Conciseness

The body is lean and efficient: terse question batches, a compact plan template, and three-bullet guardrails, with no explanation of concepts Claude already knows ('walking skeleton' is used without definition). Not 4 because there is no over-explanation to trim; every section earns its place.

Actionability

Fully actionable for an instruction-only skill: 12 copy-paste-ready interview questions in four labeled batches, a concrete plan.md template, an explicit phase-4 self-review checklist, and build + smoke-test steps. Not 4 because guidance is specific enough to execute directly with no gaps.

Workflow Clarity

Four phases are explicitly sequenced ('Do not skip phases') with validation checkpoints throughout: wait-for-answers, user confirmation of the summary, explicit approval before phase 3, a stop-and-update-the-plan feedback loop, and a phase-4 review/build/report step. Not 4 because checkpoints are explicit and include error-recovery loops.

Progressive Disclosure

The ~80-line body is self-contained with well-organized per-phase sections, and no content needs splitting into separate files. External skill references ('planning-first', 'uml-maintenance') are clearly signaled with an inline fallback ('if it is available; otherwise use this structure'), keeping navigation one level deep. Not 4 because organization and signal placement have no notable gaps.

Specificity

Lists multiple concrete actions covering the full flow — 'deep-dive architectural conversation', 'plan → implement → review chain', 'writes the initial UML.md' — with comprehensive coverage of what the skill does. Not 4, since there are no minor gaps in coverage; the described actions span the entire skill workflow.

Completeness

Explicitly answers both 'what' (architectural conversation, plan/implement/review chain, writes UML.md) and 'when' ('Load this when the user starts pi in an empty or near-empty directory, or when explicitly asked to bootstrap a new project') with concrete trigger conditions. Not 4 because the 'when' clause is explicit and specific rather than needing more precision.

Trigger Term Quality

Natural trigger phrases like 'bootstrap a new project', 'brand-new project', and 'empty or near-empty directory' are present and would plausibly be said by users. Not 5 because common synonyms and variations ('scaffold', 'start a new project', 'initialize', 'greenfield') are missing; not 3 since keyword coverage is good rather than partial.

Distinctiveness Conflict Risk

Clear niche — bootstrapping a brand-new project in an empty or near-empty directory — with distinct triggers unlikely to fire for general planning or coding skills. Not 4 because overlap risk is minimal, not merely reduced.