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Agent skill

Postgres Expert

by RightNow-AI in RightNow-AI/openfang

PostgreSQL expert for query optimization, indexing, extensions, and database administration

Apache-2.0Auto-check passedDatabases

Install Postgres Expert

skills CLI
$ npx skills add RightNow-AI/openfang --skill postgres-expert -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install RightNow-AI/openfang postgres-expert --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/RightNow-AI/openfang.git skills-src && mkdir -p .claude/skills && cp -r skills-src/crates/openfang-skills/bundled/postgres-expert .claude/skills/postgres-expert && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
postgres-expert
GitHub stars
18k
Token cost
~830 tokens
SKILL.md length
423 words
Files
1
Skills in repo
68
Repo updated
First seen
Licence
Apache-2.0

At a glance

PostgreSQL expert for query optimization, indexing, extensions, and database administration

  • Tasks that involve Query optimization
  • SKILL.md covers Key Principles, Techniques, Common Patterns and Pitfalls to Avoid
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Tasks that involve Database administration

What it does

Postgres Expert is an agent skill from RightNow-AI/openfang. PostgreSQL expert for query optimization, indexing, extensions, and database administration

Its SKILL.md is about 830 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Databases, covering Query optimization and Database administration. It works with PostgreSQL. The repository describes itself as: Open-source Agent Operating System. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Query optimization
  • Tasks that involve Database administration

Example prompts

  • “/postgres-expert”

What it can do on your machine

Read from SKILL.md and the folder at commit acf2587. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Postgres Expert loads about 830 tokens when it runs. Until then it costs about 27 tokens; SKILL.md has 423 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~27
When it runs · the whole SKILL.md, loaded when a task matches
~830

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from RightNow-AI/openfang at commit acf2587, republished under its Apache-2.0 licence (© RightNow-AI). 423 words, ~830 tokens.

Download SKILL.mdSave it as .claude/skills/postgres-expert/SKILL.md (or your agent's skills folder).
name
postgres-expert
description
PostgreSQL expert for query optimization, indexing, extensions, and database administration

PostgreSQL Database Expertise

You are an expert database engineer specializing in PostgreSQL query optimization, schema design, indexing strategies, and operational administration. You write queries that are efficient at scale, design schemas that balance normalization with read performance, and configure PostgreSQL for production workloads. You understand the query planner, MVCC, and the tradeoffs between different index types.

Key Principles

  • Always analyze query plans with EXPLAIN (ANALYZE, BUFFERS, FORMAT TEXT) before and after optimization
  • Choose the right index type for the access pattern: B-tree for equality and range, GIN for full-text and JSONB, GiST for geometric and range types, BRIN for naturally ordered large tables
  • Normalize to third normal form by default; denormalize deliberately with materialized views or JSONB columns when read performance demands it
  • Use transactions appropriately; keep them short to reduce lock contention and MVCC bloat
  • Monitor with pg_stat_statements for slow query identification and pg_stat_user_tables for sequential scan detection

Techniques

  • Write CTEs with WITH for readability but be aware that prior to PostgreSQL 12 they act as optimization barriers; use MATERIALIZED/NOT MATERIALIZED hints when needed
  • Apply window functions like ROW_NUMBER() OVER (PARTITION BY user_id ORDER BY created_at DESC) for top-N-per-group queries
  • Use JSONB operators (->, ->>, @>, ?) with GIN indexes for semi-structured data stored alongside relational columns
  • Implement table partitioning with PARTITION BY RANGE on timestamp columns for time-series data; combine with partition pruning for fast queries
  • Run VACUUM (VERBOSE) and ANALYZE after bulk operations; configure autovacuum_vacuum_scale_factor per-table for heavy-write tables
  • Use pgbouncer in transaction pooling mode to handle thousands of short-lived connections without exhausting PostgreSQL backend processes
Show full SKILL.md (168 more words)Show less

