Doubt Driven Development

Doubt Driven Development is a skill for test-first and verified development, published by addyosmani in the agent-skills repository. It is instructions only.

Instructions OnlyNeeds CredentialsThird-Party

View Source on GitHub

Third-party skill. Review the source before installing.

Install in 30 Seconds

Claude Code

Copy the skill folder into .claude/skills/doubt-driven-development/ in your project, or ~/.claude/skills/doubt-driven-development/ for all projects.

Codex

Copy the skill folder into .agents/skills/doubt-driven-development/ in your repo, or ~/.agents/skills/doubt-driven-development/ for personal use.

Gemini CLI

Copy the skill folder into .gemini/skills/doubt-driven-development/ or .agents/skills/doubt-driven-development/, or install from Git with: gemini skills install <repo-url>

Antigravity

Copy the skill folder into .agents/skills/doubt-driven-development/ in your workspace.

Cursor

Copy the skill folder into .cursor/skills/doubt-driven-development/ (Cursor also reads .agents/skills/ and .claude/skills/).

Any Agent Skills Client

npx skills add addyosmani/agent-skills --skill doubt-driven-development

These are the standard install paths for each tool. Check the source README for anything specific to this item.

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The summary is written by Swarmnest. We link to the source and do not host or copy it. Labels come from an automated scan of the repository folder ("Uses Network" and "Needs Credentials" are keyword matches), not a security review. Not affiliated with addyosmani. Suggest a correction.

Category	Testing Skills
Format	Agent Skills (SKILL.md Format)
Author	addyosmani
License	MIT
Platforms Listed by the Source	Claude Code Codex Gemini CLI Antigravity Cursor GitHub Copilot Kiro OpenCode Any Agent Skills Client
Operating System	Any OS (general or cross-platform)
Runtime Needs	none
Scripts	Instructions Only. No scripts/ directory and no executable code files found in the skill folder.
Spec Check	Passes our basic SKILL.md check (name matches folder, name and description present and within limits).
Source	addyosmani/agent-skills · skills/doubt-driven-development
Source Status	HTTP 200 on 2026-10-18
Listing Type	Third-Party