dev-new-tool
End-to-end workflow for taking a new tool idea from research to working MVP. Use when the user has an idea for a CLI tool, library, or small project and wants to go from concept to initial implementation. Triggers on "I have an idea for a tool", "build a new CLI", "create a new project", "kickoff new tool", "I want to build", "let's build a new", "新しいツールを作りたい", "CLIを作る".
Best use case
dev-new-tool is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
End-to-end workflow for taking a new tool idea from research to working MVP. Use when the user has an idea for a CLI tool, library, or small project and wants to go from concept to initial implementation. Triggers on "I have an idea for a tool", "build a new CLI", "create a new project", "kickoff new tool", "I want to build", "let's build a new", "新しいツールを作りたい", "CLIを作る".
Teams using dev-new-tool should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/dev-new-tool/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How dev-new-tool Compares
| Feature / Agent | dev-new-tool | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
End-to-end workflow for taking a new tool idea from research to working MVP. Use when the user has an idea for a CLI tool, library, or small project and wants to go from concept to initial implementation. Triggers on "I have an idea for a tool", "build a new CLI", "create a new project", "kickoff new tool", "I want to build", "let's build a new", "新しいツールを作りたい", "CLIを作る".
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# New Tool Kickoff A structured workflow for turning a tool idea into a working MVP. Covers the full cycle: research existing solutions, brainstorm approach, write a plan, scaffold the project, build core features, and write documentation. ## When to Use - User says "I have an idea for a tool/CLI/library" - User wants to start a new project from scratch - User wants to research feasibility before building - Greenfield development of a focused tool or CLI ## Workflow ### Phase 1: Research (Stop point: get user approval before Phase 2) **Goal:** Understand the landscape before building. 1. **Clarify the idea**: Ask what problem the tool solves, who uses it, and what the core workflow looks like 2. **Search for existing tools**: Web search for similar tools, libraries, or CLIs 3. **Evaluate alternatives**: For each existing tool found: - What does it do well? - What gaps or limitations does it have? - Is it actively maintained? 4. **API/Integration research**: If the tool integrates with external services, research their APIs: - Authentication methods - Rate limits and pagination - Data models and available endpoints 5. **Present findings**: Summarize as a brief landscape overview: - Existing tools and their limitations - API capabilities (if applicable) - Recommended approach based on findings **Ask the user**: "Based on this research, should we proceed with building? Any adjustments to the concept?" ### Phase 2: Brainstorm & Design (Stop point: get user approval before Phase 3) **Goal:** Nail down the approach before writing code. 1. **Core features**: Identify the minimum set of features for a useful v1 2. **Technology choices**: Recommend language, frameworks, and key dependencies based on: - User's preferences and existing projects - Tool requirements (CLI, TUI, web, library) - Available ecosystem (Go for CLI tools, TypeScript for Node ecosystem, etc.) 3. **Interface design**: Define the user-facing interface: - CLI: command structure, flags, arguments - Library: public API surface - TUI: key bindings, views 4. **Architecture sketch**: High-level component breakdown (keep it simple — avoid over-engineering) 5. **Name the project**: Suggest a name if the user hasn't chosen one (or invoke the `project-namer` skill) **Ask the user**: "Here's the proposed design. What adjustments?" ### Phase 3: Plan **Goal:** Create an executable implementation plan. 1. Write a plan file to the repo (`.claude/plans/[project-name].md` or a location the user specifies) 2. The plan should include: - **Goal**: One-sentence summary - **Scope**: What's in v1, what's deferred - **Steps**: Numbered implementation steps with clear deliverables - **File structure**: Expected project layout - **Dependencies**: Key libraries to use - **Test strategy**: What to test and how 3. Keep the plan concise — under 100 lines. The plan is a contract, not a design doc. **Ask the user**: "Plan is ready. Proceed with implementation?" ### Phase 4: Scaffold & Build **Goal:** Get to a working MVP. 1. **Initialize project**: - Create directory structure - Initialize module/package (go mod init, npm init, etc.) - Set up linting and formatting config - Create .gitignore 2. **Implement core features**: Work through plan steps in order - Write tests alongside implementation (not after) - Commit at logical checkpoints - If a step gets complex, break it down further 3. **Verify**: Run the full test suite, lint, and build before moving on ### Phase 5: Polish & Document **Goal:** Make the tool usable by others. 1. **README**: Write a README with: - Clear description and tagline - Installation instructions - Quick start / usage examples - Configuration reference (if applicable) 2. **CLI help**: Ensure all commands have proper help text and examples 3. **License**: Add an appropriate license file (default: MIT unless user specifies) 4. **Final review**: Run a quick scan: - `go vet` / `eslint` / equivalent for the language - Check for hardcoded paths or secrets - Verify README matches actual CLI interface ## Adapting the Workflow - **If the user already researched**: Skip Phase 1, start at Phase 2 - **If the user has a plan**: Skip to Phase 4 - **If the user wants just research**: Stop after Phase 1 - **If adding to existing project**: Skip scaffolding in Phase 4, focus on the new feature ## Tips - Prefer simplicity in v1. The user can always add features later. - For CLI tools, the user prefers Go with cobra/viper patterns. - Always verify with web search before recommending libraries — check for maintenance status and compatibility. - Use conventional commits during implementation. - Don't over-engineer: no feature flags, no plugin systems, no config file formats beyond what's needed for v1. ## Examples **Example 1: CLI tool from idea** ``` User: "I want to build a CLI tool for Slack using Go" Action: 1. Research existing Slack CLI tools (slackcli, etc.) 2. Research Slack API capabilities 3. Brainstorm: core commands (messages, channels, search) 4. Plan: write implementation plan 5. Build: scaffold Go project, implement core commands 6. Document: write README with install + usage ``` **Example 2: Research only** ``` User: "I'm thinking of creating some linter. Research if there's anything similar." Action: 1. Search for existing linters in the relevant space 2. Compare features, limitations, maintenance status 3. Present findings and recommendation 4. Stop — wait for user to decide next steps ``` **Example 3: Tool with external API** ``` User: "I want to create a Fireflies CLI" Action: 1. Research Fireflies API docs, authentication, endpoints 2. Research existing Fireflies integrations 3. Design: core features (list meetings, get transcript, action items) 4. Plan and build with API client as foundation ```