database-reviewer

database-reviewer is a skill for Claude Code, Codex from myths-labs/muse. It costs 48 tokens per session (326 once invoked), scanned A, original, MIT.

A PostgreSQL database review guide focused on query speed, table design, security, and Supabase practices. PostgreSQL is a database system, while Supabase is a service built around it.

In plain words
What is it for?
It supports reviewing SQL, database schemas, migrations, row-level security policies, indexes, query plans, and Supabase realtime settings.
Why use it?
It helps identify slow queries, weak data structures, unsafe access rules, and connection or indexing problems before they cause trouble.

Skill for Claude CodeCodex

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

Good fit It supports reviewing SQL, database schemas, migrations, row-level security policies, indexes, query plans, and Supabase realtime settings.

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Install with agentmods
npx agentmods add skills/myths-labs/muse/database-reviewer
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 myths-labs/muse --skill database-reviewer
Clone the repo
git clone --depth 1 https://github.com/myths-labs/muse

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 database-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/skills/myths-labs/muse/database-reviewer/github.svg)](https://agentmods.dev/skills/myths-labs/muse/database-reviewer)
Your own site
<a href="https://agentmods.dev/skills/myths-labs/muse/database-reviewer"><img src="https://agentmods.dev/badge/skills/myths-labs/muse/database-reviewer/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 database-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/skills/myths-labs/muse/database-reviewer"><img src="https://agentmods.dev/badge/skills/myths-labs/muse/database-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 326 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 $0.00048 $0.00326
Opus 5 $0.00024 $0.00163
Sonnet 5 $0.00010 $0.00065
Haiku 4.5 $0.00005 $0.00033

Measured 9d ago against content hash 26b02d6c2aaa, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

database-reviewer 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 9d 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/ecosystem/backend-database/database-reviewer/SKILL.md · 34 lines

What it actually says

Database Reviewer Skill

This skill adopts the persona of an expert PostgreSQL/Supabase database specialist.

Usage

Invoking this skill allows you to review SQL schema, optimization, and security issues (especially RLS).

Core Responsibilities

  1. Query Performance: Index usage, Query Plan Analysis.
  2. Schema Design: Data Types, Constraints (PK/FK/Check).
  3. Security (RLS): CRITICAL for Supabase projects. Ensure (select auth.uid()) pattern vs auth.uid() for performance.
  4. Connection Management: Pooling, Timeouts.

Tools

  • read_resource: (If available) to read Supabase logs or specialized external tools.
  • run_command: To execute psql diagnostic commands if ENV is configured.
  • view_file: To review .sql migration files.

Review Checklist

  • RLS enabled on all user-data tables?
  • Indexes on all Foreign Keys?
  • No N+1 query patterns?
  • Lowercase identifiers?
  • Secrets/PII encrypted or protected?

Project Specifics

  • Supabase: Verify auth.uid() usage in Policies.
  • Realtime: Check if Replication is enabled only for necessary tables.
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. 9d ago First seen · 34 lines · 48 tokens per session scan A 26b02d6c2aaa

Subscribe to this mod's changes

database-reviewer is a skill published in the GitHub repository myths-labs/muse (32 stars, last pushed 2d ago), licensed MIT. It adds 48 tokens to every session and 326 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.

Related

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