Skip to content llms.txt

Codex

OpenAI’s CLI agent with support for rules, skills, agents, MCP, hooks, and commands.

Provider Details

Detail	Value
Slug	`codex`
Config directory	`~/.codex`
Supported content types	Rules, Skills, Agents, MCP Configs, Hooks, Commands

Supported Content Types

Content Type	Supported	Install Method
Rules	Yes	Symlink
Skills	Yes	Symlink
Agents	Yes	Symlink
MCP Configs	Yes	JSON merge
Hooks	Yes	File-based
Commands	Yes	Symlink

File Format and Location

Content Type	Project Location	Global Location	Format
Rules	`AGENTS.md`	`~/.codex/`	Markdown
Skills	`.agents/skills/`	`~/.agents/skills/`	Markdown
Agents	`.codex/agents/`	`~/.codex/`	TOML
Hooks	`.codex/hooks.json`	`~/.codex/`	JSON
Commands	`.codex/commands/`	`~/.codex/`	Markdown

Discovery Paths

Content Type	Discovery Paths
Rules	`AGENTS.md`
Skills	`.agents/skills/`
Agents	`.codex/agents/`
Hooks	`.codex/hooks.json`
Commands	`.codex/commands/`

Format Notes

Codex uses TOML for agent configuration files, which is unique among providers. Syllago handles the conversion between TOML and other agent formats (Markdown, YAML) automatically. Rules and commands use standard Markdown.

Detection

Syllago detects Codex by checking for the ~/.codex directory or the codex command in PATH.

Working with Codex

# Add content from Codex
syllago add --from codex

# Install content to Codex
syllago install my-skill --to codex

See Also