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feat(pm-product-strategy): add seven-powers skill

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Adds Hamilton Helmer's 7 Powers framework skill for assessing durable
competitive advantage (scale economies, network effects, counter-
positioning, switching costs, branding, cornered resource, process
power). Updates skill counts and descriptions across marketplace.json,
plugin.json, and READMEs.

Merged from louzhedong:codex/add-seven-powers-skill (PR vs phuryn/pm-skills).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KcEyZ9gTqwkoiDBfW4fVzu
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Justin Paul
2026-06-22 21:40:14 -04:00
parent a0cd730d4c
commit a330c887f6
5 changed files with 213 additions and 7 deletions
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README.md
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@@ -7,7 +7,7 @@
# PM Skills Marketplace: The AI Operating System for Better Product Decisions
> 68 PM skills and 42 chained workflows across 9 plugins. Claude Code, Cowork, and more. From discovery to strategy, execution, launch, growth, and shipping AI-built code.
> 69 PM skills and 42 chained workflows across 9 plugins. Claude Code, Cowork, and more. From discovery to strategy, execution, launch, growth, and shipping AI-built code.
![PM Skills marketplace: skills, commands, and all 9 plugins at a glance](.docs/images/plugins.png)
@@ -180,11 +180,11 @@ Commands:
</details>
<details>
<summary><strong>2. pm-product-strategy</strong> — Vision, business models, pricing, competitive landscape (12 skills, 5 commands)</summary>
<summary><strong>2. pm-product-strategy</strong> — Vision, business models, pricing, competitive landscape (13 skills, 5 commands)</summary>
Product strategy, vision, business models, pricing, and macro environment analysis. Covers the full strategic toolkit from vision crafting through competitive landscape scanning.
**Skills (12):**
**Skills (13):**
- `product-strategy` — Comprehensive 9-section Product Strategy Canvas (vision → defensibility)
- `startup-canvas` — Startup Canvas combining Product Strategy (9 sections) + Business Model — an alternative to BMC and Lean Canvas for new products
@@ -197,6 +197,7 @@ Product strategy, vision, business models, pricing, and macro environment analys
- `swot-analysis` — SWOT analysis with actionable recommendations
- `pestle-analysis` — Macro environment: Political, Economic, Social, Technological, Legal, Environmental
- `porters-five-forces` — Competitive forces analysis (rivalry, suppliers, buyers, substitutes, new entrants)
- `seven-powers` — Durable competitive advantage analysis across scale economies, network effects, counter-positioning, switching costs, branding, cornered resource, and process power
- `ansoff-matrix` — Growth strategy mapping across markets and products
**Commands (5):**
@@ -213,6 +214,7 @@ Skills:
- `Compare Lean Canvas vs Business Model Canvas vs Startup Canvas for my marketplace startup`
- `Design a value proposition for our AI writing assistant targeting non-native English speakers`
- `Run a Porter's Five Forces analysis for the project management SaaS market`
- `Assess whether our vertical AI agent has a durable competitive moat`
Commands:
- `/strategy B2B project management tool for agencies`