Agent skill

Porter Five Forces

Methodology for systematically performing Porter's 5 Forces analysis.

Apache-2.0Auto-check passedBusiness, Finance & HR

Install Porter Five Forces

skills CLI

$ npx skills add revfactory/harness-100 --skill porter-five-forces -a claude-code

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

GitHub CLI

$ gh skill install revfactory/harness-100 porter-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/revfactory/harness-100.git skills-src && mkdir -p .claude/skills && cp -r skills-src/en/44-market-research/.claude/skills/porter-five-forces .claude/skills/porter-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/

Paste into Claude Code

Install the "porter-five-forces" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/porter-five-forces into .claude/skills/porter-five-forces/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "porter-five-forces", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/porter-five-forces

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add revfactory/harness-100 --skill porter-five-forces -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 porter-five-forces --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .agents/skills && cp -r skills-src/en/44-market-research/.claude/skills/porter-five-forces .agents/skills/porter-five-forces && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "porter-five-forces" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/porter-five-forces into .agents/skills/porter-five-forces/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "porter-five-forces", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add revfactory/harness-100 --skill porter-five-forces -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 porter-five-forces --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/en/44-market-research/.claude/skills/porter-five-forces .cursor/skills/porter-five-forces && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "porter-five-forces" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/porter-five-forces into .cursor/skills/porter-five-forces/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "porter-five-forces", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/revfactory/harness-100.git --path en/44-market-research/.claude/skills/porter-five-forces

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add revfactory/harness-100 --skill porter-five-forces -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 porter-five-forces --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/en/44-market-research/.claude/skills/porter-five-forces .gemini/skills/porter-five-forces && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "porter-five-forces" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/porter-five-forces into .gemini/skills/porter-five-forces/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "porter-five-forces", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install revfactory/harness-100 porter-five-forces

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add revfactory/harness-100 --skill porter-five-forces -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .github/skills && cp -r skills-src/en/44-market-research/.claude/skills/porter-five-forces .github/skills/porter-five-forces && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "porter-five-forces" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/porter-five-forces into .github/skills/porter-five-forces/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "porter-five-forces", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add revfactory/harness-100 --skill porter-five-forces -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 porter-five-forces --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/en/44-market-research/.claude/skills/porter-five-forces .opencode/skills/porter-five-forces && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "porter-five-forces" agent skill from https://github.com/revfactory/harness-100/tree/main/en/44-market-research/.claude/skills/porter-five-forces into .opencode/skills/porter-five-forces/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "porter-five-forces", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: porter-five-forces
GitHub stars: 1.3k
Token cost: ~782 tokens
SKILL.md length: 67 words
Files: 1
Skills in repo: 96
Repo updated: Mar 22, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Methodology for systematically performing Porter's 5 Forces analysis.

Works in 5 steps: Threat of New Entrants → Bargaining Power of Suppliers → Bargaining Power of Buyers → …
Porter analysis
SKILL.md covers Target Agents, The Five Forces Framework, Analysis Output Template and Scoring Guide
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Porter Five Forces is an agent skill from revfactory/harness-100. Methodology for systematically performing Porter's 5 Forces analysis. Use this skill for 'Porter analysis', '5 Forces', 'industry competition analysis', 'entry barrier analysis', 'industry attractiveness', and other industry structure analysis tasks. Note: in-depth financial statement analysis and M&A advisory are outside the scope of this skill.

Its SKILL.md is about 780 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Business, Finance & HR, covering Financial analysis. The licence is Apache-2.0.

When your agent uses it

Porter analysis
Industry competition analysis
Entry barrier analysis
Industry attractiveness

Example prompts

“s 5 Forces analysis. Use this skill for”
“5 Forces”
“industry competition analysis”
“/porter-five-forces”

Workflow steps

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

Threat of New Entrants
Bargaining Power of Suppliers
Bargaining Power of Buyers
Threat of Substitute Products
Rivalry Among Existing Competitors

What it can do on your machine

Read from SKILL.md and the folder at commit 8e8d35c. 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 (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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

Porter Five Forces loads about 782 tokens when it runs. Until then it costs about 92 tokens; SKILL.md has 67 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~92
When it runs · the whole SKILL.md, loaded when a task matches: ~782

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 revfactory/harness-100 at commit 8e8d35c, republished under its Apache-2.0 licence (© revfactory). 67 words, ~782 tokens.

Download SKILL.mdSave it as .claude/skills/porter-five-forces/SKILL.md (or your agent's skills folder).

name: porter-five-forces
description: Methodology for systematically performing Porter's 5 Forces analysis. Use this skill for 'Porter analysis', '5 Forces', 'industry competition analysis', 'entry barrier analysis', 'industry attractiveness', and other industry structure analysis tasks. Note: in-depth financial statement analysis and M&A advisory are outside the scope of this skill.

Porter Five Forces — Industry Structure Analysis Methodology

A skill that enhances industry structure analysis for the industry-analyst and competitor-analyst.

