db

A database query command for listing schemas and tables, describing table structure, or running SQL and other database queries.

In plain words
What is it for?
Use it to list schemas or tables, inspect a table, or query PostgreSQL, MySQL, SQLite, and MongoDB databases.
Why use it?
It gives developers a consistent, non-interactive way to inspect database structure and records. A schema describes how database objects are organised.

Command for Claude Code

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.

agentmods
npx agentmods add commands/brain-bootstrap/claude-code-brain-bootstrap/db
Clone the repo
git clone --depth 1 https://github.com/brain-bootstrap/claude-code-brain-bootstrap

Made for: Claude Code.

Per session 9 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 253 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00009 $0.00253
Opus 5 $0.00005 $0.00127
Sonnet 5 $0.00002 $0.00051
Haiku 4.5 $0.00001 $0.00025

Measured 2d ago against content hash 804fff662352, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

db 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 2d 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.

.claude/commands/db.md · 29 lines

What it actually says

Query the database: $ARGUMENTS

Instructions

Determine action from arguments:

Argument Action
schemas {{DB_LIST_SCHEMAS_CMD}}
tables {{DB_LIST_TABLES_CMD}}
describe <table> {{DB_DESCRIBE_CMD}} <table>
<raw-sql> {{DB_QUERY_CMD}} "<sql>" | cat

SQLite note: If commands show $DB_PATH, set the env var to the actual DB file path before running (it varies by deployment/runtime config). Check project docs or config files for the configured path.

⚠️ Always use non-interactive mode:

  • PostgreSQL: psql -c "SQL" | cat
  • MySQL: mysql -e "SQL" | cat
  • SQLite: sqlite3 db.sqlite "SQL"
  • MongoDB: mongosh --eval "db.collection.find()" --quiet
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. 2d ago First seen · 29 lines · 9 tokens per session scan A 804fff662352

Subscribe to this mod's changes

db is a command published in the GitHub repository brain-bootstrap/claude-code-brain-bootstrap (11 stars, last pushed 4mo ago), licensed MIT. It adds 9 tokens to every session and 253 once invoked, about $0.0000 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.