sql_mastery

sql_mastery is a skill for Claude Code, Codex from MidOSresearch/midos. It costs 0 tokens per session (129 once invoked), scanned A, original, MIT.

A collection of PostgreSQL guidance for writing stored procedures that refresh daily attribution data. PostgreSQL is a database system, and a stored procedure is saved database code that performs a sequence of operations.

In plain words
What is it for?
Creating PostgreSQL refresh procedures, staging daily traffic, loading attribution events, and building repeatable data-processing jobs.
Why use it?
It shows a repeatable way to clear staging data, load new traffic records, and update attribution results while reducing duplicate data.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Creating PostgreSQL refresh procedures, staging daily traffic, loading attribution events, and building repeatable data-processing jobs.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/midosresearch/midos/sql_mastery
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 MidOSresearch/midos --skill sql_mastery
Clone the repo
git clone --depth 1 https://github.com/MidOSresearch/midos

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_mastery

README.md
[![agentmods](https://agentmods.dev/badge/skills/midosresearch/midos/sql_mastery/github.svg)](https://agentmods.dev/skills/midosresearch/midos/sql_mastery)
Your own site
<a href="https://agentmods.dev/skills/midosresearch/midos/sql_mastery"><img src="https://agentmods.dev/badge/skills/midosresearch/midos/sql_mastery/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 sql_mastery

Your own site · 80×15
<a href="https://agentmods.dev/skills/midosresearch/midos/sql_mastery"><img src="https://agentmods.dev/badge/skills/midosresearch/midos/sql_mastery.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 129 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 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 5.1 $0.00000 $0.00129
Opus 5.5 $0.00000 $0.00052
Sonnet 5.5 $0.00000 $0.00026
Haiku 4.5 $0.00000 $0.00013

Measured 1mo ago against content hash b31a2469ed3c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sql_mastery 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.

knowledge/skills/sql_mastery/SKILL.md · 18 lines

What it actually says

🐘 PostgreSQL Mastery: Stored Procedures & Attribution

1. The "Gold Standard" Stored Procedure Structure

CREATE OR REPLACE PROCEDURE sp_refresh_attribution_daily()
LANGUAGE plpgsql
AS $$
BEGIN
    -- 1. Truncate Staging
    TRUNCATE TABLE stg_daily_traffic;

    -- 2. Ingest New Data (Idempotent)
    INSERT INTO fact_attribution (user_id, source, medium, timestamp)
    SELECT

> **Note**: Full content available to MidOS PRO subscribers. See https://midos.dev/pricing
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 · 18 lines · 0 tokens per session scan A b31a2469ed3c

Subscribe to this mod's changes

sql_mastery is a skill published in the GitHub repository MidOSresearch/midos (8 stars, last pushed 5mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 129 tokens. 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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