Riper
RIPER methodology orchestrator — Research → Innovate → Plan → Execute → Review — the FOURTH instance of the AD/AID-PDLC sub-cycle contract (ADR-010 / RFC-018). Drives a bug / scoped change / investigation in an EXISTING active system through five modes, MAIN-SESSION-orchestrated (hook-gate=No → no dispatched master, no hook), with a mandatory independent C4 verifier at every mode gate and — uniquely — a dedicated C4+C6 on the non-freezable Research product (a Research NOTE + an `## Pinned revision` EVID + a Plan-gate pin-freshness re-check): RIPER is the first instance to exercise ADR-010's conditional-freeze path end-to-end. Each phase delegates to existing fpl-skills (/research, /refine or /fpf-decompose, /rfc create, /sprint or /forge-cycle, /audit) with explicit phase tracking. **MCP-first per PRD-022 Tier A** — forgeplan artifact creation uses `mcp__forgeplan__forgeplan_new` + `_link` + `_validate` when MCP is available; CLI fallback (`bash forgeplan ...`) only when MCP server not connected. Triggers (EN/RU) — "riper", "research innovate plan execute review", "/riper", "пройди riper", "RIPER цикл", "production bug", "investigate before fixing".
Security AStatic scan found no risk patternsHow grading works ›
From the source SKILL.md
Walks a task through the five RIPER phases — Research → Innovate → Plan → Execute → Review — by delegating to the right existing fpl-skill at each phase, with explicit progress tracking. RIPER is not a separate engine; it's a vocabulary overlay on top of skills you already have.
What this skill does
Riper is a community-contributed Claude Code skill in the science-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/riper/ and loads when your prompt matches the skill's trigger.
Who uses this skill
The Riper Claude Code skill is built for researchers, data scientists, academics, and analysts working with complex data and scientific literature. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 213,000+ 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/riper
curl -L https://claudskills.com/skills/riper/SKILL.md \
-o ~/.claude/skills/riper/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/riper/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/riper/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\riper\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 Riper Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/riper/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Riper skill do?
RIPER methodology orchestrator — Research → Innovate → Plan → Execute → Review — the FOURTH instance of the AD/AID-PDLC sub-cycle contract (ADR-010 / RFC-018). Drives a bug / scoped change / investigation in an EXISTING active system through five modes, MAIN-SESSION-orchestrated (hook-gate=No → no dispatched master, no hook), with a mandatory independent C4 verifier at every mode gate and — uniquely — a dedicated C4+C6 on the non-freezable Research product (a Research NOTE + an `## Pinned revision` EVID + a Plan-gate pin-freshness re-check): RIPER is the first instance to exercise ADR-010's conditional-freeze path end-to-end. Each phase delegates to existing fpl-skills (/research, /refine or /fpf-decompose, /rfc create, /sprint or /forge-cycle, /audit) with explicit phase tracking. **MCP-first per PRD-022 Tier A** — forgeplan artifact creation uses `mcp__forgeplan__forgeplan_new` + `_link` + `_validate` when MCP is available; CLI fallback (`bash forgeplan ...`) only when MCP server not connected. Triggers (EN/RU) — "riper", "research innovate plan execute review", "/riper", "пройди riper", "RIPER цикл", "production bug", "investigate before fixing".
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 Riper skill?
Use Riper when your Claude Code task falls under the Science & Research category — specifically in the science misc 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 Riper" or describe the task and let Claude pick). Browse related skills at
/category/science/.
What is a Claude Code skill and how does the Riper 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. Riper is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Science & Research 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
ForgePlan. (2026). Riper [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/riper/
BibTeX
@misc{riper-2026,
author = {ForgePlan},
title = {Riper [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/riper/}
}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/riper/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)
<script>
<script src="https://claudskills.com/embed/riper.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/riper.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Riper"></iframe>
Security scan
Grade A · scanned 2026-11-01 — free static scan against the OWASP Agentic Skills Top 10.
The scan flagged 1 of 10 categories (filesystem), including lower-severity patterns. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.
- ✓ 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/riper/#security)
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