Living Product Scope Planner
jsmastery-pro/skills
Turns a product idea into a coarse, ordered scope kept in docs/scope, then keeps it current: plan a product, plan the next slice, enroll one feature or reconcile after shipping.
HAR: Project init, tool setup, agent config, memory setup, skill mirror sync.
Install Harness Setup
$ npx skills add Chachamaru127/claude-code-harness --skill harness-setup -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Chachamaru127/claude-code-harness harness-setup --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/Chachamaru127/claude-code-harness.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/harness-setup .claude/skills/harness-setup && 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 "harness-setup" agent skill from https://github.com/Chachamaru127/claude-code-harness/tree/main/skills/harness-setup into .claude/skills/harness-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-setup", 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/Chachamaru127/claude-code-harness/tree/main/skills/harness-setupType 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 Chachamaru127/claude-code-harness --skill harness-setup -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Chachamaru127/claude-code-harness harness-setup --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Chachamaru127/claude-code-harness.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/harness-setup .agents/skills/harness-setup && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "harness-setup" agent skill from https://github.com/Chachamaru127/claude-code-harness/tree/main/skills/harness-setup into .agents/skills/harness-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-setup", 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 Chachamaru127/claude-code-harness --skill harness-setup -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Chachamaru127/claude-code-harness harness-setup --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Chachamaru127/claude-code-harness.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/harness-setup .cursor/skills/harness-setup && 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 "harness-setup" agent skill from https://github.com/Chachamaru127/claude-code-harness/tree/main/skills/harness-setup into .cursor/skills/harness-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-setup", 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/Chachamaru127/claude-code-harness.git --path skills/harness-setup--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 Chachamaru127/claude-code-harness --skill harness-setup -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Chachamaru127/claude-code-harness harness-setup --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Chachamaru127/claude-code-harness.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/harness-setup .gemini/skills/harness-setup && 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 "harness-setup" agent skill from https://github.com/Chachamaru127/claude-code-harness/tree/main/skills/harness-setup into .gemini/skills/harness-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-setup", 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 Chachamaru127/claude-code-harness harness-setupInstalls 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 Chachamaru127/claude-code-harness --skill harness-setup -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Chachamaru127/claude-code-harness.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/harness-setup .github/skills/harness-setup && 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 "harness-setup" agent skill from https://github.com/Chachamaru127/claude-code-harness/tree/main/skills/harness-setup into .github/skills/harness-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-setup", 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 Chachamaru127/claude-code-harness --skill harness-setup -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Chachamaru127/claude-code-harness harness-setup --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Chachamaru127/claude-code-harness.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/harness-setup .opencode/skills/harness-setup && 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 "harness-setup" agent skill from https://github.com/Chachamaru127/claude-code-harness/tree/main/skills/harness-setup into .opencode/skills/harness-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-setup", 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.
Facts
- Skill name
harness-setup- GitHub stars
- 3.2k
- Token cost
- ~1.4k tokens
- SKILL.md length
- 347 words
- Files
- 9 (incl. references)
- Skills in repo
- 25
- Repo updated
- First seen
- Licence
- MIT
At a glance
HAR: Project init, tool setup, agent config, memory setup, skill mirror sync.
- Works in 4 steps: ユーザーの目的に対応する Quick Reference 行を選ぶ。 → 該当する ${CLAUDE_SKILL_DIR}/references/*.md… → 参照ファイルの手順に従い、dry-run がある操作は dry-run… → …
- Tasks that involve Product roadmapping
- SKILL.md covers Quick Reference, Execution, Upstream Policy Anchors and Cursor 実装バックエンド導入, plus 2 more sections
- Calls claude, bash and codex
What it does
Harness Setup is an agent skill from Chachamaru127/claude-code-harness. HAR: Project init, tool setup, agent config, memory setup, skill mirror sync. Trigger: setup, init, new project, CI/Codex setup, harness-mem, mirror. Do NOT load for: implementation, review, release, planning.
Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files, including reference files (for example `references/ci.md`, `references/codex.md` and `references/cursor.md`).
It sits in Agent Workflows, covering Product roadmapping. The repository describes itself as: Claude Code Dedicated Development Harness - Achieving High-Quality Development Through an Autonomous Plan→Work→Review Cycle. The licence is MIT.
