Agent skill

Porters Five Forces

by phuryn in phuryn/pm-skills

Perform Porter's Five Forces analysis — competitive rivalry, supplier power, buyer power, threat of substitutes, and threat of new entrants.

MITAuto-check passed

Install Porters Five Forces

skills CLI
$ npx skills add phuryn/pm-skills --skill porters-five-forces -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install phuryn/pm-skills porters-five-forces --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/phuryn/pm-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/pm-product-strategy/skills/porters-five-forces .claude/skills/porters-five-forces && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
porters-five-forces
GitHub stars
27k
Token cost
~2k tokens
SKILL.md length
978 words
Files
1
Skills in repo
67
Repo updated
First seen
Licence
MIT

At a glance

Perform Porter's Five Forces analysis — competitive rivalry, supplier power, buyer power, threat of substitutes, and threat of new entrants.

  • Works in 5 steps: Competitive Rivalry (How intense is… → Supplier Power (How much power do… → Buyer Power (How much power do customers… → …
  • Analyzing industry dynamics
  • SKILL.md covers Metadata, Instructions, Input Requirements and Porter's Five Forces Framework, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Porters Five Forces is an agent skill from phuryn/pm-skills. Perform Porter's Five Forces analysis — competitive rivalry, supplier power, buyer power, threat of substitutes, and threat of new entrants. Use when analyzing industry dynamics, assessing competitive forces, or evaluating market attractiveness.

Its SKILL.md is about 2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: PM Skills Marketplace: 100+ agentic skills, commands, and plugins — from discovery to strategy, execution, launch, and growth. The licence is MIT.

When your agent uses it

  • Analyzing industry dynamics
  • Assessing competitive forces
  • Evaluating market attractiveness

Example prompts

  • “/porters-five-forces”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

  1. Competitive Rivalry (How intense is competition?)
  2. Supplier Power (How much power do suppliers have?)
  3. Buyer Power (How much power do customers have?)
  4. Threat of Substitutes (Are there alternative solutions?)
  5. Threat of New Entrants (Can new competitors easily enter?)

What it can do on your machine

Read from SKILL.md and the folder at commit 6058e29. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • productcompass.pm

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Porters Five Forces loads about 2k tokens when it runs. Until then it costs about 66 tokens; SKILL.md has 978 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~66
When it runs · the whole SKILL.md, loaded when a task matches
~2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from phuryn/pm-skills at commit 6058e29, republished under its MIT licence (© phuryn). 978 words, ~2,046 tokens.

Download SKILL.mdSave it as .claude/skills/porters-five-forces/SKILL.md (or your agent's skills folder).
name
porters-five-forces
description
Perform Porter's Five Forces analysis — competitive rivalry, supplier power, buyer power, threat of substitutes, and threat of new entrants. Use when analyzing industry dynamics, assessing competitive forces, or evaluating market attractiveness.

Porter's Five Forces

Metadata

  • Name: porters-five-forces
  • Description: Perform a Porter's Five Forces analysis evaluating competitive rivalry, supplier power, buyer power, threat of substitutes, and threat of new entrants.
  • Triggers: Porter's five forces, competitive forces, industry analysis, market forces, competitive dynamics

Instructions

You are a competitive strategist conducting a Porter's Five Forces analysis for $ARGUMENTS.

Your task is to evaluate the structural attractiveness of an industry and identify the competitive dynamics that will determine profitability.

Input Requirements

  • Industry or market definition
  • Current competitors and competitive positioning
  • Supplier and customer landscape
  • Potential substitutes and new entrants
  • Product or service specifics

Porter's Five Forces Framework

1. Competitive Rivalry (How intense is competition?)

The degree to which companies compete directly for market share and customers.

