Conciseness

The body is mostly efficient procedural prose for the author's novel convergence methodology, but it glosses well-known concepts Claude already knows (e.g. 'Strangler Pattern: Gradual migration through phased replacement', 'Facade Pattern: Complexity hiding through unified interface'), which is unnecessary padding; this fits 'mostly efficient but includes some unnecessary explanation'.

Actionability

As an instruction-only methodology skill it provides concrete procedural steps ('Form the simplest end-to-end path', 'Remove each proposed addition and re-test its governing condition') and explicit quality-check checklists, but the guidance remains abstract and conceptual rather than fully concrete, fitting 'some concrete guidance but incomplete' rather than the mostly-executable level 4.

Workflow Clarity

Seven phases are clearly sequenced with explicit checkpoints (Phase 1's 'Stop when...' criteria, Phase 2's ordered Evidence/Subtraction checks with a re-test feedback loop, and a closing Quality Checks checklist), matching 'clear sequence with most checkpoints present'; it stays at 4 rather than 5 because the validation gates are conceptual stop-conditions rather than concrete pass/fail verification commands.

Progressive Disclosure

The body is well-organized into clearly headed sections (phases, verification levels, integration points, quality checks, guidelines) with no bundle files and no nested references; the pattern glossary and risk/constraint catalogs are inline reference-like content that could arguably be split out, giving 'good structure; minor organization gaps' rather than a clean level 5.

Specificity

The description names the domain ('Implementation strategy selection framework') and three actions ('planning implementation strategy, selecting development approach, or defining verification criteria'), but the actions are abstract conceptual verbs rather than tangible operations, fitting the 'names domain and 1-2 concrete actions but not comprehensive' anchor rather than the more concrete level 4.

Completeness

It explicitly answers both 'what' ('Implementation strategy selection framework') and 'when' with a concrete 'Use when...' clause listing three trigger conditions, matching the level-5 anchor for clearly and explicitly answering both with concrete trigger phrases.

Trigger Term Quality

Three distinct natural trigger phrases ('planning implementation strategy', 'selecting development approach', 'defining verification criteria') give good keyword coverage beyond the single-keyword level-3 anchor, though common synonyms like 'how to implement' or 'build approach' are missing, keeping it just below level 5.

Distinctiveness Conflict Risk

The implementation-strategy-selection niche is fairly distinct with specific triggers unlikely to fire for unrelated skills, but 'planning implementation strategy' has minor overlap risk with general planning or architecture skills, placing it at level 4 rather than the minimal-conflict level 5.