supabase

supabase is a skill for Claude Code, Codex from nth5693/gemini-kit. It costs 19 tokens per session (327 once invoked), scanned A, original, MIT.

A set of instructions for working with Supabase, a service that provides a database, user sign-in, and backend features. It covers database structure, migrations, access rules, authentication, and query performance.

In plain words
What is it for?
Use it to design database schemas, write migrations, create Row Level Security policies, debug Supabase authentication or queries, and improve database performance.
Why use it?
It helps avoid mistakes when changing stored data, controlling who can access it, or diagnosing sign-in and database problems.

Skill for Claude CodeCodex

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

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is ./scripts/log-skill.sh "supabase" "manual" "$$".

Good fit Use it to design database schemas, write migrations, create Row Level Security policies, debug Supabase authentication or queries, and improve database performance.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/nth5693/gemini-kit
agentmods
npx agentmods add skills/nth5693/gemini-kit/supabase

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 supabase

README.md
[![agentmods](https://agentmods.dev/badge/skills/nth5693/gemini-kit/supabase/github.svg)](https://agentmods.dev/skills/nth5693/gemini-kit/supabase)
Your own site
<a href="https://agentmods.dev/skills/nth5693/gemini-kit/supabase"><img src="https://agentmods.dev/badge/skills/nth5693/gemini-kit/supabase/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

Your own site · 80×15
<a href="https://agentmods.dev/skills/nth5693/gemini-kit/supabase"><img src="https://agentmods.dev/badge/skills/nth5693/gemini-kit/supabase.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 327 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 $0.00019 $0.00327
Opus 5.5 $0.00008 $0.00131
Sonnet 5.5 $0.00004 $0.00065
Haiku 4.5 $0.00002 $0.00033

Measured 1mo ago against content hash 45ce89ebef24, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

supabase 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • supabase — 100% identical, 0 lines differ
skills/examples/supabase/SKILL.md · 47 lines

What it actually says

Supabase Skill

Overview

Provides comprehensive expertise for Supabase development in [PROJECT_NAME] including:

  • Database schema design and migrations
  • Row Level Security (RLS) policy implementation
  • Auth integration debugging
  • Performance optimization

When To Use

  • Creating or modifying database schemas
  • Writing database migrations
  • Implementing RLS policies
  • Debugging Supabase auth or query issues
  • Optimizing database performance

Instrumentation

# Log usage when using this skill
./scripts/log-skill.sh "supabase" "manual" "$$"

What do you want to do?

  1. Create Database Migration → Read workflows/migration-workflow.md
  2. Design RLS Policies → Read workflows/rls-policies.md
  3. Debug Supabase Issues → Read workflows/debugging.md
  4. Design Database Schema → Read workflows/schema-design.md
  5. Review Best Practices → Read references/best-practices.md
  6. See Common Patterns → Read references/common-patterns.md

Quick Reference

Migration Template: templates/migration-template.sql
RLS Template: templates/rls-policy-template.sql
Existing Migrations: backend/migrations/
Supabase Client: lib/supabaseClient.ts

Files

What ships with it

8 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. 1mo ago First seen · 47 lines · 19 tokens per session scan A 45ce89ebef24

Subscribe to this mod's changes

supabase is a skill published in the GitHub repository nth5693/gemini-kit (372 stars, last pushed 7mo ago), licensed MIT. It adds 19 tokens to every session and 327 once invoked, about $0.0001 per session on Opus 5.5. 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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supabase-cli

This skill should be used when user asks to "use supabase CLI", "supabase init", "supabase start", "run migrations", "deploy edge functions", "manage Supabase project", or works with the supabase command-line tool for local development and project management.

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