A command for running read-only PostgreSQL database queries in a development or test environment. PostgreSQL is a database system, and an analytics query is used to inspect data or database performance.

Use it to count signups, inspect slow queries, review table sizes, and check index usage through Tidewave, psql, or an Elixir Mix task.

It provides a quick way to answer database questions without changing records or accidentally querying production.

psql-query — Command for Claude Code by oliver-kriska

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.

Clone the repo

git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix

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.

README.md

[![agentmods](https://agentmods.dev/badge/commands/oliver-kriska/claude-elixir-phoenix/psql-query.svg)](https://agentmods.dev/commands/oliver-kriska/claude-elixir-phoenix/psql-query)

Your own site

<a href="https://agentmods.dev/commands/oliver-kriska/claude-elixir-phoenix/psql-query"><img src="https://agentmods.dev/badge/commands/oliver-kriska/claude-elixir-phoenix/psql-query.svg" alt="Measured on agentmods" height="20"></a>

Per session 16 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 325 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.

Model	Per session	Once invoked
Fable 5.1	$0.00016	$0.00325
Opus 5	$0.00008	$0.00162
Sonnet 5	$0.00003	$0.00065
Haiku 4.5	$0.00002	$0.00032

Measured 8d ago against content hash 787e83e79ed3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

psql-query 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 8d 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/psql-query.md · 40 lines

What it actually says

PostgreSQL Analytics

Run analytics queries against the local database using psql or mix run.

Rules

NEVER run against production
Use READ-ONLY queries (SELECT only)
For complex analysis, use Repo.query/2 in a Mix task
Format results as ASCII tables or pipe to column -t

Tidewave Integration

If Tidewave MCP is available, prefer it over psql/mix run:

mcp__tidewave__execute_sql_query for direct SQL queries
mcp__tidewave__project_eval for Ecto-based queries via Repo.query!/2 or Repo.all/1

Fall back to psql/mix run only if Tidewave is not detected.

Workflow

Check if Tidewave MCP is available — if yes, use mcp__tidewave__execute_sql_query
Otherwise, detect database URL from config/dev.exs or DATABASE_URL
Run query via: psql $DATABASE_URL -c "YOUR QUERY" --expanded
For Ecto: mix run -e 'MyApp.Repo.query!("SELECT ...") |> IO.inspect()'
Summarize results

Example prompts

"How many users signed up this week?"
"Show me the slowest queries from pg_stat_statements"
"What's the table size distribution?"
"Show index usage stats"

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.

8d ago First seen · 40 lines · 16 tokens per session scan A 787e83e79ed3

Subscribe to this mod's changes

psql-query is a command published in the GitHub repository oliver-kriska/claude-elixir-phoenix (539 stars, last pushed 2d ago), licensed MIT. It adds 16 tokens to every session and 325 once invoked, about $0.0001 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.

Analytics and metrics Claude Code Databases PostgreSQL automation claude claude-code-plugin claude-code-skills claude-skills

psql-query