Skills

doubt-driven-development

doubt-driven-development is a skill in addyosmani/agent-skills, last changed 7 Sept 2026. It can run shell commands. Our pattern check flagged nothing at commit aeac41d on 26 Oct 2026.

Pattern check: nothing flagged · commit aeac41d · 26 Oct 2026

Install
From the author
Subjects every non-trivial decision to a fresh-context adversarial review before it stands. Use when you want every assumption cross-examined before proceeding, when stress-testing a plan for hidden failure modes, when correctness matters more than speed, when working in unfamiliar code, when stakes are high (production auth, security-sensitive logic, a high-stakes migration, irreversible operations), or any time a confident output would be cheaper to verify now than to debug later.
Licence
MIT
Repo stars
110.9k
Folder last changed
7 Sept 2026 (opens in a new tab)
Publisher
addyosmani
Files
1 file
Checked
aeac41d (opens in a new tab) · 26 Oct 2026

Install

Each tab says whether it installs commit aeac41d, the one we checked, or the latest version.

No tab for your agent? Use Any agent for OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie, Amp and Antigravity, and Claude Code for Cline. Kiro needs the folder copied by hand.

Pinned to commit aeac41d, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/addyosmani/agent-skills.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin aeac41d4d005999432bb7312f7ff06383a91d59d &&
  git -C "$tmp" sparse-checkout set -- skills/doubt-driven-development &&
  git -C "$tmp" checkout -q aeac41d4d005999432bb7312f7ff06383a91d59d &&
  mkdir -p .claude/skills &&
  mkdir .claude/skills/doubt-driven-development &&
  cp -R "$tmp"/skills/doubt-driven-development/. .claude/skills/doubt-driven-development/ &&
  rm -rf "$tmp"

If Claude Code was already running and this created the skills folder, run /reload-skills.

Or install the agent-skills plugin it ships in. Installs the latest version, not the one we checked. Installs everything in the plugin, including any hooks, MCP servers and scripts our check doesn't cover.

claude plugin marketplace add addyosmani/agent-skills --scope project &&
  claude plugin install agent-skills@addy-agent-skills --scope project
Claude Code docs (opens in a new tab)

What it can touch

From the files and frontmatter at commit aeac41d. This is how much a skill can do, not whether it is risky.

What it can touch: Scripts or outside hosts

  • Runs shell commands

    Its instructions or files give the agent commands to run on your computer.

Pattern check

Pattern check: nothing flagged · commit aeac41d · 26 Oct 2026

We checked every text file in this skill, at commit aeac41d on 26 Oct 2026, against 45 published patterns such as download-and-run commands, hidden text and credential access. We don't run the skill, we don't read the web pages it points to, and we can't judge everything its instructions might lead an agent to do. In published tests, pattern checks like this one missed most malicious skills. Read the skill before you install it — especially anything it asks you to download or run.

How the check worksReport an incorrect finding

Format check

Each agent reads SKILL.md a little differently. We check the file against each one's published rules; we don't run the skill in any agent.

  • Agent Skills specPasses

    The open format from agentskills.io, held to what the strictest agents enforce, so one folder loads everywhere.

    • Note

      There is no license field, so readers can't tell whether they may reuse the skill. O2

      Fix: Add license: with an SPDX name such as MIT or Apache-2.0, or the name of a bundled licence file.

  • Claude CodePasses
  • Claude apps & API uploadPasses

    Uploading to claude.ai or the Claude API, or packaging with Anthropic's script, accepts only the six spec fields and stops on anything else.

    • Note

      The description is 487 characters. The claude.ai Help Center says 200 at most, though Anthropic's API docs and validator allow 1,024. D4

      Fix: If the claude.ai upload refuses it, trim the description to 200 characters.

  • OpenAI (Codex & API)Passes
  • VS Code & CopilotPasses

SKILL.md

Files

1 file

PathSize
SKILL.md (opens in a new tab)16.3 KB

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All skills in addyosmani/agent-skills