H2database
H2 is an embeddable RDBMS written in Java.
Install / Use
/learn @h2database/H2databaseREADME
Welcome to H2, the Java SQL database.
The main features of H2 are:
- Very fast, open source, JDBC API
- Embedded and server modes; disk-based or in-memory databases
- Transaction support, multi-version concurrency
- Browser based Console application
- Encrypted databases
- Fulltext search
- Pure Java with small footprint: around 2.5 MB jar file size
- ODBC driver
More information: https://h2database.com
Downloads
Download latest version or add to pom.xml:
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>2.4.240</version>
</dependency>
Documentation
Support
- Issue tracker for bug reports and feature requests
- Mailing list / forum for questions about H2
- 'h2' tag on Stack Overflow for other questions (Hibernate with H2 etc.)
Related Skills
oracle
338.0kBest practices for using the oracle CLI (prompt + file bundling, engines, sessions, and file attachment patterns).
prose
338.0kOpenProse VM skill pack. Activate on any `prose` command, .prose files, or OpenProse mentions; orchestrates multi-agent workflows.
Command Development
83.4kThis skill should be used when the user asks to "create a slash command", "add a command", "write a custom command", "define command arguments", "use command frontmatter", "organize commands", "create command with file references", "interactive command", "use AskUserQuestion in command", or needs guidance on slash command structure, YAML frontmatter fields, dynamic arguments, bash execution in commands, user interaction patterns, or command development best practices for Claude Code.
Plugin Structure
83.4kThis skill should be used when the user asks to "create a plugin", "scaffold a plugin", "understand plugin structure", "organize plugin components", "set up plugin.json", "use ${CLAUDE_PLUGIN_ROOT}", "add commands/agents/skills/hooks", "configure auto-discovery", or needs guidance on plugin directory layout, manifest configuration, component organization, file naming conventions, or Claude Code plugin architecture best practices.

