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Agent skill

Sdd Riper

by alibaba in alibaba/skill-up

SDD-RIPER workflow executor with phase gating. An agent skill from alibaba/skill-up.

Apache-2.0Auto-check passed

Install Sdd Riper

skills CLI
$ npx skills add alibaba/skill-up --skill sdd-riper -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install alibaba/skill-up sdd-riper --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/alibaba/skill-up.git skills-src && mkdir -p .claude/skills && cp -r skills-src/e2e/testdata/multi-turn-conversation .claude/skills/sdd-riper && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
sdd-riper
GitHub stars
1.2k
Token cost
~117 tokens
SKILL.md length
51 words
Files
6
Skills in repo
7
Repo updated
First seen
Licence
Apache-2.0

At a glance

SDD-RIPER workflow executor with phase gating. An agent skill from alibaba/skill-up.

  • Works in 5 steps: Research - Investigate requirements → Innovate - Design solutions → Plan - Create implementation plan → …
  • SKILL.md covers Phases and Phase Gate
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Sdd Riper is an agent skill from alibaba/skill-up. SDD-RIPER workflow executor with phase gating

Its SKILL.md is about 120 tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files (for example `README.md`, `evals/cases/multi-turn-refinement.yaml` and `evals/cases/phase-gate-skip-attempt.yaml`).

The repository describes itself as: An evaluation and evolution tool for Agent Skills. The licence is Apache-2.0.

Example prompts

  • “/sdd-riper”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Research - Investigate requirements
  2. Innovate - Design solutions
  3. Plan - Create implementation plan
  4. Execute - Implement code
  5. Review - Review and refine

What it can do on your machine

Read from SKILL.md and the folder at commit 0579a86. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Sdd Riper loads about 117 tokens when it runs. Until then it costs about 14 tokens; SKILL.md has 51 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~14
When it runs · the whole SKILL.md, loaded when a task matches
~117

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from alibaba/skill-up at commit 0579a86, republished under its Apache-2.0 licence (© alibaba). 51 words, ~117 tokens.

Download SKILL.mdSave it as .claude/skills/sdd-riper/SKILL.md (or your agent's skills folder). This skill also uses 5 other files; get the full folder from GitHub.
name
sdd-riper
description
SDD-RIPER workflow executor with phase gating
version
1.0.0

SDD-RIPER Skill

Executes SDD (Solution Design Document) workflow with strict phase gating.

Phases

  1. Research - Investigate requirements
  2. Innovate - Design solutions
  3. Plan - Create implementation plan
  4. Execute - Implement code
  5. Review - Review and refine

Phase Gate

Users cannot skip phases. Each phase must be completed before moving to the next.

© alibaba, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 5 other files in e2e/testdata/multi-turn-conversation of alibaba/skill-up.

  • SKILL.md
  • README.md
  • evals/cases/multi-turn-refinement.yaml
  • evals/cases/phase-gate-skip-attempt.yaml
  • evals/eval.yaml
  • evals/evals.json

Open the folder on GitHubat commit 0579a86

Compare with similar skills

Sdd Riper next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Sdd Riper compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Sdd Riper this skillalibaba/skill-up1.2k—~117Automated safety check: PassApache-2.0
Phase Gated Debuggingsickn33/agentic-awesome-skills47k2 repos~790Automated safety check: PassMIT
Phase Gate CheckDonchitos/Claude-Code-Game-Studios26k—~2.2kAutomated safety check: NotesMIT
Gate Testsvercel/next.js143k—~2.7kAutomated safety check: PassMIT
Gateplugin87/ux-ui-agent-skills1.6k—~532Automated safety check: PassMIT
Phased Plan Executorthedotmack/claude-mem99k—~508Automated safety check: PassApache-2.0

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Questions about Sdd Riper

What does Sdd Riper do?

SDD-RIPER workflow executor with phase gating. An agent skill from alibaba/skill-up. Sdd Riper is an agent skill from alibaba/skill-up.

How do I install Sdd Riper in Claude Code?

Run `npx skills add alibaba/skill-up --skill sdd-riper -a claude-code`. Or copy the skill folder (e2e/testdata/multi-turn-conversation in alibaba/skill-up) into .claude/skills/sdd-riper in your project. Claude Code loads it when a task matches its description.

How do I install Sdd Riper in Codex?

Run `npx skills add alibaba/skill-up --skill sdd-riper -a codex`. Or copy the skill folder (e2e/testdata/multi-turn-conversation in alibaba/skill-up) into .agents/skills/sdd-riper in your project. Codex loads it when a task matches its description.

Can I use Sdd Riper in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add alibaba/skill-up --skill sdd-riper -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sdd-riper, .gemini/skills/sdd-riper, .github/skills/sdd-riper and .opencode/skills/sdd-riper in your project.

What does Sdd Riper need to run?

SKILL.md names no scripts, command-line tools or credentials: Sdd Riper is instructions for the agent only.

Does Sdd Riper access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Sdd Riper safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Sdd Riper use?

Sdd Riper is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Sdd Riper use?

About 117 tokens (SKILL.md is roughly 468 characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Sdd Riper?

Skills that share tags, products or a category with Sdd Riper: Phase Gated Debugging (sickn33/agentic-awesome-skills, 47k stars), Phase Gate Check (Donchitos/Claude-Code-Game-Studios, 26k stars), Gate Tests (vercel/next.js, 143k stars) and Gate (plugin87/ux-ui-agent-skills, 1.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Sdd Riper?

alibaba (a GitHub organization) maintains it in alibaba/skill-up, which has 1,163 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 9, 2026.

Source: alibaba/skill-up on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.