sql-best-practices

sql-best-practices is a skill for Claude Code, Codex from aiming-lab/MetaClaw. It costs 42 tokens per session (209 once invoked), scanned A, original, MIT.

A set of guidelines for writing SQL, the language used to read and change data in databases. It covers query structure, safety, naming, and checking performance.

In plain words
What is it for?
Use it when writing selections, joins, summaries, window functions, or database structure changes, especially when queries may run against production data.
Why use it?
It helps prevent unsafe database changes, confusing queries, and slow data retrieval. It also discourages exposing all columns or inserting user input directly into SQL.

Skill for Claude CodeCodex

About the project

MetaClaw is an AI-agent system that learns from conversations and evolves its behavior over time. It provides memory and learning modes for users who want an agent that adapts across interactions, with support for multiple claw-based agent projects.

aiming-lab/MetaClaw · 3,496 stars · on GitHub

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.

agentmods
npx agentmods add skills/aiming-lab/metaclaw/sql-best-practices
Any agent
npx skills add aiming-lab/MetaClaw --skill sql-best-practices
Clone the repo
git clone --depth 1 https://github.com/aiming-lab/MetaClaw

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 sql-best-practices

README.md
[![agentmods](https://agentmods.dev/badge/skills/aiming-lab/metaclaw/sql-best-practices.svg)](https://agentmods.dev/skills/aiming-lab/metaclaw/sql-best-practices)
Your own site
<a href="https://agentmods.dev/skills/aiming-lab/metaclaw/sql-best-practices"><img src="https://agentmods.dev/badge/skills/aiming-lab/metaclaw/sql-best-practices.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 209 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00042 $0.00209
Opus 5 $0.00021 $0.00105
Sonnet 5 $0.00008 $0.00042
Haiku 4.5 $0.00004 $0.00021

Measured 5d ago against content hash bb6818b4af16, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

sql-best-practices 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 5d 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.

memory_data/skills/sql-best-practices/SKILL.md · 21 lines

What it actually says

SQL Best Practices

Query quality:

  • Use SELECT col1, col2 — never SELECT * in production code.
  • Use CTEs (WITH) for readability instead of deeply nested subqueries.
  • Filter early: apply WHERE before JOIN when possible to reduce data scanned.
  • Use EXPLAIN / EXPLAIN ANALYZE to inspect query plans for slow queries.

Safety:

  • Always use parameterized queries from application code — never string interpolation.
  • Wrap destructive operations (DELETE, UPDATE, DROP) in a transaction.
  • Test on a staging/dev environment before running on production.

Naming: snake_case for tables/columns, descriptive names, consistent pluralization.

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. 5d ago First seen · 21 lines · 42 tokens per session scan A bb6818b4af16

Subscribe to this mod's changes

sql-best-practices is a skill published in the GitHub repository aiming-lab/MetaClaw (3,496 stars, last pushed 2mo ago), licensed MIT. It adds 42 tokens to every session and 209 once invoked, about $0.0002 per session on Opus 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.

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