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supabase-postgres-best-practices

supabase-postgres-best-practices is a skill for Claude Code from YuDefine/nuxt-supabase-starter. It costs 182 tokens per session (707 once invoked), scanned A, a copy of supabase-postgres-best-practices, MIT.

A reference guide to designing, querying, securing, and tuning PostgreSQL databases, maintained by Supabase. PostgreSQL is a database system, while row-level security controls which rows different users may access.

In plain words
What is it for?
Use it before changing PostgreSQL tables, migrations, indexes, SQL queries, connection pooling, performance settings, or row-level security policies.
Why use it?
It helps prevent slow queries, unsafe access rules, poor schema choices, and connection or concurrency problems.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

not rated 45repo today A scan 182 tokens copy · 100% MIT

Good fit Use it before changing PostgreSQL tables, migrations, indexes, SQL queries, connection pooling, performance settings, or row-level security policies.

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Install with agentmods
npx agentmods add skills/yudefine/nuxt-supabase-starter/supabase-postgres-best-practices
View source ↗ YuDefine/nuxt-supabase-starter
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 YuDefine/nuxt-supabase-starter --skill supabase-postgres-best-practices
Clone the repo
git clone --depth 1 https://github.com/YuDefine/nuxt-supabase-starter

Made for: Claude Code.

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 supabase-postgres-best-practices

README.md
[![agentmods](https://agentmods.dev/badge/skills/yudefine/nuxt-supabase-starter/supabase-postgres-best-practices/github.svg)](https://agentmods.dev/skills/yudefine/nuxt-supabase-starter/supabase-postgres-best-practices)
Your own site
<a href="https://agentmods.dev/skills/yudefine/nuxt-supabase-starter/supabase-postgres-best-practices"><img src="https://agentmods.dev/badge/skills/yudefine/nuxt-supabase-starter/supabase-postgres-best-practices/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 supabase-postgres-best-practices

Your own site · 80×15
<a href="https://agentmods.dev/skills/yudefine/nuxt-supabase-starter/supabase-postgres-best-practices"><img src="https://agentmods.dev/badge/skills/yudefine/nuxt-supabase-starter/supabase-postgres-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 182 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 707 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 100% copy Near-identical to another mod 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 $0.00182 $0.00707
Opus 5 $0.00091 $0.00353
Sonnet 5 $0.00036 $0.00141
Haiku 4.5 $0.00018 $0.00071

Measured 9d ago against content hash ad65e776f45e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

supabase-postgres-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 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.

Origin

This is a copy

100% identical to supabase-postgres-best-practices — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

template/.claude/skills/supabase-postgres-best-practices/SKILL.md · 65 lines

What it actually says

Supabase Postgres Best Practices

Comprehensive performance optimization guide for Postgres, maintained by Supabase. Contains rules across 8 categories, prioritized by impact to guide automated query optimization and schema design.

When to Apply

Reference these guidelines when:

  • Writing SQL queries or designing schemas
  • Implementing indexes or query optimization
  • Reviewing database performance issues
  • Configuring connection pooling or scaling
  • Optimizing for Postgres-specific features
  • Working with Row-Level Security (RLS)

Rule Categories by Priority

Priority Category Impact Prefix
1 Query Performance CRITICAL query-
2 Connection Management CRITICAL conn-
3 Security & RLS CRITICAL security-
4 Schema Design HIGH schema-
5 Concurrency & Locking MEDIUM-HIGH lock-
6 Data Access Patterns MEDIUM data-
7 Monitoring & Diagnostics LOW-MEDIUM monitor-
8 Advanced Features LOW advanced-

How to Use

Read individual rule files for detailed explanations and SQL examples:

references/query-missing-indexes.md
references/query-partial-indexes.md
references/_sections.md

Each rule file contains:

  • Brief explanation of why it matters
  • Incorrect SQL example with explanation
  • Correct SQL example with explanation
  • Optional EXPLAIN output or metrics
  • Additional context and references
  • Supabase-specific notes (when applicable)

References

Files

What ships with it

35 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 65 lines · 182 tokens per session scan A ad65e776f45e

Subscribe to this mod's changes

supabase-postgres-best-practices is a skill published in the GitHub repository YuDefine/nuxt-supabase-starter (45 stars, last pushed today), licensed MIT. It adds 182 tokens to every session and 707 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to supabase-postgres-best-practices, differing in 0 lines, and is treated as a copy.

Claude CodeDatabasesTDDWriting and docsai-assistednuxtsupabasetemplate
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