Supabase

Supabase

Run SQL against a Supabase project through the management API: querying data, schema changes (DDL), policies (RLS), storage metadata, and migrations. SQL runs with management API privileges, so treat it as admin-level database access.

Everything goes through one script, scripts/supabase.sh, with three commands:

• env — manage connection environments (stored in environments.json)
• sql — run a SQL string
• sql-file — run SQL from a file

Environments

Each environment is a named entry in environments.json (gitignored, chmod 600) holding a url and an optional access_token. Manage them with the env subcommands:

# List configured envs (tokens masked)
scripts/supabase.sh env list

# Add an env (--url required; --access-token and --description optional)
scripts/supabase.sh env add dev  --url https://<dev-ref>.supabase.co  --access-token sbp_...
scripts/supabase.sh env add prod --url https://<prod-ref>.supabase.co --description "Production"

# Update one or more fields on an existing env
scripts/supabase.sh env update dev --url https://<new-ref>.supabase.co --access-token sbp_...

# Inspect one env: human (default), json, or shell export
scripts/supabase.sh env get dev
scripts/supabase.sh env get dev --format json
scripts/supabase.sh env get dev --format export

# Remove an env (refused if it is the only one)
scripts/supabase.sh env remove prod

# Verify at least one env is configured (non-zero exit otherwise)
scripts/supabase.sh env check

Rules the script enforces:

• env add requires --url; the env name must be unique.
• env remove is refused on the last remaining env.
• The access token is a secret. If an env has none stored, the shell SUPABASE_ACCESS_TOKEN is used instead.
• environments.json is read from the skill root, or ~/.config/claude/supabase-environments.json if that is where it already exists.

If the script reports no environments configured or SUPABASE_URL not set, the user has not finished setup: run env add to create the first env, or point them at the README.

Selecting an environment

Pick the environment per command with --env <name>. Resolution order:

1) --env <name> set            -> use that env from environments.json
2) SUPABASE_URL + TOKEN exported -> use those exported values
3) exactly one env configured  -> use it (--env optional)
4) multiple envs, none named   -> error: pass --env <name>

When the user names an environment ("in prod", "on dev"), pass --env <name>. If multiple envs exist and the user did not name one, ask which to use before running.

Running SQL

# Run a SQL string
scripts/supabase.sh sql --env dev "SELECT * FROM users LIMIT 5"
scripts/supabase.sh sql --env prod "SELECT count(*) FROM users"
scripts/supabase.sh sql --env dev "INSERT INTO users (name, email) VALUES ('Alice', 'alice@test.com')"

# Run SQL from a file (prefer for long or multi-statement SQL)
scripts/supabase.sh sql-file --env dev ./migrations/001_init.sql

• Quote the SQL. Escape inner double quotes (e.g. policy names: \"items_read_own\").
• sql sends the whole string as one query, so multiple ;-separated statements run together.
• SQL that contains $ — dollar-quoted function/trigger bodies ($$ … $$) or positional params ($1) — must go through sql-file. In a double-quoted sql argument the shell expands $$ (to its PID) and $1, corrupting the statement. File contents are sent literally, so sql-file is safe.

Reading the output

Output is the raw management API JSON, piped through jq:

• A successful query returns its result as JSON (an array of row objects for SELECT).
• A rejected query returns an object with a message field, e.g. {"message": "syntax error at or near ..."}. Detect failure by checking for a lone message key — the HTTP call (and exit code) usually still succeeds even when the SQL is rejected.

Safety

These commands run with management API (admin) privileges, so a bad statement can drop data or break a live project. Before running:

• Confirm destructive statements with the user — DROP, TRUNCATE, and any DELETE/UPDATE without a WHERE clause — especially against a production env.
• Confirm the target env for writes. If multiple envs are configured and the request is a write or DDL, verify which env (--env <name>) before running; do not let a write fall back to an auto-selected env.
• Explore read-only first. Prefer a SELECT ... LIMIT to inspect data and schema before mutating it.
• Make migrations atomic. Wrap multi-step changes in BEGIN; ... COMMIT; (via sql-file) so a mid-way failure rolls back. Note CREATE INDEX CONCURRENTLY cannot run inside a transaction — run it as a standalone statement.
• Make migrations re-runnable. Prefer CREATE TABLE IF NOT EXISTS, CREATE OR REPLACE, ADD COLUMN IF NOT EXISTS, and DROP ... IF EXISTS.

SQL reference

For ready-made examples covering DDL, indexes, enum types, views, functions/RPC, triggers, RLS, data patterns (upsert, JSONB), pgvector similarity search, storage, and schema introspection, see references/sql-cookbook.md.