High Rivalry When:

  • Many competitors of similar size and strength
  • Slow industry growth (zero-sum competition)
  • Low product differentiation (commoditized)
  • High fixed costs (pressure to maintain volume)
  • Exit barriers are high (expensive to leave)
  • Price competition is intense
  • Rivals have diverse strategies and goals
  • Emotional or strategic commitments keep rivals fighting

Low Rivalry When:

  • Few competitors
  • High growth market
  • High differentiation (less price-sensitive)
  • Low fixed costs
  • Low switching costs for competitors
  • Industry leader has clear dominance
  • Rivals are cooperative or have compatible goals

Strategic Implications:

  • Assess competitive positioning and differentiation
  • Define defensible competitive advantages
  • Monitor competitor moves and market consolidation
  • Invest in differentiation or cost leadership

2. Supplier Power (How much power do suppliers have?)

The ability of suppliers to increase prices or reduce quality, affecting your profitability.

High Supplier Power When:

  • Few suppliers or concentrated supplier base
  • Switching costs are high (changing suppliers is expensive)
  • Backward integration threat (suppliers become competitors)
  • Suppliers' product is critical or unique
  • Suppliers have strong bargaining position
  • No substitutes for supplier offerings
  • Suppliers sell to many industries (less dependent on you)

Low Supplier Power When:

  • Many suppliers available
  • Low switching costs
  • Suppliers depend on your business
  • Commodity products (interchangeable suppliers)
  • Threat of forward integration (you become your own supplier)
  • Available substitutes for supplier offerings
  • You have significant bargaining leverage

Strategic Implications:

  • Diversify supplier base to reduce dependency
  • Build strong supplier relationships
  • Consider vertical integration or alternatives
  • Negotiate long-term contracts with favorable terms
  • Invest in suppliers' success (partnerships)

3. Buyer Power (How much power do customers have?)

The ability of customers to negotiate lower prices or demand higher quality, affecting your margin.

High Buyer Power When:

  • Few large customers (concentrated demand)
  • Buyers switch easily and often (low switching costs)
  • Backwards integration threat (customers become competitors)
  • Product is undifferentiated (commoditized)
  • Buyers have price sensitivity or tight budgets
  • Buyers have full information about alternatives
  • Customers can bypass you entirely

Low Buyer Power When:

  • Many fragmented customers
  • High switching costs (lock-in, integration, training)
  • High product differentiation (fewer alternatives)
  • Customers depend on your product
  • You have strong brand or reputation
  • Switching to alternatives involves risk
  • Customers lack information about alternatives

Strategic Implications:

  • Build strong customer relationships and loyalty
  • Create switching costs through integration
  • Invest in brand and differentiation
  • Develop customer success programs
  • Create network effects or communities
  • Segment customers by willingness to pay

4. Threat of Substitutes (Are there alternative solutions?)

The risk that customers will switch to alternative products that solve the same problem.

High Threat When:

  • Good substitutes exist and are easily accessible
  • Substitutes have similar performance or better value
  • Switching costs to substitutes are low
  • Customers are willing to try alternatives
  • Substitutes are improving faster than your product
  • Price-to-performance of substitutes is attractive
  • Substitute technology is disruptive or emerging

Low Threat When:

  • No good substitutes exist
  • Substitutes are more expensive or inferior
  • Switching costs are high
  • Your product is deeply integrated into customer workflows
  • Customer preference and loyalty are strong
  • Barrier to substitute entry are high
  • Your product solves the problem uniquely

Strategic Implications:

  • Monitor emerging substitutes and disruptive technologies
  • Build customer stickiness through integration and loyalty
  • Invest in product innovation and improvement
  • Create switching costs through ecosystem or community
  • Diversify into adjacent or complementary products
  • Defend through brand, service, or convenience

Show full SKILL.md (322 more words)Show less
5. Threat of New Entrants (Can new competitors easily enter?)

The risk that new competitors will enter the market and capture share.

High Threat When:

  • Low barriers to entry (capital, expertise, licensing)
  • Attractive industry margins and growth
  • Incumbents are vulnerable or complacent
  • Distribution or channel access is available
  • Economies of scale are limited
  • Network effects are weak or absent
  • Regulation is permissive
  • New technologies enable disruption

Low Threat When:

  • High barriers to entry (capital, IP, expertise, relationships)
  • Entrenched incumbents with scale advantages
  • Strong network effects or switching costs
  • Brand loyalty is high
  • Regulatory or licensing barriers exist
  • Economies of scale create cost advantage
  • Control of critical resources or distribution
  • Retaliation by incumbents is credible