When your agent uses it
- Tasks that involve Product roadmapping
Example prompts
- “/harness-setup”
Requirements
- Pre-approved tools (allowed-tools): Read, Write, Edit, Grep, Glob, Bash
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- ユーザーの目的に対応する Quick Reference 行を選ぶ。
- 該当する ${CLAUDE_SKILL_DIR}/references/*.md を読む。
- 参照ファイルの手順に従い、dry-run がある操作は dry-run を先に実行する。
- setup 後は必要に応じて harness doctor、bash scripts/sync-skill-mirrors.sh --check、bash scripts/ci/check-consistency.sh で確認する。
What it can do on your machine
Read from SKILL.md and the folder at commit 2b2b748. 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:
ReadWriteEditGrepGlobBash
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
claudebashcodex
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
Harness Setup loads about 1.4k tokens when it runs, and up to ~6.3k if it reads all its reference files. Until then it costs about 56 tokens; SKILL.md has 347 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.
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: Read, Write, Edit, Grep, Glob, Bash
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 Chachamaru127/claude-code-harness at commit 2b2b748, republished under its MIT licence (© Chachamaru127). 347 words, ~1,423 tokens.
Download SKILL.mdSave it as
.claude/skills/harness-setup/SKILL.md (or your agent's skills folder). This skill also uses 8 other files; get the full folder from GitHub.- name
- harness-setup
- description
- HAR: Project init, tool setup, agent config, memory setup, skill mirror sync. Trigger: setup, init, new project, CI/Codex setup, harness-mem, mirror. Do NOT load for: implementation, review, release, planning.
- allowed-tools
- Read, Write, Edit, Grep, Glob, Bash
- description-en
- HAR: Project init, tool setup, agent config, memory setup, skill mirror sync. Trigger: setup, init, new project, CI/Codex setup, harness-mem, mirror. Do NOT…
- description-ja
- HAR:プロジェクト初期化・ツール設定・エージェント構成・メモリ設定・skill mirror 同期を担当。セットアップ、初期化、新規プロジェクト、CI/Codex CLI セットアップ、harness-mem、mirror で起動。実装・レビュー・リリース・プランニングには使わない。
- kind
- workflow
- purpose
- Initialize and repair Harness project configuration
- trigger
- setup, init, new project, CI/Codex setup, harness-mem, mirror
- shape
- workflow
- role
- generator
- pair
- harness-sync
- owner
- harness-core
- since
- 2026-05-05
Harness Setup
Harness の統合セットアップスキル。 以下の旧スキルを統合:
setup— 統合セットアップハブharness-init— プロジェクト初期化harness-update— Harness アップデートmaintenance— ファイル整理・クリーンアップ
Quick Reference
| サブコマンド | 動作 | 詳細 |
|---|---|---|
/harness-setup init | 新規プロジェクト初期化（CLAUDE.md + Plans.md + hooks + sync + doctor） | ${CLAUDE_SKILL_DIR}/references/init.md |
/harness-setup ci | CI/CD パイプライン設定 | ${CLAUDE_SKILL_DIR}/references/ci.md |
/harness-setup codex | Codex CLI インストール・設定 | ${CLAUDE_SKILL_DIR}/references/codex.md |
/harness-setup harness-mem | harness-mem 統合・メモリ設定 | ${CLAUDE_SKILL_DIR}/references/harness-mem.md |
/harness-setup mirrors | skills/ → 公開 mirror bundle 更新 | ${CLAUDE_SKILL_DIR}/references/mirrors-agents-localize.md |
/harness-setup agents | agents/ エージェント設定 | ${CLAUDE_SKILL_DIR}/references/mirrors-agents-localize.md |
/harness-setup localize | CLAUDE.md ルールのローカライズ | ${CLAUDE_SKILL_DIR}/references/mirrors-agents-localize.md |
| marketplace / update | Plugin install, update, dependency policy | ${CLAUDE_SKILL_DIR}/references/marketplace.md |
