level85: Skill for Claude Code

.agents/skills/x-database-patterns/SKILL.md

x-database-patterns is a skill for Claude Code, Codex from pure-golang/level85. It costs 57 tokens per session (1,621 once invoked), scanned A, original, no licence file.

A design guide for PostgreSQL database access in services and adapters. It covers choices such as pgx versus sqlx, repository structure, shared database interfaces, transactions, named queries, and constraint-error handling.

In plain words
What is it for?
Use it when designing PostgreSQL repositories, database adapters, transactions, named queries, or handling database constraint errors.
Why use it?
It helps keep database code organised and makes common decisions about queries, transactions, and errors consistent across a service.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

This is pure-golang/level85's own configuration. It tells Claude Code and Codex how to work on level85 itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything level85 configures →

Reuse

Borrowing it

Nothing to install: this file belongs to pure-golang/level85. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/pure-golang/level85/main/.agents/skills/x-database-patterns/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/pure-golang/level85

Made for: Claude Code, Codex.

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 x-database-patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/pure-golang/level85/x-database-patterns/github.svg)](https://agentmods.dev/skills/pure-golang/level85/x-database-patterns)
Your own site
<a href="https://agentmods.dev/skills/pure-golang/level85/x-database-patterns"><img src="https://agentmods.dev/badge/skills/pure-golang/level85/x-database-patterns/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 x-database-patterns

Your own site · 80×15
<a href="https://agentmods.dev/skills/pure-golang/level85/x-database-patterns"><img src="https://agentmods.dev/badge/skills/pure-golang/level85/x-database-patterns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,621 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 $0.00057 $0.01621
Opus 5.5 $0.00023 $0.00648
Sonnet 5.5 $0.00011 $0.00324
Haiku 4.5 $0.00006 $0.00162

Measured 2mo ago against content hash a6cc9457e2f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

x-database-patterns 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 2mo 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.

.agents/skills/x-database-patterns/SKILL.md · 211 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

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. 2mo ago First seen · 211 lines · 57 tokens per session scan A a6cc9457e2f0

Subscribe to this mod's changes

x-database-patterns is a skill published in the GitHub repository pure-golang/level85 (2 stars, last pushed 5mo ago), with no licence file. It adds 57 tokens to every session and 1,621 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 2026-08-31.

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