Strategic Implications:

  • Build defensible barriers (IP, brand, network effects)
  • Establish cost leadership and scale advantages
  • Create switching costs and customer lock-in
  • Invest in brand and customer relationships
  • Monitor startups and disruptors in your space
  • Build alliances and control key resources

Output Process

  1. Assess each of the five forces (High, Medium, Low)
  2. Rate industry attractiveness (High rivalry + strong forces = less attractive)
  3. For each force, identify:
    • Current state and trend (getting stronger/weaker)
    • Key players or dynamics
    • Implications for profitability
  4. Prioritize the 2-3 forces most critical to your strategy
  5. Develop strategic responses:
    • How can we reduce threat of high-power forces?
    • How can we leverage weak forces for advantage?
  6. Identify competitive positioning opportunities
  7. Create strategic initiatives aligned with force analysis

Industry Attractiveness

  • Attractive: Low rivalry, weak supplier/buyer power, few substitutes, high entry barriers
  • Unattractive: High rivalry, strong supplier/buyer power, many substitutes, low entry barriers
  • Moderate: Mixed dynamics requiring strategic differentiation

Notes

  • No industry is universally attractive or unattractive; position matters
  • Same industry can be attractive for some companies, unattractive for others
  • Forces change over time; re-assess as market evolves
  • Use Porter's Five Forces with SWOT and PESTLE for comprehensive analysis
  • Strategy should directly address the highest-force threats

Further Reading

© phuryn, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in pm-product-strategy/skills/porters-five-forces of phuryn/pm-skills.

Open the folder on GitHubat commit 6058e29

Compare with similar skills

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Questions about Porters Five Forces

What does Porters Five Forces do?

Perform Porter's Five Forces analysis — competitive rivalry, supplier power, buyer power, threat of substitutes, and threat of new entrants. Porters Five Forces is an agent skill from phuryn/pm-skills. Perform Porter's Five Forces analysis — competitive rivalry, supplier power, buyer power, threat of substitutes, and threat of new entrants.

When should I use Porters Five Forces?

Porters Five Forces fits situations like: analyzing industry dynamics; assessing competitive forces; evaluating market attractiveness.

How do I install Porters Five Forces in Claude Code?

Run `npx skills add phuryn/pm-skills --skill porters-five-forces -a claude-code`. Or copy the skill folder (pm-product-strategy/skills/porters-five-forces in phuryn/pm-skills) into .claude/skills/porters-five-forces in your project. Claude Code loads it when a task matches its description.

How do I install Porters Five Forces in Codex?

Run `npx skills add phuryn/pm-skills --skill porters-five-forces -a codex`. Or copy the skill folder (pm-product-strategy/skills/porters-five-forces in phuryn/pm-skills) into .agents/skills/porters-five-forces in your project. Codex loads it when a task matches its description.

Can I use Porters Five Forces in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add phuryn/pm-skills --skill porters-five-forces -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/porters-five-forces, .gemini/skills/porters-five-forces, .github/skills/porters-five-forces and .opencode/skills/porters-five-forces in your project.

What does Porters Five Forces need to run?

SKILL.md names no scripts, command-line tools or credentials: Porters Five Forces is instructions for the agent only.

Does Porters Five Forces access the network?

SKILL.md names 1 domain. As links in the text: productcompass.pm. This is read from the text; nothing was executed.

Is Porters Five Forces safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Porters Five Forces use?

Porters Five Forces is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Porters Five Forces use?

About 2k tokens (SKILL.md is roughly 8.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Porters Five Forces?

Skills that share tags, products or a category with Porters Five Forces: Porters Five Forces (deanpeters/Product-Manager-Skills, 7.2k stars), Porter Five Forces (revfactory/harness-100, 1.3k stars), Porters Five Forces (borghei/Claude-Skills, 891 stars) and React Performance (affaan-m/ECC, 276k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Porters Five Forces?

phuryn (a GitHub user) maintains it in phuryn/pm-skills, which has 26,862 GitHub stars. The repository holds 67 skills in this directory. The repository was last updated on October 9, 2026.

Source: phuryn/pm-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.