Codex Kit

Project-local Codex setup for serious multi-repository workspaces.

Codex Kit installs a curated Codex workspace layer with skills, agents, hooks, workflow rules, helper scripts, plan templates, output styles, and project documentation. It is designed for umbrella repositories that contain many child repos: keep the operational knowledge in the parent workspace, while Codex can still reason about and work across the child projects cleanly.

Why Use Codex Kit?

Most AI coding setups become messy in monorepos or workspace folders because each child repository starts accumulating its own plans, docs, scripts, and agent configuration. Codex Kit solves that by letting the umbrella folder act as the coordination layer.

• Keep plans, .codex/docs, .codex/scripts, rules, hooks, and templates in the selected top-level target instead of scattering files across child repos.
• Wrap child repositories from the parent workspace so Codex can work across the whole system without polluting every project.
• Choose the exact target at setup time: install into the umbrella folder, or intentionally install into a specific child project when that is what you want.
• Select skills, agents, hooks, and Python runtime from an interactive terminal UI.
• Auto-detect project signals and recommend relevant skills and agents.
• Pin a shared Python environment, such as ~/.venv/shared/bin/python, so Codex scripts do not accidentally use system Python.
• Install guardrails for privacy checks, scout blocking, development-rule reminders, plan/cook workflow reminders, and post-edit simplification.
• Preserve existing project conventions by writing managed sections instead of replacing user-owned content.

Install

npm install -g @manhnv319/codexkit

Check that the CLI is available:

ckit --help

Quick Start

From the umbrella folder that contains your repositories:

cd ~/Documents/projects/my-workspace
ckit

Running ckit with no arguments is equivalent to:

ckit --target .

By default, this opens the interactive selector. Use the arrow keys to move, Space to select/toggle, and Enter to apply.

Interactive Setup

The selector includes these tabs:

• Target: choose the umbrella folder or a detected child project.
• Python: choose auto or a detected Python interpreter.
• Skills: choose installed Codex skills.
• Agents: choose Codex agent roles.
• Hooks: choose runtime hooks and guardrails.
• Review: confirm the final setup before applying.

The Python tab scans common locations on macOS, Linux/Ubuntu, and Windows, including project .venv, ~/.venv, ~/.venv/shared, ~/.virtualenvs, ~/.pyenv/versions, Conda environments, Windows Python installs, and system fallbacks. The selected value is stored in .codex/.ck.json as python.runner.

Recommended Umbrella Setup

Use this when one folder contains multiple repositories and you want Codex workspace files to live only in the parent folder:

cd ~/Documents/projects/my-workspace
ckit

In the Target tab, keep . selected. This installs Codex Kit into the current workspace folder. Plans, docs, scripts, rules, hooks, and templates stay in that selected target.

Use this mode when you want a clean child-repo structure with no extra kit files inside each application/service repository.

Preview Changes

ckit --target . --dry-run --details

This prints detected project signals, recommendations, selected skills/agents, selected hooks, the Python runner, and planned file actions without writing anything.

Apply Without the Selector

ckit --target . --yes

Pin a shared Python interpreter:

ckit --target . --python ~/.venv/shared/bin/python --yes

Use auto-detection explicitly:

ckit --target . --python auto --yes

Child-Project Installs

If you intentionally want to install Codex Kit into a child repository, choose that child project in the Target tab or pass it directly:

ckit --target ./backend-service

This is useful when a child repository is worked on independently and should own its own .codex, .agents, plans, and AGENTS.md setup.

Batch Mode

Preview detected child repositories:

ckit --all-projects --dry-run --details

Apply to detected child repositories:

ckit --all-projects --yes

Batch mode is intentionally different from the recommended umbrella setup. It installs .codex and .agents configuration into each detected child project. Use it only when you actually want child repositories to receive their own kit files.

Profiles

ckit --target . --profile default
ckit --target . --profile minimal --yes
ckit --target . --profile all --yes

• default: core kit plus project-specific recommendations.
• minimal: smaller setup with essential workflow skills and guardrails.
• all: install every available migrated skill, agent, and hook.
• custom: start from explicit selections passed through CLI flags.

Example custom setup:

ckit --target . \
  --profile custom \
  --with-recommended \
  --skills react-best-practices,tanstack,backend-development \
  --agents planner,tester,code_reviewer \
  --hooks privacy,scout,dev-rules \
  --python ~/.venv/shared/bin/python \
  --yes

Useful Commands

ckit --list
ckit --target . --suggest-only
ckit --target . --dry-run --details
ckit --target . --repair-hook-wrappers

What It Installs

• .agents/skills
• .agents/skills support files such as common/, install.sh, and INSTALLATION.md
• .codex/agents
• .codex/hooks
• .codex/rules
• .codex/scripts
• .codex/output-styles
• .codex/docs
• .codex/.ck.json
• .codex/config.toml
• .codex/hooks.json
• plans/templates
• a managed Codex Kit block in AGENTS.md

Configuration Highlights

Codex Kit stores project preferences in .codex/.ck.json, including:

• paths.plans: where plan directories and reports should be created.
• paths.docs: where docs should be maintained.
• python.runner: selected Python interpreter or auto.
• hooks: enabled/disabled hook preferences.
• plan: naming, report, and validation behavior.

Notes

Use ckit --target . for the clean umbrella-repo workflow. Use ckit --all-projects only when you intentionally want to apply the kit to detected child repos.

After applying Codex Kit, restart Codex in the target workspace so the new skills, agents, hooks, and rules are loaded.

License

MIT License. See LICENSE for details.