Conciseness

The body is mostly efficient methodology with concrete formulas, but includes generic boilerplate ('Clarify goals, constraints, and required inputs. Apply relevant best practices and validate outcomes.'), duplicated '## Instructions' and '## Instructions for Claude' headers, and Do/Don't padding, matching 'Mostly efficient but includes some unnecessary explanation or could be tightened'. It is not a 4 because the boilerplate and redundancy are clearly trimmable.

Actionability

It provides concrete formulas (TAM = Σ Segment Size × ACV; SAM = TAM × Geographic % × Product Fit % × Market Readiness %), specific SOM percentages (2-3% Year 3, 4-6% Year 5), named data sources, and a defined report structure, fitting 'Mostly executable guidance; concrete code or commands with minor gaps'. As an instruction-only skill the absence of code is acceptable; it is not a 5 because there is no worked numeric example covering the common case.

Workflow Clarity

The process is clearly sequenced Step 1 through Step 9 with an explicit validation checkpoint (top-down within 30%, 'If variance > 30%, investigate and explain') and a dedicated 'Validation and Sanity Checks' section, matching 'Clear sequence with most checkpoints present; minor validation gaps'. It is not a 5 because the validation feedback loop is light (no re-computation loop) and checkpoints beyond the TAM variance check are descriptive rather than enforced.

Progressive Disclosure

Section structure exists, but the entire methodology/report template is inlined in SKILL.md and the one external reference ('resources/implementation-playbook.md') points to a file that does not exist in the bundle, plus a reference to an external 'market-sizing-analysis skill'; this matches 'Some structure but could be better organized; references present but not clearly signaled'. It is not a 4 because of the dangling reference and the lack of any real one-level-deep supporting files.

Specificity

The description names the domain ('market opportunity analysis') and one concrete action set ('TAM/SAM/SOM calculations'), but does not enumerate the broader set of actions (e.g., bottom-up/top-down validation, report generation), matching the anchor 'Names domain and 1-2 concrete actions, but not comprehensive'. It is above a 2 because the TAM/SAM/SOM framing is concrete, but below a 4 due to limited action coverage.

Completeness

A clear 'what' is present ('Generate comprehensive market opportunity analysis with TAM/SAM/SOM calculations') but there is no 'when' / 'Use when...' trigger guidance, so per the rubric guideline completeness is capped at 3, matching 'Has a clear what but when is missing or only weakly implied'. It is not a 4 because the when clause is entirely absent.

Trigger Term Quality

It surfaces relevant natural terms ('market opportunity analysis', 'TAM/SAM/SOM') that users would say, but misses common synonyms and variations such as 'market sizing', 'addressable market', or 'total addressable market', fitting the anchor 'Some relevant keywords but missing common variations or synonyms'. Not a 4 because coverage is narrow and concentrated in one phrase.

Distinctiveness Conflict Risk

The TAM/SAM/SOM framing carves a clear niche unlikely to collide with unrelated skills, matching 'Mostly distinct; minor overlap risk with closely related skills'. It is not a 5 because it could overlap with adjacent financial-projections or business-case skills without an explicit trigger boundary.