Supabase Hello World

What it does

When your agent uses it

• Starting a new Supabase project
• Verifying your connection works
• Learning the basic insert-then-select pattern with @supabase/supabase-js
• With phrases like supabase hello world

Example prompts

• “supabase hello world”
• “first supabase query”
• “supabase quick start”
• “/supabase-hello-world”

Requirements

• Python 3
• Node.js
• A credential in SUPABASE_ANON_KEY
• Compatibility (from SKILL.md): Designed for Claude Code
• Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(npm:*), Bash(npx:*), Bash(supabase:*)

Workflow steps

3 steps, taken from the step headings in SKILL.md.

1. 1Create the todos Table
2. 2Insert a Row
3. 3Read It Back

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Write
  • Edit
  • Bash(npm:*)
  • Bash(npx:*)
  • Bash(supabase:*)

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • npm
  • pip

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • supabase.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • SUPABASE_ANON_KEY

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

• Compatibility

  Designed for Claude Code

  From compatibility in the SKILL.md frontmatter.

Context cost

Supabase Hello World loads about 1.4k tokens when it runs, and up to ~2.4k if it reads all its reference files. Until then it costs about 98 tokens; SKILL.md has 476 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~98

When it runs · the whole SKILL.md, loaded when a task matches

~1.4k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~2.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

• NoteMentions a .env fileSKILL.md:27

  -auth` setup (project URL + anon key in `.env`)

• NoteMentions a .env fileSKILL.md:110

  | `Invalid API key` | Wrong anon key in `.env` | Copy from Settings > API in the dashboard |

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 476 words, ~1,392 tokens.

name

supabase-hello-world

description

Run your first Supabase query — insert a row and read it back. Use when starting a new Supabase project, verifying your connection works, or learning the basic insert-then-select pattern with @supabase/supabase-js. Trigger with phrases like "supabase hello world", "first supabase query", "supabase quick start", "test supabase connection", "supabase insert and select".

allowed-tools

Read, Write, Edit, Bash(npm:*), Bash(npx:*), Bash(supabase:*)

compatibility

Designed for Claude Code

version

1.54.0

license

MIT

author

Jeremy Longshore <jeremy@intentsolutions.io>

tags

saas, supabase, database, getting-started

create table public.todos (
  id bigint generated always as identity primary key,
  task text not null,
  is_complete boolean default false,
  inserted_at timestamptz default now()
);

alter table public.todos enable row level security;

create policy "Allow public read" on public.todos
  for select using (true);

create policy "Allow public insert" on public.todos
  for insert with check (true);

import { createClient } from '@supabase/supabase-js'

const supabase = createClient(
  process.env.SUPABASE_URL!,
  process.env.SUPABASE_ANON_KEY!
)

const { data, error } = await supabase
  .from('todos')
  .insert({ task: 'Hello from Supabase!' })
  .select()

const { data: todos } = await supabase.from('todos').select('*')
// [{ id: 1, task: "Hello from Supabase!", is_complete: false, ... }]

const { data } = await supabase
  .from('todos')
  .insert({ task: 'Hello!' })
  .select()
  .single()

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in skills/.curated/supabase-hello-world of jeremylongshore/tons-of-skills-marketplace.

• SKILL.md
• references/examples.md
• references/implementation.md

Open the folder on GitHubat commit cfae287