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Create or revise native Codex custom subagent TOML with a narrow role, clear delegation contract, and intentional runtime controls. Use when adding repository or user agents for specialized parallel work.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Start here for the nddev-builder toolkit. Indexes the Codex artifact families and the creator, checker, reviewer, and workflow skill that owns each, points at the single reference for schemas and current (Beta, experimental, or under-development) surfaces, and routes the task to the right skill. Use first whenever building, checking, reviewing, or releasing a Codex artifact, or when unsure which builder skill applies.
A guided first run of the nddev-builder toolkit — from zero to a working, checked Codex artifact in ordered steps. Use when new to nddev-builder, onboarding, or unsure which builder skill to start with.
Create or revise a Codex marketplace catalog with valid plugin sources, categories, installation policy, and authentication policy. Use when publishing local or remote plugin collections.
Check a managed Codex requirements.toml layer for supported keys, permission-profile consistency, and a valid lower-layer default. Use before delivering managed /etc/codex or MDM requirements.
Create a managed Codex requirements.toml layer that constrains permission profiles and other admin policy. Use when authoring the /etc/codex or MDM-delivered managed requirements a lower config layer must satisfy.
Install and iterate on a Codex plugin locally in developer mode: the install, reinstall, and cachebuster test loop for a plugin under development, run against an isolated install and never live state. Use when running or iterating on a plugin, its skills, MCP, hooks, or bundled app locally.
| name | codex-agent-creator |
| description | Create or revise native Codex custom subagent TOML with a narrow role, clear delegation contract, and intentional runtime controls. Use when adding repository or user agents for specialized parallel work. |
Resolve every ../../scripts and ../../references path relative to this SKILL.md directory, never the caller working directory.
Create a standalone custom agent whose scope and authority are obvious to both the parent agent and reviewers.
Define the role, delegation triggers, expected report, read/write scope, and risks.
Read ../../references/codex-artifact-contracts.md for current locations and supported TOML keys.
Inspect options and generate a starting file:
python3 ../../scripts/create_codex_artifact.py agent --help
python3 ../../scripts/create_codex_artifact.py agent --output .codex/agents --name reviewer --description "Review bounded changes and report evidence"
Write a unique name, a delegation-oriented description, and self-contained developer instructions.
Select model, reasoning, sandbox, skills, and MCP overrides only when the role needs them; otherwise inherit stable defaults.
Keep agents under repository .codex/agents/ or CODEX_HOME/agents/. Custom agents are standalone TOML and are not bundled inside a plugin.
Validate:
python3 ../../scripts/check_codex_artifact.py agent .codex/agents/reviewer.toml
Delegate one bounded sample task and confirm the report is concise, evidence-backed, and within scope.