gemini-command-development

Agent Building

Expert guide for creating custom Gemini CLI commands. Covers slash command definitions (.toml), argument parsing, and shell execution. Use when creating custom Gemini commands, defining TOML command files, adding command arguments, or building extension-based commands. Delegates to gemini-cli-docs.

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Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/development/gemini-command-development-melodic-software-claude-code-plugins/SKILL.md

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Gemini Command Development

🚨 MANDATORY: Invoke gemini-cli-docs First

STOP - Before providing ANY response about Gemini Commands:

INVOKE gemini-cli-docs skill

QUERY for the specific command topic

BASE all responses EXCLUSIVELY on official documentation loaded

Overview

Expert skill for defining custom slash commands in the Gemini CLI. Unlike Claude Code's markdown-based commands, Gemini uses TOML configuration or Extension-based commands.

When to Use This Skill

Keywords: gemini commands, custom slash commands, .toml commands, command arguments, command alias

Use this skill when:

Creating custom commands in commands.toml (or similar)
creating extension-based commands (<extension>/commands/*.toml)
Defining command arguments and defaults
Mapping commands to complex prompts

Command Structure (TOML)

Gemini commands are typically defined in TOML files within extensions or configuration.

[command-name]
description = "Description"
prompt = "The actual prompt to send..."

(Note: Verify exact syntax via gemini-cli-docs as specific implementation details vary by version)

Keyword Registry (Delegates to gemini-cli-docs)

Topic	Query Keywords
Definition	`custom commands toml`, `define slash command`
Arguments	`command arguments`, `command variables`
Scope	`workspace commands`, `global commands`

Quick Decision Tree

What do you want to do?

Create a Simple Alias -> Query gemini-cli-docs: "create custom command"
Package Command in Extension -> Query gemini-cli-docs: "extension commands structure"

Test Scenarios

Scenario 1: Create Custom Command

Query: "How do I create a custom slash command in Gemini CLI?" Expected Behavior:

Skill activates on "custom slash commands"
Delegates to gemini-cli-docs for TOML syntax Success Criteria: User receives TOML command definition example

Scenario 2: Extension Commands

Query: "How do I add commands to my Gemini extension?" Expected Behavior:

Skill activates on "extension commands"
Provides extension command structure Success Criteria: User receives extension commands path and format

Scenario 3: Command Arguments

Query: "How do I pass arguments to a Gemini command?" Expected Behavior:

Skill activates on "command arguments"
Delegates to docs for variable syntax Success Criteria: User receives argument handling pattern

References

Official Documentation: Query gemini-cli-docs for:

"custom commands"
"slash commands"

Version History

v1.1.0 (2025-12-01): Added Test Scenarios section
v1.0.0 (2025-11-25): Initial release