Build an app · 4 free picks
Plan: plan your app before you build
Without a plan, each feature is built on its own and every screen ends up different. The assistant can also go round in circles on one big task. These add-ons make it ask questions, write a plan and split the work into small steps.
Free picks (tested by us)
Most useful first. Each one was installed on a clean test system; start with the first, try it, then add the next.
Plan, test and check its own work
Superpowers
Makes the assistant ask questions, plan, test and check its own work.
Test: installs cleanly and works without an account. Not yet used on real work.
EveryoneWatch outIt changes how the agent works. It asks many questions and may start helper agents, which uses more of your usage limit.
For Claude Code Also works with Codex CLI and Gemini CLI — see all stepsType this inside Claude Code /plugin install superpowers@claude-plugins-official Save the plan of long tasks
Planning with Files
Keeps the plan and progress of a long task in notes, so the assistant does not lose its place.
Test: installs cleanly and works without an account. Not yet used on real work.
EveryoneWatch outIt writes three Markdown files into your project folder. Add them to .gitignore if you do not want them saved with your code.
For any assistantPaste this in the terminal npx skills add OthmanAdi/planning-with-files --skill planning-with-files -g Plan and review code changes
Feature Dev plugin (Anthropic)
Three helpers that look at your code, plan a change and check it before you accept it.
Test: installs cleanly and works without an account. Not yet used on real work.
Good forWeb developers, Build an appWatch outThe agents read your code and can edit files in the project. Use a project under version control.
For Claude CodeType this inside Claude Code /plugin install feature-dev@claude-plugins-official Good habits for building websites
Addy Osmani Agent Skills
Good working habits for building websites: clear plans, tests and reviews.
Test: installs cleanly and works without an account. Not yet used on real work.
EveryoneWatch outThe skills are text instructions, so the direct risk is low. The agent still runs commands that you approve.
For any assistantPaste this in the terminal npx skills add addyosmani/agent-skills