Common Patterns

  • Covering Index: Add INCLUDE (column) to an index so that queries can be satisfied from the index alone without heap access (index-only scan)
  • Partial Index: Create CREATE INDEX ON orders (created_at) WHERE status = 'pending' to index only the rows that queries actually filter on
  • Upsert with Conflict: Use INSERT ... ON CONFLICT (key) DO UPDATE SET ... for atomic insert-or-update operations without application-level race conditions
  • Advisory Locks: Use pg_advisory_lock(hash_key) for application-level distributed locking without creating dedicated lock tables

Pitfalls to Avoid

  • Do not use SELECT * in production queries; specify columns explicitly to enable index-only scans and reduce I/O
  • Do not create indexes on every column preemptively; each index adds write overhead and vacuum work proportional to the table's update rate
  • Do not use NOT IN (subquery) with nullable columns; it produces unexpected results due to SQL three-valued logic; use NOT EXISTS instead
  • Do not set work_mem globally to a large value; it is allocated per-sort-operation and can cause OOM with concurrent queries; set it per-session for analytical workloads

© RightNow-AI, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in crates/openfang-skills/bundled/postgres-expert of RightNow-AI/openfang.

Open the folder on GitHubat commit acf2587

Compare with similar skills

Postgres Expert next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Postgres Expert compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Postgres Expert this skillRightNow-AI/openfang18k—~830Automated safety check: PassApache-2.0
Postgres Expertcin12211/orca-q224—~5.5kAutomated safety check: PassMIT
Postgres Optimizationrohitg00/awesome-claude-code-toolkit2.7k—~1.1kAutomated safety check: PassApache-2.0
DB Ops SopOpenDCAI/DataMind423—~388Automated safety check: PassApache-2.0
PostgreSQL ProJeffallan/claude-skills12k—~1.5kAutomated safety check: PassMIT
PlanetScale Postgres Playbookplanetscale/database-skills7053 repos~1.8kAutomated safety check: PassMIT

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Works with

Categories

Questions about Postgres Expert

What does Postgres Expert do?

PostgreSQL expert for query optimization, indexing, extensions, and database administration. Postgres Expert is an agent skill from RightNow-AI/openfang.

When should I use Postgres Expert?

Postgres Expert fits situations like: tasks that involve Query optimization; tasks that involve Database administration.

How do I install Postgres Expert in Claude Code?

Run `npx skills add RightNow-AI/openfang --skill postgres-expert -a claude-code`. Or copy the skill folder (crates/openfang-skills/bundled/postgres-expert in RightNow-AI/openfang) into .claude/skills/postgres-expert in your project. Claude Code loads it when a task matches its description.

How do I install Postgres Expert in Codex?

Run `npx skills add RightNow-AI/openfang --skill postgres-expert -a codex`. Or copy the skill folder (crates/openfang-skills/bundled/postgres-expert in RightNow-AI/openfang) into .agents/skills/postgres-expert in your project. Codex loads it when a task matches its description.

Can I use Postgres Expert in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add RightNow-AI/openfang --skill postgres-expert -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/postgres-expert, .gemini/skills/postgres-expert, .github/skills/postgres-expert and .opencode/skills/postgres-expert in your project.

What does Postgres Expert need to run?

SKILL.md names no scripts, command-line tools or credentials: Postgres Expert is instructions for the agent only.

Does Postgres Expert access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Postgres Expert safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Postgres Expert use?

Postgres Expert is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Postgres Expert use?

About 830 tokens (SKILL.md is roughly 3.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Postgres Expert?

Skills that share tags, products or a category with Postgres Expert: Postgres Expert (cin12211/orca-q, 224 stars), Postgres Optimization (rohitg00/awesome-claude-code-toolkit, 2.7k stars), DB Ops Sop (OpenDCAI/DataMind, 423 stars) and PostgreSQL Pro (Jeffallan/claude-skills, 12k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Postgres Expert?

RightNow-AI (a GitHub organization) maintains it in RightNow-AI/openfang, which has 18,213 GitHub stars. The repository holds 68 skills in this directory. The repository was last updated on July 2, 2026.

Source: RightNow-AI/openfang on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.