Agent Creator

Create Codex custom agents using the official custom agent TOML schema. Keep the file compatible with Codex by writing only supported top-level config keys, and put role boundaries, operating rules, and preferred skill dependencies inside developer_instructions.

Contract

Use this skill to create, update, or review one Codex custom subagent TOML file.

Do not use this skill for normal SKILL.md packages; redirect to skill-builder mid-task if this comes up during execution. Do not install skills, publish agents, or change global Codex settings unless the user explicitly asks.

Stop and ask when the target agent job, write location, destructive permission, or required credentials cannot be inferred safely.

Stop and ask when:

• The user requests sandbox_mode = "workspace-write" but the described agent responsibility is read-only or analytical — confirm intent before writing.
• Skill dependencies are requested but no skill identifiers are given and find-skills returns ambiguous candidates.

Input Contract

Resolve these inputs from the user request or nearby repository conventions: