A project-management command for turning a prioritised opportunity or hypothesis into solution concepts and validating them. It uses project context such as metrics, priorities, customer profiles, brand guidance, and previous research.

Use it to prototype solutions, review related experiments and research, and prepare experiment design.

It gives a defined process for moving from a problem idea to concepts that are ready to test.

How motorway-sandbox/product-os configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to motorway-sandbox/product-os. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/motorway-sandbox/product-os/main/.claude/commands/prototype.md

Clone the repo

git clone --depth 1 https://github.com/motorway-sandbox/product-os

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/commands/motorway-sandbox/product-os/prototype/github.svg)](https://agentmods.dev/commands/motorway-sandbox/product-os/prototype)

Your own site

<a href="https://agentmods.dev/commands/motorway-sandbox/product-os/prototype"><img src="https://agentmods.dev/badge/commands/motorway-sandbox/product-os/prototype/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/commands/motorway-sandbox/product-os/prototype"><img src="https://agentmods.dev/badge/commands/motorway-sandbox/product-os/prototype.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 2,489 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.02489
Opus 5.5	$0.00000	$0.00996
Sonnet 5.5	$0.00000	$0.00498
Haiku 4.5	$0.00000	$0.00249

Measured 2mo ago against content hash 1b464ab068c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

prototype scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Hidden instructionshighPrompt injection

Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.

<!-- purpose: Solution prototyping: generate structurally different concepts from a hypothesis, run psych audit and persona fit, get early panel signal, produce comparison and recommendation -->

.claude/commands/prototype.md · 233 lines

How it starts

The opening of the file, as written. The whole thing — 233 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Prototype

Generate and validate solution concepts for a prioritised opportunity or hypothesis.

Input: $ARGUMENTS

This command covers PM playbook Stage 2: Solution Prototyping & Validation. It takes the output of discovery (a hypothesis or opportunity) and produces tested solution concepts ready for experiment design.

Important: Run the full prototype process in one pass. Pause only at the final step for user feedback.

Step 0: Load context

Parse the input. The user should provide one of:
- A hypothesis in IF/THEN/BECAUSE format
- A path to an investigation output or opportunity summary
- A description of the opportunity to prototype against
Read supporting context:
- data/funnel-context.md — metric definitions, funnel baselines
- context/current-priorities.md — strategic alignment
- context/personas/customer-personas.md and context/personas/partner-personas.md — priority personas
- context/brand/messaging/ — brand voice and terminology constraints
Check for prior work:
- Search projects/ for existing experiment docs on this topic
- Search insights/ for relevant UXR studies, CX analysis, and review data
- Read agent memory files if available: team/{initials}/agents/memory/product-manager.md, team/{initials}/agents/memory/uxr.md
Extract the core problem. Before generating solutions, clearly state:
- The user problem: What pain point are we solving? For which personas?
- The business problem: What metric are we trying to move? By how much?
- The mechanism: Why does this problem exist? What's the root cause?
- The constraint: What must we NOT break? (guardrail metrics)

If the input doesn't contain enough information to define these, state what's missing and ask.

Read the full file on GitHub · 233 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 233 lines · 0 tokens per session scan C 1b464ab068c3

Subscribe to this mod's changes

prototype is a command published in the GitHub repository motorway-sandbox/product-os (11 stars, last pushed 5mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,489 tokens. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

Planning Project management

prototype next to 6 commands from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
prototypemotorway-sandbox/product-os	Command	11	5mo ago	MIT	C	0	Claude Code
checklistgithub/spec-kit	Command	148k	yesterday	MIT	A	13	Claude Code
clarifygithub/spec-kit	Command	148k	yesterday	MIT	A	27	Claude Code
specifygithub/spec-kit	Command	148k	yesterday	MIT	A	13	Claude Code
analyzegithub/spec-kit	Command	148k	yesterday	MIT	A	26	Claude Code
convergegithub/spec-kit	Command	148k	yesterday	MIT	A	35	Claude Code
implementgithub/spec-kit	Command	148k	yesterday	MIT	A	14	Claude Code

product-os: Command for Claude Code