Preplanning
Use when breaking down an epic into user stories, story splitting, backlog grooming, defining acceptance criteria, or auditing and reconciling existing epic children before implementation. Dispatches an opus `dso:story-decomposer` sub-agent to draft prioritized vertical-slice user stories with measurable done definitions tied to epic Success Criteria (never inline), identifies dependencies, runs an adversarial red-team review pass, dispatches a UI designer for UI stories, and writes the story tickets to the tracker. Trigger phrases include 'break down this epic', 'split into stories', 'story splitting', 'backlog grooming', 'write user stories', 'define acceptance criteria', 'plan the epic', 'decompose the epic', 'reconcile epic children'.
Security AStatic scan found no risk patternsHow grading works ›
From the source SKILL.md
<SUB-AGENT-GUARD> Requires Agent tool. If running as a sub-agent (Agent tool unavailable), STOP and return: "ERROR: /dso:preplanning requires Agent tool; invoke from orchestrator." </SUB-AGENT-GUARD>
What this skill does
Preplanning is a community-contributed Claude Code skill in the red-team sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/preplanning/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when breaking down an epic into user stories, story splitting, backlog grooming, defining acceptance criteria, or auditing and reconciling existing epic children before implementation. Dispatches an opus `dso:story-decomposer` sub-agent to draft prioritized vertical-slice user stories with measurable done definitions tied to epic Success Criteria (never inline), identifies dependencies, runs an adversarial red-team review pass, dispatches a UI designer for UI stories, and writes the story tickets to the tracker.
Who uses this skill
The Preplanning Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ 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/preplanning
curl -L https://claudskills.com/skills/preplanning/SKILL.md \
-o ~/.claude/skills/preplanning/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/preplanning/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/preplanning/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\preplanning\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 Preplanning Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/preplanning/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Preplanning skill do?
Use when breaking down an epic into user stories, story splitting, backlog grooming, defining acceptance criteria, or auditing and reconciling existing epic children before implementation. Dispatches an opus `dso:story-decomposer` sub-agent to draft prioritized vertical-slice user stories with measurable done definitions tied to epic Success Criteria (never inline), identifies dependencies, runs an adversarial red-team review pass, dispatches a UI designer for UI stories, and writes the story tickets to the tracker. Trigger phrases include 'break down this epic', 'split into stories', 'story splitting', 'backlog grooming', 'write user stories', 'define acceptance criteria', 'plan the epic', 'decompose the epic', 'reconcile epic children'.
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 Preplanning skill?
Use Preplanning when your Claude Code task falls under the Security category — specifically in the red team 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 Preplanning" or describe the task and let Claude pick). Browse related skills at
/category/security/.
What is a Claude Code skill and how does the Preplanning 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. Preplanning is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security 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
navapbc. (2026). Preplanning [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/preplanning/
BibTeX
@misc{preplanning-2026,
author = {navapbc},
title = {Preplanning [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/preplanning/}
}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/preplanning/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)
<script>
<script src="https://claudskills.com/embed/preplanning.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/preplanning.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Preplanning"></iframe>
Security scan
Grade A · scanned 2026-09-28 — 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/preplanning/#security)
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