| maintenance | ファイル整理・クリーンアップ | ${CLAUDE_SKILL_DIR}/references/maintenance.md |
Built-in slash discovery (CC 2.1.108+):
/initのような built-in slash command も発見される。 Harness 固有の bootstrap が必要な時だけ/harness-setup initと使い分ける。
Claude Code setup guidance (CC 2.1.120+): MCP
alwaysLoad、${CLAUDE_EFFORT}、claude plugin prune、claude project purge、ANTHROPIC_BEDROCK_SERVICE_TIER、claude_code.skill_activated.invocation_trigger、 Windows PowerShell primary shell、forked skills / subagents の deferred tools はdocs/claude-code-setup-mcp-telemetry-provider.mdを正本として扱う。
Codex plugin workflows: Codex
/goalとPlans.mdを二重管理しない。 plugin-bundled hooks は opt-in、external agent import は ownership 明記、 MultiAgentV2 /agents.max_threads = 8は上限として扱い、 sticky environments / app-server artifacts は safe default を優先する。 Codex0.130.0stable のcodex remote-control、large thread pagination、 selected-environmentview_image、live app-server config refresh、 accurate turn diffs、plugin details bundled hooks、sharing discoverability controls はdocs/codex-plugin-workflows-policy.mdを正本として扱う。 詳細はdocs/codex-plugin-workflows-policy.mdと${CLAUDE_SKILL_DIR}/references/codex.mdを参照。
Execution
状態確認だけの依頼は read-only の診断で完了する。setup 依頼は対象、望む状態、合格条件を既存設定と照合し、明示された surface の変更を進める。 不足情報は設定や契約を読み取りで回収する。任意機能を追加したり、対象外の設定や保護された設定を目的から推測して変更したりしない。
- ユーザーの目的に対応する Quick Reference 行を選ぶ。
- 該当する
${CLAUDE_SKILL_DIR}/references/*.mdを読む。 - 参照ファイルの手順に従い、dry-run がある操作は dry-run を先に実行する。
- setup 後は必要に応じて
harness doctor、bash scripts/sync-skill-mirrors.sh --check、bash scripts/ci/check-consistency.shで確認する。
Upstream Policy Anchors
docs/plugin-managed-settings-policy.md— plugin managed settings policy; normal defaults must not inherit managed marketplace restrictions.docs/codex-provider-setup-policy.md— Codex provider setup policy, includingamazon-bedrockandmodel_provider = "amazon-bedrock"examples.- Codex
0.123.0以降の MCP diagnostics / plugin MCP loading guidance: use/mcp verboseanddocs/codex-mcp-diagnostics.mdfor diagnostics. - Codex sandbox / execution policy (0.123.0+): see
docs/codex-sandbox-execution-policy.mdforremote_sandbox_configand execution constraints.
Cursor 実装バックエンド導入
詳細手順は ${CLAUDE_SKILL_DIR}/references/cursor.md を読む。
契約アンカー: set-impl-backend.sh は AI 実行可。permissions.json、.cursorignore、*.cursor.sh allowlist はユーザー手動で、AI が編集できない protected path として扱う。
根拠ルールは .claude/rules/cursor-cli-only.md と docs/sandbox-allowlist-recipe.md。
Reference Index
${CLAUDE_SKILL_DIR}/references/init.md— init, Go binary verification, plugin sync, doctor.${CLAUDE_SKILL_DIR}/references/ci.md— GitHub Actions CI setup.${CLAUDE_SKILL_DIR}/references/codex.md— Codex CLI, provider/model metadata, app-server, MCP diagnostics, sandbox policy.${CLAUDE_SKILL_DIR}/references/cursor.md— Cursor implementation backend setup and boundaries.${CLAUDE_SKILL_DIR}/references/harness-mem.md— memory directory and template setup.${CLAUDE_SKILL_DIR}/references/mirrors-agents-localize.md— mirror sync, agent setup, localization.${CLAUDE_SKILL_DIR}/references/marketplace.md— plugin marketplace install/update and managed dependency policy.${CLAUDE_SKILL_DIR}/references/maintenance.md— cleanup commands and related skills.
関連スキル
harness-sync— 設定/Plans/git 状態の同期確認harness-work— 実装タスク実行harness-review— 品質レビューmaintenance— ファイル整理（統合済み）
© Chachamaru127, MIT. 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 8 other files (references) in skills/harness-setup of Chachamaru127/claude-code-harness.
