Conciseness

The body is dense and operational — prompt templates, gates, and variable bindings with no padding explaining concepts Claude already knows. Not 5 because the Re-validation paragraph appears verbatim in both Step 5 and Step 10, and the standard/fullstack prompt blocks (Step 7 vs 7a/7b) nearly duplicate each other; these could be factored out.

Actionability

Every step provides a copy-paste-ready Agent tool invocation with exact subagent_type, description, and fully templated prompt, plus explicit mechanical extraction rules ("copy the named source values into the exact fields, apply only the declared serialization") and named output variables ($STEP_1_OUTPUT, $PRD_UNIT_INVENTORY). Both standard and fullstack modes are concretely covered.

Workflow Clarity

The sequence is explicit (Step 0 config → Phase 1 per-unit loop → Phase 2 → Final Report) with per-step quality gates, a verification→review→revision feedback loop with re-validation instructions, unit-completion checklists, human review checkpoints, and an error-handling table. The batch-operation validation cap does not apply because verification is pervasive and explicit.

Progressive Disclosure

Good section structure with a workflow overview, and the one file reference (references/review-resolution.md) is clearly signaled and attributed to the subagents-orchestration-guide skill, one level deep. Not 5 because the ~400-line monolithic body — including duplicated standard/fullstack prompt variants and the repeated re-validation text — has no references of its own and could be split; not 3 because navigation is easy and nothing is buried.

Specificity

The description lists several concrete actions — "Generate PRD and Design Docs" via "discovery, generation, verification, and review workflow" — against a named domain ("existing codebase"). It falls short of 5 because it omits coverage of reverse-engineering framing, document revision, or output artifacts that would make it comprehensive.

Completeness

The "what" is clear (generate PRD and Design Docs from an existing codebase through a four-stage workflow), but the "when" is entirely absent — there is no "Use when..." clause or equivalent trigger guidance, which caps completeness at 3 per the judging guidelines. Not 2 because the "what" half is explicit and specific.

Trigger Term Quality

"PRD", "Design Docs", and "codebase" are genuinely relevant keywords users would say, but the most natural trigger phrases for this niche — "reverse engineer", "document existing code", "technical documentation" — are all missing. Not 4 because the missing terms are the primary ways a user would request this skill, not just minor variations.

Distinctiveness Conflict Risk

"Generate PRD and Design Docs from existing codebase" carves a distinct reverse-engineering/documentation niche with minimal conflict risk. Not 5 because "Generate PRD" could still overlap with forward (greenfield) PRD-creation skills before the "from existing codebase" qualifier is read.