agentmods.dev

database-patterns

database-patterns is a skill for Claude Code, Codex from daibang123a/golang-agent-skills. It costs 87 tokens per session (2,589 once invoked), scanned A, original, MIT.

A guide to connecting Go programs to databases and working with stored data. It covers database/sql, SQLX, GORM, connection pools, transactions, schema migrations, and tests.

In plain words
What is it for?
Use it when setting up database connections, writing SQL queries, building repository layers, adding transactions or migrations, and testing database code in Go.
Why use it?
It helps avoid common database problems such as poorly managed connections, missing cleanup, weak error handling, and untested queries.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

not rated 2repo 8mo ago A scan 87 tokens original MIT

Good fit Use it when setting up database connections, writing SQL queries, building repository layers, adding transactions or migrations, and testing database code in Go.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/daibang123a/golang-agent-skills/database-patterns
View source ↗ daibang123a/golang-agent-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.

Any agent
npx skills add daibang123a/golang-agent-skills --skill database-patterns
Clone the repo
git clone --depth 1 https://github.com/daibang123a/golang-agent-skills

Made for: Claude Code, Codex.

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 database-patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/daibang123a/golang-agent-skills/database-patterns/github.svg)](https://agentmods.dev/skills/daibang123a/golang-agent-skills/database-patterns)
Your own site
<a href="https://agentmods.dev/skills/daibang123a/golang-agent-skills/database-patterns"><img src="https://agentmods.dev/badge/skills/daibang123a/golang-agent-skills/database-patterns/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 database-patterns

Your own site · 80×15
<a href="https://agentmods.dev/skills/daibang123a/golang-agent-skills/database-patterns"><img src="https://agentmods.dev/badge/skills/daibang123a/golang-agent-skills/database-patterns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 87 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,589 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 $0.00087 $0.02589
Opus 5.5 $0.00035 $0.01036
Sonnet 5.5 $0.00017 $0.00518
Haiku 4.5 $0.00009 $0.00259

Measured 2mo ago against content hash 541e3a81f1c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

database-patterns 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 2mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/migration-check.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/database-patterns/SKILL.md · 304 lines

How it starts

The opening of the file, as written. The whole thing — 304 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Go Database Patterns

Production-grade database access patterns for Go. Covers connection management, query patterns, transactions, migrations, and testing.

How It Works

  1. Agent identifies the database need (setup, query, migration, optimization)
  2. Agent applies the appropriate pattern using the right abstraction level
  3. Agent ensures proper connection management, error handling, and resource cleanup
  4. Agent generates tests with appropriate mocking or containerized databases

Rules

1. Connection Management (Critical)

# Rule Description
CM1 Configure pool limits Set MaxOpenConns, MaxIdleConns, ConnMaxLifetime, ConnMaxIdleTime.
CM2 Always pass context Use QueryContext, ExecContext, PrepareContext — never the non-context variants.
CM3 Close rows Always defer rows.Close() immediately after Query().
CM4 Ping on startup Call db.PingContext(ctx) to verify the connection before serving traffic.
CM5 Use connection string builder Don't concatenate connection strings. Use the driver's config builder. 
func Connect(ctx context.Context, dsn string) (*sql.DB, error) {
    db, err := sql.Open("pgx", dsn)
    if err != nil {
        return nil, fmt.Errorf("opening database: %w", err)
    }

    // Connection pool settings
    db.SetMaxOpenConns(25)                 // Max concurrent connections
    db.SetMaxIdleConns(10)                 // Keep idle connections ready
    db.SetConnMaxLifetime(30 * time.Minute) // Recycle connections
    db.SetConnMaxIdleTime(5 * time.Minute)  // Close idle connections

    // Verify connection
    if err := db.PingContext(ctx); err != nil {
        db.Close()
        return nil, fmt.Errorf("pinging database: %w", err)
    }

    return db, nil
}

2. Repository Pattern (Critical)

# Rule Description
RP1 Define repository interface at the consumer The service package defines what it needs from the repository.
RP2 Accept context as first parameter Every repository method takes context.Context.
RP3 Return domain types, not DB types Map between sql.NullString and *string at the repository boundary.
RP4 Handle sql.ErrNoRows Map to a domain-specific ErrNotFound. Don't leak sql.ErrNoRows.
RP5 Use prepared statements for repeated queries db.PrepareContext() once, then reuse.

Read the full file on GitHub · 304 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2mo ago First seen · 304 lines · 87 tokens per session scan A 541e3a81f1c2

Subscribe to this mod's changes

database-patterns is a skill published in the GitHub repository daibang123a/golang-agent-skills (2 stars, last pushed 8mo ago), licensed MIT. It adds 87 tokens to every session and 2,589 once invoked, about $0.0003 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.

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database-patterns compared with skills from other repositories

database-patterns next to 6 skills from other repositories
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compilingapache/skywalking-banyandbSkill355yesterdayApache-2.0A31Claude Code
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sql-query-performancemakifbaysal/tasktrooperSkill12016d agoApache-2.0A35Claude Code, Codex