db

db is a command for Claude Code from jdanigo/hydraia. It costs 27 tokens per session (199 once invoked), scanned A, original, MIT.

A database-performance investigator and fixer that examines queries, indexes, locks, connection pooling, schema changes, and related causes. It uses evidence such as EXPLAIN plans, which show how a database intends to run a query.

In plain words
What is it for?
Use it to investigate slow queries, missing indexes, repeated queries known as N+1 problems, lock contention, connection limits, schema issues, and possible caching improvements.
Why use it?
It replaces database tuning by guesswork with measured evidence and a numeric baseline and target. Changes that write data are planned safely rather than performed directly by the agent.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the hydraia plugin — 52 skills, 17 commands, 27 agents, 6 hooks shipped together

Good fit Use it to investigate slow queries, missing indexes, repeated queries known as N+1 problems, lock contention, connection limits, schema issues, and possible caching improvements.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/jdanigo/hydraia/db
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/jdanigo/hydraia

Made for: Claude Code.

Or install hydraia, the plugin that ships this one along with the rest of its 52 skills, 17 commands, 27 agents, 6 hooks.

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 db

README.md
[![agentmods](https://agentmods.dev/badge/commands/jdanigo/hydraia/db/github.svg)](https://agentmods.dev/commands/jdanigo/hydraia/db)
Your own site
<a href="https://agentmods.dev/commands/jdanigo/hydraia/db"><img src="https://agentmods.dev/badge/commands/jdanigo/hydraia/db/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 db

Your own site · 80×15
<a href="https://agentmods.dev/commands/jdanigo/hydraia/db"><img src="https://agentmods.dev/badge/commands/jdanigo/hydraia/db.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 199 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 $0.00027 $0.00199
Opus 5.5 $0.00011 $0.00080
Sonnet 5.5 $0.00005 $0.00040
Haiku 4.5 $0.00003 $0.00020

Measured 1mo ago against content hash d33d838a3ffe, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 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.

commands/db.md · 9 lines

What it actually says

Invoke the hydraia skill forcing the Phase -1 route to performance (DB-shaped). Follow the performance-tuning and db-optimization skills with the db-performance-tuner agent as PRIMARY diagnostician: detect the engine from evidence, collect read-only evidence (EXPLAIN plans, stat views, slow logs — redacting data values), classify findings (index, query shape, N+1, locking, pooling, schema, caching), write the spec with baseline + numeric target, then run the full pipeline. Schema changes follow expand-contract; write-shaped operations are plan tasks, never direct agent actions. Dispatch perf-engineer too only if the evidence points outside the database.

Request: $ARGUMENTS

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 · 9 lines · 27 tokens per session scan A d33d838a3ffe

Subscribe to this mod's changes

db is a command published in the GitHub repository jdanigo/hydraia (8 stars, last pushed 25d ago), licensed MIT. It adds 27 tokens to every session and 199 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 2026-08-31.