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.
npx skills add jiushiwon/wg-skills --skill database-skillgit clone --depth 1 https://github.com/jiushiwon/wg-skillsWrote 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.
[](https://agentmods.dev/skills/jiushiwon/wg-skills/database-skill)<a href="https://agentmods.dev/skills/jiushiwon/wg-skills/database-skill"><img src="https://agentmods.dev/badge/skills/jiushiwon/wg-skills/database-skill/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.
<a href="https://agentmods.dev/skills/jiushiwon/wg-skills/database-skill"><img src="https://agentmods.dev/badge/skills/jiushiwon/wg-skills/database-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00000 | $0.00848 |
| Opus 5 | $0.00000 | $0.00424 |
| Sonnet 5 | $0.00000 | $0.00170 |
| Haiku 4.5 | $0.00000 | $0.00085 |
Grade A, and why
database-skill 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 9d 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.
What it actually says
Database Skill
为后端生成流程提供数据库选型、表前缀、初始 schema 与迁移规范。被 select 与 4 个后端 skill 引用。
选型
| 数据特征 | 推荐 | 备注 |
|---|---|---|
| 强关系、事务 | PostgreSQL | 默认首选 |
| 团队熟 MySQL | MySQL 8 | 兼容现有团队 |
| 文档、灵活模式 | MongoDB | 仅 Node / Python 栈自动生成；Java / Go 不生成 MongoDB |
| 时序 / 日志 | TimescaleDB / InfluxDB | 仅用户明确要求时推荐 |
表前缀
默认 wg（如 wg_user），snake_case；写入 spec.md，落到 entity / migration 名。用户可覆盖。
初始 schema
按核心实体给最小建表/建集合：主键、created_at / updated_at、deleted_at（软删除）、必要唯一索引。关系型用 snake_case 字段，MongoDB 用 camelCase。
交付物落点
本 skill 不生成独立文件，决策结果必须落到两处：
- spec.md（选型期）：DB 类型、表前缀、核心实体清单、是否需要迁移工具。
- 生成项目内（生成期）：连接变量按 backend-convention-skill
env-config-guide.md写入.env.example；库名/前缀/迁移方式写入docs/project-guide.md的数据库与拓展段；DDL/迁移文件由后端 skill 按本 skill 规范现场生成。
迁移规范
生产必须显式迁移，迁移文件入库且可回滚。各栈工具：
| 栈 | 工具 | 关键配置 |
|---|---|---|
| Java | Flyway / Liquibase | ddl-auto: validate |
| Python | Alembic | 已含在依赖 |
| Node | TypeORM CLI | 生产关 synchronize |
| Go | golang-migrate / goose | 开发可 AutoMigrate |
详见 references/migration-guide.md。
连接覆盖（稳定事实，不腐烂）
| 项 | PostgreSQL | MySQL | MongoDB |
|---|---|---|---|
| 端口 | 5432 | 3306 | 27017 |
| DB_USER | postgres | app（官方镜像禁 root 作 MYSQL_USER） | - |
| DB_TYPE | postgres / postgresql | mysql（Python 用 mysql+pymysql） |
- |
| 镜像 | postgres:<ver>-alpine |
mysql:<ver> |
mongo:<ver> |
| DB_URL | built from host/port/name | jdbc:mysql://host:3306/<db> |
mongodb://host:27017/<db> |
生成 MySQL 项目时用 docker-compose.mysql.yml 改名为 docker-compose.yml。
版本获取
镜像版本查官方源：Docker Hub 官方标签页或 https://endoflife.date/api/{postgresql,mysql,mongodb}.json。不写死版本号；实际值写入生成项目的 versions.md。
不做
- 不在本 skill 写业务接口。
- 不替 Java / Go 生成 MongoDB。
- 不替用户提交。
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.
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.
- 9d ago First seen · 67 lines · 0 tokens per session scan A d03f8ecceefd
database-skill is a skill published in the GitHub repository jiushiwon/wg-skills (97 stars, last pushed yesterday), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 848 tokens. 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 2026-08-30.
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