Conciseness

Individual sections are lean and free of concept-explaining fluff, but the same use/skip decision is stated three times ('Activation Contract' with its checklist and 'Do NOT use for', 'When to use this skill', and 'Decision rule'), which is substantial redundant padding that could be merged into one section. This places it between 'noticeably verbose with padded sections' (2) and 'mostly efficient' (3) — the text itself is efficient, so 3 fits best, though consolidation would recover a full section.

Actionability

Concrete, copy-paste-ready templates are provided: the EARS pattern ('While <optional precondition>, when <optional trigger>, the <system name> shall <system response>') with a worked example, the task-format markdown template, and exact output paths (specs/<spec_name>/requirements.md, design.md, tasks.md). Not level 5 because Phases 1-2 'What to do' bullets are directives without a worked example (e.g., no sample requirements.md or design.md structure).

Workflow Clarity

The four-phase sequence (Requirements -> Design -> Tasks -> Execution) is clearly ordered with explicit user-confirmation checkpoints ('Require confirmation between requirements, design, and task breakdown', 'Only start implementation after the user confirms the task plan'). This is a planning workflow, not a destructive/batch operation, so the validation cap does not apply; it falls short of level 5 only because Phase 4 lacks verification steps (e.g., checking every task links back to a requirement).

Progressive Disclosure

No bundle files exist (no references/, scripts/, assets/), and all content is inline with clear section headers; the sibling-skill pointers (../ui-design/SKILL.md, ../data-model-creation/SKILL.md) are one level deep and clearly signaled. The ~150-line body is appropriately self-contained for a process skill, so per the rubric's bundle-structure guideline this is well-organized inline content with minor organization gaps (the duplicated decision sections), matching the level-4 anchor rather than the under-50-line simple-skill exception.

Specificity

The description names the domain and the three planning activities ("explicit requirements, technical design, and task planning"), but these are stated as needs ("changes need...") rather than concrete actions the skill performs, and no concrete outputs (e.g., requirements.md, design.md, tasks.md) are named. It matches 'names domain and 1-2 concrete actions, but not comprehensive' more than the level-4 anchor, which expects an explicit list of specific actions with only minor coverage gaps.

Completeness

It has an explicit 'Use when...' trigger clause, satisfying the rubric's cap rule, and the 'what' is inferable (requirements, design, and task planning) but is embedded in the 'when' clause rather than stated as an explicit capability (e.g., 'Create requirements, design, and task-plan documents'). Both are present with one imperfect — matching the level-4 anchor rather than the fully explicit level-5 anchor.

Trigger Term Quality

Terms like "requirements", "technical design", "task planning", "multi-module work", "unclear acceptance criteria", and "architecture-heavy requests" are natural phrases a user would say when they need this skill. A few common synonyms are missing (e.g., "spec", "feature", "refactor", "PRD"), so it does not reach the comprehensive level-5 anchor.

Distinctiveness Conflict Risk

The spec-driven development niche (requirements -> design -> tasks before implementation) is fairly distinct with targeted triggers, but it could overlap with generic planning or project-management skills for phrases like 'task planning' or 'architecture'. Minor overlap risk with closely related skills matches the level-4 anchor.