Target Agents

industry-analyst — Analyzes industry competitive dynamics
competitor-analyst — Evaluates competitive positioning within industry structure

The Five Forces Framework

1. Threat of New Entrants

Assessment factors:
- Capital requirements (High = low threat)
- Economies of scale (High = low threat)
- Brand loyalty / switching costs
- Access to distribution channels
- Government regulations / licenses
- Proprietary technology / patents
- Network effects

Rating: Low / Medium / High threat

2. Bargaining Power of Suppliers

Assessment factors:
- Number of suppliers (Few = high power)
- Switching costs to alternative suppliers
- Availability of substitutes
- Supplier concentration vs. industry
- Importance of volume to supplier
- Forward integration threat

Rating: Low / Medium / High power

3. Bargaining Power of Buyers

Assessment factors:
- Number of buyers (Few = high power)
- Buyer volume relative to total sales
- Switching costs for buyers
- Buyer price sensitivity
- Product differentiation
- Backward integration threat
- Access to market information

Rating: Low / Medium / High power

4. Threat of Substitute Products

Assessment factors:
- Availability of close substitutes
- Price-performance ratio of substitutes
- Buyer switching costs
- Buyer propensity to substitute
- Cross-industry substitutes

Rating: Low / Medium / High threat

5. Rivalry Among Existing Competitors

Assessment factors:
- Number and size of competitors
- Industry growth rate
- Product differentiation
- Exit barriers
- Fixed costs / value added
- Capacity utilization
- Competitive information availability

Rating: Low / Medium / High rivalry

Analysis Output Template

markdown

## Porter's Five Forces Analysis: [Industry]

### Summary
| Force | Rating | Key Factors |
|-------|--------|-------------|
| New Entrants | Low/Med/High | [Top 2-3 factors] |
| Supplier Power | Low/Med/High | [Top 2-3 factors] |
| Buyer Power | Low/Med/High | [Top 2-3 factors] |
| Substitutes | Low/Med/High | [Top 2-3 factors] |
| Rivalry | Low/Med/High | [Top 2-3 factors] |

### Overall Industry Attractiveness
[Assessment based on combined forces]

### Strategic Implications
1. [Implication + recommended action]
2. [Implication + recommended action]
3. [Implication + recommended action]

Scoring Guide

Each force: 1 (Low) to 5 (High)
Industry Attractiveness Score = 25 - Sum of forces
  20-25: Very attractive
  15-19: Attractive
  10-14: Moderate
  5-9: Unattractive

Files

Just SKILL.md in en/44-market-research/.claude/skills/porter-five-forces of revfactory/harness-100.

Open the folder on GitHubat commit 8e8d35c

Compare with similar skills

Porter Five Forces next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Porter Five Forces compared with similar skills
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Porter Five Forces this skillrevfactory/harness-100	1.3k	—	~782	Automated safety check: Pass	Apache-2.0	6 mo ago
Financial Analyzinghuangjia2019/claude-code-engineering	1.1k	1 repos	~474	Automated safety check: Pass	None	2 mo ago
Longbridge Earningshelsome/folio	269	1 repos	~2.5k	Automated safety check: Pass	None	4 days ago
Fundamentalsstaskh/trading_skills	374	1 repos	~836	Automated safety check: Pass	MIT	9 days ago
Earnings AnalysisWind-Alice/AliceMarket	130	3 repos	~2.2k	Automated safety check: Pass	None	28 days ago
Buy Side Equity Research Memohaskaomni/serenity-skill	632	—	~3.8k	Automated safety check: Pass	MIT	2 mo ago

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Questions about Porter Five Forces

What does Porter Five Forces do?

Methodology for systematically performing Porter's 5 Forces analysis. Porter Five Forces is an agent skill from revfactory/harness-100. Methodology for systematically performing Porter's 5 Forces analysis.

When should I use Porter Five Forces?

Porter Five Forces fits situations like: porter analysis; industry competition analysis; entry barrier analysis; industry attractiveness.

How do I install Porter Five Forces in Claude Code?

Run `npx skills add revfactory/harness-100 --skill porter-five-forces -a claude-code`. Or copy the skill folder (en/44-market-research/.claude/skills/porter-five-forces in revfactory/harness-100) into .claude/skills/porter-five-forces in your project. Claude Code loads it when a task matches its description.

How do I install Porter Five Forces in Codex?

Run `npx skills add revfactory/harness-100 --skill porter-five-forces -a codex`. Or copy the skill folder (en/44-market-research/.claude/skills/porter-five-forces in revfactory/harness-100) into .agents/skills/porter-five-forces in your project. Codex loads it when a task matches its description.

Can I use Porter 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 revfactory/harness-100 --skill porter-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/porter-five-forces, .gemini/skills/porter-five-forces, .github/skills/porter-five-forces and .opencode/skills/porter-five-forces in your project.

What does Porter Five Forces need to run?

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

Does Porter Five Forces access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Porter 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 Porter Five Forces use?

Porter Five Forces is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Porter Five Forces use?

About 782 tokens (SKILL.md is roughly 3.1k 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 Porter Five Forces?

Skills that share tags, products or a category with Porter Five Forces: Financial Analyzing (huangjia2019/claude-code-engineering, 1.1k stars), Longbridge Earnings (helsome/folio, 269 stars), Fundamentals (staskh/trading_skills, 374 stars) and Earnings Analysis (Wind-Alice/AliceMarket, 130 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Porter Five Forces?

revfactory (a GitHub user) maintains it in revfactory/harness-100, which has 1,293 GitHub stars. The repository holds 96 skills in this directory. The repository was last updated on March 22, 2026.

Source: revfactory/harness-100 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Porter Five Forces

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Porter Five Forces — Industry Structure Analysis Methodology

Target Agents

The Five Forces Framework

1. Threat of New Entrants

2. Bargaining Power of Suppliers

3. Bargaining Power of Buyers

4. Threat of Substitute Products

5. Rivalry Among Existing Competitors

Analysis Output Template

Scoring Guide

Files

Compare with similar skills

Similar skills

More from revfactory/harness-100

Related

Questions about Porter Five Forces