add ed3dai/ed3d-plugins --skill howto-develop-with-postgres
Clone the repo
git clone --depth 1 https://github.com/ed3dai/ed3d-plugins

Made for: Claude Code.

Or install ed3d-house-style, the plugin that ships this one along with the rest of its 10 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for howto-develop-with-postgres

README.md
[![agentmods](https://agentmods.dev/badge/skills/ed3dai/ed3d-plugins/howto-develop-with-postgres/github.svg)](https://agentmods.dev/skills/ed3dai/ed3d-plugins/howto-develop-with-postgres)
Your own site
<a href="https://agentmods.dev/skills/ed3dai/ed3d-plugins/howto-develop-with-postgres"><img src="https://agentmods.dev/badge/skills/ed3dai/ed3d-plugins/howto-develop-with-postgres/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for howto-develop-with-postgres

Your own site · 80×15
<a href="https://agentmods.dev/skills/ed3dai/ed3d-plugins/howto-develop-with-postgres"><img src="https://agentmods.dev/badge/skills/ed3dai/ed3d-plugins/howto-develop-with-postgres.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,595 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00058 $0.01595
Opus 5.5 $0.00023 $0.00638
Sonnet 5.5 $0.00012 $0.00319
Haiku 4.5 $0.00006 $0.00160

Measured 1mo ago against content hash a194c1048e72, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

howto-develop-with-postgres scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/ed3d-house-style/skills/howto-develop-with-postgres/SKILL.md · 190 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 190 lines · 58 tokens per session scan A a194c1048e72

Subscribe to this mod's changes

howto-develop-with-postgres is a skill published in the GitHub repository ed3dai/ed3d-plugins (253 stars, last pushed 1mo ago), with no licence file. It adds 58 tokens to every session and 1,595 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other skills, from other repositories

backend-architect

Use when implementing server-side logic, designing middleware, integrating databases, or building API endpoints — with TDD and verification discipline.

k1lgor/virtual-company · 28 tokens

alloydb-basics

Manages clusters, instances, and backups for AlloyDB for PostgreSQL, and integrates with AlloyDB Model Context Protocol (MCP) tools for automated database operations. Use when creating, configuring, or administering AlloyDB databases. Do NOT use for general PostgreSQL instances (e.g. Cloud SQL) or other GCP databases.

google/skills · 72 tokens

cloud-sql-basics

This file generates or explains Cloud SQL resources. Use this file when the user asks to create a Cloud SQL instance or database for MySQL, PostgreSQL, or SQL Server. Cloud SQL manages third-party MySQL, PostgreSQL, and SQL Server instances as resources in Cloud SQL. For example, when Cloud SQL creates an open-source…

google/skills · 108 tokens

supabase

Use when doing ANY task involving Supabase. Triggers: Supabase products (Database, Auth, Edge Functions, Realtime, Storage, Vectors, Cron, Queues); client libraries and SSR integrations (supabase-js, @supabase/ssr) in Next.js, React, SvelteKit, Astro, Remix; auth issues (login, logout, sessions, JWT, cookies…

supabase/agent-skills · 185 tokens

supabase-postgres-best-practices

Postgres best practices maintained by Supabase, for Postgres running anywhere. Load this skill BEFORE writing or changing anything that lives in a Postgres database: creating or altering tables and columns (including choosing column types), schema design, migrations and declarative schema files, RLS policies and the…

supabase/agent-skills · 182 tokens

ecto-patterns

Use when a task touches Ecto, even a how-to question: schemas, changesets, validations, queries, preloads, Multi, migrations, constraints, money fields. Load it before writing Ecto code. Skip for Ash.

oliver-kriska/claude-elixir-phoenix · 51 tokens