Cosmosmith Product Discovery
Turns a vague product idea into a structured idea-brief with acceptance criteria, feeding a larger multi-role agent pipeline.
Test report
- Verdict
- Works with setup
- Score
- Tested
- Jul 16, 2026
- Environment
- Claude Code 2.x (agent harness)
- Upstream re-checked
- Aug 10, 2026 · 7bce2fa
Step 5 tells the agent to use 'the idea brief structure from the plugin template,' but that template lives at plugins/cosmosmith/templates/artifacts/idea-brief.md — a sibling of the skills/ folder, not inside the cosmosmith-product-discovery skill dir itself, so a verbatim `cp -r skills/cosmosmith-product-discovery` install silently drops the template (and the task.md/AGENTS.md scaffolding the workflow reads/writes) since those only get created by the separate `npx cosmosmith init` CLI, not by installing the skill.
Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works
- Installs cleanly 3/5
- Triggers reliably 5/5
- Output vs. baseline 8/10
- Docs & honesty 3/5
What Cosmosmith Product Discovery does
Asks at most three high-leverage Socratic questions, optionally does web research for current market/competitor context, then writes docs/cosmosmith/idea-brief.md covering user, job-to-be-done, first valuable slice, and acceptance criteria, and queues the next task for a downstream 'spec-governor' role. Triggers when a user has a rough idea but no clear problem, target user, or acceptance criteria yet.
How to install Cosmosmith Product Discovery
git clone https://github.com/devnomad-byte/cosmosmith
mkdir -p ~/.claude/skills
cp -r cosmosmith/plugins/cosmosmith ~/.claude/skills/cosmosmith-product-discovery
Skills live in ~/.claude/skills/ (global) or .claude/skills/
(per-project). Restart Claude Code after installing.
Commands — how to trigger Cosmosmith Product Discovery
-
/cosmosmith-product-discoveryTurns a vague product idea into a structured idea-brief with acceptance criteria, feeding a larger multi-role agent pipeline.
It also activates on plain-language prompts like these:
-
I have a rough idea for a subscription price negotiator, help me scope it -
Turn my vague product idea into a brief with acceptance criteria -
Help me figure out the first valuable slice of this feature idea
Frequently asked questions
- Is the Cosmosmith Product Discovery skill free?
- Yes. The skill itself is free from devnomad-byte/cosmosmith. SkillProof publishes the install command and an independent test verdict at no cost.
- Does Cosmosmith Product Discovery work with Claude Code?
- We tested it with Claude Code 2.x (agent harness) on Jul 16, 2026. Verdict: Works with setup. Step 5 tells the agent to use 'the idea brief structure from the plugin template,' but that template lives at plugins/cosmosmith/templates/artifacts/idea-brief.md — a sibling of the skills/ folder, not inside the cosmosmith-product-discovery skill dir itself, so a verbatim `cp -r skills/cosmosmith-product-discovery` install silently drops the template (and the task.md/AGENTS.md scaffolding the workflow reads/writes) since those only get created by the separate `npx cosmosmith init` CLI, not by installing the skill.
- What is the Cosmosmith Product Discovery SkillProof Score?
- 7.6/10 — installs cleanly 3/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 3/5.
- How do I install Cosmosmith Product Discovery?
- Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
- Can I use Cosmosmith Product Discovery with Cursor, Copilot, Gemini CLI, Codex or other AI tools?
- The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.