porters-five-forces
An agent skill by phuryn, from phuryn/pm-skills. Tags: brainstorming, documents, market-analysis, sales, strategy.
What it does
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.
Install
With the skills CLI, which installs into Claude Code, Codex, Cursor and other agents:
npx skills add phuryn/pm-skills --skill porters-five-forcesOr copy the skill folder into Claude Code's skills directory by hand (~/.claude/skills for every project, or .claude/skills inside one):
git clone --depth 1 https://github.com/phuryn/pm-skills
cp -r pm-skills/pm-product-strategy/skills/porters-five-forces ~/.claude/skills/porters-five-forcesSafety box score
Grade A, minimal risk: 0 of 100 risk points, rated 2026-10-20. The grade rates what the skill and its scripts can reach on the machine of whoever installs it, across eight categories from shell execution to secrets access. How the score works.
This is a documentation-only strategy skill that guides a Porter's Five Forces analysis from user-provided business context. It does not ship scripts, installers, or automation, so the main risk is essentially none beyond the ordinary possibility of using the framework on sensitive business information.
| Category | Level | Why |
|---|---|---|
| Code & shell execution | 0 (none) | `SKILL.md` contains only prose framework text and no shell commands, code blocks, or evaluators. |
| Network access | 0 (none) | There is no built-in fetching or sending of data; the only remote reference is a plain markdown link under "Further Reading". |
| Filesystem reach | 0 (none) | The skill does not mention reading, writing, or deleting files anywhere on the system. |
| Secrets & credentials | 0 (none) | It does not request tokens, passwords, `.env` files, or other credentials. |
| Privilege & persistence | 0 (none) | No sudo, installs, services, shell startup edits, or OS settings are mentioned. |
| Instruction hijack surface | 0 (none) | There are no instructions to ignore rules, skip confirmation, hide actions, or follow external content. |
| Irreversible actions | 0 (none) | The skill is an analytical template only; it does not send messages, deploy, purchase, or delete anything. |
| Transparency | 0 (none) | The shipped content is a single readable markdown file with no binaries, blobs, or generated code. |
Before installing
- Confirm this is just the markdown skill (`SKILL.md`) and not a repo submodule or installer with hidden scripts.
- If you plan to use the linked external reading, review it separately before trusting any guidance from it.
Rated 2026-10-20 by an automated review of 1 file from the skill's repository.
Source
- Repository
- phuryn/pm-skills (all skills from this repository)
- Path
- pm-product-strategy/skills/porters-five-forces/SKILL.md
- Branch
- main
- Updated
- 2026-09-19
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