Prompt Improver
severity1/claude-code-prompt-improver
This skill enriches vague prompts with targeted research and clarification before execution.
LLM 프롬프트의 품질을 체계적으로 평가하고 최적화하는 방법론. An agent skill from revfactory/harness-100.
$ npx skills add revfactory/harness-100 --skill prompt-optimizer -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install revfactory/harness-100 prompt-optimizer --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .claude/skills && cp -r skills-src/ko/41-llm-app-builder/.claude/skills/prompt-optimizer .claude/skills/prompt-optimizer && rm -rf skills-srcUse ~/.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/
Install the "prompt-optimizer" agent skill from https://github.com/revfactory/harness-100/tree/main/ko/41-llm-app-builder/.claude/skills/prompt-optimizer into .claude/skills/prompt-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-optimizer", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/revfactory/harness-100/tree/main/ko/41-llm-app-builder/.claude/skills/prompt-optimizerType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add revfactory/harness-100 --skill prompt-optimizer -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install revfactory/harness-100 prompt-optimizer --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .agents/skills && cp -r skills-src/ko/41-llm-app-builder/.claude/skills/prompt-optimizer .agents/skills/prompt-optimizer && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "prompt-optimizer" agent skill from https://github.com/revfactory/harness-100/tree/main/ko/41-llm-app-builder/.claude/skills/prompt-optimizer into .agents/skills/prompt-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-optimizer", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add revfactory/harness-100 --skill prompt-optimizer -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install revfactory/harness-100 prompt-optimizer --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/ko/41-llm-app-builder/.claude/skills/prompt-optimizer .cursor/skills/prompt-optimizer && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "prompt-optimizer" agent skill from https://github.com/revfactory/harness-100/tree/main/ko/41-llm-app-builder/.claude/skills/prompt-optimizer into .cursor/skills/prompt-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-optimizer", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/revfactory/harness-100.git --path ko/41-llm-app-builder/.claude/skills/prompt-optimizer--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add revfactory/harness-100 --skill prompt-optimizer -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install revfactory/harness-100 prompt-optimizer --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/ko/41-llm-app-builder/.claude/skills/prompt-optimizer .gemini/skills/prompt-optimizer && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "prompt-optimizer" agent skill from https://github.com/revfactory/harness-100/tree/main/ko/41-llm-app-builder/.claude/skills/prompt-optimizer into .gemini/skills/prompt-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-optimizer", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install revfactory/harness-100 prompt-optimizerInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add revfactory/harness-100 --skill prompt-optimizer -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .github/skills && cp -r skills-src/ko/41-llm-app-builder/.claude/skills/prompt-optimizer .github/skills/prompt-optimizer && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "prompt-optimizer" agent skill from https://github.com/revfactory/harness-100/tree/main/ko/41-llm-app-builder/.claude/skills/prompt-optimizer into .github/skills/prompt-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-optimizer", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add revfactory/harness-100 --skill prompt-optimizer -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install revfactory/harness-100 prompt-optimizer --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/ko/41-llm-app-builder/.claude/skills/prompt-optimizer .opencode/skills/prompt-optimizer && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "prompt-optimizer" agent skill from https://github.com/revfactory/harness-100/tree/main/ko/41-llm-app-builder/.claude/skills/prompt-optimizer into .opencode/skills/prompt-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-optimizer", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
prompt-optimizerLLM 프롬프트의 품질을 체계적으로 평가하고 최적화하는 방법론. An agent skill from revfactory/harness-100.
Prompt Optimizer is an agent skill from revfactory/harness-100. LLM 프롬프트의 품질을 체계적으로 평가하고 최적화하는 방법론. '프롬프트 최적화', '프롬프트 개선', '가드레일 설계', '프롬프트 디버깅', 'few-shot 최적화', '시스템 프롬프트 설계' 등 프롬프트 품질 향상 시 사용한다. 단, LLM 모델 파인튜닝, 모델 가중치 수정은 이 스킬의 범위가 아니다.
Its SKILL.md is about 720 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 AI & LLM Engineering, covering Prompt engineering. The licence is Apache-2.0.
5 steps, taken from the first numbered list in SKILL.md.
