plan-quick

A planning aid for turning a feature, refactor, or complex bug report into clarified requirements, risks, options, and implementation phases.

In plain words
What is it for?
Use it to plan new features, refactors, difficult bug fixes, database or API changes, and checks for the impact of renaming a symbol or changing a contract.
Why use it?
It exposes dependencies, trade-offs, and risky changes before code is written, and waits for user approval where the change needs it.

Skill for Claude CodeCodex

Part of the dev-kit plugin — 6 skills shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/jeonje/claude-plugins/plan-quick
Any agent
npx skills add JeonJe/claude-plugins --skill plan-quick
Clone the repo
git clone --depth 1 https://github.com/JeonJe/claude-plugins

Made for: Claude Code, Codex.

Or install dev-kit, the plugin that ships this one along with the rest of its 6 skills.

Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,556 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00060 $0.01556
Opus 5 $0.00030 $0.00778
Sonnet 5 $0.00012 $0.00311
Haiku 4.5 $0.00006 $0.00156

Measured 2d ago against content hash 443b1c9610a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

plan-quick scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/dev-kit/skills/plan-quick/SKILL.md · 136 lines

How it starts

The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plan Command

구현 전 계획 수립. 코드 작성 전 사용자 승인 대기 (승인 없이 진입 시 의도와 다른 결과 위험).

Use Cases

1. 신규 기능 계획

  • Input: "/plan 실시간 알림 기능 추가"
  • Action: 요구사항 재정의 → 리스크 분석 → Phase별 계획 → 사용자 확인 대기
  • Output: 구조화된 구현 계획 + 리스크 + 복잡도 평가

2. 리팩토링 계획

  • Input: "/plan 인증 시스템 리팩토링"
  • Action: 현재 코드 분석 → 의존성 파악 → 단계별 마이그레이션 계획
  • Output: 안전한 마이그레이션 로드맵 + 롤백 전략

3. 복잡한 버그 수정

  • Input: "/plan 결제 동시성 이슈 해결"
  • Action: 원인 분석 → 해결 옵션 2-3개 → 트레이드오프 비교
  • Output: 옵션별 장단점 + 추천 방안
  • (조건부) How tree: 실질 대안이 2개 이상이면 문제 → 접근 갈래 → 구체안으로 대안을 생성하고(떠오른 것 나열 X) 같은 레벨끼리 비교한다. 선택지 하나뿐이면 생략. 비교표는 Risk Gate Output의 Options 블록에 채운다.

4. Risky change gate

  • Input: "/plan DB schema 변경", "/plan public API 수정", auth/security/payment/production/3+파일 변경
  • Action: 근거 수집 → 영향 범위 확인 → 승인 필요한 계획으로 정리 → 코드 작성 금지
  • Output: approval-ready plan + impact/risk/verification

5. Impact check

  • Input: "/plan 이 API 변경 영향 봐줘", "/plan symbol rename 영향 확인"
  • Action: 변경 계약(symbol/endpoint/schema/env/config/DTO/route) 식별 → 참조·테스트·문서·FE/BE 영향 확인
  • Output: CLEAR/WATCH/BLOCK verdict + 근거

How It Works

계획 수행자(본 세션 인라인, 또는 워크스페이스에 planner 에이전트가 있으면 그것)는 다음을 수행한다:

  1. Analyze the request — 요구사항을 명확히 재정의
  2. Break down into phases — 실행 가능한 단계로 분해 (접근이 갈리면 phases를 How tree(문제 → 접근 갈래 → 구체안) 형태로 분해해 갈래별 단계를 비교)
  3. Identify dependencies — 컴포넌트 간 의존성 파악
  4. Assess risks — 잠재 블로커와 리스크 평가
  5. Estimate complexity & duration — High/Medium/Low + Phase별 구현/테스트 예상 소요와 근거(참조 구현 크기, 변경 파일 수, 미지수 개수). 근거 없는 숫자는 예상이 아니라 희망이다
  6. Present the plan — "WAITING FOR CONFIRMATION" 표시 후 사용자 명시적 승인 대기
  7. Gate risky changes — DB/auth/security/API/payment/production/3+ files require explicit approval before edits
  8. Check impact — for public contracts, list references, affected tests/docs, FE/BE or cross-repo impact

Confirmation Protocol

  • 승인: yes / proceed / 긍정 응답 → 구현 시작
  • 수정 요청:
    • modify: [변경사항]
    • different approach: [대안]
    • skip phase 2 and do phase 3 first

사용자가 명시적으로 승인하기 전에는 코드 변경/파일 작성 금지. 이유는 계획 단계의 잘못된 가정이 코드에 박히면 되돌리기 비용이 크기 때문. 위험 작업(DB schema, auth/security, public API, payment, production config, 3+ files, 2+ repos)은 반드시 계획 단계에서 멈춘다. 구현은 승인 후 별도 단계에서만 진행한다.

Read the full file on GitHub · 136 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 136 lines · 60 tokens per session scan A 443b1c9610a9

Subscribe to this mod's changes

plan-quick is a skill published in the GitHub repository JeonJe/claude-plugins (3 stars, last pushed 28d ago), licensed MIT. It adds 60 tokens to every session and 1,556 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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