product-requirements

product-requirements is a skill for Claude Code from cbrock84/headcount. It costs 95 tokens per session (738 once invoked), scanned A, original, MIT.

A guide to writing product requirements: a shared description of the problem, intended user behavior, boundaries, success measures, and testable conditions for completion.

In plain words
What is it for?
Use it to define features, write acceptance criteria, record open questions, and agree on what is deliberately excluded.
Why use it?
It reduces confusion about what a team is building, prevents hidden edge cases, and limits scope disputes.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the product plugin — 11 skills shipped together

Good fit Use it to define features, write acceptance criteria, record open questions, and agree on what is deliberately excluded.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cbrock84/headcount/product-requirements
About the project

headcount is an organization of independently installable Claude Code plugins, each grouping skills for a department such as finance, security, or demand generation. Claude Code users install the departments they need and invoke their skills for specialized work; the catalogue entries are skills and related agent tooling from that organization.

cbrock84/headcount · 1,320 stars · on GitHub · cbrock84.github.io

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add cbrock84/headcount --skill product-requirements
Clone the repo
git clone --depth 1 https://github.com/cbrock84/headcount

Made for: Claude Code.

Or install product, the plugin that ships this one along with the rest of its 11 skills.

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.

agentmods badge for product-requirements

README.md
[![agentmods](https://agentmods.dev/badge/skills/cbrock84/headcount/product-requirements/github.svg)](https://agentmods.dev/skills/cbrock84/headcount/product-requirements)
Your own site
<a href="https://agentmods.dev/skills/cbrock84/headcount/product-requirements"><img src="https://agentmods.dev/badge/skills/cbrock84/headcount/product-requirements/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.

agentmods 80×15 button for product-requirements

Your own site · 80×15
<a href="https://agentmods.dev/skills/cbrock84/headcount/product-requirements"><img src="https://agentmods.dev/badge/skills/cbrock84/headcount/product-requirements.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 738 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 43
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00095 $0.00738
Opus 5 $0.00048 $0.00369
Sonnet 5 $0.00019 $0.00148
Haiku 4.5 $0.00010 $0.00074

Measured 5d ago against content hash 6ab261b1cec8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

product-requirements scanned grade A with 0 findings 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 5d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/product/skills/product-requirements/SKILL.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Product requirements

A specification exists to prevent expensive rediscovery — of decisions already made, of scope already agreed, and of the edge cases that are found either now on a page or later in production.

Lead with the problem and the number, not the solution

Open with who has the problem, what it costs them today, and what you expect to change if this ships — expressed as a measure with a target and a date. A document that starts with a solution invites the team to optimize the wrong thing and gives you no way to tell afterward whether it worked.

Decide the success measure before building, not at launch. A number chosen afterward is chosen to be met.

State scope by exclusion

Everyone reads what is in scope and assumes the rest is coming. An explicit "not in this" list is the cheapest thing in the document and prevents most scope arguments — including the ones that arrive as clarifications rather than as requests.

Say what is deferred versus what is rejected. Those are different, and conflating them means the rejected thing comes back.

Describe behavior, not implementation

Write what the user experiences and what the system guarantees. Leave the how to the people who will own it — a specification that dictates implementation gets a worse implementation and blurs who is accountable for it.

The states nobody writes down are where the rework comes from. Empty, loading, error, partial, permission-denied, offline, and the first-run case with no data. Also: what happens to records that already exist, what happens at the limits, and what happens when two people do it at once. Most "that wasn't what I meant" traces back to one of these.

Make acceptance criteria testable

Each one should be a statement someone can evaluate as true or false without asking you. "Fast" and "intuitive" are not criteria; a response-time budget and a task someone completes unaided are.

If a criterion cannot be tested, it is either a principle — say so and move it — or it is not finished being thought about.

Read the full file on GitHub · 68 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.

  1. 5d ago First seen · 68 lines · 95 tokens per session scan A 6ab261b1cec8

Subscribe to this mod's changes

product-requirements is a skill published in the GitHub repository cbrock84/headcount (1,320 stars, last pushed 5d ago), licensed MIT. It adds 95 tokens to every session and 738 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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