Read from SKILL.md and the folder at commit 8e8d35c. It shows what the files ask for, not the result of running them.
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.
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Prompt Optimizer loads about 724 tokens when it runs. Until then it costs about 48 tokens; SKILL.md has 323 words of instructions outside code blocks.
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.
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.
The full file from revfactory/harness-100 at commit 8e8d35c, republished under its Apache-2.0 licence (© revfactory). 323 words, ~724 tokens.
.claude/skills/prompt-optimizer/SKILL.md (or your agent's skills folder).prompt-engineer와 eval-specialist의 프롬프트 품질을 강화하는 스킬.
| 차원 | 설명 | 점수 기준 |
|---|---|---|
| Clarity (명확성) | 지시가 모호하지 않은가? | 5: 한 가지 해석만 가능 |
| Relevance (관련성) | 불필요한 정보가 없는가? | 5: 모든 문장이 목적에 기여 |
| Instructability (지시성) | 구체적 행동을 지시하는가? | 5: 단계별 행동 명시 |
| Structure (구조) | 논리적으로 조직되었는가? | 5: 역할→컨텍스트→작업→제약 순 |
| Precision (정밀성) | 출력 형식이 명확한가? | 5: 출력 스키마/예시 포함 |
총점: 25점 만점 → 20+ 우수, 15-19 양호, <15 개선 필요
## Role (역할)
당신은 [역할]입니다. [역할의 핵심 역량/전문성].
## Context (컨텍스트)
- 사용 환경: [어디서/어떻게 사용되는지]
- 사용자: [누가 사용하는지]
- 도메인 지식: [알아야 할 배경]
## Task (작업)
다음 단계로 작업을 수행하세요:
1. [단계 1]
2. [단계 2]
3. [단계 3]
## Format (출력 형식)
다음 형식으로 응답하세요:
```json
{ "field": "value" }
## Few-shot 예시 최적화 전략
### 예시 선택 기준
### 예시 배치 순서
쉬운 예시 → 보통 예시 → 어려운 예시
이유: LLM은 마지막 예시에 가장 강하게 영향받으므로, 어려운 케이스를 마지막에 배치하여 경계 처리를 강화
## 가드레일 패턴
### 환각 방지
### 탈옥 방지
### 출력 안전성
## 프롬프트 디버깅 체크리스트
문제: 원하는 출력이 나오지 않음
역할이 명확한가? → "당신은 X입니다" vs "X처럼 행동하세요"
작업이 단계별인가? → 한 문장 지시 → 번호 매긴 단계
출력 형식이 예시로 제시되었는가? → 텍스트 설명 → JSON/마크다운 예시
부정 지시를 긍정으로 바꿨는가? → "~하지 마세요" → "~하세요" (더 효과적)
길이 제약이 있는가? → "간결하게" → "3문장 이내로"
체인 오브 소트(CoT)가 필요한가? → "단계별로 생각하세요" 추가
온도/top_p가 적절한가?
→ 사실 기반: temp 0.10.3
→ 창의적: temp 0.71.0
## 프롬프트 A/B 테스트 프레임워크
```python
ab_test = {
"name": "시스템 프롬프트 v2 vs v3",
"variants": {
"A": "prompt_v2.txt",
"B": "prompt_v3.txt"
},
"test_cases": 50, # 최소 30개
"metrics": [
{"name": "정확도", "weight": 0.4},
{"name": "형식 준수", "weight": 0.3},
{"name": "응답 시간", "weight": 0.1},
{"name": "토큰 효율", "weight": 0.2}
],
"significance": 0.05 # p-value 기준
}| 기법 | 절감 효과 | 적용 |
|---|---|---|
| 불필요한 수식어 제거 | 10-20% | "매우 중요한" → 삭제 |
| 반복 지시 통합 | 15-25% | 중복 문장 병합 |
| XML/JSON 태그 사용 | 5-10% | 구조화로 설명 절감 |
| 변수 참조 | 20-30% | 긴 텍스트를 변수로 |
| 예시 압축 | 10-15% | 핵심만 남기기 |
© revfactory, 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
Just SKILL.md in ko/41-llm-app-builder/.claude/skills/prompt-optimizer of revfactory/harness-100.
