Agent skill

Sc Clean Room

by kylesnowschwartz in kylesnowschwartz/SimpleClaude

Clean-room reimplementation of a repository, library, API, protocol, or other software artifact.

No licenceAuto-check: notesDevelopment

Install Sc Clean Room

skills CLI
$ npx skills add kylesnowschwartz/SimpleClaude --skill sc-clean-room -a claude-code

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

GitHub CLI
$ gh skill install kylesnowschwartz/SimpleClaude sc-clean-room --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/kylesnowschwartz/SimpleClaude.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/sc-extras/skills/sc-clean-room .claude/skills/sc-clean-room && 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
sc-clean-room
GitHub stars
114
Token cost
~3.7k tokens
SKILL.md length
1,113 words
Files
1
Skills in repo
12
Repo updated
First seen
Licence
None found

At a glance

Clean-room reimplementation of a repository, library, API, protocol, or other software artifact.

  • Works in 7 steps: Resolve Target and Scope → Discovery (The Dirty Room) → Specify (The Wall) → …
  • Wants to create a functionally equivalent implementation of an existing artifact without copying its internal design
  • SKILL.md covers EXECUTION MODEL, Phase 0: Resolve Target and…, Phase 1: Discovery (The Dirty… and Phase 2: Specify (The Wall), plus 4 more sections
  • Calls git

What it does

Sc Clean Room is an agent skill from kylesnowschwartz/SimpleClaude. Clean-room reimplementation of a repository, library, API, protocol, or other software artifact. This skill SHOULD be used when the user wants to create a functionally equivalent implementation of an existing artifact without copying its internal design or expression. NOT for refactoring existing code.

Its SKILL.md is about 3.7k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Refactoring. The repository describes itself as: Practical minimalism for AI assisted programming with Claude Code.

When your agent uses it

  • Wants to create a functionally equivalent implementation of an existing artifact without copying its internal design
  • Tasks that involve Refactoring

Example prompts

  • “/sc-clean-room”

Requirements

  • Pre-approved tools (allowed-tools): Task, Read, Bash, Grep, Glob, AskUserQuestion, TodoWrite, WebSearch, WebFetch, Write, Edit

Workflow steps

7 steps, taken from the step headings in SKILL.md.

  1. Resolve Target and Scope
  2. Discovery (The Dirty Room)
  3. Specify (The Wall)
  4. Implement (The Clean Room)
  5. Verify (Functional Equivalence)
  6. Present Results
  7. User Choice

What it can do on your machine

Read from SKILL.md and the folder at commit abb293b. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Task
    • Read
    • Bash
    • Grep
    • Glob
    • AskUserQuestion
    • TodoWrite
    • WebSearch
    • WebFetch
    • Write

    …and 1 more on the same allowed-tools line.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • git

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

  • Network

    No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

    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

Sc Clean Room loads about 3.7k tokens when it runs. Until then it costs about 79 tokens; SKILL.md has 1,113 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~79
When it runs · the whole SKILL.md, loaded when a task matches
~3.7k

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: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Task, Read, Bash, Grep, Glob, AskUserQuestion, TodoWrite, WebSearch, WebFetch, Write, Edit

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 1,113 words (~3,747 tokens).

“A structured approach to reimplementing a software artifact without copying its internals. A discovery agent examines the original and writes a behavioral specification with fixtures. Then a separate implementation agent builds from that specification alone. Fixtures captured during discovery verify…”

— opening of SKILL.md by kylesnowschwartz
name
sc-clean-room
allowed-tools
Task, Read, Bash, Grep, Glob, AskUserQuestion, TodoWrite, WebSearch, WebFetch, Write, Edit
argument-hint
[target: repo URL, local path, or artifact name] [optional: scope or focus]

Read the full SKILL.md on GitHub

Files

Just SKILL.md in plugins/sc-extras/skills/sc-clean-room of kylesnowschwartz/SimpleClaude.

Open the folder on GitHubat commit abb293b

Compare with similar skills

Sc Clean Room 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.

Sc Clean Room compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Sc Clean Room this skillkylesnowschwartz/SimpleClaude114—~3.7kAutomated safety check: NotesNone
Guidelinesakash-network/node1.1k20 repos~577Automated safety check: PassMIT
Migrate Core Code to Submodulestinyhumansai/openhuman42k—~2.6kAutomated safety check: PassGPL-3.0
Component Refactoringlangflow-ai/langflow155k—~3.5kAutomated safety check: PassMIT
Ponytail Lazy Developer ModeDietrichGebert/ponytail160k1 repos~873Automated safety check: PassMIT
ast-grep Structural Searchcode-yeongyu/oh-my-openagent70k—~3.3kAutomated safety check: PassMIT

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Categories

Questions about Sc Clean Room

What does Sc Clean Room do?

Clean-room reimplementation of a repository, library, API, protocol, or other software artifact. Sc Clean Room is an agent skill from kylesnowschwartz/SimpleClaude. Clean-room reimplementation of a repository, library, API, protocol, or other software artifact.

When should I use Sc Clean Room?

Sc Clean Room fits situations like: wants to create a functionally equivalent implementation of an existing artifact without copying its internal design; tasks that involve Refactoring.

How do I install Sc Clean Room in Claude Code?

Run `npx skills add kylesnowschwartz/SimpleClaude --skill sc-clean-room -a claude-code`. Or copy the skill folder (plugins/sc-extras/skills/sc-clean-room in kylesnowschwartz/SimpleClaude) into .claude/skills/sc-clean-room in your project. Claude Code loads it when a task matches its description.

How do I install Sc Clean Room in Codex?

Run `npx skills add kylesnowschwartz/SimpleClaude --skill sc-clean-room -a codex`. Or copy the skill folder (plugins/sc-extras/skills/sc-clean-room in kylesnowschwartz/SimpleClaude) into .agents/skills/sc-clean-room in your project. Codex loads it when a task matches its description.

Can I use Sc Clean Room 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 kylesnowschwartz/SimpleClaude --skill sc-clean-room -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sc-clean-room, .gemini/skills/sc-clean-room, .github/skills/sc-clean-room and .opencode/skills/sc-clean-room in your project.

What does Sc Clean Room need to run?

Going by SKILL.md and its folder, Sc Clean Room needs the command-line tools its instructions call (git). Its frontmatter pre-approves these tools: Task, Read, Bash, Grep, Glob, AskUserQuestion, TodoWrite, WebSearch, WebFetch, Write, Edit.

Does Sc Clean Room access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Sc Clean Room safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Sc Clean Room use?

No licence was found for Sc Clean Room or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Sc Clean Room use?

About 3.7k tokens (SKILL.md is roughly 15k 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 Sc Clean Room?

Skills that share tags, products or a category with Sc Clean Room: Guidelines (akash-network/node, 1.1k stars), Migrate Core Code to Submodules (tinyhumansai/openhuman, 42k stars), Component Refactoring (langflow-ai/langflow, 155k stars) and Ponytail Lazy Developer Mode (DietrichGebert/ponytail, 160k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Sc Clean Room?

kylesnowschwartz (a GitHub user) maintains it in kylesnowschwartz/SimpleClaude, which has 114 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 10, 2026.

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