Update Plan
Validate and improve an implementation plan in plan mode by cross-checking with docs/design/*.md, docs/ROADMAP.md, docs/requirements.md, and src/. Superset of update-design. Use in plan mode whenever the user requests an implementation plan for zghalint - invoke at the start of plan mode so the verification runs before finalizing the plan file, and re-invoke just before ExitPlanMode if the plan has materially changed. Trigger examples - entering plan mode for any zghalint feature work, "プランを作成", "実装計画", "plan this feature", "validate the plan", "整合性チェック".
Security AStatic scan found no risk patternsHow grading works ›
From the source SKILL.md
プランモードで実装計画を完成させた直後、ユーザーに提示する直前に発動する統合検証・改善スキル。 update-design の全機能（設計書品質評価）を内包しつつ、ロードマップ・要件定義との横断的整合性チェックと、プラン自体の改善を行う。
What this skill does
Update Plan is a community-contributed Claude Code skill in the prd-spec sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/update-plan/ and loads when your prompt matches the skill's trigger.
Who uses this skill
The Update Plan Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 146,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
How to install
Free
Manual install (2 steps)
mkdir -p ~/.claude/skills/update-plan
curl -L https://claudskills.com/skills/update-plan/SKILL.md \
-o ~/.claude/skills/update-plan/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/update-plan/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/update-plan/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\update-plan\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Telegram
📱 Install from your phone or desktop Telegram
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
Pro
One-click install via the desktop app
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
Pro
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
Frequently asked questions
How do I install the Update Plan Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/update-plan/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Update Plan skill do?
Validate and improve an implementation plan in plan mode by cross-checking with docs/design/*.md, docs/ROADMAP.md, docs/requirements.md, and src/. Superset of update-design. Use in plan mode whenever the user requests an implementation plan for zghalint - invoke at the start of plan mode so the verification runs before finalizing the plan file, and re-invoke just before ExitPlanMode if the plan has materially changed. Trigger examples - entering plan mode for any zghalint feature work, "プランを作成", "実装計画", "plan this feature", "validate the plan", "整合性チェック".
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Update Plan skill?
Use Update Plan when your Claude Code task falls under the Product category — specifically in the prd spec area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Update Plan" or describe the task and let Claude pick). Browse related skills at
/category/product/.
What is a Claude Code skill and how does the Update Plan skill fit in?
A Claude Code skill is a
SKILL.md file that lives under
~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Update Plan is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at
/learn/what-is-a-claude-skill/.
Attribution & license
Cite this skill
If you reference this skill in a blog post, paper, or documentation, you can cite it as:
APA
watany-dev. (2026). Update Plan [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/update-plan/
BibTeX
@misc{update-plan-2026,
author = {watany-dev},
title = {Update Plan [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/update-plan/}
}Embed this skill
Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →
Badge
[](https://claudskills.com/skills/update-plan/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)
<script>
<script src="https://claudskills.com/embed/update-plan.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/update-plan.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Update Plan"></iframe>
Security scan
Grade A · scanned 2026-07-06 — free static scan against the OWASP Agentic Skills Top 10.
No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›
- ✓ Prompt injection
- ✓ Data exfiltration
- ✓ Supply chain
- ✓ Reverse shell
- ✓ Credentials
- ✓ Execution
- ✓ Filesystem
- ✓ Persistence
- ✓ Obfuscation
- ✓ Network
Show this grade on your repo (click to copy):
[](https://claudskills.com/skills/update-plan/#security)
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