Open the folder on GitHubat commit 8e8d35c
Prompt Optimizer 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Prompt Optimizer this skillrevfactory/harness-100 | 1.3k | — | ~724 | Automated safety check: Pass | Apache-2.0 | |
| Prompt Improverseverity1/claude-code-prompt-improver | 1.9k | 2 repos | ~1.7k | Automated safety check: Pass | MIT | |
| Prompt Engineering Patternsynulihao/AgentSkillOS | 617 | 14 repos | ~1.7k | Automated safety check: Pass | None | |
| Patch CreationPiebald-AI/tweakcc | 2.5k | — | ~1.6k | Automated safety check: Pass | MIT | |
| LLM Application DevMoizIbnYousaf/ai-agent-skills | 1.1k | 2 repos | ~1.3k | Automated safety check: Pass | MIT | |
| Senior Prompt Engineermaslennikov-ig/claude-code-orchestrator-kit | 259 | 4 repos | ~1.4k | Automated safety check: Pass | Custom licence |
severity1/claude-code-prompt-improver
This skill enriches vague prompts with targeted research and clarification before execution.
ynulihao/AgentSkillOS
Master advanced prompt engineering techniques to maximize LLM performance, reliability, and controllability in production.
Piebald-AI/tweakcc
Create and register new patches for tweakcc. An agent skill from Piebald-AI/tweakcc.
MoizIbnYousaf/ai-agent-skills
Building applications with Large Language Models - prompt engineering, RAG patterns, and LLM integration.
maslennikov-ig/claude-code-orchestrator-kit
Provides reference guides and Python scripts for prompt optimization, RAG evaluation, and agent orchestration when building or tuning LLM systems.
baskduf/FableCodex
Apply a Claude Fable 5 inspired operating style inside Codex.
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Reference for designing how an API reports failures: structured error codes, response shapes, client-friendly messages, an error catalog and retry or fallback advice.
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Walks a backend-dev agent through OWASP API Top 10 checks, authentication and authorization patterns, and defense code during API design.
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Methodology for systematically designing and generating CLI tool argument parser structures.
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Audience segmentation skill used by the analyst and curator agents.
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Audio storytelling skill used by the podcast scriptwriter and show note editor.
Categories
LLM 프롬프트의 품질을 체계적으로 평가하고 최적화하는 방법론. An agent skill from revfactory/harness-100. Prompt Optimizer is an agent skill from revfactory/harness-100. LLM 프롬프트의 품질을 체계적으로 평가하고 최적화하는 방법론.
Prompt Optimizer fits situations like: tasks that involve Prompt engineering.
Run `npx skills add revfactory/harness-100 --skill prompt-optimizer -a claude-code`. Or copy the skill folder (ko/41-llm-app-builder/.claude/skills/prompt-optimizer in revfactory/harness-100) into .claude/skills/prompt-optimizer in your project. Claude Code loads it when a task matches its description.
Run `npx skills add revfactory/harness-100 --skill prompt-optimizer -a codex`. Or copy the skill folder (ko/41-llm-app-builder/.claude/skills/prompt-optimizer in revfactory/harness-100) into .agents/skills/prompt-optimizer in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add revfactory/harness-100 --skill prompt-optimizer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/prompt-optimizer, .gemini/skills/prompt-optimizer, .github/skills/prompt-optimizer and .opencode/skills/prompt-optimizer in your project.
SKILL.md names no scripts, command-line tools or credentials: Prompt Optimizer is instructions for the agent only. Our summary lists: Python 3.
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.
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.
Prompt Optimizer 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.
About 724 tokens (SKILL.md is roughly 2.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
Skills that share tags, products or a category with Prompt Optimizer: Prompt Improver (severity1/claude-code-prompt-improver, 1.9k stars), Prompt Engineering Patterns (ynulihao/AgentSkillOS, 617 stars), Patch Creation (Piebald-AI/tweakcc, 2.5k stars) and LLM Application Dev (MoizIbnYousaf/ai-agent-skills, 1.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
revfactory (a GitHub user) maintains it in revfactory/harness-100, which has 1,290 GitHub stars. The repository holds 464 skills in this directory. The repository was last updated on March 22, 2026.
Source: revfactory/harness-100 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.