Agent skill

Postgres Database

PostgreSQL schema design, indexing, and query patterns. An agent skill from cohen-liel/hivemind.

Apache-2.0Auto-check passedDatabases

Install Postgres Database

skills CLI

$ npx skills add cohen-liel/hivemind --skill postgres-database -a claude-code

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

GitHub CLI

$ gh skill install cohen-liel/hivemind postgres-database --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/cohen-liel/hivemind.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/postgres-database .claude/skills/postgres-database && 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/

Paste into Claude Code

Install the "postgres-database" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/postgres-database into .claude/skills/postgres-database/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "postgres-database", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/postgres-database

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add cohen-liel/hivemind --skill postgres-database -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install cohen-liel/hivemind postgres-database --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/postgres-database .agents/skills/postgres-database && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "postgres-database" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/postgres-database into .agents/skills/postgres-database/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "postgres-database", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add cohen-liel/hivemind --skill postgres-database -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install cohen-liel/hivemind postgres-database --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/postgres-database .cursor/skills/postgres-database && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "postgres-database" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/postgres-database into .cursor/skills/postgres-database/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "postgres-database", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/cohen-liel/hivemind.git --path .claude/skills/postgres-database

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add cohen-liel/hivemind --skill postgres-database -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install cohen-liel/hivemind postgres-database --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/postgres-database .gemini/skills/postgres-database && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "postgres-database" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/postgres-database into .gemini/skills/postgres-database/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "postgres-database", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install cohen-liel/hivemind postgres-database

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add cohen-liel/hivemind --skill postgres-database -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/postgres-database .github/skills/postgres-database && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "postgres-database" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/postgres-database into .github/skills/postgres-database/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "postgres-database", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add cohen-liel/hivemind --skill postgres-database -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install cohen-liel/hivemind postgres-database --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/postgres-database .opencode/skills/postgres-database && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "postgres-database" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/postgres-database into .opencode/skills/postgres-database/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "postgres-database", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: postgres-database
GitHub stars: 110
Token cost: ~649 tokens
SKILL.md length: 112 words
Files: 1
Skills in repo: 33
Repo updated: Apr 18, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

PostgreSQL schema design, indexing, and query patterns. An agent skill from cohen-liel/hivemind.

Designing database schemas
SKILL.md covers Schema Design Principles, Essential Indexes, Migration Pattern (Alembic) and Query Patterns, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Writing migrations

What it does

Postgres Database is an agent skill from cohen-liel/hivemind. PostgreSQL schema design, indexing, and query patterns. Use when designing database schemas, writing migrations, optimizing queries, or working with any PostgreSQL database.

Its SKILL.md is about 650 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 Database schema design. It works with PostgreSQL. The repository describes itself as: One prompt. A full AI engineering team. Go lie on the couch. 🧠. The licence is Apache-2.0.

When your agent uses it

Designing database schemas
Writing migrations
Optimizing queries
Working with any PostgreSQL database

Example prompts

“/postgres-database”

Requirements

Python 3

What it can do on your machine

Read from SKILL.md and the folder at commit 918dd9b. 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 (its code samples are sql and python).
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 Database loads about 649 tokens when it runs. Until then it costs about 48 tokens; SKILL.md has 112 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~48
When it runs · the whole SKILL.md, loaded when a task matches: ~649

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 cohen-liel/hivemind at commit 918dd9b, republished under its Apache-2.0 licence (© cohen-liel). 112 words, ~649 tokens.

Download SKILL.mdSave it as .claude/skills/postgres-database/SKILL.md (or your agent's skills folder).

name: postgres-database
description: PostgreSQL schema design, indexing, and query patterns. Use when designing database schemas, writing migrations, optimizing queries, or working with any PostgreSQL database.

PostgreSQL Database Patterns

Schema Design Principles

Always add created_at, updated_at timestamps to every table
Use UUID or BIGSERIAL for primary keys (UUID for distributed systems)
Use foreign key constraints (never orphaned rows)
Normalize to 3NF, then denormalize only for proven performance needs
Soft delete with deleted_at TIMESTAMP NULL instead of hard delete

Essential Indexes

sql

-- Always index foreign keys
CREATE INDEX idx_posts_user_id ON posts(user_id);

-- Composite index for common filter+sort patterns
CREATE INDEX idx_posts_user_created ON posts(user_id, created_at DESC);

-- Partial index for active records only
CREATE INDEX idx_users_active_email ON users(email) WHERE deleted_at IS NULL;

-- Full text search
CREATE INDEX idx_posts_fts ON posts USING GIN(to_tsvector('english', title || ' ' || body));

Migration Pattern (Alembic)

python

def upgrade():
    op.create_table('posts',
        sa.Column('id', sa.BigInteger(), primary_key=True),
        sa.Column('user_id', sa.BigInteger(), sa.ForeignKey('users.id'), nullable=False),
        sa.Column('title', sa.String(255), nullable=False),
        sa.Column('body', sa.Text(), nullable=False),
        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.Column('updated_at', sa.DateTime(timezone=True), onupdate=sa.func.now()),
    )
    op.create_index('idx_posts_user_id', 'posts', ['user_id'])

def downgrade():
    op.drop_table('posts')

