What is database-lord?

A guide to designing, tuning, and operating relational, document, key-value, and analytical databases such as PostgreSQL, MySQL, MongoDB, Redis, SQLite, and ClickHouse.

Use it to plan schemas, improve queries and database performance, optimize storage and indexes, manage operations, and work with databases through Prisma.

It helps match a data problem to an appropriate database and organize decisions around design, speed, optimization, and day-to-day operation. It also supports questions across many database systems.

database-lord — Skill for Claude Code and Codex by m3taz-ahmed

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 m3taz-ahmed/ai-globals --skill database-lord

Clone the repo

git clone --depth 1 https://github.com/m3taz-ahmed/ai-globals

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/m3taz-ahmed/ai-globals/database-lord/github.svg)](https://agentmods.dev/skills/m3taz-ahmed/ai-globals/database-lord)

Your own site

<a href="https://agentmods.dev/skills/m3taz-ahmed/ai-globals/database-lord"><img src="https://agentmods.dev/badge/skills/m3taz-ahmed/ai-globals/database-lord/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/m3taz-ahmed/ai-globals/database-lord"><img src="https://agentmods.dev/badge/skills/m3taz-ahmed/ai-globals/database-lord.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 410 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.

Model	Per session	Once invoked
Fable 5.1	$0.00033	$0.00410
Opus 5	$0.00016	$0.00205
Sonnet 5	$0.00007	$0.00082
Haiku 4.5	$0.00003	$0.00041

Measured 12d ago against content hash 835fa233b8ef, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

database-lord 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 12d 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.

skills/database-lord/SKILL.md · 14 lines

What it actually says

[SKILL] database-lord [OBJ] Design, performance-tune, optimize, and operate relational/document/key-value/analytical databases via Context7. [RULES]

[CMD] IDs: PostgreSQL /websites/postgresql_17 source /postgres/postgres; MySQL /websites/dev_mysql_doc source /mysql/mysql-server; MariaDB /websites/mariadb source /mariadb/server; MongoDB /websites/mongodb_manual source /mongodb/mongo; Redis /redis/docs source /redis/redis-doc; SQLite /websites/devdocs_io_sqlite source /sqlite/sqlite; SQL Server /microsoftdocs/sql-docs; Oracle /websites/oracle_en_database_oracle_oracle-database_19; ClickHouse /websites/clickhouse source /clickhouse/clickhouse-docs; DuckDB /duckdb/duckdb-web source /duckdb/duckdb; Meilisearch /websites/meilisearch; TiDB /pingcap/docs source /pingcap/tidb; Prisma /prisma/web source /prisma/prisma.
[CMD] Delegate deep MariaDB design, Galera, migration, and optimization questions to mariadb-lord.
[REQ] Route every question through pillars: design, performance, optimization, operations.
[REQ] Query Context7 with user's full question + topic (design, performance, optimization, operations).
[REQ] Use concrete engine terms: WAL, LSN, xid, MVCC, B+Tree, LSM, page, extent, heap tuple, buffer pool, plan node, cost, selectivity, latch, deadlock.
[REQ] Cross-engine answers query both IDs and explain design rationale.

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.

12d ago First seen · 14 lines · 33 tokens per session scan A 835fa233b8ef

Subscribe to this mod's changes

database-lord is a skill published in the GitHub repository m3taz-ahmed/ai-globals (5 stars, last pushed yesterday), licensed MIT. It adds 33 tokens to every session and 410 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 2026-08-31.

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