# Porters Five Forces

Read an industry's structure through Porter's Five Forces with documented signals per...

- Repository: https://github.com/deanpeters/Product-Manager-Skills (7825 stars)
- Category: Engineering
- License: see repository
- Last updated: 2026-10-16
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add deanpeters/Product-Manager-Skills --skill porters-five-forces -g -a claude-code -y`
Codex: `npx skills add deanpeters/Product-Manager-Skills --skill porters-five-forces -g -a codex -y`
Cursor: `npx skills add deanpeters/Product-Manager-Skills --skill porters-five-forces -g -a cursor -y`
Gemini CLI: `npx skills add deanpeters/Product-Manager-Skills --skill porters-five-forces -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add deanpeters/Product-Manager-Skills`

## Description

Read an industry's structure through Porter's Five Forces with documented signals per rating, ending at the profit pool. Use when weighing market entry or when margins erode and nobody can say why.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Porter's Five Forces (Evidence-Cited)

## Purpose

Read an industry's structure through Porter's Five Forces, with evidence: **search plan →
force-by-force ratings with signals → profit-pool implication → next-step options.** Each force, competitive rivalry, threat of new entrants, threat of substitutes, buyer power, supplier power, is
rated weak/moderate/strong and justified with documented signals, because a rating without signals is
vibes. The analysis closes where it should have been aiming all along: **where the profit pool sits
and who is squeezing it.** Five forces is an argument about where margin goes, not a diagram for
slide four.

## Input

**Works best with:** the industry or segment, named as precisely as you can ("clinical data
management SaaS," not "healthcare"), and **the decision this analysis should support**.
**Also useful:** a geographic boundary if the structure differs by region, and a
[`market-landscape-scan`](../market-landscape-scan/SKILL.md) in session, the forces read builds on
it and searches only gaps.

Input supplied inline with the invocation, text after the skill name, a pasted context dump, or an
appended `ARGUMENTS:` line, counts as answers already given. Use it against the question budget;
don't re-ask.

**Arriving empty-handed? That works too.** The skill opens with at most 3 questions (segment,
decision, boundary) and proceeds on labeled assumptions if they go unanswered.

**Example invocation:** `Five forces on mid-market field-service management software, North America, decision: whether we enter or partner.`

## Key Concepts

The rest: https://github.com/deanpeters/Product-Manager-Skills/blob/HEAD/skills/porters-five-forces/SKILL.md