Lean, compressed prose that assumes Claude's competence — it does not explain what Porter's framework or AI substitution is, and every section earns its tokens; minor rhetorical refrains ('vibes') are stylistic, not padding.

Provides a numbered procedure, an exact copy-paste output schema with per-force signal fields and Fact/Inference labels, a worked labeled example with URLs, and a 4-option Final Step with accepted inputs — fully executable and copy-paste ready.

Clear sequence with explicit gates (search-plan gate, 'Continue unless revised,' 'search only gaps') and built-in validation — signals must survive 'how do you know?' with URLs and labels, plus an 'Assumptions to Validate' feedback section.

SKILL.md is well-organized into clear sections, but the body references bundle files — 'template.md', 'examples/sample.md', 'examples/sample-industrial.md' — that do not exist in the skill directory (only SKILL.md is present), so the disclosure graph breaks at the leaves.

Names multiple concrete actions — 'Read an industry's structure through Porter's Five Forces with documented signals per rating, ending at the profit pool' — specifying the method, the signals mechanism, and the profit-pool endpoint.

Explicitly answers both what (structure read via Five Forces with documented signals ending at the profit pool) and when ('Use when weighing market entry or when margins erode and nobody can say why').

Includes natural trigger terms like 'market entry' and 'margins erode,' but coverage is narrow and omits common variations a user would say ('five forces,' 'competitive analysis,' 'industry analysis,' 'profit pool').

Clear niche — structural industry analysis via Porter's Five Forces, profit pool, documented signals — with distinct triggers unlikely to overlap with adjacent skills; uses third person.