- SKILL.md
- references/ci.md
- references/codex.md
- references/cursor.md
- references/harness-mem.md
- references/init.md
- references/maintenance.md
- references/marketplace.md
- references/mirrors-agents-localize.md
Open the folder on GitHubat commit 2b2b748
Compare with similar skills
Harness Setup 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 |
|---|---|---|---|---|---|---|
| Harness Setup this skillChachamaru127/claude-code-harness | 3.2k | — | ~1.4k | Automated safety check: Notes | MIT | |
| Living Product Scope Plannerjsmastery-pro/skills | 1.4k | — | ~2.8k | Automated safety check: Notes | MIT | |
| Product Strategistalirezarezvani/claude-skills | 28k | 2 repos | ~1.8k | Automated safety check: Pass | MIT | |
| Strategic Roadmap Planningdeanpeters/Product-Manager-Skills | 7.2k | 2 repos | ~4.7k | Automated safety check: Pass | Custom licence | |
| Walking Skeleton Roadmap Scopingprime-radiant-inc/iterative-development | 181 | — | ~1.7k | Automated safety check: Pass | Apache-2.0 | |
| AI Product Strategy InterviewerPrepLabsAI/InterviewMentor | 112 | — | ~4.5k | Automated safety check: Pass | MIT |
Similar skills
Product Strategist
alirezarezvani/claude-skills
OKR cascade toolkit for product leaders: generates aligned company-to-team OKRs from five strategy types and scores how well they line up.
Strategic Roadmap Planning
deanpeters/Product-Manager-Skills
Sequences prioritization, epic definition, and stakeholder alignment into a release plan that ladders up to business outcomes.
Walking Skeleton Roadmap Scoping
prime-radiant-inc/iterative-development
Turns extracted requirements into a roadmap by choosing a walking skeleton iteration with its first journey scenario and ordering the remaining work into follow-on iterations.
AI Product Strategy Interviewer
PrepLabsAI/InterviewMentor
A VP of Product interviewer that simulates a product strategy interview focused on AI-native products.
Product Planner
BuildGreatProducts/builder-os
Vision intake conversation followed by generation of three product documents — docs/product-vision.md (strategy and brand), docs/prd.md (technical spec for coding agents), and…
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Related
Questions about Harness Setup
What does Harness Setup do?
HAR: Project init, tool setup, agent config, memory setup, skill mirror sync. Harness Setup is an agent skill from Chachamaru127/claude-code-harness. HAR: Project init, tool setup, agent config, memory setup, skill mirror sync.
When should I use Harness Setup?
Harness Setup fits situations like: tasks that involve Product roadmapping.
How do I install Harness Setup in Claude Code?
Run `npx skills add Chachamaru127/claude-code-harness --skill harness-setup -a claude-code`. Or copy the skill folder (skills/harness-setup in Chachamaru127/claude-code-harness) into .claude/skills/harness-setup in your project. Claude Code loads it when a task matches its description.
How do I install Harness Setup in Codex?
Run `npx skills add Chachamaru127/claude-code-harness --skill harness-setup -a codex`. Or copy the skill folder (skills/harness-setup in Chachamaru127/claude-code-harness) into .agents/skills/harness-setup in your project. Codex loads it when a task matches its description.
Can I use Harness Setup 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 Chachamaru127/claude-code-harness --skill harness-setup -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/harness-setup, .gemini/skills/harness-setup, .github/skills/harness-setup and .opencode/skills/harness-setup in your project.
What does Harness Setup need to run?
Going by SKILL.md and its folder, Harness Setup needs the command-line tools its instructions call (claude, bash and codex). Its frontmatter pre-approves these tools: Read, Write, Edit, Grep, Glob, Bash.
Does Harness Setup 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 Harness Setup 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 Harness Setup use?
Harness Setup is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Harness Setup use?
About 1.4k tokens (SKILL.md is roughly 5.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 4.9k tokens, read only when the agent opens those files.
What are the alternatives to Harness Setup?
Skills that share tags, products or a category with Harness Setup: Living Product Scope Planner (jsmastery-pro/skills, 1.4k stars), Product Strategist (alirezarezvani/claude-skills, 28k stars), Strategic Roadmap Planning (deanpeters/Product-Manager-Skills, 7.2k stars) and Walking Skeleton Roadmap Scoping (prime-radiant-inc/iterative-development, 181 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Harness Setup?
Chachamaru127 (a GitHub user) maintains it in Chachamaru127/claude-code-harness, which has 3,153 GitHub stars. The repository holds 25 skills in this directory. The repository was last updated on October 5, 2026.
Source: Chachamaru127/claude-code-harness on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.