Query Patterns

sql

-- Pagination (use keyset, not OFFSET for large tables)
SELECT * FROM posts
WHERE created_at < $1  -- cursor
ORDER BY created_at DESC
LIMIT 20;

-- Avoid N+1: use JOIN or subquery
SELECT u.*, COUNT(p.id) as post_count
FROM users u
LEFT JOIN posts p ON p.user_id = u.id
GROUP BY u.id;

-- Upsert
INSERT INTO settings(user_id, key, value)
VALUES ($1, $2, $3)
ON CONFLICT (user_id, key) DO UPDATE SET value = EXCLUDED.value;

Rules

NEVER use SELECT * in production queries — list columns explicitly
Always use parameterized queries — never f-string SQL (SQL injection risk)
Use connection pooling (PgBouncer or SQLAlchemy pool_size)
Run EXPLAIN ANALYZE on slow queries before adding indexes
Use transactions for multi-table writes
Vacuum and analyze after bulk operations
Set statement_timeout to prevent runaway queries

Files

Just SKILL.md in .claude/skills/postgres-database of cohen-liel/hivemind.

Open the folder on GitHubat commit 918dd9b

Compare with similar skills

Postgres Database 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 Database compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Postgres Database this skillcohen-liel/hivemind	110	—	~649	Automated safety check: Pass	Apache-2.0	5 mo ago
Postgres PatternsThibautBaissac/rails_ai_agents	665	7 repos	~922	Automated safety check: Pass	MIT	4 mo ago
Database DesignxenitV1/Antigravity-Workflows	130	7 repos	~378	Automated safety check: Pass	MIT	8 mo ago
Postgres Schema Designdavila7/claude-code-templates	32k	—	~4k	Automated safety check: Pass	Apache-2.0	yesterday
Database Design Patternscuriositech/some_claude_skills	243	—	~3.1k	Automated safety check: Pass	MIT	1 mo ago
Performancekid-sid/claude-spellbook	189	—	~3.8k	Automated safety check: Pass	MIT	2 mo ago

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Questions about Postgres Database

What does Postgres Database do?

PostgreSQL schema design, indexing, and query patterns. An agent skill from cohen-liel/hivemind. Postgres Database is an agent skill from cohen-liel/hivemind. PostgreSQL schema design, indexing, and query patterns.

When should I use Postgres Database?

Postgres Database fits situations like: designing database schemas; writing migrations; optimizing queries; working with any PostgreSQL database.

How do I install Postgres Database in Claude Code?

Run `npx skills add cohen-liel/hivemind --skill postgres-database -a claude-code`. Or copy the skill folder (.claude/skills/postgres-database in cohen-liel/hivemind) into .claude/skills/postgres-database in your project. Claude Code loads it when a task matches its description.

How do I install Postgres Database in Codex?

Run `npx skills add cohen-liel/hivemind --skill postgres-database -a codex`. Or copy the skill folder (.claude/skills/postgres-database in cohen-liel/hivemind) into .agents/skills/postgres-database in your project. Codex loads it when a task matches its description.

Can I use Postgres Database 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 cohen-liel/hivemind --skill postgres-database -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-database, .gemini/skills/postgres-database, .github/skills/postgres-database and .opencode/skills/postgres-database in your project.

What does Postgres Database need to run?

SKILL.md names no scripts, command-line tools or credentials: Postgres Database is instructions for the agent only. Our summary lists: Python 3.

Does Postgres Database 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 Database 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 Database use?

Postgres Database 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 Database use?

About 649 tokens (SKILL.md is roughly 2.6k 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 Database?

Skills that share tags, products or a category with Postgres Database: Postgres Patterns (ThibautBaissac/rails_ai_agents, 665 stars), Database Design (xenitV1/Antigravity-Workflows, 130 stars), Postgres Schema Design (davila7/claude-code-templates, 32k stars) and Database Design Patterns (curiositech/some_claude_skills, 243 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Postgres Database?

cohen-liel (a GitHub user) maintains it in cohen-liel/hivemind, which has 110 GitHub stars. The repository holds 33 skills in this directory. The repository was last updated on April 18, 2026.

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

Postgres Database

Install Postgres Database

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

PostgreSQL Database Patterns

Schema Design Principles

Essential Indexes

Migration Pattern (Alembic)

Query Patterns

Rules

Files

Compare with similar skills

Similar skills

Postgres Patterns

Database Design

Postgres Schema Design

Database Design Patterns

Performance

Postgresql

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Docker Deployment

E2E Testing

Questions about Postgres Database

Install Postgres Database

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

PostgreSQL Database Patterns

Schema Design Principles

Essential Indexes

Migration Pattern (Alembic)

Query Patterns

Rules

Files

Compare with similar skills

Similar skills

More from cohen-liel/hivemind

Related

Questions about Postgres Database