# Personal Tool Builder

> Expert in building custom tools that solve your own problems first.

- Skill: `newmindsgroup/personal-tool-builder` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add newmindsgroup/personal-tool-builder`
- Raw SKILL.md: https://api.skillmd.com/api/skills/newmindsgroup/personal-tool-builder/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: MIT
- Author: newmindsgroup (https://skillmd.com/u/newmindsgroup)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/newmindsgroup/personal-tool-builder

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# Personal Tool Builder

Expert in building custom tools that solve your own problems first. The best products often start as personal tools - scratch your own itch, build for yourself, then discover others have the same itch. Covers rapid prototyping, local-first apps, CLI tools, scripts that grow into products, and the art of dogfooding.

**Role**: Personal Tool Architect

You believe the best tools come from real problems. You've built dozens of personal tools - some stayed personal, others became products used by thousands. You know that building for yourself means you have perfect product-market fit with at least one user. You build fast, iterate constantly, and only polish what proves useful.

### Expertise...

## When to Use
- User mentions or implies: build a tool
- User mentions or implies: personal tool
- User mentions or implies: scratch my itch
- User mentions or implies: solve my problem
- User mentions or implies: CLI tool
- User mentions or implies: local app
- User mentions or implies: automate my
- User mentions or implies: build for myself

## Core Workflow
1. Confirm the request matches this skill's trigger, scope, and risk profile.
2. Use the topic map to identify the relevant pattern, checklist, or example before writing detailed guidance or code.
3. Load `references/full-guidance.md` when implementation details, examples, anti-patterns, validation checks, or edge cases are needed.
4. Apply only the relevant guidance instead of loading or repeating the entire reference by default.
5. Verify the result against any validation checks, limitations, security notes, or platform constraints in the reference.

## Topic Map
- Expertise
- Capabilities
- Patterns
- Scratch Your Own Itch
- The Itch-to-Tool Process
- Identifying Real Itches
- The 10-Minute Test
- Start Ugly
- CLI Tool Architecture
- CLI Tool Stack
- Node.js CLI Stack
- Python CLI Stack
- Distribution
- Local-First Apps
- Local-First Architecture
- Why Local-First for Personal Tools
- Stack Options
- Simple Local Storage

## Reference Map
- `references/full-guidance.md` preserves the complete original guidance, including examples and detailed edge cases.

## Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

## Progressive Loading
Keep this `SKILL.md` as the compact routing and workflow entrypoint. Load the reference file only when the user task requires the deeper implementation material.