Collaborative Planning | codex-collab | ClaudePluginHub

Skill

Collaborative Planning

From codex-collab

This skill should be used when the user wants to "plan with Codex", "create a plan", "draft implementation plan", "help me plan", "plan before implementing", "refine a plan", "review my plan idea", "Codexと計画を立てる", "実装計画を作成", "計画を立てたい", "計画を一緒に考えて", "実装方針を相談", "Codexと設計を練る", "計画だけ作りたい", "実装前に計画を立てたい", "計画をレビューしてほしい", or mentions creating/refining an implementation plan as the deliverable without proceeding to implementation. NOTE: This is for PLAN-ONLY workflows that produce a plan document as the deliverable. Do NOT use when the user wants implementation (use codex-collab instead). Do NOT use for adversarial design critique (use devils-advocate instead). Do NOT use for debugging (use strong-inference instead).

Install

$

npx claudepluginhub masup9/codex-collab --plugin codex-collab

Tool Access

This skill uses the workspace's default tool permissions.

Preview

Create and refine implementation plans through collaborative iteration between Claude and Codex. **Plans only — no implementation.**

Supporting Assets

references/plan-draft-guide.mdreferences/plan-review-prompt.md

SKILL.md

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Last CommitMar 11, 2026

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Collaborative Planning Skill

Create and refine implementation plans through collaborative iteration between Claude and Codex. Plans only — no implementation.

Overview

Collaborative Planning produces a polished implementation plan by:

Claude collects codebase context and drafts a plan based on the user's idea
Codex reviews the plan and provides structured feedback
Claude refines the plan based on feedback
Iterate until plan quality is sufficient

Key constraint: This skill NEVER starts implementation. The deliverable is always a plan document.

Comparison with Other Skills

Aspect	collab-planning	codex-collab	devils-advocate
Purpose	Create/refine plans only	Plan + implement + review	Stress-test a design
Implementation	Never	Yes (Claude or Codex)	No
Deliverable	Plan document (fixed template)	Implemented code	Verdict (APPROVE/CONDITIONAL/REJECT)
Claude's role	Context collection + draft	Implementation or review	Blue Team advocate
Codex's role	Plan review + improvement	Planning or implementation	Red Team critic
Use case	Pre-implementation planning	End-to-end task execution	Design validation

Prerequisites

The user has an idea, task, or feature to plan
Relevant codebase context is available
For Codex collaboration: Codex CLI available (codex exec) or MCP configured

Workflow Phases

Phase 1: Context Collection

Claude gathers information:

Read relevant files and architecture
Identify affected components
Understand constraints and dependencies
Clarify scope with user if needed

Phase 2: Draft Plan

Claude creates an initial plan using the fixed template:

Purpose, scope exclusions, work breakdown
Implementation steps, risks, verification, completion criteria

Phase 3: Codex Review

Codex reviews the plan and provides:

Quality assessment: good / needs-improvement / major-revision
Specific feedback on each section
Missing considerations or risks
Summary snapshot (decisions, open items, rejected ideas)

Phase 4: Iteration

Based on quality assessment:

good → Finalize and present to user
needs-improvement → Claude refines, re-submit to Codex
major-revision → Ask user for direction, then re-draft or conclude

Phase 5: Final Output

Present the polished plan in the fixed template format.

Settings (`.claude/codex-collab.local.md`)

collab_planning:
  max_iterations: 3          # Review improvement cycle limit
  user_confirm: on_important  # never | always | on_important

Existing settings (model, sandbox, language) are also respected.

Invoking the Skill

Use the /collab-planning command:

# Basic usage
/collab-planning Add pagination to the user list API

# With options
/collab-planning --max-iterations 5 Refactor authentication module

# Japanese
/collab-planning ユーザーリストAPIにページネーションを追加する計画を立てたい

References

Detailed templates in references/:

plan-draft-guide.md - Fixed template for plan documents
plan-review-prompt.md - Template for Codex review requests