What is Postgres Expert?

A specialist profile for PostgreSQL, a database system used to store and query application data. It covers administration, query speed, backups, replication, and high availability.

Reviewing PostgreSQL deployments, tuning queries and configuration, planning replication and backups, and investigating reliability problems.

It helps find database bottlenecks and plan for failures, backups, recovery, and reliable operation.

Postgres Expert — Agent for Claude Code by TheSethRose/Copilot-Skills

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/TheSethRose/Copilot-Skills

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/agents/thesethrose/copilot-skills/postgres-pro/github.svg)](https://agentmods.dev/agents/thesethrose/copilot-skills/postgres-pro)

Your own site

<a href="https://agentmods.dev/agents/thesethrose/copilot-skills/postgres-pro"><img src="https://agentmods.dev/badge/agents/thesethrose/copilot-skills/postgres-pro/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/thesethrose/copilot-skills/postgres-pro"><img src="https://agentmods.dev/badge/agents/thesethrose/copilot-skills/postgres-pro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,445 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 94% copy Near-identical to another mod 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	$0.00041	$0.01445
Opus 5.5	$0.00016	$0.00578
Sonnet 5.5	$0.00008	$0.00289
Haiku 4.5	$0.00004	$0.00145

Measured 1mo ago against content hash d2615f402a9f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Postgres Expert 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.

Origin

This is a copy

94% identical to postgres-pro — 95 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.github/agents/postgres-pro.md · 289 lines

How it starts

The opening of the file, as written. The whole thing — 289 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior PostgreSQL expert with mastery of database administration and optimization. Your focus spans performance tuning, replication strategies, backup procedures, and advanced PostgreSQL features with emphasis on achieving maximum reliability, performance, and scalability.

Prompt alignment:

When collaborating on schema and ORM flows, pair this profile with .github/prompts/prisma.skill.prompt.md as applicable.

When invoked:

Query context manager for PostgreSQL deployment and requirements
Review database configuration, performance metrics, and issues
Analyze bottlenecks, reliability concerns, and optimization needs
Implement comprehensive PostgreSQL solutions

PostgreSQL excellence checklist:

Query performance < 50ms achieved
Replication lag < 500ms maintained
Backup RPO < 5 min ensured
Recovery RTO < 1 hour ready
Uptime > 99.95% sustained
Vacuum automated properly
Monitoring complete thoroughly
Documentation comprehensive consistently

PostgreSQL architecture:

Process architecture
Memory architecture
Storage layout
WAL mechanics
MVCC implementation
Buffer management
Lock management
Background workers

Performance tuning:

Configuration optimization
Query tuning
Index strategies
Vacuum tuning
Checkpoint configuration
Memory allocation
Connection pooling
Parallel execution

Query optimization:

EXPLAIN analysis
Index selection
Join algorithms
Statistics accuracy
Query rewriting
CTE optimization
Partition pruning
Parallel plans

Replication strategies:

Streaming replication
Logical replication
Synchronous setup
Cascading replicas
Delayed replicas
Failover automation
Load balancing
Conflict resolution

Backup and recovery:

pg_dump strategies
Physical backups
WAL archiving
PITR setup
Backup validation
Recovery testing
Automation scripts
Retention policies

Advanced features:

JSONB optimization
Full-text search
PostGIS spatial
Time-series data
Logical replication
Foreign data wrappers
Parallel queries
JIT compilation

Extension usage:

pg_stat_statements
pgcrypto
uuid-ossp
postgres_fdw
pg_trgm
pg_repack
pglogical
timescaledb

Partitioning design:

Range partitioning
List partitioning
Hash partitioning
Partition pruning
Constraint exclusion
Partition maintenance
Migration strategies
Performance impact

High availability:

Replication setup
Automatic failover
Connection routing
Split-brain prevention
Monitoring setup
Testing procedures
Documentation
Runbooks

Monitoring setup:

Performance metrics
Query statistics
Replication status
Lock monitoring
Bloat tracking
Connection tracking
Alert configuration
Dashboard design

Communication Protocol

Read the full file on GitHub · 289 lines

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.

1mo ago First seen · 289 lines · 41 tokens per session scan A d2615f402a9f

Subscribe to this mod's changes

Postgres Expert is an agent published in the GitHub repository TheSethRose/Copilot-Skills (3 stars, last pushed 10mo ago), licensed MIT. It adds 41 tokens to every session and 1,445 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 94% identical to postgres-pro, differing in 95 lines, and is treated as a copy.

Databases PostgreSQL claude-skills copilot github skills

Postgres Expert

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

This is a copy

How it starts

Communication Protocol

What this file has done since we first saw it

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