Conciseness

The body is mostly lean and purposeful, with sectioned guidance on inputs, relevance, update steps, format, fallback, and a quality checklist. A few rationale paragraphs (e.g. explaining why criteria are written before architecture exists) could be tightened, but no padding of concepts Claude already knows, so it sits above the midpoint rather than at the lean 5.

Actionability

Concrete and executable for an instruction-only skill: exact file paths, the precise 'Relevant constraints:' line format with a copy-ready markdown example, the '## [US-XX] Story title' section pattern, and explicit branch logic for when the line exists vs. does not. The rubric's instruction-only exception applies, so the absence of code is not penalized.

Workflow Clarity

A clear sequence (Input Documents → Determining Relevance → How to Update → Format → Fallback → Output Quality Check) with conditional branching and a closing verification checklist. It is a batch operation over every story section, and while the checklist provides checkpoints, there is no explicit validate→fix→retry feedback loop, capping it just below 5.

Progressive Disclosure

Well-organized into clearly headed sections with no nested or buried references; all content is appropriately inline and self-contained. No bundle files exist to reference, and at ~75 lines it exceeds the under-50-line simple-skill threshold that would allow a 5 on structure alone, so it sits at a strong 4.

Specificity

Describes one core action (adds a 'Relevant constraints' line) but enumerates the specific constraint sources it points to — 'architecture decisions, implementation heuristics, design principles, and UI kit'. Several specific targets are named, but it is a single enrichment action rather than a list of multiple distinct operations, so it sits just below the comprehensive 5.

Completeness

Explicitly states what it does (enriches each story's criteria with a Relevant constraints line) and when to use it (after Phases 3/4/5, and whenever a Phase 6 agent lacks constraint clarity), with concrete trigger phrases. Both what and when are clearly and explicitly answered.

Trigger Term Quality

Concrete triggers like 'after architecture decisions are written (Phase 3)', 'after the UI kit is approved (Phase 4)', and 'whenever a Phase 6 agent reads the acceptance criteria' give good natural-phrase coverage of the domain. A few common phrasings a user might actually say are absent, keeping it below 5.

Distinctiveness Conflict Risk

Occupies a clear niche — annotating acceptance criteria with governing constraints inside a phased project workflow — with phase-specific triggers that make overlap with unrelated skills unlikely.